mirrors
/
emacs
mirror of https://github.com/emacs-mirror/emacs.git
0
0
Fork 0
Code Issues Projects Releases Wiki Activity
emacs/src/sysdep.c

4764 lines
126 KiB
C
Raw Permalink Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Interfaces to system-dependent kernel and library entries.
Copyright (C) 1985-1988, 1993-1995, 1999-2024 Free Software
Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <execinfo.h>
#include "sysstdio.h"
#ifdef HAVE_PWD_H
#include <pwd.h>
#include <grp.h>
#endif /* HAVE_PWD_H */
#include <limits.h>
#include <stdlib.h>
#include <sys/random.h>
#include <unistd.h>
#include <c-ctype.h>
#include <close-stream.h>
#include <pathmax.h>
#include <utimens.h>
#include "lisp.h"
#include "sysselect.h"
#include "blockinput.h"
#ifdef HAVE_LINUX_FS_H
# include <linux/fs.h>
# include <sys/syscall.h>
#endif
#ifdef CYGWIN
# include <cygwin/fs.h>
#endif
#if defined DARWIN_OS || defined __FreeBSD__ || defined __OpenBSD__
# include <sys/sysctl.h>
#endif
#if defined __OpenBSD__
# include <sys/proc.h>
#endif
#ifdef DARWIN_OS
# include <libproc.h>
#endif
#ifdef __FreeBSD__
/* Sparc/ARM machine/frame.h has 'struct frame' which conflicts with Emacs's
'struct frame', so rename it. */
# define frame freebsd_frame
# include <sys/user.h>
# undef frame
# include <math.h>
#endif
#ifdef HAVE_SOCKETS
#include <sys/socket.h>
#include <netdb.h>
#endif /* HAVE_SOCKETS */
#ifdef WINDOWSNT
#define read sys_read
#define write sys_write
#ifndef STDERR_FILENO
#define STDERR_FILENO fileno(GetStdHandle(STD_ERROR_HANDLE))
#endif
#include "w32.h"
#endif /* WINDOWSNT */
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
/* Get SI_SRPC_DOMAIN, if it is available. */
#ifdef HAVE_SYS_SYSTEMINFO_H
#include <sys/systeminfo.h>
#endif
#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
#include "msdos.h"
#endif
#include <sys/param.h>
#include <sys/file.h>
#include <fcntl.h>
#include "syssignal.h"
#include "systime.h"
#include "systty.h"
#include "syswait.h"
#ifdef HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
#ifdef HAVE_SYS_UTSNAME_H
# include <sys/utsname.h>
# include <memory.h>
#endif
#include "keyboard.h"
#include "frame.h"
#include "termhooks.h"
#include "termchar.h"
#include "termopts.h"
#include "process.h"
#include "cm.h"
#ifdef WINDOWSNT
# include <direct.h>
/* In process.h which conflicts with the local copy. */
# define _P_WAIT 0
int _cdecl _spawnlp (int, const char *, const char *, ...);
/* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
several prototypes of functions called below. */
# include <sys/socket.h>
#endif
#ifdef HAVE_ANDROID
#include "android.h"
#endif
#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY
#include "sfntfont.h"
#endif
/* Declare here, including term.h is problematic on some systems. */
extern void tputs (const char *, int, int (*)(int));
static const int baud_convert[] =
{
0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
1800, 2400, 4800, 9600, 19200, 38400
};
#ifdef HAVE_PERSONALITY_ADDR_NO_RANDOMIZE
# include <sys/personality.h>
/* If not -1, the personality that should be restored before exec. */
static int exec_personality;
/* Try to disable randomization if the current process needs it and
does not appear to have it already. */
int
maybe_disable_address_randomization (int argc, char **argv)
{
/* Undocumented Emacs option used only by this function. */
static char const aslr_disabled_option[] = "--__aslr-disabled";
if (argc < 2 || strcmp (argv[1], aslr_disabled_option) != 0)
{
/* If dumping via unexec, ASLR must be disabled, as otherwise
data may be scattered and undumpable as a simple executable.
If pdumping, disabling ASLR lessens differences in the .pdmp file. */
bool disable_aslr = will_dump_p ();
# ifdef __PPC64__
disable_aslr = true;
# endif
exec_personality = disable_aslr ? personality (0xffffffff) : -1;
if (exec_personality & ADDR_NO_RANDOMIZE)
exec_personality = -1;
if (exec_personality != -1
&& personality (exec_personality | ADDR_NO_RANDOMIZE) != -1)
{
char **newargv = malloc ((argc + 2) * sizeof *newargv);
if (newargv)
{
/* Invoke self with undocumented option. */
newargv[0] = argv[0];
newargv[1] = (char *) aslr_disabled_option;
memcpy (&newargv[2], &argv[1], argc * sizeof *newargv);
execvp (newargv[0], newargv);
}
/* If malloc or execvp fails, warn and then try anyway. */
perror (argv[0]);
free (newargv);
}
}
else
{
/* Our earlier incarnation already disabled ASLR. */
argc--;
memmove (&argv[1], &argv[2], argc * sizeof *argv);
}
return argc;
}
#endif
#ifndef WINDOWSNT
/* Execute the program in FILE, with argument vector ARGV and environ
ENVP. Return an error number if unsuccessful. This is like execve
except it reenables ASLR in the executed program if necessary, and
on error it returns an error number rather than -1. */
int
emacs_exec_file (char const *file, char *const *argv, char *const *envp)
{
#ifdef HAVE_PERSONALITY_ADDR_NO_RANDOMIZE
if (exec_personality != -1)
personality (exec_personality);
#endif
execve (file, argv, envp);
return errno;
}
#endif /* !WINDOWSNT */
/* If FD is not already open, arrange for it to be open with FLAGS. */
static void
force_open (int fd, int flags)
{
if (dup2 (fd, fd) < 0 && errno == EBADF)
{
int n = open (NULL_DEVICE, flags);
if (n < 0 || (fd != n && (dup2 (n, fd) < 0 || emacs_close (n) != 0)))
{
emacs_perror (NULL_DEVICE);
exit (EXIT_FAILURE);
}
}
}
/* A stream that is like stderr, except line buffered. It is NULL
during startup, or if line buffering is not in use. */
static FILE *buferr;
/* Make sure stdin, stdout, and stderr are open to something, so that
their file descriptors are not hijacked by later system calls. */
void
init_standard_fds (void)
{
/* Open stdin for *writing*, and stdout and stderr for *reading*.
That way, any attempt to do normal I/O will result in an error,
just as if the files were closed, and the file descriptors will
not be reused by later opens. */
force_open (STDIN_FILENO, O_WRONLY);
force_open (STDOUT_FILENO, O_RDONLY);
force_open (STDERR_FILENO, O_RDONLY);
/* Set buferr if possible on platforms defining _PC_PIPE_BUF, as
they support the notion of atomic writes to pipes. */
#ifdef _PC_PIPE_BUF
buferr = emacs_fdopen (STDERR_FILENO, "w");
if (buferr)
setvbuf (buferr, NULL, _IOLBF, 0);
#endif
}
/* Return the current working directory. The result should be freed
with 'free'. Return NULL (setting errno) on errors. If the
current directory is unreachable, return either NULL or a string
beginning with '('. */
static char *
get_current_dir_name_or_unreachable (void)
{
/* Use malloc, not xmalloc, since this function can be called before
the xmalloc exception machinery is available. */
char *pwd;
/* The maximum size of a directory name, including the terminating null.
Leave room so that the caller can append a trailing slash. */
ptrdiff_t dirsize_max = min (PTRDIFF_MAX, SIZE_MAX) - 1;
/* The maximum size of a buffer for a file name, including the
terminating null. This is bounded by PATH_MAX, if available. */
ptrdiff_t bufsize_max = dirsize_max;
#ifdef PATH_MAX
bufsize_max = min (bufsize_max, PATH_MAX);
#endif
# if HAVE_GET_CURRENT_DIR_NAME && !BROKEN_GET_CURRENT_DIR_NAME
# ifdef HYBRID_MALLOC
bool use_libc = will_dump_with_unexec_p ();
# else
bool use_libc = true;
# endif
if (use_libc)
{
/* For an unreachable directory, this returns a string that starts
with "(unreachable)"; see Bug#27871. */
pwd = get_current_dir_name ();
if (pwd)
{
if (strnlen (pwd, dirsize_max) < dirsize_max)
return pwd;
free (pwd);
errno = ERANGE;
}
return NULL;
}
# endif
size_t pwdlen;
struct stat dotstat, pwdstat;
pwd = getenv ("PWD");
/* If PWD is accurate, use it instead of calling getcwd. PWD is
sometimes a nicer name, and using it may avoid a fatal error if a
parent directory is searchable but not readable. */
if (pwd
&& (pwdlen = strnlen (pwd, bufsize_max)) < bufsize_max
&& IS_DIRECTORY_SEP (pwd[pwdlen && IS_DEVICE_SEP (pwd[1]) ? 2 : 0])
&& emacs_fstatat (AT_FDCWD, pwd, &pwdstat, 0) == 0
&& emacs_fstatat (AT_FDCWD, ".", &dotstat, 0) == 0
&& dotstat.st_ino == pwdstat.st_ino
&& dotstat.st_dev == pwdstat.st_dev)
return strdup (pwd);
else
{
ptrdiff_t buf_size = min (bufsize_max, 1024);
for (;;)
{
char *buf = malloc (buf_size);
if (!buf)
return NULL;
if (getcwd (buf, buf_size) == buf)
return buf;
free (buf);
if (errno != ERANGE || buf_size == bufsize_max)
return NULL;
buf_size = buf_size <= bufsize_max / 2 ? 2 * buf_size : bufsize_max;
}
}
}
/* Return the current working directory. The result should be freed
with 'free'. Return NULL (setting errno) on errors; an unreachable
directory (e.g., its name starts with '(') counts as an error. */
char *
emacs_get_current_dir_name (void)
{
char *dir = get_current_dir_name_or_unreachable ();
if (dir && *dir == '(')
{
free (dir);
errno = ENOENT;
return NULL;
}
return dir;
}
/* Discard pending input on all input descriptors. */
void
discard_tty_input (void)
{
#ifndef WINDOWSNT
struct emacs_tty buf;
if (noninteractive)
return;
#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
while (dos_keyread () != -1)
;
#else /* not MSDOS */
{
struct tty_display_info *tty;
for (tty = tty_list; tty; tty = tty->next)
{
if (tty->input) /* Is the device suspended? */
{
emacs_get_tty (fileno (tty->input), &buf);
emacs_set_tty (fileno (tty->input), &buf, 0);
}
}
}
#endif /* not MSDOS */
#endif /* not WINDOWSNT */
}
#ifdef SIGTSTP
/* Arrange for character C to be read as the next input from
the terminal.
XXX What if we have multiple ttys?
*/
void
stuff_char (char c)
{
if (! (FRAMEP (selected_frame)
&& FRAME_LIVE_P (XFRAME (selected_frame))
&& FRAME_TERMCAP_P (XFRAME (selected_frame))))
return;
/* Should perhaps error if in batch mode */
#ifdef TIOCSTI
ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
#else /* no TIOCSTI */
error ("Cannot stuff terminal input characters in this version of Unix");
#endif /* no TIOCSTI */
}
#endif /* SIGTSTP */
void
init_baud_rate (int fd)
{
int emacs_ospeed;
if (noninteractive)
emacs_ospeed = 0;
else
{
#ifdef DOS_NT
emacs_ospeed = 15;
#else /* not DOS_NT */
struct termios sg;
sg.c_cflag = B9600;
tcgetattr (fd, &sg);
emacs_ospeed = cfgetospeed (&sg);
#endif /* not DOS_NT */
}
baud_rate = (emacs_ospeed < ARRAYELTS (baud_convert)
? baud_convert[emacs_ospeed] : 9600);
if (baud_rate == 0)
baud_rate = 1200;
}
#ifndef MSDOS
/* Wait for the subprocess with process id CHILD to terminate or change status.
CHILD must be a child process that has not been reaped.
If STATUS is non-null, store the waitpid-style exit status into *STATUS
and tell wait_reading_process_output that it needs to look around.
Use waitpid-style OPTIONS when waiting.
If INTERRUPTIBLE, this function is interruptible by a signal.
Return CHILD if successful, 0 if no status is available, and a
negative value (setting errno) if waitpid is buggy. */
static pid_t
get_child_status (pid_t child, int *status, int options, bool interruptible)
{
pid_t pid;
/* Invoke waitpid only with a known process ID; do not invoke
waitpid with a nonpositive argument. Otherwise, Emacs might
reap an unwanted process by mistake. For example, invoking
waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
so that another thread running glib won't find them. */
eassert (child > 0);
while (true)
{
/* Note: the MS-Windows emulation of waitpid calls maybe_quit
internally. */
if (interruptible)
maybe_quit ();
pid = waitpid (child, status, options);
if (0 <= pid)
break;
if (errno != EINTR)
{
/* Most likely, waitpid is buggy and the operating system
lost track of the child somehow. Return -1 and let the
caller try to figure things out. Possibly the bug could
cause Emacs to kill the wrong process. Oh well. */
return pid;
}
}
/* If successful and status is requested, tell wait_reading_process_output
that it needs to wake up and look around. */
if (pid && status && input_available_clear_time)
*input_available_clear_time = make_timespec (0, 0);
return pid;
}
/* Wait for the subprocess with process id CHILD to terminate.
CHILD must be a child process that has not been reaped.
If STATUS is non-null, store the waitpid-style exit status into *STATUS
and tell wait_reading_process_output that it needs to look around.
If INTERRUPTIBLE, this function is interruptible by a signal.
Return true if successful, false (setting errno) if CHILD cannot be
waited for because waitpid is buggy. */
bool
wait_for_termination (pid_t child, int *status, bool interruptible)
{
return 0 <= get_child_status (child, status, 0, interruptible);
}
/* Report whether the subprocess with process id CHILD has changed status.
Termination counts as a change of status.
CHILD must be a child process that has not been reaped.
If STATUS is non-null, store the waitpid-style exit status into *STATUS
and tell wait_reading_process_output that it needs to look around.
Use waitpid-style OPTIONS to check status, but do not wait.
Return CHILD if successful, 0 if no status is available because
the process's state has not changed. */
pid_t
child_status_changed (pid_t child, int *status, int options)
{
return get_child_status (child, status, WNOHANG | options, 0);
}
/* Set up the terminal at the other end of a pseudo-terminal that
we will be controlling an inferior through.
It should not echo or do line-editing, since that is done
in Emacs. No padding needed for insertion into an Emacs buffer. */
void
child_setup_tty (int out)
{
#ifndef WINDOWSNT
struct emacs_tty s;
emacs_get_tty (out, &s);
s.main.c_oflag |= OPOST; /* Enable output postprocessing */
s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
#ifdef NLDLY
/* https://lists.gnu.org/r/emacs-devel/2008-05/msg00406.html
Some versions of GNU Hurd do not have FFDLY? */
#ifdef FFDLY
s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
/* No output delays */
#else
s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY);
/* No output delays */
#endif
#endif
s.main.c_lflag &= ~ECHO; /* Disable echo */
s.main.c_lflag |= ISIG; /* Enable signals */
#ifdef IUCLC
s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
#endif
#ifdef ISTRIP
s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
#endif
#ifdef OLCUC
s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
#endif
s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
#ifdef HPUX
s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
#endif /* HPUX */
#ifdef SIGNALS_VIA_CHARACTERS
/* the QUIT and INTR character are used in process_send_signal
so set them here to something useful. */
if (s.main.c_cc[VQUIT] == CDISABLE)
s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
if (s.main.c_cc[VINTR] == CDISABLE)
s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
#endif /* not SIGNALS_VIA_CHARACTERS */
#ifdef AIX
/* Also, PTY overloads NUL and BREAK.
don't ignore break, but don't signal either, so it looks like NUL. */
s.main.c_iflag &= ~IGNBRK;
s.main.c_iflag &= ~BRKINT;
/* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
would force it to 0377. That looks like duplicated code. */
s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
#endif /* AIX */
/* We originally enabled ICANON (and set VEOF to 04), and then had
process.c send additional EOF chars to flush the output when faced
with long lines, but this leads to weird effects when the
subprocess has disabled ICANON and ends up seeing those spurious
extra EOFs. So we don't send EOFs any more in
process.c:send_process. First we tried to disable ICANON by
default, so if a subsprocess sets up ICANON, it's his problem (or
the Elisp package that talks to it) to deal with lines that are
too long. But this disables some features, such as the ability
to send EOF signals. So we re-enabled ICANON but there is no
more "send eof to flush" going on (which is wrong and unportable
in itself). The correct way to handle too much output is to
buffer what could not be written and then write it again when
select returns ok for writing. This has it own set of
problems. Write is now asynchronous, is that a problem? How much
do we buffer, and what do we do when that limit is reached? */
s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */
s.main.c_cc[VEOF] = 'D'&037; /* Control-D */
#if 0 /* These settings only apply to non-ICANON mode. */
s.main.c_cc[VMIN] = 1;
s.main.c_cc[VTIME] = 0;
#endif
emacs_set_tty (out, &s, 0);
#endif /* not WINDOWSNT */
}
#endif /* not MSDOS */
/* Record a signal code and the action for it. */
struct save_signal
{
int code;
struct sigaction action;
};
static void save_signal_handlers (struct save_signal *);
static void restore_signal_handlers (struct save_signal *);
/* Suspend the Emacs process; give terminal to its superior. */
void
sys_suspend (void)
{
#ifndef DOS_NT
kill (0, SIGTSTP);
#else
/* On a system where suspending is not implemented,
instead fork a subshell and let it talk directly to the terminal
while we wait. */
sys_subshell ();
#endif
}
/* Fork a subshell. */
void
sys_subshell (void)
{
#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
#ifdef MSDOS
int st;
char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
#else
char oldwd[MAX_UTF8_PATH];
#endif /* MSDOS */
#else /* !DOS_NT */
int status;
#endif
pid_t pid;
struct save_signal saved_handlers[5];
char *str = SSDATA (get_current_directory (true));
#ifdef DOS_NT
pid = 0;
#else
{
char *volatile str_volatile = str;
pid = VFORK ();
str = str_volatile;
}
#endif
if (pid < 0)
error ("Can't spawn subshell");
saved_handlers[0].code = SIGINT;
saved_handlers[1].code = SIGQUIT;
saved_handlers[2].code = SIGTERM;
#ifdef USABLE_SIGIO
saved_handlers[3].code = SIGIO;
saved_handlers[4].code = 0;
#elif defined (USABLE_SIGPOLL)
saved_handlers[3].code = SIGPOLL;
saved_handlers[4].code = 0;
#else
saved_handlers[3].code = 0;
#endif
#ifdef DOS_NT
save_signal_handlers (saved_handlers);
#endif
if (pid == 0)
{
const char *sh = 0;
#ifdef DOS_NT /* MW, Aug 1993 */
getcwd (oldwd, sizeof oldwd);
if (sh == 0)
sh = egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
#endif
if (sh == 0)
sh = egetenv ("SHELL");
if (sh == 0)
sh = "sh";
/* Use our buffer's default directory for the subshell. */
if (chdir (str) != 0)
{
#ifndef DOS_NT
emacs_perror (str);
_exit (EXIT_CANCELED);
#endif
}
#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
{
char *epwd = getenv ("PWD");
char old_pwd[MAXPATHLEN+1+4];
/* If PWD is set, pass it with corrected value. */
if (epwd)
{
strcpy (old_pwd, epwd);
setenv ("PWD", str, 1);
}
st = system (sh);
chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
if (epwd)
putenv (old_pwd); /* restore previous value */
}
#else /* not MSDOS */
#ifdef WINDOWSNT
/* Waits for process completion */
pid = _spawnlp (_P_WAIT, sh, sh, NULL);
chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
if (pid == -1)
write (1, "Can't execute subshell", 22);
#else /* not WINDOWSNT */
execlp (sh, sh, (char *) 0);
emacs_perror (sh);
_exit (errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE);
#endif /* not WINDOWSNT */
#endif /* not MSDOS */
}
/* Do this now if we did not do it before. */
#ifndef MSDOS
save_signal_handlers (saved_handlers);
#endif
#ifndef DOS_NT
wait_for_termination (pid, &status, 0);
#endif
restore_signal_handlers (saved_handlers);
}
static void
save_signal_handlers (struct save_signal *saved_handlers)
{
while (saved_handlers->code)
{
struct sigaction action;
emacs_sigaction_init (&action, SIG_IGN);
sigaction (saved_handlers->code, &action, &saved_handlers->action);
saved_handlers++;
}
}
static void
restore_signal_handlers (struct save_signal *saved_handlers)
{
while (saved_handlers->code)
{
sigaction (saved_handlers->code, &saved_handlers->action, 0);
saved_handlers++;
}
}
#ifdef USABLE_SIGIO
static int old_fcntl_flags[FD_SETSIZE];
#endif
void
init_sigio (int fd)
{
#ifdef USABLE_SIGIO
old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
interrupts_deferred = 0;
#endif
}
#ifndef HAVE_ANDROID
#ifndef DOS_NT
#ifdef F_SETOWN
static void
reset_sigio (int fd)
{
#ifdef USABLE_SIGIO
fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
#endif
}
#endif /* F_SETOWN */
#endif
#endif
void
request_sigio (void)
{
#if defined (USABLE_SIGIO) || defined (USABLE_SIGPOLL)
sigset_t unblocked;
if (noninteractive)
return;
sigemptyset (&unblocked);
# ifdef SIGWINCH
sigaddset (&unblocked, SIGWINCH);
# endif
# ifdef USABLE_SIGIO
sigaddset (&unblocked, SIGIO);
# else
sigaddset (&unblocked, SIGPOLL);
# endif
pthread_sigmask (SIG_UNBLOCK, &unblocked, 0);
interrupts_deferred = 0;
#endif
}
void
unrequest_sigio (void)
{
#if defined (USABLE_SIGIO) || defined (USABLE_SIGPOLL)
sigset_t blocked;
if (noninteractive)
return;
sigemptyset (&blocked);
# ifdef SIGWINCH
sigaddset (&blocked, SIGWINCH);
# endif
# ifdef USABLE_SIGIO
sigaddset (&blocked, SIGIO);
# else
sigaddset (&blocked, SIGPOLL);
# endif
pthread_sigmask (SIG_BLOCK, &blocked, 0);
interrupts_deferred = 1;
#endif
}
#ifndef MSDOS
/* Block SIGCHLD. */
void
block_child_signal (sigset_t *oldset)
{
sigset_t blocked;
sigemptyset (&blocked);
sigaddset (&blocked, SIGCHLD);
sigaddset (&blocked, SIGINT);
pthread_sigmask (SIG_BLOCK, &blocked, oldset);
}
/* Unblock SIGCHLD. */
void
unblock_child_signal (sigset_t const *oldset)
{
pthread_sigmask (SIG_SETMASK, oldset, 0);
}
#endif /* !MSDOS */
/* Block SIGINT. */
void
block_interrupt_signal (sigset_t *oldset)
{
sigset_t blocked;
sigemptyset (&blocked);
sigaddset (&blocked, SIGINT);
pthread_sigmask (SIG_BLOCK, &blocked, oldset);
}
/* Restore previously saved signal mask. */
void
restore_signal_mask (sigset_t const *oldset)
{
pthread_sigmask (SIG_SETMASK, oldset, 0);
}
/* Saving and restoring the process group of Emacs's terminal. */
/* The process group of which Emacs was a member when it initially
started.
If Emacs was in its own process group (i.e. inherited_pgroup ==
getpid ()), then we know we're running under a shell with job
control (Emacs would never be run as part of a pipeline).
Everything is fine.
If Emacs was not in its own process group, then we know we're
running under a shell (or a caller) that doesn't know how to
separate itself from Emacs (like sh). Emacs must be in its own
process group in order to receive SIGIO correctly. In this
situation, we put ourselves in our own pgroup, forcibly set the
tty's pgroup to our pgroup, and make sure to restore and reinstate
the tty's pgroup just like any other terminal setting. If
inherited_group was not the tty's pgroup, then we'll get a
SIGTTmumble when we try to change the tty's pgroup, and a CONT if
it goes foreground in the future, which is what should happen. */
static pid_t inherited_pgroup;
void
init_foreground_group (void)
{
pid_t pgrp = getpgrp ();
inherited_pgroup = getpid () == pgrp ? 0 : pgrp;
}
/* Block and unblock SIGTTOU. */
void
block_tty_out_signal (sigset_t *oldset)
{
#ifdef SIGTTOU
sigset_t blocked;
sigemptyset (&blocked);
sigaddset (&blocked, SIGTTOU);
pthread_sigmask (SIG_BLOCK, &blocked, oldset);
#endif
}
void
unblock_tty_out_signal (sigset_t const *oldset)
{
#ifdef SIGTTOU
pthread_sigmask (SIG_SETMASK, oldset, 0);
#endif
}
/* Safely set a controlling terminal FD's process group to PGID.
If we are not in the foreground already, POSIX requires tcsetpgrp
to deliver a SIGTTOU signal, which would stop us. This is an
annoyance, so temporarily ignore the signal.
In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so
skip all this unless SIGTTOU is defined. */
static void
tcsetpgrp_without_stopping (int fd, pid_t pgid)
{
#ifdef SIGTTOU
sigset_t oldset;
block_input ();
block_tty_out_signal (&oldset);
tcsetpgrp (fd, pgid);
unblock_tty_out_signal (&oldset);
unblock_input ();
#endif
}
/* Split off the foreground process group to Emacs alone. When we are
in the foreground, but not started in our own process group,
redirect the tty device handle FD to point to our own process
group. FD must be the file descriptor of the controlling tty. */
static void
narrow_foreground_group (int fd)
{
if (inherited_pgroup && setpgid (0, 0) == 0)
tcsetpgrp_without_stopping (fd, getpid ());
}
#ifndef HAVE_ANDROID
/* Set the tty to our original foreground group. */
static void
widen_foreground_group (int fd)
{
if (inherited_pgroup && setpgid (0, inherited_pgroup) == 0)
tcsetpgrp_without_stopping (fd, inherited_pgroup);
}
#endif
/* Getting and setting emacs_tty structures. */
/* Set *TC to the parameters associated with the terminal FD,
or clear it if the parameters are not available.
Return 0 on success, -1 on failure. */
int
emacs_get_tty (int fd, struct emacs_tty *settings)
{
/* Retrieve the primary parameters - baud rate, character size, etcetera. */
memset (&settings->main, 0, sizeof (settings->main));
#ifdef DOS_NT
#ifdef WINDOWSNT
HANDLE h = (HANDLE)_get_osfhandle (fd);
DWORD console_mode;
if (h && h != INVALID_HANDLE_VALUE && GetConsoleMode (h, &console_mode))
{
settings->main = console_mode;
return 0;
}
#endif /* WINDOWSNT */
return -1;
#else /* !DOS_NT */
/* We have those nifty POSIX tcmumbleattr functions. */
return tcgetattr (fd, &settings->main);
#endif
}
/* Set the parameters of the tty on FD according to the contents of
*SETTINGS. If FLUSHP, discard input.
Return 0 if all went well, and -1 (setting errno) if anything failed. */
int
emacs_set_tty (int fd, struct emacs_tty *settings, bool flushp)
{
/* Set the primary parameters - baud rate, character size, etcetera. */
#ifdef DOS_NT
#ifdef WINDOWSNT
HANDLE h = (HANDLE)_get_osfhandle (fd);
if (h && h != INVALID_HANDLE_VALUE)
{
DWORD new_mode;
/* Assume the handle is open for input. */
if (flushp)
FlushConsoleInputBuffer (h);
new_mode = settings->main;
SetConsoleMode (h, new_mode);
}
#endif /* WINDOWSNT */
#else /* !DOS_NT */
int i;
/* We have those nifty POSIX tcmumbleattr functions.
William J. Smith <wjs@wiis.wang.com> writes:
"POSIX 1003.1 defines tcsetattr to return success if it was
able to perform any of the requested actions, even if some
of the requested actions could not be performed.
We must read settings back to ensure tty setup properly.
AIX requires this to keep tty from hanging occasionally." */
/* This make sure that we don't loop indefinitely in here. */
for (i = 0 ; i < 10 ; i++)
if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
{
if (errno == EINTR)
continue;
else
return -1;
}
else
{
struct termios new;
memset (&new, 0, sizeof (new));
/* Get the current settings, and see if they're what we asked for. */
tcgetattr (fd, &new);
/* We cannot use memcmp on the whole structure here because under
* aix386 the termios structure has some reserved field that may
* not be filled in.
*/
if ( new.c_iflag == settings->main.c_iflag
&& new.c_oflag == settings->main.c_oflag
&& new.c_cflag == settings->main.c_cflag
&& new.c_lflag == settings->main.c_lflag
&& memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
break;
else
continue;
}
#endif
/* We have survived the tempest. */
return 0;
}
#ifdef F_SETOWN
static int old_fcntl_owner[FD_SETSIZE];
#endif /* F_SETOWN */
/* Initialize the terminal mode on all tty devices that are currently
open. */
void
init_all_sys_modes (void)
{
struct tty_display_info *tty;
for (tty = tty_list; tty; tty = tty->next)
init_sys_modes (tty);
}
/* Initialize the terminal mode on the given tty device. */
void
init_sys_modes (struct tty_display_info *tty_out)
{
struct emacs_tty tty;
#ifndef DOS_NT
Lisp_Object terminal;
#endif
Vtty_erase_char = Qnil;
if (noninteractive)
return;
if (!tty_out->output)
return; /* The tty is suspended. */
narrow_foreground_group (fileno (tty_out->input));
if (! tty_out->old_tty)
tty_out->old_tty = xmalloc (sizeof *tty_out->old_tty);
emacs_get_tty (fileno (tty_out->input), tty_out->old_tty);
tty = *tty_out->old_tty;
#if !defined (DOS_NT)
XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
#ifdef INLCR /* I'm just being cautious,
since I can't check how widespread INLCR is--rms. */
tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
#endif
#ifdef ISTRIP
tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
#endif
tty.main.c_lflag &= ~ECHO; /* Disable echo */
tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
#ifdef IEXTEN
tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
#endif
tty.main.c_lflag |= ISIG; /* Enable signals */
if (tty_out->flow_control)
{
tty.main.c_iflag |= IXON; /* Enable start/stop output control */
#ifdef IXANY
tty.main.c_iflag &= ~IXANY;
#endif /* IXANY */
}
else
tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
on output */
tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
#ifdef CS8
if (tty_out->meta_key)
{
tty.main.c_cflag |= CS8; /* allow 8th bit on input */
tty.main.c_cflag &= ~PARENB;/* Don't check parity */
}
#endif
XSETTERMINAL(terminal, tty_out->terminal);
if (!NILP (Fcontrolling_tty_p (terminal)))
{
tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
/* Set up C-g for both SIGQUIT and SIGINT.
We don't know which we will get, but we handle both alike
so which one it really gives us does not matter. */
tty.main.c_cc[VQUIT] = quit_char;
}
else
{
/* We normally don't get interrupt or quit signals from tty
devices other than our controlling terminal; therefore,
we must handle C-g as normal input. Unfortunately, this
means that the interrupt and quit feature must be
disabled on secondary ttys, or we would not even see the
keypress.
Note that even though emacsclient could have special code
to pass SIGINT to Emacs, we should _not_ enable
interrupt/quit keys for emacsclient frames. This means
that we can't break out of loops in C code from a
secondary tty frame, but we can always decide what
display the C-g came from, which is more important from a
usability point of view. (Consider the case when two
people work together using the same Emacs instance.) */
tty.main.c_cc[VINTR] = CDISABLE;
tty.main.c_cc[VQUIT] = CDISABLE;
}
tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
#ifdef VSWTCH
tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
of C-z */
#endif /* VSWTCH */
#ifdef VSUSP
tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */
#endif /* VSUSP */
#ifdef V_DSUSP
tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */
#endif /* V_DSUSP */
#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
tty.main.c_cc[VDSUSP] = CDISABLE;
#endif /* VDSUSP */
#ifdef VLNEXT
tty.main.c_cc[VLNEXT] = CDISABLE;
#endif /* VLNEXT */
#ifdef VREPRINT
tty.main.c_cc[VREPRINT] = CDISABLE;
#endif /* VREPRINT */
#ifdef VWERASE
tty.main.c_cc[VWERASE] = CDISABLE;
#endif /* VWERASE */
#ifdef VDISCARD
tty.main.c_cc[VDISCARD] = CDISABLE;
#endif /* VDISCARD */
if (tty_out->flow_control)
{
#ifdef VSTART
tty.main.c_cc[VSTART] = '\021';
#endif /* VSTART */
#ifdef VSTOP
tty.main.c_cc[VSTOP] = '\023';
#endif /* VSTOP */
}
else
{
#ifdef VSTART
tty.main.c_cc[VSTART] = CDISABLE;
#endif /* VSTART */
#ifdef VSTOP
tty.main.c_cc[VSTOP] = CDISABLE;
#endif /* VSTOP */
}
#ifdef AIX
tty.main.c_cc[VSTRT] = CDISABLE;
tty.main.c_cc[VSTOP] = CDISABLE;
tty.main.c_cc[VSUSP] = CDISABLE;
tty.main.c_cc[VDSUSP] = CDISABLE;
if (tty_out->flow_control)
{
#ifdef VSTART
tty.main.c_cc[VSTART] = '\021';
#endif /* VSTART */
#ifdef VSTOP
tty.main.c_cc[VSTOP] = '\023';
#endif /* VSTOP */
}
/* Also, PTY overloads NUL and BREAK.
don't ignore break, but don't signal either, so it looks like NUL.
This really serves a purpose only if running in an XTERM window
or via TELNET or the like, but does no harm elsewhere. */
tty.main.c_iflag &= ~IGNBRK;
tty.main.c_iflag &= ~BRKINT;
#endif
#endif /* not DOS_NT */
#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
if (!tty_out->term_initted)
internal_terminal_init ();
dos_ttraw (tty_out);
#endif
emacs_set_tty (fileno (tty_out->input), &tty, 0);
/* This code added to insure that, if flow-control is not to be used,
we have an unlocked terminal at the start. */
#ifndef HAIKU /* On Haiku, TCXONC is a no-op and causes spurious
compiler warnings. */
#ifdef TCXONC
if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
#endif
#endif /* HAIKU */
#ifdef TIOCSTART
if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
#endif
#if !defined (DOS_NT)
#ifdef TCOON
if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
#endif
#endif
#ifdef F_GETOWN
if (interrupt_input)
{
old_fcntl_owner[fileno (tty_out->input)] =
fcntl (fileno (tty_out->input), F_GETOWN, 0);
fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
init_sigio (fileno (tty_out->input));
#ifdef HAVE_GPM
if (gpm_tty == tty_out)
{
/* Arrange for mouse events to give us SIGIO signals. */
fcntl (gpm_fd, F_SETOWN, getpid ());
fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
init_sigio (gpm_fd);
}
#endif /* HAVE_GPM */
}
#endif /* F_GETOWN */
const size_t buffer_size = (tty_out->output_buffer_size
? tty_out->output_buffer_size
: BUFSIZ);
setvbuf (tty_out->output, NULL, _IOFBF, buffer_size);
if (tty_out->terminal->set_terminal_modes_hook)
tty_out->terminal->set_terminal_modes_hook (tty_out->terminal);
if (!tty_out->term_initted)
{
Lisp_Object tail, frame;
FOR_EACH_FRAME (tail, frame)
{
/* XXX This needs to be revised. */
if (FRAME_TERMCAP_P (XFRAME (frame))
&& FRAME_TTY (XFRAME (frame)) == tty_out)
init_frame_faces (XFRAME (frame));
}
}
if (tty_out->term_initted && no_redraw_on_reenter)
{
/* We used to call "direct_output_forward_char(0)" here,
but it's not clear why, since it may not do anything anyway. */
}
else
{
Lisp_Object tail, frame;
frame_garbaged = 1;
FOR_EACH_FRAME (tail, frame)
{
if ((FRAME_TERMCAP_P (XFRAME (frame))
|| FRAME_MSDOS_P (XFRAME (frame)))
&& FRAME_TTY (XFRAME (frame)) == tty_out)
FRAME_GARBAGED_P (XFRAME (frame)) = 1;
}
}
tty_out->term_initted = 1;
}
/* Return true if safe to use tabs in output.
At the time this is called, init_sys_modes has not been done yet. */
bool
tabs_safe_p (int fd)
{
struct emacs_tty etty;
emacs_get_tty (fd, &etty);
#ifndef DOS_NT
#ifdef TABDLY
return ((etty.main.c_oflag & TABDLY) != TAB3);
#else /* not TABDLY */
return 1;
#endif /* not TABDLY */
#else /* DOS_NT */
return 0;
#endif /* DOS_NT */
}
/* Discard echoing. */
void
suppress_echo_on_tty (int fd)
{
struct emacs_tty etty;
emacs_get_tty (fd, &etty);
#ifdef DOS_NT
/* Set raw input mode. */
etty.main = 0;
#else
etty.main.c_lflag &= ~ICANON; /* Disable buffering */
etty.main.c_lflag &= ~ECHO; /* Disable echoing */
#endif /* ! WINDOWSNT */
emacs_set_tty (fd, &etty, 0);
}
/* Get terminal size from system.
Store number of lines into *HEIGHTP and width into *WIDTHP.
We store 0 if there's no valid information. */
void
get_tty_size (int fd, int *widthp, int *heightp)
{
#if defined TIOCGWINSZ
/* BSD-style. */
struct winsize size;
if (ioctl (fd, TIOCGWINSZ, &size) == -1)
*widthp = *heightp = 0;
else
{
*widthp = size.ws_col;
*heightp = size.ws_row;
}
#elif defined TIOCGSIZE
/* SunOS - style. */
struct ttysize size;
if (ioctl (fd, TIOCGSIZE, &size) == -1)
*widthp = *heightp = 0;
else
{
*widthp = size.ts_cols;
*heightp = size.ts_lines;
}
#elif defined WINDOWSNT
CONSOLE_SCREEN_BUFFER_INFO info;
if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE), &info))
{
*widthp = info.srWindow.Right - info.srWindow.Left + 1;
*heightp = info.srWindow.Bottom - info.srWindow.Top + 1;
}
else
*widthp = *heightp = 0;
#elif defined MSDOS
*widthp = ScreenCols ();
*heightp = ScreenRows ();
#else /* system doesn't know size */
*widthp = 0;
*heightp = 0;
#endif
}
/* Set the logical window size associated with descriptor FD
to HEIGHT and WIDTH. This is used mainly with ptys.
Return a negative value on failure. */
int
set_window_size (int fd, int height, int width)
{
#ifdef TIOCSWINSZ
/* BSD-style. */
struct winsize size;
memset (&size, 0, sizeof (size));
size.ws_row = height;
size.ws_col = width;
return ioctl (fd, TIOCSWINSZ, &size);
#else
#ifdef TIOCSSIZE
/* SunOS - style. */
struct ttysize size;
memset (&size, 0, sizeof (size));
size.ts_lines = height;
size.ts_cols = width;
return ioctl (fd, TIOCGSIZE, &size);
#else
return -1;
#endif /* not SunOS-style */
#endif /* not BSD-style */
}
/* Prepare all terminal devices for exiting Emacs. */
void
reset_all_sys_modes (void)
{
struct tty_display_info *tty;
for (tty = tty_list; tty; tty = tty->next)
reset_sys_modes (tty);
}
/* Prepare the terminal for closing it; move the cursor to the
bottom of the frame, turn off interrupt-driven I/O, etc. */
void
reset_sys_modes (struct tty_display_info *tty_out)
{
if (noninteractive)
{
fflush (stdout);
return;
}
#ifndef HAVE_ANDROID
if (!tty_out->term_initted)
return;
if (!tty_out->output)
return; /* The tty is suspended. */
/* Go to and clear the last line of the terminal. */
cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
/* Code adapted from tty_clear_end_of_line. */
if (tty_out->TS_clr_line)
{
emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
}
else
{ /* have to do it the hard way */
tty_turn_off_insert (tty_out);
for (int i = cursorX (tty_out); i < FrameCols (tty_out) - 1; i++)
putc (' ', tty_out->output);
}
cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
fflush (tty_out->output);
if (tty_out->terminal->reset_terminal_modes_hook)
tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal);
/* Avoid possible loss of output when changing terminal modes. */
while (tcdrain (fileno (tty_out->output)) != 0 && errno == EINTR)
continue;
#ifndef DOS_NT
# ifdef F_SETOWN
if (interrupt_input)
{
reset_sigio (fileno (tty_out->input));
fcntl (fileno (tty_out->input), F_SETOWN,
old_fcntl_owner[fileno (tty_out->input)]);
}
# endif /* F_SETOWN */
fcntl (fileno (tty_out->input), F_SETFL,
fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NONBLOCK);
#endif
if (tty_out->old_tty)
while (emacs_set_tty (fileno (tty_out->input),
tty_out->old_tty, 0) < 0 && errno == EINTR)
;
#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
dos_ttcooked ();
#endif
widen_foreground_group (fileno (tty_out->input));
#endif
}
#ifdef HAVE_PTYS
/* Set up the proper status flags for use of a pty. */
void
setup_pty (int fd)
{
/* I'm told that TOICREMOTE does not mean control chars
"can't be sent" but rather that they don't have
input-editing or signaling effects.
That should be good, because we have other ways
to do those things in Emacs.
However, telnet mode seems not to work on 4.2.
So TIOCREMOTE is turned off now. */
/* Under hp-ux, if TIOCREMOTE is turned on, some calls
will hang. In particular, the "timeout" feature (which
causes a read to return if there is no data available)
does this. Also it is known that telnet mode will hang
in such a way that Emacs must be stopped (perhaps this
is the same problem).
If TIOCREMOTE is turned off, then there is a bug in
hp-ux which sometimes loses data. Apparently the
code which blocks the master process when the internal
buffer fills up does not work. Other than this,
though, everything else seems to work fine.
Since the latter lossage is more benign, we may as well
lose that way. -- cph */
#ifdef FIONBIO
#if defined (UNIX98_PTYS)
{
int on = 1;
ioctl (fd, FIONBIO, &on);
}
#endif
#endif
}
#endif /* HAVE_PTYS */
void
init_system_name (void)
{
if (!build_details)
{
/* Set system-name to nil so that the build is deterministic. */
Vsystem_name = Qnil;
return;
}
char *hostname_alloc = NULL;
char *hostname;
#ifndef HAVE_GETHOSTNAME
struct utsname uts;
uname (&uts);
hostname = uts.nodename;
#else /* HAVE_GETHOSTNAME */
char hostname_buf[256];
ptrdiff_t hostname_size = sizeof hostname_buf;
hostname = hostname_buf;
/* Try to get the host name; if the buffer is too short, try
again. Apparently, the only indication gethostname gives of
whether the buffer was large enough is the presence or absence
of a '\0' in the string. Eech. */
for (;;)
{
gethostname (hostname, hostname_size - 1);
hostname[hostname_size - 1] = '\0';
/* Was the buffer large enough for the '\0'? */
if (strlen (hostname) < hostname_size - 1)
break;
hostname = hostname_alloc = xpalloc (hostname_alloc, &hostname_size, 1,
min (PTRDIFF_MAX, SIZE_MAX), 1);
}
#endif /* HAVE_GETHOSTNAME */
char *p;
for (p = hostname; *p; p++)
if (*p == ' ' || *p == '\t')
*p = '-';
if (! (STRINGP (Vsystem_name) && SBYTES (Vsystem_name) == p - hostname
&& strcmp (SSDATA (Vsystem_name), hostname) == 0))
Vsystem_name = build_string (hostname);
xfree (hostname_alloc);
}
sigset_t empty_mask;
static struct sigaction process_fatal_action;
static int
emacs_sigaction_flags (void)
{
#ifdef SA_RESTART
/* SA_RESTART causes interruptible functions with timeouts (e.g.,
'select') to reset their timeout on some platforms (e.g.,
HP-UX 11), which is not what we want. Also, when Emacs is
interactive, we don't want SA_RESTART because we need to poll
for pending input so we need long-running syscalls to be interrupted
after a signal that sets pending_signals.
Non-interactive keyboard input goes through stdio, where we
always want restartable system calls. */
if (noninteractive)
return SA_RESTART;
#endif
return 0;
}
/* Store into *ACTION a signal action suitable for Emacs, with handler
HANDLER. */
void
emacs_sigaction_init (struct sigaction *action, signal_handler_t handler)
{
sigemptyset (&action->sa_mask);
/* When handling a signal, block nonfatal system signals that are caught
by Emacs. This makes race conditions less likely. */
sigaddset (&action->sa_mask, SIGALRM);
#ifdef SIGCHLD
sigaddset (&action->sa_mask, SIGCHLD);
#endif
#ifdef SIGDANGER
sigaddset (&action->sa_mask, SIGDANGER);
#endif
#ifdef PROFILER_CPU_SUPPORT
sigaddset (&action->sa_mask, SIGPROF);
#endif
#ifdef SIGWINCH
sigaddset (&action->sa_mask, SIGWINCH);
#endif
if (! noninteractive)
{
sigaddset (&action->sa_mask, SIGINT);
sigaddset (&action->sa_mask, SIGQUIT);
#ifdef USABLE_SIGIO
sigaddset (&action->sa_mask, SIGIO);
#elif defined (USABLE_SIGPOLL)
sigaddset (&action->sa_mask, SIGPOLL);
#endif
}
action->sa_handler = handler;
action->sa_flags = emacs_sigaction_flags ();
}
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
static pthread_t main_thread_id;
#endif
/* SIG has arrived at the current process. Deliver it to the main
thread, which should handle it with HANDLER. (Delivering the
signal to some other thread might not work if the other thread is
about to exit.)
If we are on the main thread, handle the signal SIG with HANDLER.
Otherwise, redirect the signal to the main thread, blocking it from
this thread. POSIX says any thread can receive a signal that is
associated with a process, process group, or asynchronous event.
On GNU/Linux the main thread typically gets a process signal unless
it's blocked, but other systems (FreeBSD at least) can deliver the
signal to other threads. */
void
deliver_process_signal (int sig, signal_handler_t handler)
{
/* Preserve errno, to avoid race conditions with signal handlers that
might change errno. Races can occur even in single-threaded hosts. */
int old_errno = errno;
bool on_main_thread = true;
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
if (! pthread_equal (pthread_self (), main_thread_id))
{
sigset_t blocked;
sigemptyset (&blocked);
sigaddset (&blocked, sig);
pthread_sigmask (SIG_BLOCK, &blocked, 0);
pthread_kill (main_thread_id, sig);
on_main_thread = false;
}
#endif
if (on_main_thread)
handler (sig);
errno = old_errno;
}
/* Static location to save a fatal backtrace in a thread.
FIXME: If two subsidiary threads fail simultaneously, the resulting
backtrace may be garbage. */
enum { BACKTRACE_LIMIT_MAX = 500 };
static void *thread_backtrace_buffer[BACKTRACE_LIMIT_MAX + 1];
static int thread_backtrace_npointers;
/* SIG has arrived at the current thread.
If we are on the main thread, handle the signal SIG with HANDLER.
Otherwise, this is a fatal error in the handling thread. */
static void
deliver_thread_signal (int sig, signal_handler_t handler)
{
int old_errno = errno;
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
if (! pthread_equal (pthread_self (), main_thread_id))
{
thread_backtrace_npointers
= backtrace (thread_backtrace_buffer, BACKTRACE_LIMIT_MAX);
sigaction (sig, &process_fatal_action, 0);
pthread_kill (main_thread_id, sig);
/* Avoid further damage while the main thread is exiting. */
while (1)
sigsuspend (&empty_mask);
}
#endif
handler (sig);
errno = old_errno;
}
/* Handle bus errors, invalid instruction, etc. */
static void
handle_fatal_signal (int sig)
{
terminate_due_to_signal (sig, 40);
}
static void
deliver_fatal_signal (int sig)
{
deliver_process_signal (sig, handle_fatal_signal);
}
static void
deliver_fatal_thread_signal (int sig)
{
deliver_thread_signal (sig, handle_fatal_signal);
}
static AVOID
handle_arith_signal (int sig)
{
pthread_sigmask (SIG_SETMASK, &empty_mask, 0);
xsignal0 (Qarith_error);
}
#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY && defined HAVE_MMAP
static void
handle_sigbus (int sig, siginfo_t *siginfo, void *arg)
{
/* If this arrives during sfntfont_open, then Emacs may be
screwed. */
if (sfntfont_detect_sigbus (siginfo->si_addr))
return;
handle_fatal_signal (sig);
}
/* Try to set up SIGBUS handling for the sfnt font driver.
Value is 1 upon failure, 0 otherwise. */
static int
init_sigbus (void)
{
struct sigaction sa;
sigfillset (&sa.sa_mask);
sa.sa_sigaction = handle_sigbus;
sa.sa_flags = SA_SIGINFO;
if (sigaction (SIGBUS, &sa, NULL))
return 1;
return 0;
}
#endif
#if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
/* Alternate stack used by SIGSEGV handler below. */
/* Storage for the alternate signal stack.
64 KiB is not too large for Emacs, and is large enough
for all known platforms. Smaller sizes may run into trouble.
For example, libsigsegv 2.6 through 2.8 have a bug where some
architectures use more than the Linux default of an 8 KiB alternate
stack when deciding if a fault was caused by stack overflow. */
static max_align_t sigsegv_stack[(64 * 1024
+ sizeof (max_align_t) - 1)
/ sizeof (max_align_t)];
/* Return true if SIGINFO indicates a stack overflow. */
static bool
stack_overflow (siginfo_t *siginfo)
{
if (!attempt_stack_overflow_recovery)
return false;
/* In theory, a more-accurate heuristic can be obtained by using
GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
and pthread_attr_getguardsize to find the location and size of the
guard area. In practice, though, these functions are so hard to
use reliably that they're not worth bothering with. E.g., see:
https://sourceware.org/bugzilla/show_bug.cgi?id=16291
Other operating systems also have problems, e.g., Solaris's
stack_violation function is tailor-made for this problem, but it
doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
GNU libsigsegv is overkill for Emacs; otherwise it might be a
candidate here. */
if (!siginfo)
return false;
/* The faulting address. */
char *addr = siginfo->si_addr;
if (!addr)
return false;
/* The known top and bottom of the stack. The actual stack may
extend a bit beyond these boundaries. */
char const *bot = stack_bottom;
char const *top = current_thread->stack_top;
/* Log base 2 of the stack heuristic ratio. This ratio is the size
of the known stack divided by the size of the guard area past the
end of the stack top. The heuristic is that a bad address is
considered to be a stack overflow if it occurs within
stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
stack. This heuristic is not exactly correct but it's good
enough in practice. */
enum { LG_STACK_HEURISTIC = 8 };
if (bot < top)
return 0 <= addr - top && addr - top < (top - bot) >> LG_STACK_HEURISTIC;
else
return 0 <= top - addr && top - addr < (bot - top) >> LG_STACK_HEURISTIC;
}
/* Signal handler for SIGSEGV before our new handler was installed. */
static struct sigaction old_sigsegv_handler;
/* Attempt to recover from SIGSEGV caused by C stack overflow. */
static void
handle_sigsegv (int sig, siginfo_t *siginfo, void *arg)
{
/* Hard GC error may lead to stack overflow caused by
too nested calls to mark_object. No way to survive. */
bool fatal = gc_in_progress;
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
if (!fatal && !pthread_equal (pthread_self (), main_thread_id))
fatal = true;
#endif
if (!fatal && stack_overflow (siginfo))
siglongjmp (return_to_command_loop, 1);
#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY
/* Tombstones (crash reports with stack traces) won't be generated on
Android unless the original SIGSEGV handler is installed and the
signal is resent, such as by returning from the first signal
handler called. */
sigaction (SIGSEGV, &old_sigsegv_handler, NULL);
return;
#endif /* HAVE_ANDROID && ANDROID_STUBIFY */
/* Otherwise we can't do anything with this. */
deliver_fatal_thread_signal (sig);
}
/* Return true if we have successfully set up SIGSEGV handler on alternate
stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
static bool
init_sigsegv (void)
{
struct sigaction sa;
stack_t ss;
ss.ss_sp = sigsegv_stack;
ss.ss_size = sizeof (sigsegv_stack);
ss.ss_flags = 0;
if (sigaltstack (&ss, NULL) < 0)
return 0;
sigfillset (&sa.sa_mask);
sa.sa_sigaction = handle_sigsegv;
sa.sa_flags = SA_SIGINFO | SA_ONSTACK | emacs_sigaction_flags ();
if (sigaction (SIGSEGV, &sa, &old_sigsegv_handler) < 0)
return 0;
return 1;
}
#else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
static bool
init_sigsegv (void)
{
return 0;
}
#endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
static void
deliver_arith_signal (int sig)
{
deliver_thread_signal (sig, handle_arith_signal);
}
#ifdef SIGDANGER
/* Handler for SIGDANGER. */
static void
handle_danger_signal (int sig)
{
malloc_warning ("Operating system warns that virtual memory is running low.\n");
/* It might be unsafe to call do_auto_save now. */
force_auto_save_soon ();
}
static void
deliver_danger_signal (int sig)
{
deliver_process_signal (sig, handle_danger_signal);
}
#endif
/* Treat SIG as a terminating signal, unless it is already ignored and
we are in --batch mode. Among other things, this makes nohup work. */
static void
maybe_fatal_sig (int sig)
{
bool catch_sig = !noninteractive;
if (!catch_sig)
{
struct sigaction old_action;
sigaction (sig, 0, &old_action);
catch_sig = old_action.sa_handler != SIG_IGN;
}
if (catch_sig)
sigaction (sig, &process_fatal_action, 0);
}
void
init_signals (void)
{
struct sigaction thread_fatal_action;
struct sigaction action;
sigemptyset (&empty_mask);
#ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
main_thread_id = pthread_self ();
#endif
/* Don't alter signal handlers if dumping with unexec. On some
machines, changing signal handlers sets static data that would make
signals fail to work right when the dumped Emacs is run. */
if (will_dump_with_unexec_p ())
return;
sigfillset (&process_fatal_action.sa_mask);
process_fatal_action.sa_handler = deliver_fatal_signal;
process_fatal_action.sa_flags = emacs_sigaction_flags ();
sigfillset (&thread_fatal_action.sa_mask);
thread_fatal_action.sa_handler = deliver_fatal_thread_signal;
thread_fatal_action.sa_flags = process_fatal_action.sa_flags;
/* SIGINT may need special treatment on MS-Windows. See
https://lists.gnu.org/r/emacs-devel/2010-09/msg01062.html
Please update the doc of kill-emacs, kill-emacs-hook, and
NEWS if you change this. */
maybe_fatal_sig (SIGHUP);
maybe_fatal_sig (SIGINT);
maybe_fatal_sig (SIGTERM);
/* Emacs checks for write errors, so it can safely ignore SIGPIPE.
However, in batch mode leave SIGPIPE alone, as that causes Emacs
to behave more like typical batch applications do. */
if (! noninteractive)
signal (SIGPIPE, SIG_IGN);
sigaction (SIGQUIT, &process_fatal_action, 0);
#ifndef __vax__
sigaction (SIGILL, &thread_fatal_action, 0);
#endif /* __vax__ */
sigaction (SIGTRAP, &thread_fatal_action, 0);
/* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
But on a non-IEEE host SIGFPE can come from a trap in the Lisp
interpreter's floating point operations, so treat SIGFPE as an
arith-error if it arises in the main thread. */
if (IEEE_FLOATING_POINT)
sigaction (SIGFPE, &thread_fatal_action, 0);
else
{
emacs_sigaction_init (&action, deliver_arith_signal);
sigaction (SIGFPE, &action, 0);
#ifdef __vax__
/* NetBSD/vax generates SIGILL upon some floating point errors,
such as taking the log of 0.0. */
sigaction (SIGILL, &action, 0);
#endif /* __vax__ */
}
/* SIGUSR1 and SIGUSR2 are used internally by the android_select
function. */
#if !defined HAVE_ANDROID
#ifdef SIGUSR1
add_user_signal (SIGUSR1, "sigusr1");
#endif
#ifdef SIGUSR2
add_user_signal (SIGUSR2, "sigusr2");
#endif
#endif
sigaction (SIGABRT, &thread_fatal_action, 0);
#ifdef SIGPRE
sigaction (SIGPRE, &thread_fatal_action, 0);
#endif
#ifdef SIGORE
sigaction (SIGORE, &thread_fatal_action, 0);
#endif
#ifdef SIGUME
sigaction (SIGUME, &thread_fatal_action, 0);
#endif
#ifdef SIGDLK
sigaction (SIGDLK, &process_fatal_action, 0);
#endif
#ifdef SIGCPULIM
sigaction (SIGCPULIM, &process_fatal_action, 0);
#endif
#ifdef SIGIOT
sigaction (SIGIOT, &thread_fatal_action, 0);
#endif
#ifdef SIGEMT
sigaction (SIGEMT, &thread_fatal_action, 0);
#endif
#ifdef SIGBUS
#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY && defined HAVE_MMAP
if (init_sigbus ())
#endif
sigaction (SIGBUS, &thread_fatal_action, 0);
#endif
if (!init_sigsegv ())
sigaction (SIGSEGV, &thread_fatal_action, 0);
#ifdef SIGSYS
sigaction (SIGSYS, &thread_fatal_action, 0);
#endif
sigaction (SIGTERM, &process_fatal_action, 0);
#ifdef SIGPROF
signal (SIGPROF, SIG_IGN);
#endif
#ifdef SIGVTALRM
sigaction (SIGVTALRM, &process_fatal_action, 0);
#endif
#ifdef SIGXCPU
sigaction (SIGXCPU, &process_fatal_action, 0);
#endif
#ifdef SIGXFSZ
sigaction (SIGXFSZ, &process_fatal_action, 0);
#endif
#ifdef SIGDANGER
/* This just means available memory is getting low. */
emacs_sigaction_init (&action, deliver_danger_signal);
sigaction (SIGDANGER, &action, 0);
#endif
/* AIX-specific signals. */
#ifdef SIGGRANT
sigaction (SIGGRANT, &process_fatal_action, 0);
#endif
#ifdef SIGMIGRATE
sigaction (SIGMIGRATE, &process_fatal_action, 0);
#endif
#ifdef SIGMSG
sigaction (SIGMSG, &process_fatal_action, 0);
#endif
#ifdef SIGRETRACT
sigaction (SIGRETRACT, &process_fatal_action, 0);
#endif
#ifdef SIGSAK
sigaction (SIGSAK, &process_fatal_action, 0);
#endif
#ifdef SIGSOUND
sigaction (SIGSOUND, &process_fatal_action, 0);
#endif
#ifdef SIGTALRM
sigaction (SIGTALRM, &thread_fatal_action, 0);
#endif
}
#ifndef HAVE_RANDOM
#ifdef random
#define HAVE_RANDOM
#endif
#endif
/* Figure out how many bits the system's random number generator uses.
`random' and `lrand48' are assumed to return 31 usable bits.
BSD `rand' returns a 31 bit value but the low order bits are unusable;
so we'll shift it and treat it like the 15-bit USG `rand'. */
#ifndef RAND_BITS
# ifdef HAVE_RANDOM
# define RAND_BITS 31
# else /* !HAVE_RANDOM */
# ifdef HAVE_LRAND48
# define RAND_BITS 31
# define random lrand48
# else /* !HAVE_LRAND48 */
# define RAND_BITS 15
# if RAND_MAX == 32767
# define random rand
# else /* RAND_MAX != 32767 */
# if RAND_MAX == 2147483647
# define random() (rand () >> 16)
# else /* RAND_MAX != 2147483647 */
# ifdef USG
# define random rand
# else
# define random() (rand () >> 16)
# endif /* !USG */
# endif /* RAND_MAX != 2147483647 */
# endif /* RAND_MAX != 32767 */
# endif /* !HAVE_LRAND48 */
# endif /* !HAVE_RANDOM */
#endif /* !RAND_BITS */
#ifdef HAVE_RANDOM
typedef unsigned int random_seed;
static void set_random_seed (random_seed arg) { srandom (arg); }
#elif defined HAVE_LRAND48
typedef long int random_seed;
static void set_random_seed (random_seed arg) { srand48 (arg); }
#else
typedef unsigned int random_seed;
static void set_random_seed (random_seed arg) { srand (arg); }
#endif
void
seed_random (void *seed, ptrdiff_t seed_size)
{
random_seed arg = 0;
unsigned char *argp = (unsigned char *) &arg;
unsigned char *seedp = seed;
for (ptrdiff_t i = 0; i < seed_size; i++)
argp[i % sizeof arg] ^= seedp[i];
set_random_seed (arg);
}
void
init_random (void)
{
random_seed v;
bool success = false;
/* First, try seeding the PRNG from the operating system's entropy
source. This approach is both fast and secure. */
#ifdef WINDOWSNT
/* FIXME: Perhaps getrandom can be used here too? */
success = w32_init_random (&v, sizeof v) == 0;
#else
verify (sizeof v <= 256);
success = getrandom (&v, sizeof v, 0) == sizeof v;
#endif
/* If that didn't work, just use the current time value and PID.
It's at least better than XKCD 221. */
if (!success)
{
struct timespec t = current_timespec ();
v = getpid () ^ t.tv_sec ^ t.tv_nsec;
}
set_random_seed (v);
}
/*
* Return a nonnegative random integer out of whatever we've got.
* It contains enough bits to make a random (signed) Emacs fixnum.
* This suffices even for a 64-bit architecture with a 15-bit rand.
*/
EMACS_INT
get_random (void)
{
EMACS_UINT val = 0;
int i;
for (i = 0; i < (FIXNUM_BITS + RAND_BITS - 1) / RAND_BITS; i++)
val = (random () ^ (val << RAND_BITS)
^ (val >> (EMACS_INT_WIDTH - RAND_BITS)));
val ^= val >> (EMACS_INT_WIDTH - FIXNUM_BITS);
return val & INTMASK;
}
/* Return a random unsigned long. */
unsigned long int
get_random_ulong (void)
{
unsigned long int r = 0;
for (int i = 0; i < (ULONG_WIDTH + RAND_BITS - 1) / RAND_BITS; i++)
r = random () ^ (r << RAND_BITS) ^ (r >> (ULONG_WIDTH - RAND_BITS));
return r;
}
#ifndef HAVE_SNPRINTF
/* Approximate snprintf as best we can on ancient hosts that lack it. */
int
snprintf (char *buf, size_t bufsize, char const *format, ...)
{
ptrdiff_t size = min (bufsize, PTRDIFF_MAX);
ptrdiff_t nbytes = size - 1;
va_list ap;
if (size)
{
va_start (ap, format);
nbytes = doprnt (buf, size, format, 0, ap);
va_end (ap);
}
if (nbytes == size - 1)
{
/* Calculate the length of the string that would have been created
had the buffer been large enough. */
char stackbuf[4000];
char *b = stackbuf;
ptrdiff_t bsize = sizeof stackbuf;
va_start (ap, format);
nbytes = evxprintf (&b, &bsize, stackbuf, -1, format, ap);
va_end (ap);
if (b != stackbuf)
xfree (b);
}
if (INT_MAX < nbytes)
{
#ifdef EOVERFLOW
errno = EOVERFLOW;
#else
errno = EDOM;
#endif
return -1;
}
return nbytes;
}
#endif
/* If a backtrace is available, output the top lines of it to stderr.
Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
This function may be called from a signal handler, so it should
not invoke async-unsafe functions like malloc.
If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
but do not output anything. This avoids some problems that can
otherwise occur if the malloc arena is corrupted before 'backtrace'
is called, since 'backtrace' may call malloc if the tables are not
initialized.
If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
fatal error has occurred in some other thread; generate a thread
backtrace instead, ignoring BACKTRACE_LIMIT. */
void
emacs_backtrace (int backtrace_limit)
{
void *main_backtrace_buffer[BACKTRACE_LIMIT_MAX + 1];
int bounded_limit = min (backtrace_limit, BACKTRACE_LIMIT_MAX);
void *buffer;
int npointers;
if (thread_backtrace_npointers)
{
buffer = thread_backtrace_buffer;
npointers = thread_backtrace_npointers;
}
else
{
buffer = main_backtrace_buffer;
/* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
if (bounded_limit < 0)
{
backtrace (buffer, 1);
return;
}
npointers = backtrace (buffer, bounded_limit + 1);
}
if (npointers)
{
emacs_write (STDERR_FILENO, "Backtrace:\n", 11);
backtrace_symbols_fd (buffer, npointers, STDERR_FILENO);
if (bounded_limit < npointers)
emacs_write (STDERR_FILENO, "...\n", 4);
}
}
#if !defined HAVE_NTGUI && !(defined HAVE_ANDROID \
&& !defined ANDROID_STUBIFY)
void
emacs_abort (void)
{
terminate_due_to_signal (SIGABRT, 40);
}
#endif
/* Assuming the directory DIRFD, store information about FILENAME into *ST,
using FLAGS to control how the status is obtained.
Do not fail merely because fetching info was interrupted by a signal.
Allow the user to quit.
The type of ST is void * instead of struct stat * because the
latter type would be problematic in lisp.h. Some platforms may
play tricks like "#define stat stat64" in <sys/stat.h>, and lisp.h
does not include <sys/stat.h>. */
int
emacs_fstatat (int dirfd, char const *filename, void *st, int flags)
{
int r;
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
while ((r = fstatat (dirfd, filename, st, flags)) != 0
&& errno == EINTR)
maybe_quit ();
#else
while ((r = android_fstatat (dirfd, filename, st, flags)) != 0
&& errno == EINTR)
maybe_quit ();
#endif
return r;
}
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
static int
sys_openat (int dirfd, char const *file, int oflags, int mode)
{
#ifdef O_PATH
return openat (dirfd, file, oflags, mode);
#else
/* On platforms without O_PATH, emacs_openat's callers arrange for
DIRFD to be AT_FDCWD, so it should be safe to just call 'open'.
This ports to old platforms like OS X 10.9 that lack openat. */
eassert (dirfd == AT_FDCWD);
return open (file, oflags, mode);
#endif
}
#endif
int
sys_fstat (int fd, struct stat *statb)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return fstat (fd, statb);
#else
return android_fstat (fd, statb);
#endif
}
int
sys_faccessat (int fd, const char *pathname, int mode, int flags)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return faccessat (fd, pathname, mode, flags);
#else
return android_faccessat (fd, pathname, mode, flags);
#endif
}
/* Assuming the directory DIRFD, open FILE for Emacs use,
using open flags OFLAGS and mode MODE.
Use binary I/O on systems that care about text vs binary I/O.
Arrange for subprograms to not inherit the file descriptor.
Prefer a method that is multithread-safe, if available.
Do not fail merely because the open was interrupted by a signal.
Allow the user to quit. */
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
int
emacs_openat (int dirfd, char const *file, int oflags, int mode)
{
int fd;
if (! (oflags & O_TEXT))
oflags |= O_BINARY;
oflags |= O_CLOEXEC;
while ((fd = sys_openat (dirfd, file, oflags, mode)) < 0 && errno == EINTR)
maybe_quit ();
return fd;
}
#endif
int
emacs_open (char const *file, int oflags, int mode)
{
#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY
int fd;
#endif
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return emacs_openat (AT_FDCWD, file, oflags, mode);
#else
while ((fd = android_open (file, oflags, mode)) < 0 && errno == EINTR)
maybe_quit ();
return fd;
#endif
}
/* Same as above, but doesn't allow the user to quit. */
int
emacs_open_noquit (char const *file, int oflags, int mode)
{
int fd;
if (! (oflags & O_TEXT))
oflags |= O_BINARY;
oflags |= O_CLOEXEC;
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
do
fd = open (file, oflags, mode);
while (fd < 0 && errno == EINTR);
#else
do
fd = android_open (file, oflags, mode);
while (fd < 0 && errno == EINTR);
#endif
return fd;
}
/* Open FILE as a stream for Emacs use, with mode MODE.
Act like emacs_open with respect to threads, signals, and quits. */
FILE *
emacs_fopen (char const *file, char const *mode)
{
int fd, omode, oflags;
int bflag = 0;
char const *m = mode;
switch (*m++)
{
case 'r': omode = O_RDONLY; oflags = 0; break;
case 'w': omode = O_WRONLY; oflags = O_CREAT | O_TRUNC; break;
case 'a': omode = O_WRONLY; oflags = O_CREAT | O_APPEND; break;
default: emacs_abort ();
}
while (*m)
switch (*m++)
{
case '+': omode = O_RDWR; break;
case 't': bflag = O_TEXT; break;
default: /* Ignore. */ break;
}
fd = emacs_open (file, omode | oflags | bflag, 0666);
return fd < 0 ? 0 : emacs_fdopen (fd, mode);
}
/* Create a pipe for Emacs use. */
int
emacs_pipe (int fd[2])
{
#ifdef MSDOS
return pipe (fd);
#else /* !MSDOS */
return pipe2 (fd, O_BINARY | O_CLOEXEC);
#endif /* !MSDOS */
}
/* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
For the background behind this mess, please see Austin Group defect 529
<https://austingroupbugs.net/view.php?id=529>. */
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
#ifndef POSIX_CLOSE_RESTART
# define POSIX_CLOSE_RESTART 1
static int
posix_close (int fd, int flag)
{
/* Only the POSIX_CLOSE_RESTART case is emulated. */
eassert (flag == POSIX_CLOSE_RESTART);
/* Things are tricky if close (fd) returns -1 with errno == EINTR
on a system that does not define POSIX_CLOSE_RESTART.
In this case, in some systems (e.g., GNU/Linux, AIX) FD is
closed, and retrying the close could inadvertently close a file
descriptor allocated by some other thread. In other systems
(e.g., HP/UX) FD is not closed. And in still other systems
(e.g., macOS, Solaris), maybe FD is closed, maybe not, and in a
multithreaded program there can be no way to tell.
So, in this case, pretend that the close succeeded. This works
well on systems like GNU/Linux that close FD. Although it may
leak a file descriptor on other systems, the leak is unlikely and
it's better to leak than to close a random victim. */
return close (fd) == 0 || errno == EINTR ? 0 : -1;
}
#endif
#endif
/* Close FD, retrying if interrupted. If successful, return 0;
otherwise, return -1 and set errno to a non-EINTR value. Consider
an EINPROGRESS error to be successful, as that's merely a signal
arriving. FD is always closed when this function returns, even
when it returns -1.
Do not call this function if FD is nonnegative and might already be closed,
as that might close an innocent victim opened by some other thread. */
int
emacs_close (int fd)
{
int r;
while (1)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
r = posix_close (fd, POSIX_CLOSE_RESTART);
#else
r = android_close (fd) == 0 || errno == EINTR ? 0 : -1;
#define POSIX_CLOSE_RESTART 1
#endif
if (r == 0)
return r;
if (!POSIX_CLOSE_RESTART || errno != EINTR)
{
eassert (errno != EBADF || fd < 0);
return errno == EINPROGRESS ? 0 : r;
}
}
}
/* Wrapper around fdopen. On Android, this calls `android_fclose' to
clear information associated with FD if necessary. */
FILE *
emacs_fdopen (int fd, const char *mode)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return fdopen (fd, mode);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_fdopen (fd, mode);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
/* Wrapper around fclose. On Android, this calls `android_fclose' to
clear information associated with the FILE's file descriptor if
necessary. */
#if defined HAVE_ANDROID && !defined ANDROID_STUBIFY
int
emacs_fclose (FILE *stream)
{
return android_fclose (stream);
}
#endif
/* Wrappers around unlink, symlink, rename, renameat_noreplace, and
rmdir. These operations handle asset and content directories on
Android, and may return EINTR. */
int
emacs_unlink (const char *name)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return unlink (name);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_unlink (name);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
int
emacs_symlink (const char *target, const char *linkname)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return symlink (target, linkname);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_symlink (target, linkname);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
int
emacs_rmdir (const char *dirname)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return rmdir (dirname);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_rmdir (dirname);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
int
emacs_mkdir (const char *dirname, mode_t mode)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return mkdir (dirname, mode);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_mkdir (dirname, mode);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
int
emacs_renameat_noreplace (int srcfd, const char *src,
int dstfd, const char *dst)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return renameat_noreplace (srcfd, src, dstfd, dst);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_renameat_noreplace (srcfd, src, dstfd, dst);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
int
emacs_rename (const char *src, const char *dst)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return rename (src, dst);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_rename (src, dst);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
int
emacs_fchmodat (int fd, const char *path, mode_t mode, int flags)
{
#if !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY)
return fchmodat (fd, path, mode, flags);
#else /* !defined HAVE_ANDROID || defined ANDROID_STUBIFY */
return android_fchmodat (fd, path, mode, flags);
#endif /* !(defined HAVE_ANDROID && !defined ANDROID_STUBIFY) */
}
/* Maximum number of bytes to read or write in a single system call.
This works around a serious bug in Linux kernels before 2.6.16; see
<https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
It's likely to work around similar bugs in other operating systems, so do it
on all platforms. Round INT_MAX down to a page size, with the conservative
assumption that page sizes are at most 2**18 bytes (any kernel with a
page size larger than that shouldn't have the bug). */
#ifndef MAX_RW_COUNT
#define MAX_RW_COUNT (INT_MAX >> 18 << 18)
#endif
/* Verify that MAX_RW_COUNT fits in the relevant standard types. */
#ifndef SSIZE_MAX
# define SSIZE_MAX TYPE_MAXIMUM (ssize_t)
#endif
verify (MAX_RW_COUNT <= PTRDIFF_MAX);
verify (MAX_RW_COUNT <= SIZE_MAX);
verify (MAX_RW_COUNT <= SSIZE_MAX);
#ifdef WINDOWSNT
/* Verify that Emacs read requests cannot cause trouble, even in
64-bit builds. The last argument of 'read' is 'unsigned int', and
the return value's type (see 'sys_read') is 'int'. */
verify (MAX_RW_COUNT <= INT_MAX);
verify (MAX_RW_COUNT <= UINT_MAX);
#endif
/* Read from FD to a buffer BUF with size NBYTE.
If interrupted, process any quits and pending signals immediately
if INTERRUPTIBLE, and then retry the read unless quitting.
Return the number of bytes read, which might be less than NBYTE.
On error, set errno to a value other than EINTR, and return -1. */
static ptrdiff_t
emacs_intr_read (int fd, void *buf, ptrdiff_t nbyte, bool interruptible)
{
/* No caller should ever pass a too-large size to emacs_read. */
eassert (nbyte <= MAX_RW_COUNT);
ssize_t result;
do
{
if (interruptible)
maybe_quit ();
result = read (fd, buf, nbyte);
}
while (result < 0 && errno == EINTR);
return result;
}
/* Read from FD to a buffer BUF with size NBYTE.
If interrupted, retry the read. Return the number of bytes read,
which might be less than NBYTE. On error, set errno to a value
other than EINTR, and return -1. */
ptrdiff_t
emacs_read (int fd, void *buf, ptrdiff_t nbyte)
{
return emacs_intr_read (fd, buf, nbyte, false);
}
/* Like emacs_read, but also process quits and pending signals. */
ptrdiff_t
emacs_read_quit (int fd, void *buf, ptrdiff_t nbyte)
{
return emacs_intr_read (fd, buf, nbyte, true);
}
/* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
interrupted or if a partial write occurs. Process any quits
immediately if INTERRUPTIBLE is positive, and process any pending
signals immediately if INTERRUPTIBLE is nonzero. Return the number
of bytes written; if this is less than NBYTE, set errno to a value
other than EINTR. */
static ptrdiff_t
emacs_full_write (int fd, char const *buf, ptrdiff_t nbyte,
int interruptible)
{
ptrdiff_t bytes_written = 0;
while (nbyte > 0)
{
ssize_t n = write (fd, buf, min (nbyte, MAX_RW_COUNT));
if (n < 0)
{
if (errno != EINTR)
break;
if (interruptible)
{
if (0 < interruptible)
maybe_quit ();
if (pending_signals)
process_pending_signals ();
}
}
else
{
buf += n;
nbyte -= n;
bytes_written += n;
}
}
return bytes_written;
}
/* Write to FD from a buffer BUF with size NBYTE, retrying if
interrupted or if a partial write occurs. Do not process quits or
pending signals. Return the number of bytes written, setting errno
if this is less than NBYTE. */
ptrdiff_t
emacs_write (int fd, void const *buf, ptrdiff_t nbyte)
{
return emacs_full_write (fd, buf, nbyte, 0);
}
/* Like emacs_write, but also process pending signals. */
ptrdiff_t
emacs_write_sig (int fd, void const *buf, ptrdiff_t nbyte)
{
return emacs_full_write (fd, buf, nbyte, -1);
}
/* Like emacs_write, but also process quits and pending signals. */
ptrdiff_t
emacs_write_quit (int fd, void const *buf, ptrdiff_t nbyte)
{
return emacs_full_write (fd, buf, nbyte, 1);
}
/* Write a diagnostic to standard error that contains MESSAGE and a
string derived from errno. Preserve errno. Do not buffer stderr.
Do not process quits or pending signals if interrupted. */
void
emacs_perror (char const *message)
{
int err = errno;
char const *error_string = emacs_strerror (err);
char const *command = (initial_argv && initial_argv[0]
? initial_argv[0] : "emacs");
/* Write it out all at once, if it's short; this is less likely to
be interleaved with other output. */
char buf[min (PIPE_BUF, MAX_ALLOCA)];
int nbytes = snprintf (buf, sizeof buf, "%s: %s: %s\n",
command, message, error_string);
if (0 <= nbytes && nbytes < sizeof buf)
emacs_write (STDERR_FILENO, buf, nbytes);
else
{
emacs_write (STDERR_FILENO, command, strlen (command));
emacs_write (STDERR_FILENO, ": ", 2);
emacs_write (STDERR_FILENO, message, strlen (message));
emacs_write (STDERR_FILENO, ": ", 2);
emacs_write (STDERR_FILENO, error_string, strlen (error_string));
emacs_write (STDERR_FILENO, "\n", 1);
}
errno = err;
}
/* Rename directory SRCFD's entry SRC to directory DSTFD's entry DST.
This is like renameat except that it fails if DST already exists,
or if this operation is not supported atomically. Return 0 if
successful, -1 (setting errno) otherwise. */
int
renameat_noreplace (int srcfd, char const *src, int dstfd, char const *dst)
{
#if HAVE_RENAMEAT2 && defined RENAME_NOREPLACE
return renameat2 (srcfd, src, dstfd, dst, RENAME_NOREPLACE);
#elif defined SYS_renameat2 && defined RENAME_NOREPLACE
/* Linux kernel 3.15 (2014) or later, with glibc 2.27 (2018) or earlier. */
return syscall (SYS_renameat2, srcfd, src, dstfd, dst, RENAME_NOREPLACE);
#elif defined RENAME_EXCL
return renameatx_np (srcfd, src, dstfd, dst, RENAME_EXCL);
#else
# ifdef WINDOWSNT
if (srcfd == AT_FDCWD && dstfd == AT_FDCWD)
return sys_rename_replace (src, dst, 0);
# endif
errno = ENOSYS;
return -1;
#endif
}
/* Like strsignal, except async-signal-safe, and this function
returns a string in the C locale rather than the current locale. */
char const *
safe_strsignal (int code)
{
char const *signame = sigdescr_np (code);
if (! signame)
signame = "Unknown signal";
return signame;
}
/* Output to stderr. */
/* Return the error output stream. */
static FILE *
errstream (void)
{
FILE *err = buferr;
if (!err)
return stderr;
fflush_unlocked (stderr);
return err;
}
/* These functions are like fputc, vfprintf, and fwrite,
except that they output to stderr and buffer better on
platforms that support line buffering. This avoids interleaving
output when Emacs and other processes write to stderr
simultaneously, so long as the lines are short enough. When a
single diagnostic is emitted via a sequence of calls of one or more
of these functions, the caller should arrange for the last called
function to output a newline at the end. */
void
errputc (int c)
{
fputc_unlocked (c, errstream ());
#ifdef WINDOWSNT
/* Flush stderr after outputting a newline since stderr is fully
buffered when redirected to a pipe, contrary to POSIX. */
if (c == '\n')
fflush_unlocked (stderr);
#endif
}
void
errwrite (void const *buf, ptrdiff_t nbuf)
{
fwrite_unlocked (buf, 1, nbuf, errstream ());
}
/* Close standard output and standard error, reporting any write
errors as best we can. This is intended for use with atexit. */
void
close_output_streams (void)
{
/* Android comes with some kind of ``file descriptor sanitizer''
that aborts when stdout or stderr is closed. (bug#65340)
Perform this unconditionally as long as __ANDROID__ is defined,
since the file descriptor sanitizer also applies to regular TTY
builds under Android. */
#ifdef __ANDROID__
fflush (stderr);
fflush (stdout);
#else /* !__ANDROID__ */
if (close_stream (stdout) != 0)
{
emacs_perror ("Write error to standard output");
_exit (EXIT_FAILURE);
}
/* Do not close stderr if addresses are being sanitized, as the
sanitizer might report to stderr after this function is invoked. */
bool err = buferr && (fflush (buferr) != 0 || ferror (buferr));
if (err | (ADDRESS_SANITIZER
? fflush (stderr) != 0 || ferror (stderr)
: close_stream (stderr) != 0))
_exit (EXIT_FAILURE);
#endif /* __ANDROID__ */
}
#ifndef DOS_NT
/* For make-serial-process */
int
serial_open (Lisp_Object port)
{
int fd = emacs_open (SSDATA (port), O_RDWR | O_NOCTTY | O_NONBLOCK, 0);
if (fd < 0)
report_file_error ("Opening serial port", port);
#ifdef TIOCEXCL
ioctl (fd, TIOCEXCL, (char *) 0);
#endif
return fd;
}
#if !defined (HAVE_CFMAKERAW)
/* Workaround for targets which are missing cfmakeraw. */
/* Pasted from man page. */
static void
cfmakeraw (struct termios *termios_p)
{
termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
termios_p->c_oflag &= ~OPOST;
termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
termios_p->c_cflag &= ~(CSIZE|PARENB);
termios_p->c_cflag |= CS8;
}
#endif /* !defined (HAVE_CFMAKERAW */
#if !defined (HAVE_CFSETSPEED)
/* Workaround for targets which are missing cfsetspeed. */
static int
cfsetspeed (struct termios *termios_p, speed_t vitesse)
{
return (cfsetispeed (termios_p, vitesse)
+ cfsetospeed (termios_p, vitesse));
}
#endif
/* The following is based on the glibc implementation of cfsetspeed. */
struct speed_struct
{
speed_t value;
speed_t internal;
};
static const struct speed_struct speeds[] =
{
#ifdef B0
{ 0, B0 },
#endif
#ifdef B50
{ 50, B50 },
#endif
#ifdef B75
{ 75, B75 },
#endif
#ifdef B110
{ 110, B110 },
#endif
#ifdef B134
{ 134, B134 },
#endif
#ifdef B150
{ 150, B150 },
#endif
#ifndef HAVE_TINY_SPEED_T
#ifdef B200
{ 200, B200 },
#endif
#ifdef B300
{ 300, B300 },
#endif
#ifdef B600
{ 600, B600 },
#endif
#ifdef B1200
{ 1200, B1200 },
#endif
#ifdef B1200
{ 1200, B1200 },
#endif
#ifdef B1800
{ 1800, B1800 },
#endif
#ifdef B2400
{ 2400, B2400 },
#endif
#ifdef B4800
{ 4800, B4800 },
#endif
#ifdef B9600
{ 9600, B9600 },
#endif
#ifdef B19200
{ 19200, B19200 },
#endif
#ifdef B38400
{ 38400, B38400 },
#endif
#ifdef B57600
{ 57600, B57600 },
#endif
#ifdef B76800
{ 76800, B76800 },
#endif
#ifdef B115200
{ 115200, B115200 },
#endif
#ifdef B153600
{ 153600, B153600 },
#endif
#ifdef B230400
{ 230400, B230400 },
#endif
#ifdef B307200
{ 307200, B307200 },
#endif
#ifdef B460800
{ 460800, B460800 },
#endif
#ifdef B500000
{ 500000, B500000 },
#endif
#ifdef B576000
{ 576000, B576000 },
#endif
#ifdef B921600
{ 921600, B921600 },
#endif
#ifdef B1000000
{ 1000000, B1000000 },
#endif
#ifdef B1152000
{ 1152000, B1152000 },
#endif
#ifdef B1500000
{ 1500000, B1500000 },
#endif
#ifdef B2000000
{ 2000000, B2000000 },
#endif
#ifdef B2500000
{ 2500000, B2500000 },
#endif
#ifdef B3000000
{ 3000000, B3000000 },
#endif
#ifdef B3500000
{ 3500000, B3500000 },
#endif
#ifdef B4000000
{ 4000000, B4000000 },
#endif
#endif /* HAVE_TINY_SPEED_T */
};
/* Convert a numerical speed (e.g., 9600) to a Bnnn constant (e.g.,
B9600); see bug#49524. */
static speed_t
convert_speed (speed_t speed)
{
for (size_t i = 0; i < sizeof speeds / sizeof speeds[0]; i++)
{
if (speed == speeds[i].internal)
return speed;
else if (speed == speeds[i].value)
return speeds[i].internal;
}
return speed;
}
/* For serial-process-configure */
void
serial_configure (struct Lisp_Process *p,
Lisp_Object contact)
{
Lisp_Object childp2 = Qnil;
Lisp_Object tem = Qnil;
struct termios attr;
int err;
char summary[4] = "???"; /* This usually becomes "8N1". */
childp2 = Fcopy_sequence (p->childp);
/* Read port attributes and prepare default configuration. */
err = tcgetattr (p->outfd, &attr);
if (err != 0)
report_file_error ("Failed tcgetattr", Qnil);
cfmakeraw (&attr);
#if defined (CLOCAL)
attr.c_cflag |= CLOCAL;
#endif
#if defined (CREAD)
attr.c_cflag |= CREAD;
#endif
/* Configure speed. */
if (!NILP (plist_member (contact, QCspeed)))
tem = plist_get (contact, QCspeed);
else
tem = plist_get (p->childp, QCspeed);
CHECK_FIXNUM (tem);
err = cfsetspeed (&attr, convert_speed (XFIXNUM (tem)));
if (err != 0)
report_file_error ("Failed cfsetspeed", tem);
childp2 = plist_put (childp2, QCspeed, tem);
/* Configure bytesize. */
if (!NILP (plist_member (contact, QCbytesize)))
tem = plist_get (contact, QCbytesize);
else
tem = plist_get (p->childp, QCbytesize);
if (NILP (tem))
tem = make_fixnum (8);
CHECK_FIXNUM (tem);
if (XFIXNUM (tem) != 7 && XFIXNUM (tem) != 8)
error (":bytesize must be nil (8), 7, or 8");
summary[0] = XFIXNUM (tem) + '0';
#if defined (CSIZE) && defined (CS7) && defined (CS8)
attr.c_cflag &= ~CSIZE;
attr.c_cflag |= ((XFIXNUM (tem) == 7) ? CS7 : CS8);
#else
/* Don't error on bytesize 8, which should be set by cfmakeraw. */
if (XFIXNUM (tem) != 8)
error ("Bytesize cannot be changed");
#endif
childp2 = plist_put (childp2, QCbytesize, tem);
/* Configure parity. */
if (!NILP (plist_member (contact, QCparity)))
tem = plist_get (contact, QCparity);
else
tem = plist_get (p->childp, QCparity);
if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
error (":parity must be nil (no parity), `even', or `odd'");
#if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
attr.c_cflag &= ~(PARENB | PARODD);
attr.c_iflag &= ~(IGNPAR | INPCK);
if (NILP (tem))
{
summary[1] = 'N';
}
else if (EQ (tem, Qeven))
{
summary[1] = 'E';
attr.c_cflag |= PARENB;
attr.c_iflag |= (IGNPAR | INPCK);
}
else if (EQ (tem, Qodd))
{
summary[1] = 'O';
attr.c_cflag |= (PARENB | PARODD);
attr.c_iflag |= (IGNPAR | INPCK);
}
#else
/* Don't error on no parity, which should be set by cfmakeraw. */
if (!NILP (tem))
error ("Parity cannot be configured");
#endif
childp2 = plist_put (childp2, QCparity, tem);
/* Configure stopbits. */
if (!NILP (plist_member (contact, QCstopbits)))
tem = plist_get (contact, QCstopbits);
else
tem = plist_get (p->childp, QCstopbits);
if (NILP (tem))
tem = make_fixnum (1);
CHECK_FIXNUM (tem);
if (XFIXNUM (tem) != 1 && XFIXNUM (tem) != 2)
error (":stopbits must be nil (1 stopbit), 1, or 2");
summary[2] = XFIXNUM (tem) + '0';
#if defined (CSTOPB)
attr.c_cflag &= ~CSTOPB;
if (XFIXNUM (tem) == 2)
attr.c_cflag |= CSTOPB;
#else
/* Don't error on 1 stopbit, which should be set by cfmakeraw. */
if (XFIXNUM (tem) != 1)
error ("Stopbits cannot be configured");
#endif
childp2 = plist_put (childp2, QCstopbits, tem);
/* Configure flowcontrol. */
if (!NILP (plist_member (contact, QCflowcontrol)))
tem = plist_get (contact, QCflowcontrol);
else
tem = plist_get (p->childp, QCflowcontrol);
if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
#if defined (CRTSCTS)
attr.c_cflag &= ~CRTSCTS;
#endif
#if defined (CNEW_RTSCTS)
attr.c_cflag &= ~CNEW_RTSCTS;
#endif
#if defined (IXON) && defined (IXOFF)
attr.c_iflag &= ~(IXON | IXOFF);
#endif
if (NILP (tem))
{
/* Already configured. */
}
else if (EQ (tem, Qhw))
{
#if defined (CRTSCTS)
attr.c_cflag |= CRTSCTS;
#elif defined (CNEW_RTSCTS)
attr.c_cflag |= CNEW_RTSCTS;
#else
error ("Hardware flowcontrol (RTS/CTS) not supported");
#endif
}
else if (EQ (tem, Qsw))
{
#if defined (IXON) && defined (IXOFF)
attr.c_iflag |= (IXON | IXOFF);
#else
error ("Software flowcontrol (XON/XOFF) not supported");
#endif
}
childp2 = plist_put (childp2, QCflowcontrol, tem);
/* Activate configuration. */
err = tcsetattr (p->outfd, TCSANOW, &attr);
if (err != 0)
report_file_error ("Failed tcsetattr", Qnil);
childp2 = plist_put (childp2, QCsummary, build_string (summary));
pset_childp (p, childp2);
}
#endif /* not DOS_NT */
/* System depended enumeration of and access to system processes a-la ps(1). */
#ifdef HAVE_PROCFS
/* Process enumeration and access via /proc. */
Lisp_Object
list_system_processes (void)
{
Lisp_Object procdir, match, proclist, next;
Lisp_Object tail;
/* For every process on the system, there's a directory in the
"/proc" pseudo-directory whose name is the numeric ID of that
process. */
procdir = build_string ("/proc");
match = build_string ("[0-9]+");
proclist = directory_files_internal (procdir, Qnil, match, Qt,
false, Qnil, Qnil);
/* `proclist' gives process IDs as strings. Destructively convert
each string into a number. */
for (tail = proclist; CONSP (tail); tail = next)
{
next = XCDR (tail);
XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil));
}
/* directory_files_internal returns the files in reverse order; undo
that. */
proclist = Fnreverse (proclist);
return proclist;
}
#elif defined DARWIN_OS || defined __FreeBSD__ || defined __OpenBSD__
Lisp_Object
list_system_processes (void)
{
#ifdef DARWIN_OS
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL};
#elif defined __OpenBSD__
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0,
sizeof (struct kinfo_proc), 4096};
#else
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PROC};
#endif
size_t len;
size_t mibsize = sizeof mib / sizeof mib[0];
struct kinfo_proc *procs;
size_t i;
Lisp_Object proclist = Qnil;
if (sysctl (mib, mibsize, NULL, &len, NULL, 0) != 0 || len == 0)
return proclist;
procs = xmalloc (len);
if (sysctl (mib, mibsize, procs, &len, NULL, 0) != 0 || len == 0)
{
xfree (procs);
return proclist;
}
len /= sizeof procs[0];
for (i = 0; i < len; i++)
{
#ifdef DARWIN_OS
proclist = Fcons (INT_TO_INTEGER (procs[i].kp_proc.p_pid), proclist);
#elif defined __OpenBSD__
proclist = Fcons (INT_TO_INTEGER (procs[i].p_pid), proclist);
#else
proclist = Fcons (INT_TO_INTEGER (procs[i].ki_pid), proclist);
#endif
}
xfree (procs);
return proclist;
}
/* The WINDOWSNT implementation is in w32.c.
The MSDOS implementation is in dosfns.c.
The Haiku implementation is in haiku.c. */
#elif !defined (WINDOWSNT) && !defined (MSDOS) && !defined (HAIKU)
Lisp_Object
list_system_processes (void)
{
return Qnil;
}
#endif /* !defined (WINDOWSNT) */
#if (HAVE_GETRUSAGE \
|| defined __FreeBSD__ || defined DARWIN_OS || defined __OpenBSD__)
static Lisp_Object
make_lisp_s_us (time_t s, long us)
{
Lisp_Object sec = make_int (s);
Lisp_Object usec = make_fixnum (us);
Lisp_Object hz = make_fixnum (1000000);
Lisp_Object ticks = CALLN (Fplus, CALLN (Ftimes, sec, hz), usec);
return Ftime_convert (Fcons (ticks, hz), Qnil);
}
#endif
#if defined __FreeBSD__ || defined DARWIN_OS
static Lisp_Object
make_lisp_timeval (struct timeval t)
{
return make_lisp_s_us (t.tv_sec, t.tv_usec);
}
#endif
#if defined (GNU_LINUX) || defined (CYGWIN) || defined __ANDROID__
static Lisp_Object
time_from_jiffies (unsigned long long ticks, Lisp_Object hz, Lisp_Object form)
{
return Ftime_convert (Fcons (make_uint (ticks), hz), form);
}
static Lisp_Object
put_jiffies (Lisp_Object attrs, Lisp_Object propname,
unsigned long long ticks, Lisp_Object hz)
{
return Fcons (Fcons (propname, time_from_jiffies (ticks, hz, Qnil)), attrs);
}
static Lisp_Object
get_up_time (void)
{
FILE *fup;
Lisp_Object up = Qnil;
block_input ();
fup = emacs_fopen ("/proc/uptime", "r");
if (fup)
{
unsigned long long upsec;
EMACS_UINT upfrac;
int upfrac_start, upfrac_end;
if (fscanf (fup, "%llu.%n%"pI"u%n",
&upsec, &upfrac_start, &upfrac, &upfrac_end)
== 2)
{
EMACS_INT hz = 1;
for (int i = upfrac_start; i < upfrac_end; i++)
hz *= 10;
Lisp_Object sec = make_uint (upsec);
Lisp_Object subsec = Fcons (make_fixnum (upfrac), make_fixnum (hz));
up = Ftime_add (sec, subsec);
}
emacs_fclose (fup);
}
unblock_input ();
return up;
}
# if defined GNU_LINUX || defined __ANDROID__
#define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
#define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
static Lisp_Object
procfs_ttyname (int rdev)
{
FILE *fdev;
char name[PATH_MAX];
block_input ();
fdev = emacs_fopen ("/proc/tty/drivers", "r");
name[0] = 0;
if (fdev)
{
unsigned major;
unsigned long minor_beg, minor_end;
char minor[25]; /* 2 32-bit numbers + dash */
char *endp;
for (; !feof (fdev) && !ferror (fdev); name[0] = 0)
{
if (fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor) >= 3
&& major == MAJOR (rdev))
{
minor_beg = strtoul (minor, &endp, 0);
if (*endp == '\0')
minor_end = minor_beg;
else if (*endp == '-')
minor_end = strtoul (endp + 1, &endp, 0);
else
continue;
if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end)
{
sprintf (name + strlen (name), "%u", MINOR (rdev));
break;
}
}
}
emacs_fclose (fdev);
}
unblock_input ();
return build_string (name);
}
# endif /* GNU_LINUX || __ANDROID__ */
static uintmax_t
procfs_get_total_memory (void)
{
FILE *fmem;
uintmax_t retval = 2 * 1024 * 1024; /* default: 2 GiB */
int c;
block_input ();
fmem = emacs_fopen ("/proc/meminfo", "r");
if (fmem)
{
uintmax_t entry_value;
bool done;
do
switch (fscanf (fmem, "MemTotal: %"SCNuMAX, &entry_value))
{
case 1:
retval = entry_value;
done = 1;
break;
case 0:
while ((c = getc (fmem)) != EOF && c != '\n')
continue;
done = c == EOF;
break;
default:
done = 1;
break;
}
while (!done);
emacs_fclose (fmem);
}
unblock_input ();
return retval;
}
Lisp_Object
system_process_attributes (Lisp_Object pid)
{
char procfn[PATH_MAX], fn[PATH_MAX];
struct stat st;
struct passwd *pw;
struct group *gr;
long clocks_per_sec;
char *procfn_end;
char procbuf[1025], *p, *q UNINIT;
int fd;
ssize_t nread;
static char const default_cmd[] = "???";
const char *cmd = default_cmd;
int cmdsize = sizeof default_cmd - 1;
char *cmdline = NULL;
ptrdiff_t cmdline_size;
char c;
intmax_t proc_id;
int ppid, pgrp, sess, tty, tpgid, thcount;
uid_t uid;
gid_t gid;
unsigned long long u_time, s_time, cutime, cstime, start;
long priority, niceness, rss;
unsigned long minflt, majflt, cminflt, cmajflt, vsize;
double pcpu, pmem;
Lisp_Object attrs = Qnil;
Lisp_Object decoded_cmd;
CHECK_NUMBER (pid);
CONS_TO_INTEGER (pid, pid_t, proc_id);
sprintf (procfn, "/proc/%"PRIdMAX, proc_id);
if (stat (procfn, &st) < 0)
return attrs;
/* euid egid */
uid = st.st_uid;
attrs = Fcons (Fcons (Qeuid, INT_TO_INTEGER (uid)), attrs);
block_input ();
pw = getpwuid (uid);
unblock_input ();
if (pw)
attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
gid = st.st_gid;
attrs = Fcons (Fcons (Qegid, INT_TO_INTEGER (gid)), attrs);
block_input ();
gr = getgrgid (gid);
unblock_input ();
if (gr)
attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
specpdl_ref count = SPECPDL_INDEX ();
strcpy (fn, procfn);
procfn_end = fn + strlen (fn);
strcpy (procfn_end, "/stat");
fd = emacs_open (fn, O_RDONLY, 0);
if (fd < 0)
nread = 0;
else
{
record_unwind_protect_int (close_file_unwind, fd);
nread = emacs_read_quit (fd, procbuf, sizeof procbuf - 1);
}
if (0 < nread)
{
procbuf[nread] = '\0';
p = procbuf;
p = strchr (p, '(');
if (p != NULL)
{
q = strrchr (p + 1, ')');
/* comm */
if (q != NULL)
{
cmd = p + 1;
cmdsize = q - cmd;
}
}
else
q = NULL;
/* Command name is encoded in locale-coding-system; decode it. */
AUTO_STRING_WITH_LEN (cmd_str, cmd, cmdsize);
decoded_cmd = code_convert_string_norecord (cmd_str,
Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
/* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
utime stime cutime cstime priority nice thcount . start vsize rss */
if (q
&& (sscanf (q + 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
"%llu %llu %llu %llu %ld %ld %d %*d %llu %lu %ld"),
&c, &ppid, &pgrp, &sess, &tty, &tpgid,
&minflt, &cminflt, &majflt, &cmajflt,
&u_time, &s_time, &cutime, &cstime,
&priority, &niceness, &thcount, &start, &vsize, &rss)
== 20))
{
char state_str[2];
state_str[0] = c;
state_str[1] = '\0';
attrs = Fcons (Fcons (Qstate, build_string (state_str)), attrs);
attrs = Fcons (Fcons (Qppid, INT_TO_INTEGER (ppid)), attrs);
attrs = Fcons (Fcons (Qpgrp, INT_TO_INTEGER (pgrp)), attrs);
attrs = Fcons (Fcons (Qsess, INT_TO_INTEGER (sess)), attrs);
# if defined GNU_LINUX || defined __ANDROID__
attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs);
# endif /* GNU_LINUX || __ANDROID__ */
attrs = Fcons (Fcons (Qtpgid, INT_TO_INTEGER (tpgid)), attrs);
attrs = Fcons (Fcons (Qminflt, INT_TO_INTEGER (minflt)), attrs);
attrs = Fcons (Fcons (Qmajflt, INT_TO_INTEGER (majflt)), attrs);
attrs = Fcons (Fcons (Qcminflt, INT_TO_INTEGER (cminflt)), attrs);
attrs = Fcons (Fcons (Qcmajflt, INT_TO_INTEGER (cmajflt)), attrs);
clocks_per_sec = sysconf (_SC_CLK_TCK);
if (0 < clocks_per_sec)
{
Lisp_Object hz = make_int (clocks_per_sec);
attrs = put_jiffies (attrs, Qutime, u_time, hz);
attrs = put_jiffies (attrs, Qstime, s_time, hz);
attrs = put_jiffies (attrs, Qtime, s_time + u_time, hz);
attrs = put_jiffies (attrs, Qcutime, cutime, hz);
attrs = put_jiffies (attrs, Qcstime, cstime, hz);
attrs = put_jiffies (attrs, Qctime, cstime + cutime, hz);
Lisp_Object uptime = get_up_time ();
if (!NILP (uptime))
{
Lisp_Object now = Ftime_convert (Qnil, hz);
Lisp_Object boot = Ftime_subtract (now, uptime);
Lisp_Object tstart = time_from_jiffies (start, hz, hz);
Lisp_Object lstart =
Ftime_convert (Ftime_add (boot, tstart), Qnil);
attrs = Fcons (Fcons (Qstart, lstart), attrs);
Lisp_Object etime =
Ftime_convert (Ftime_subtract (uptime, tstart), Qnil);
attrs = Fcons (Fcons (Qetime, etime), attrs);
pcpu = (100.0 * (s_time + u_time)
/ (clocks_per_sec * float_time (etime)));
attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
}
}
attrs = Fcons (Fcons (Qpri, make_fixnum (priority)), attrs);
attrs = Fcons (Fcons (Qnice, make_fixnum (niceness)), attrs);
attrs = Fcons (Fcons (Qthcount, INT_TO_INTEGER (thcount)), attrs);
attrs = Fcons (Fcons (Qvsize, INT_TO_INTEGER (vsize / 1024)), attrs);
attrs = Fcons (Fcons (Qrss, INT_TO_INTEGER (4 * rss)), attrs);
pmem = 4.0 * 100 * rss / procfs_get_total_memory ();
if (pmem > 100)
pmem = 100;
attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs);
}
}
unbind_to (count, Qnil);
# ifdef CYGWIN
/* ttname */
strcpy (procfn_end, "/ctty");
fd = emacs_open (fn, O_RDONLY, 0);
if (fd < 0)
nread = 0;
else
{
record_unwind_protect_int (close_file_unwind, fd);
nread = emacs_read_quit (fd, procbuf, sizeof procbuf);
}
/* /proc/<pid>/ctty should always end in newline. */
if (0 < nread && procbuf[nread - 1] == '\n')
procbuf[nread - 1] = '\0';
else
procbuf[0] = '\0';
attrs = Fcons (Fcons (Qttname, build_string (procbuf)), attrs);
unbind_to (count, Qnil);
# endif /* CYGWIN */
/* args */
strcpy (procfn_end, "/cmdline");
fd = emacs_open (fn, O_RDONLY, 0);
if (fd >= 0)
{
ptrdiff_t readsize, nread_incr;
record_unwind_protect_int (close_file_unwind, fd);
record_unwind_protect_nothing ();
nread = cmdline_size = 0;
do
{
cmdline = xpalloc (cmdline, &cmdline_size, 2, STRING_BYTES_BOUND, 1);
set_unwind_protect_ptr (specpdl_ref_add (count, 1), xfree, cmdline);
/* Leave room even if every byte needs escaping below. */
readsize = (cmdline_size >> 1) - nread;
nread_incr = emacs_read_quit (fd, cmdline + nread, readsize);
nread += max (0, nread_incr);
}
while (nread_incr == readsize);
if (nread)
{
/* We don't want trailing null characters. */
for (p = cmdline + nread; cmdline < p && !p[-1]; p--)
continue;
/* Escape-quote whitespace and backslashes. */
q = cmdline + cmdline_size;
while (cmdline < p)
{
char c = *--p;
*--q = c ? c : ' ';
if (c_isspace (c) || c == '\\')
*--q = '\\';
}
nread = cmdline + cmdline_size - q;
}
if (!nread)
{
nread = cmdsize + 2;
cmdline_size = nread + 1;
q = cmdline = xrealloc (cmdline, cmdline_size);
set_unwind_protect_ptr (specpdl_ref_add (count, 1), xfree, cmdline);
sprintf (cmdline, "[%.*s]", cmdsize, cmd);
}
/* Command line is encoded in locale-coding-system; decode it. */
AUTO_STRING_WITH_LEN (cmd_str, q, nread);
decoded_cmd = code_convert_string_norecord (cmd_str,
Vlocale_coding_system, 0);
unbind_to (count, Qnil);
attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
}
return attrs;
}
#elif defined (SOLARIS2) && defined (HAVE_PROCFS)
/* The <procfs.h> header does not like to be included if _LP64 is defined and
__FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
#if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
#define PROCFS_FILE_OFFSET_BITS_HACK 1
#undef _FILE_OFFSET_BITS
#else
#define PROCFS_FILE_OFFSET_BITS_HACK 0
#endif
#include <procfs.h>
#if PROCFS_FILE_OFFSET_BITS_HACK == 1
#define _FILE_OFFSET_BITS 64
#ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
#endif
#endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
Lisp_Object
system_process_attributes (Lisp_Object pid)
{
char procfn[PATH_MAX], fn[PATH_MAX];
struct stat st;
struct passwd *pw;
struct group *gr;
char *procfn_end;
struct psinfo pinfo;
int fd;
ssize_t nread;
intmax_t proc_id;
uid_t uid;
gid_t gid;
Lisp_Object attrs = Qnil;
Lisp_Object decoded_cmd;
CHECK_NUMBER (pid);
CONS_TO_INTEGER (pid, pid_t, proc_id);
sprintf (procfn, "/proc/%"PRIdMAX, proc_id);
if (stat (procfn, &st) < 0)
return attrs;
/* euid egid */
uid = st.st_uid;
attrs = Fcons (Fcons (Qeuid, INT_TO_INTEGER (uid)), attrs);
block_input ();
pw = getpwuid (uid);
unblock_input ();
if (pw)
attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
gid = st.st_gid;
attrs = Fcons (Fcons (Qegid, INT_TO_INTEGER (gid)), attrs);
block_input ();
gr = getgrgid (gid);
unblock_input ();
if (gr)
attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
specpdl_ref count = SPECPDL_INDEX ();
strcpy (fn, procfn);
procfn_end = fn + strlen (fn);
strcpy (procfn_end, "/psinfo");
fd = emacs_open (fn, O_RDONLY, 0);
if (fd < 0)
nread = 0;
else
{
record_unwind_protect_int (close_file_unwind, fd);
nread = emacs_read_quit (fd, &pinfo, sizeof pinfo);
}
if (nread == sizeof pinfo)
{
attrs = Fcons (Fcons (Qppid, INT_TO_INTEGER (pinfo.pr_ppid)), attrs);
attrs = Fcons (Fcons (Qpgrp, INT_TO_INTEGER (pinfo.pr_pgid)), attrs);
attrs = Fcons (Fcons (Qsess, INT_TO_INTEGER (pinfo.pr_sid)), attrs);
{
char state_str[2];
state_str[0] = pinfo.pr_lwp.pr_sname;
state_str[1] = '\0';
attrs = Fcons (Fcons (Qstate, build_string (state_str)), attrs);
}
/* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
need to get a string from it. */
/* FIXME: missing: Qtpgid */
/* FIXME: missing:
Qminflt
Qmajflt
Qcminflt
Qcmajflt
Qutime
Qcutime
Qstime
Qcstime
Are they available? */
attrs = Fcons (Fcons (Qtime, make_lisp_time (pinfo.pr_time)), attrs);
attrs = Fcons (Fcons (Qctime, make_lisp_time (pinfo.pr_ctime)), attrs);
attrs = Fcons (Fcons (Qpri, make_fixnum (pinfo.pr_lwp.pr_pri)), attrs);
attrs = Fcons (Fcons (Qnice, make_fixnum (pinfo.pr_lwp.pr_nice)), attrs);
attrs = Fcons (Fcons (Qthcount, INT_TO_INTEGER (pinfo.pr_nlwp)), attrs);
attrs = Fcons (Fcons (Qstart, make_lisp_time (pinfo.pr_start)), attrs);
attrs = Fcons (Fcons (Qvsize, INT_TO_INTEGER (pinfo.pr_size)), attrs);
attrs = Fcons (Fcons (Qrss, INT_TO_INTEGER (pinfo.pr_rssize)), attrs);
/* pr_pctcpu and pr_pctmem are unsigned integers in the
range 0 .. 2**15, representing 0.0 .. 1.0. */
attrs = Fcons (Fcons (Qpcpu,
make_float (100.0 / 0x8000 * pinfo.pr_pctcpu)),
attrs);
attrs = Fcons (Fcons (Qpmem,
make_float (100.0 / 0x8000 * pinfo.pr_pctmem)),
attrs);
AUTO_STRING (fname, pinfo.pr_fname);
decoded_cmd = code_convert_string_norecord (fname,
Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
AUTO_STRING (psargs, pinfo.pr_psargs);
decoded_cmd = code_convert_string_norecord (psargs,
Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
}
return unbind_to (count, attrs);
}
#elif defined __FreeBSD__
Lisp_Object
system_process_attributes (Lisp_Object pid)
{
int proc_id;
int pagesize = getpagesize ();
unsigned long npages;
int fscale;
struct passwd *pw;
struct group *gr;
char *ttyname;
size_t len;
char args[MAXPATHLEN];
int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID};
struct kinfo_proc proc;
size_t proclen = sizeof proc;
Lisp_Object attrs = Qnil;
Lisp_Object decoded_comm;
CHECK_NUMBER (pid);
CONS_TO_INTEGER (pid, int, proc_id);
mib[3] = proc_id;
if (sysctl (mib, 4, &proc, &proclen, NULL, 0) != 0 || proclen == 0)
return attrs;
attrs = Fcons (Fcons (Qeuid, INT_TO_INTEGER (proc.ki_uid)), attrs);
block_input ();
pw = getpwuid (proc.ki_uid);
unblock_input ();
if (pw)
attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
attrs = Fcons (Fcons (Qegid, INT_TO_INTEGER (proc.ki_svgid)), attrs);
block_input ();
gr = getgrgid (proc.ki_svgid);
unblock_input ();
if (gr)
attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
AUTO_STRING (comm, proc.ki_comm);
decoded_comm = code_convert_string_norecord (comm, Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qcomm, decoded_comm), attrs);
{
char state[2] = {'\0', '\0'};
switch (proc.ki_stat)
{
case SRUN:
state[0] = 'R';
break;
case SSLEEP:
state[0] = 'S';
break;
case SLOCK:
state[0] = 'D';
break;
case SZOMB:
state[0] = 'Z';
break;
case SSTOP:
state[0] = 'T';
break;
}
attrs = Fcons (Fcons (Qstate, build_string (state)), attrs);
}
attrs = Fcons (Fcons (Qppid, INT_TO_INTEGER (proc.ki_ppid)), attrs);
attrs = Fcons (Fcons (Qpgrp, INT_TO_INTEGER (proc.ki_pgid)), attrs);
attrs = Fcons (Fcons (Qsess, INT_TO_INTEGER (proc.ki_sid)), attrs);
block_input ();
ttyname = proc.ki_tdev == NODEV ? NULL : devname (proc.ki_tdev, S_IFCHR);
unblock_input ();
if (ttyname)
attrs = Fcons (Fcons (Qttname, build_string (ttyname)), attrs);
attrs = Fcons (Fcons (Qtpgid, INT_TO_INTEGER (proc.ki_tpgid)), attrs);
attrs = Fcons (Fcons (Qminflt, INT_TO_INTEGER (proc.ki_rusage.ru_minflt)),
attrs);
attrs = Fcons (Fcons (Qmajflt, INT_TO_INTEGER (proc.ki_rusage.ru_majflt)),
attrs);
attrs = Fcons (Fcons (Qcminflt, make_fixnum (proc.ki_rusage_ch.ru_minflt)), attrs);
attrs = Fcons (Fcons (Qcmajflt, make_fixnum (proc.ki_rusage_ch.ru_majflt)), attrs);
Lisp_Object utime = make_lisp_timeval (proc.ki_rusage.ru_utime);
attrs = Fcons (Fcons (Qutime, utime), attrs);
Lisp_Object stime = make_lisp_timeval (proc.ki_rusage.ru_stime);
attrs = Fcons (Fcons (Qstime, stime), attrs);
attrs = Fcons (Fcons (Qtime, Ftime_add (utime, stime)), attrs);
Lisp_Object cutime = make_lisp_timeval (proc.ki_rusage_ch.ru_utime);
attrs = Fcons (Fcons (Qcutime, cutime), attrs);
Lisp_Object cstime = make_lisp_timeval (proc.ki_rusage_ch.ru_stime);
attrs = Fcons (Fcons (Qcstime, cstime), attrs);
attrs = Fcons (Fcons (Qctime, Ftime_add (cutime, cstime)), attrs);
attrs = Fcons (Fcons (Qthcount, INT_TO_INTEGER (proc.ki_numthreads)), attrs);
attrs = Fcons (Fcons (Qpri, make_fixnum (proc.ki_pri.pri_native)), attrs);
attrs = Fcons (Fcons (Qnice, make_fixnum (proc.ki_nice)), attrs);
Lisp_Object start = make_lisp_timeval (proc.ki_start);
attrs = Fcons (Fcons (Qstart, start), attrs);
attrs = Fcons (Fcons (Qvsize, make_fixnum (proc.ki_size >> 10)), attrs);
attrs = Fcons (Fcons (Qrss, make_fixnum (proc.ki_rssize * pagesize >> 10)),
attrs);
Lisp_Object now = Ftime_convert (Qnil, make_fixnum (1000000));
Lisp_Object etime = Ftime_convert (Ftime_subtract (now, start), Qnil);
attrs = Fcons (Fcons (Qetime, etime), attrs);
len = sizeof fscale;
if (sysctlbyname ("kern.fscale", &fscale, &len, NULL, 0) == 0)
{
double pcpu;
fixpt_t ccpu;
len = sizeof ccpu;
if (sysctlbyname ("kern.ccpu", &ccpu, &len, NULL, 0) == 0)
{
pcpu = (100.0 * proc.ki_pctcpu / fscale
/ (1 - exp (proc.ki_swtime * log ((double) ccpu / fscale))));
attrs = Fcons (Fcons (Qpcpu, INT_TO_INTEGER (pcpu)), attrs);
}
}
len = sizeof npages;
if (sysctlbyname ("hw.availpages", &npages, &len, NULL, 0) == 0)
{
double pmem = (proc.ki_flag & P_INMEM
? 100.0 * proc.ki_rssize / npages
: 0);
attrs = Fcons (Fcons (Qpmem, INT_TO_INTEGER (pmem)), attrs);
}
mib[2] = KERN_PROC_ARGS;
len = MAXPATHLEN;
if (sysctl (mib, 4, args, &len, NULL, 0) == 0 && len != 0)
{
int i;
for (i = 0; i < len; i++)
{
if (! args[i] && i < len - 1)
args[i] = ' ';
}
AUTO_STRING (comm, args);
decoded_comm = code_convert_string_norecord (comm,
Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qargs, decoded_comm), attrs);
}
return attrs;
}
#elif defined __OpenBSD__
Lisp_Object
system_process_attributes (Lisp_Object pid)
{
int proc_id, fscale, i;
int pagesize = getpagesize ();
int mib[6];
size_t len;
double pct;
char *ttyname, args[ARG_MAX];
struct kinfo_proc proc;
struct passwd *pw;
struct group *gr;
struct uvmexp uvmexp;
Lisp_Object attrs = Qnil;
Lisp_Object decoded_comm;
CHECK_NUMBER (pid);
CONS_TO_INTEGER (pid, int, proc_id);
len = sizeof proc;
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = proc_id;
mib[4] = len;
mib[5] = 1;
if (sysctl (mib, 6, &proc, &len, NULL, 0) != 0)
return attrs;
attrs = Fcons (Fcons (Qeuid, INT_TO_INTEGER (proc.p_uid)), attrs);
block_input ();
pw = getpwuid (proc.p_uid);
unblock_input ();
if (pw)
attrs = Fcons (Fcons (Quser, build_string(pw->pw_name)), attrs);
attrs = Fcons (Fcons (Qegid, INT_TO_INTEGER(proc.p_svgid)), attrs);
block_input ();
gr = getgrgid (proc.p_svgid);
unblock_input ();
if (gr)
attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
AUTO_STRING (comm, proc.p_comm);
decoded_comm = code_convert_string_norecord (comm, Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qcomm, decoded_comm), attrs);
{
char state[2] = {'\0', '\0'};
switch (proc.p_stat) {
case SIDL:
state[0] = 'I';
break;
case SRUN:
state[0] = 'R';
break;
case SSLEEP:
state[0] = 'S';
break;
case SSTOP:
state[0] = 'T';
break;
case SZOMB:
state[0] = 'Z';
break;
case SDEAD:
state[0] = 'D';
break;
}
attrs = Fcons (Fcons (Qstate, build_string (state)), attrs);
}
attrs = Fcons (Fcons (Qppid, INT_TO_INTEGER (proc.p_ppid)), attrs);
attrs = Fcons (Fcons (Qpgrp, INT_TO_INTEGER (proc.p_gid)), attrs);
attrs = Fcons (Fcons (Qsess, INT_TO_INTEGER (proc.p_sid)), attrs);
block_input ();
ttyname = proc.p_tdev == NODEV ? NULL : devname (proc.p_tdev, S_IFCHR);
unblock_input ();
if (ttyname)
attrs = Fcons (Fcons (Qttname, build_string (ttyname)), attrs);
attrs = Fcons (Fcons (Qtpgid, INT_TO_INTEGER (proc.p_tpgid)), attrs);
attrs = Fcons (Fcons (Qminflt, INT_TO_INTEGER (proc.p_uru_minflt)),
attrs);
attrs = Fcons (Fcons (Qmajflt, INT_TO_INTEGER (proc.p_uru_majflt)),
attrs);
/* FIXME: missing cminflt, cmajflt. */
Lisp_Object utime = make_lisp_s_us (proc.p_uutime_sec, proc.p_uutime_usec);
attrs = Fcons (Fcons (Qutime, utime), attrs);
Lisp_Object stime = make_lisp_s_us (proc.p_ustime_sec, proc.p_ustime_usec);
attrs = Fcons (Fcons (Qstime, stime), attrs);
attrs = Fcons (Fcons (Qtime, Ftime_add (utime, stime)), attrs);
attrs = Fcons (Fcons (Qcutime, make_lisp_s_us (proc.p_uctime_sec,
proc.p_uctime_usec)),
attrs);
/* FIXME: missing cstime and thus ctime. */
attrs = Fcons (Fcons (Qpri, make_fixnum (proc.p_priority)), attrs);
attrs = Fcons (Fcons (Qnice, make_fixnum (proc.p_nice)), attrs);
/* FIXME: missing thcount (thread count) */
attrs = Fcons (Fcons (Qstart, make_lisp_s_us (proc.p_ustart_sec,
proc.p_ustart_usec)),
attrs);
len = (proc.p_vm_tsize + proc.p_vm_dsize + proc.p_vm_ssize) * pagesize >> 10;
attrs = Fcons (Fcons (Qvsize, make_fixnum (len)), attrs);
attrs = Fcons (Fcons (Qrss, make_fixnum (proc.p_vm_rssize * pagesize >> 10)),
attrs);
Lisp_Object now = Ftime_convert (Qnil, make_fixnum (1000000));
Lisp_Object start = make_lisp_s_us (proc.p_ustart_sec,
proc.p_ustart_usec);
Lisp_Object etime = Ftime_convert (Ftime_subtract (now, start), Qnil);
attrs = Fcons (Fcons (Qetime, etime), attrs);
len = sizeof (fscale);
mib[0] = CTL_KERN;
mib[1] = KERN_FSCALE;
if (sysctl (mib, 2, &fscale, &len, NULL, 0) != -1)
{
pct = (double)proc.p_pctcpu / fscale * 100.0;
attrs = Fcons (Fcons (Qpcpu, make_float (pct)), attrs);
}
len = sizeof (uvmexp);
mib[0] = CTL_VM;
mib[1] = VM_UVMEXP;
if (sysctl (mib, 2, &uvmexp, &len, NULL, 0) != -1)
{
pct = (100.0 * (double)proc.p_vm_rssize / uvmexp.npages);
attrs = Fcons (Fcons (Qpmem, make_float (pct)), attrs);
}
len = sizeof args;
mib[0] = CTL_KERN;
mib[1] = KERN_PROC_ARGS;
mib[2] = proc_id;
mib[3] = KERN_PROC_ARGV;
if (sysctl (mib, 4, &args, &len, NULL, 0) == 0 && len != 0)
{
char **argv = (char**)args;
/* concatenate argv reusing the existing storage storage.
sysctl(8) guarantees that "the buffer pointed to by oldp is
filled with an array of char pointers followed by the strings
themselves." */
for (i = 0; argv[i] != NULL; ++i)
{
if (argv[i+1] != NULL)
{
len = strlen (argv[i]);
argv[i][len] = ' ';
}
}
AUTO_STRING (comm, *argv);
decoded_comm = code_convert_string_norecord (comm,
Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qargs, decoded_comm), attrs);
}
return attrs;
}
#elif defined DARWIN_OS
#define HAVE_RUSAGE_INFO_CURRENT (__MAC_OS_X_VERSION_MIN_REQUIRED >= 101000)
#define HAVE_PROC_PIDINFO (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1050)
Lisp_Object
system_process_attributes (Lisp_Object pid)
{
int proc_id, i;
struct passwd *pw;
struct group *gr;
char *ttyname;
struct timeval starttime;
dev_t tdev;
uid_t uid;
gid_t gid;
int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID};
struct kinfo_proc proc;
size_t len = sizeof proc;
Lisp_Object attrs = Qnil;
Lisp_Object decoded_comm;
CHECK_NUMBER (pid);
CONS_TO_INTEGER (pid, int, proc_id);
mib[3] = proc_id;
if (sysctl (mib, 4, &proc, &len, NULL, 0) != 0 || len == 0)
return attrs;
uid = proc.kp_eproc.e_ucred.cr_uid;
attrs = Fcons (Fcons (Qeuid, INT_TO_INTEGER (uid)), attrs);
block_input ();
pw = getpwuid (uid);
unblock_input ();
if (pw)
attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
gid = proc.kp_eproc.e_pcred.p_svgid;
attrs = Fcons (Fcons (Qegid, INT_TO_INTEGER (gid)), attrs);
block_input ();
gr = getgrgid (gid);
unblock_input ();
if (gr)
attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
char pathbuf[PROC_PIDPATHINFO_MAXSIZE];
char *comm;
if (proc_pidpath (proc_id, pathbuf, sizeof(pathbuf)) > 0)
{
if ((comm = strrchr (pathbuf, '/')))
comm++;
else
comm = pathbuf;
}
else
comm = proc.kp_proc.p_comm;
decoded_comm = (code_convert_string_norecord
(build_unibyte_string (comm),
Vlocale_coding_system, 0));
attrs = Fcons (Fcons (Qcomm, decoded_comm), attrs);
{
char state[2] = {'\0', '\0'};
switch (proc.kp_proc.p_stat)
{
case SRUN:
state[0] = 'R';
break;
case SSLEEP:
state[0] = 'S';
break;
case SZOMB:
state[0] = 'Z';
break;
case SSTOP:
state[0] = 'T';
break;
case SIDL:
state[0] = 'I';
break;
}
attrs = Fcons (Fcons (Qstate, build_string (state)), attrs);
}
attrs = Fcons (Fcons (Qppid, INT_TO_INTEGER (proc.kp_eproc.e_ppid)), attrs);
attrs = Fcons (Fcons (Qpgrp, INT_TO_INTEGER (proc.kp_eproc.e_pgid)), attrs);
tdev = proc.kp_eproc.e_tdev;
block_input ();
ttyname = tdev == NODEV ? NULL : devname (tdev, S_IFCHR);
unblock_input ();
if (ttyname)
attrs = Fcons (Fcons (Qttname, build_string (ttyname)), attrs);
attrs = Fcons (Fcons (Qtpgid, INT_TO_INTEGER (proc.kp_eproc.e_tpgid)),
attrs);
#if HAVE_RUSAGE_INFO_CURRENT
rusage_info_current ri;
if (proc_pid_rusage(proc_id, RUSAGE_INFO_CURRENT, (rusage_info_t *) &ri) == 0)
{
struct timespec utime = make_timespec (ri.ri_user_time / TIMESPEC_HZ,
ri.ri_user_time % TIMESPEC_HZ);
struct timespec stime = make_timespec (ri.ri_system_time / TIMESPEC_HZ,
ri.ri_system_time % TIMESPEC_HZ);
attrs = Fcons (Fcons (Qutime, make_lisp_time (utime)), attrs);
attrs = Fcons (Fcons (Qstime, make_lisp_time (stime)), attrs);
attrs = Fcons (Fcons (Qtime, make_lisp_time (timespec_add (utime, stime))), attrs);
attrs = Fcons (Fcons (Qmajflt, INT_TO_INTEGER (ri.ri_pageins)), attrs);
}
#else /* !HAVE_RUSAGE_INFO_CURRENT */
struct rusage *rusage = proc.kp_proc.p_ru;
if (rusage)
{
attrs = Fcons (Fcons (Qminflt, INT_TO_INTEGER (rusage->ru_minflt)),
attrs);
attrs = Fcons (Fcons (Qmajflt, INT_TO_INTEGER (rusage->ru_majflt)),
attrs);
Lisp_Object utime = make_lisp_timeval (rusage->ru_utime);
Lisp_Object stime = make_lisp_timeval (rusage->ru_stime);
attrs = Fcons (Fcons (Qutime, utime), attrs);
attrs = Fcons (Fcons (Qstime, stime), attrs);
attrs = Fcons (Fcons (Qtime, Ftime_add (utime, stime)), attrs);
}
#endif /* !HAVE_RUSAGE_INFO_CURRENT */
starttime = proc.kp_proc.p_starttime;
attrs = Fcons (Fcons (Qnice, make_fixnum (proc.kp_proc.p_nice)), attrs);
Lisp_Object start = make_lisp_timeval (starttime);
attrs = Fcons (Fcons (Qstart, start), attrs);
Lisp_Object now = Ftime_convert (Qnil, make_fixnum (1000000));
Lisp_Object etime = Ftime_convert (Ftime_subtract (now, start), Qnil);
attrs = Fcons (Fcons (Qetime, etime), attrs);
#if HAVE_PROC_PIDINFO
struct proc_taskinfo taskinfo;
if (proc_pidinfo (proc_id, PROC_PIDTASKINFO, 0, &taskinfo, sizeof (taskinfo)) > 0)
{
attrs = Fcons (Fcons (Qvsize, make_fixnum (taskinfo.pti_virtual_size / 1024)), attrs);
attrs = Fcons (Fcons (Qrss, make_fixnum (taskinfo.pti_resident_size / 1024)), attrs);
attrs = Fcons (Fcons (Qthcount, make_fixnum (taskinfo.pti_threadnum)), attrs);
}
#endif /* HAVE_PROC_PIDINFO */
#ifdef KERN_PROCARGS2
char args[ARG_MAX];
mib[1] = KERN_PROCARGS2;
mib[2] = proc_id;
len = sizeof args;
if (sysctl (mib, 3, &args, &len, NULL, 0) == 0 && len != 0)
{
char *start, *end;
int argc = *(int*)args; /* argc is the first int */
start = args + sizeof (int);
start += strlen (start) + 1; /* skip executable name and any '\0's */
while ((start - args < len) && ! *start) start++;
/* skip argv to find real end */
for (i = 0, end = start; i < argc && (end - args) < len; i++)
{
end += strlen (end) + 1;
}
len = end - start;
for (int i = 0; i < len; i++)
{
if (! start[i] && i < len - 1)
start[i] = ' ';
}
AUTO_STRING (comm, start);
decoded_comm = code_convert_string_norecord (comm,
Vlocale_coding_system, 0);
attrs = Fcons (Fcons (Qargs, decoded_comm), attrs);
}
#endif /* KERN_PROCARGS2 */
return attrs;
}
/* The WINDOWSNT implementation is in w32.c.
The MSDOS implementation is in dosfns.c.
The HAIKU implementation is in haiku.c. */
#elif !defined (WINDOWSNT) && !defined (MSDOS) && !defined (HAIKU)
Lisp_Object
system_process_attributes (Lisp_Object pid)
{
return Qnil;
}
#endif /* !defined (WINDOWSNT) */
DEFUN ("get-internal-run-time", Fget_internal_run_time, Sget_internal_run_time,
0, 0, 0,
doc: /* Return the current run time used by Emacs.
The time is returned as in the style of `current-time'.
On systems that can't determine the run time, `get-internal-run-time'
does the same thing as `current-time'. */)
(void)
{
#ifdef HAVE_GETRUSAGE
struct rusage usage;
time_t secs;
int usecs;
if (getrusage (RUSAGE_SELF, &usage) < 0)
/* This shouldn't happen. What action is appropriate? */
xsignal0 (Qerror);
/* Sum up user time and system time. */
secs = usage.ru_utime.tv_sec + usage.ru_stime.tv_sec;
usecs = usage.ru_utime.tv_usec + usage.ru_stime.tv_usec;
if (usecs >= 1000000)
{
usecs -= 1000000;
secs++;
}
return make_lisp_s_us (secs, usecs);
#else /* ! HAVE_GETRUSAGE */
#ifdef WINDOWSNT
return w32_get_internal_run_time ();
#else /* ! WINDOWSNT */
return Fcurrent_time ();
#endif /* WINDOWSNT */
#endif /* HAVE_GETRUSAGE */
}
/* Wide character string collation. */
#ifdef __STDC_ISO_10646__
# include <wchar.h>
# include <wctype.h>
# if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
# include <locale.h>
# endif
# ifndef LC_COLLATE
# define LC_COLLATE 0
# endif
# ifndef LC_COLLATE_MASK
# define LC_COLLATE_MASK 0
# endif
# ifndef LC_CTYPE
# define LC_CTYPE 0
# endif
# ifndef LC_CTYPE_MASK
# define LC_CTYPE_MASK 0
# endif
# ifndef HAVE_NEWLOCALE
# undef freelocale
# undef locale_t
# undef newlocale
# undef wcscoll_l
# undef towlower_l
# define freelocale emacs_freelocale
# define locale_t emacs_locale_t
# define newlocale emacs_newlocale
# define wcscoll_l emacs_wcscoll_l
# define towlower_l emacs_towlower_l
typedef char const *locale_t;
static locale_t
newlocale (int category_mask, char const *locale, locale_t loc)
{
return locale;
}
static void
freelocale (locale_t loc)
{
}
static char *
emacs_setlocale (int category, char const *locale)
{
# ifdef HAVE_SETLOCALE
errno = 0;
char *loc = setlocale (category, locale);
if (loc || errno)
return loc;
errno = EINVAL;
# else
errno = ENOTSUP;
# endif
return 0;
}
static int
wcscoll_l (wchar_t const *a, wchar_t const *b, locale_t loc)
{
int result = 0;
char *oldloc = emacs_setlocale (LC_COLLATE, NULL);
int err;
if (! oldloc)
err = errno;
else
{
USE_SAFE_ALLOCA;
char *oldcopy = SAFE_ALLOCA (strlen (oldloc) + 1);
strcpy (oldcopy, oldloc);
if (! emacs_setlocale (LC_COLLATE, loc))
err = errno;
else
{
errno = 0;
result = wcscoll (a, b);
err = errno;
if (! emacs_setlocale (LC_COLLATE, oldcopy))
err = errno;
}
SAFE_FREE ();
}
errno = err;
return result;
}
static wint_t
towlower_l (wint_t wc, locale_t loc)
{
wint_t result = wc;
char *oldloc = emacs_setlocale (LC_CTYPE, NULL);
if (oldloc)
{
USE_SAFE_ALLOCA;
char *oldcopy = SAFE_ALLOCA (strlen (oldloc) + 1);
strcpy (oldcopy, oldloc);
if (emacs_setlocale (LC_CTYPE, loc))
{
result = towlower (wc);
emacs_setlocale (LC_COLLATE, oldcopy);
}
SAFE_FREE ();
}
return result;
}
# endif
int
str_collate (Lisp_Object s1, Lisp_Object s2,
Lisp_Object locale, Lisp_Object ignore_case)
{
int res, err;
ptrdiff_t len, i, i_byte;
wchar_t *p1, *p2;
USE_SAFE_ALLOCA;
/* Convert byte stream to code points. */
len = SCHARS (s1); i = i_byte = 0;
SAFE_NALLOCA (p1, 1, len + 1);
while (i < len)
{
wchar_t *p = &p1[i];
*p = fetch_string_char_advance (s1, &i, &i_byte);
}
p1[len] = 0;
len = SCHARS (s2); i = i_byte = 0;
SAFE_NALLOCA (p2, 1, len + 1);
while (i < len)
{
wchar_t *p = &p2[i];
*p = fetch_string_char_advance (s2, &i, &i_byte);
}
p2[len] = 0;
if (STRINGP (locale))
{
locale_t loc = newlocale (LC_COLLATE_MASK | LC_CTYPE_MASK,
SSDATA (locale), 0);
if (!loc)
error ("Invalid locale %s: %s", SSDATA (locale), emacs_strerror (errno));
if (! NILP (ignore_case))
for (int i = 1; i < 3; i++)
{
wchar_t *p = (i == 1) ? p1 : p2;
for (; *p; p++)
*p = towlower_l (*p, loc);
}
errno = 0;
res = wcscoll_l (p1, p2, loc);
err = errno;
freelocale (loc);
}
else
{
if (! NILP (ignore_case))
for (int i = 1; i < 3; i++)
{
wchar_t *p = (i == 1) ? p1 : p2;
for (; *p; p++)
*p = towlower (*p);
}
errno = 0;
res = wcscoll (p1, p2);
err = errno;
}
# ifndef HAVE_NEWLOCALE
if (err)
error ("Invalid locale or string for collation: %s", emacs_strerror (err));
# else
if (err)
error ("Invalid string for collation: %s", emacs_strerror (err));
# endif
SAFE_FREE ();
return res;
}
#endif /* __STDC_ISO_10646__ */
#ifdef WINDOWSNT
int
str_collate (Lisp_Object s1, Lisp_Object s2,
Lisp_Object locale, Lisp_Object ignore_case)
{
char *loc = STRINGP (locale) ? SSDATA (locale) : NULL;
int res, err = errno;
errno = 0;
res = w32_compare_strings (SSDATA (s1), SSDATA (s2), loc, !NILP (ignore_case));
if (errno)
error ("Invalid string for collation: %s", strerror (errno));
errno = err;
return res;
}
#endif /* WINDOWSNT */
void
syms_of_sysdep (void)
{
defsubr (&Sget_internal_run_time);
}
Reference in New Issue View Git Blame Copy Permalink