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sudo/plugins/sudoers/sudoreplay.c

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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2009-2023 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <stdlib.h>
#if defined(HAVE_STDINT_H)
# include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <dirent.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif /* HAVE_STDBOOL_H */
#include <regex.h>
#include <signal.h>
#ifdef HAVE_GETOPT_LONG
# include <getopt.h>
# else
# include <compat/getopt.h>
#endif /* HAVE_GETOPT_LONG */
#include <pathnames.h>
#include <sudo_compat.h>
#include <sudo_conf.h>
#include <sudo_debug.h>
#include <sudo_event.h>
#include <sudo_eventlog.h>
#include <sudo_lbuf.h>
#include <sudo_fatal.h>
#include <sudo_gettext.h>
#include <sudo_iolog.h>
#include <sudo_plugin.h>
#include <sudo_queue.h>
#include <sudo_util.h>
#include <logging.h>
struct replay_closure {
const char *iolog_dir;
struct sudo_event_base *evbase;
struct sudo_event *delay_ev;
struct sudo_event *keyboard_ev;
struct sudo_event *output_ev;
struct sudo_event *sighup_ev;
struct sudo_event *sigint_ev;
struct sudo_event *sigquit_ev;
struct sudo_event *sigterm_ev;
struct sudo_event *sigtstp_ev;
struct timespec *offset;
struct timespec *max_delay;
struct timing_closure timing;
int iolog_dir_fd;
bool interactive;
bool suspend_wait;
struct io_buffer {
size_t len; /* buffer length (how much produced) */
size_t off; /* write position (how much already consumed) */
size_t toread; /* how much remains to be read */
int lastc; /* last char written */
char buf[64 * 1024];
} iobuf;
};
/*
* Handle expressions like:
* ( user millert or user root ) and tty console and command /bin/sh
*/
STAILQ_HEAD(search_node_list, search_node);
struct search_node {
STAILQ_ENTRY(search_node) entries;
#define ST_EXPR 1
#define ST_TTY 2
#define ST_USER 3
#define ST_PATTERN 4
#define ST_RUNASUSER 5
#define ST_RUNASGROUP 6
#define ST_FROMDATE 7
#define ST_TODATE 8
#define ST_CWD 9
#define ST_HOST 10
char type;
bool negated;
bool or;
union {
regex_t cmdre;
struct timespec tstamp;
char *cwd;
char *host;
char *tty;
char *user;
char *runas_group;
char *runas_user;
struct search_node_list expr;
void *ptr;
} u;
};
static struct search_node_list search_expr = STAILQ_HEAD_INITIALIZER(search_expr);
static double speed_factor = 1.0;
static const char *session_dir = _PATH_SUDO_IO_LOGDIR;
static bool terminal_can_resize, terminal_was_resized, follow_mode;
static int terminal_lines, terminal_cols;
static int ttyfd = -1;
static struct iolog_file iolog_files[] = {
{ false }, /* IOFD_STDIN */
{ false }, /* IOFD_STDOUT */
{ false }, /* IOFD_STDERR */
{ false }, /* IOFD_TTYIN */
{ false }, /* IOFD_TTYOUT */
{ true, }, /* IOFD_TIMING */
};
static const char short_opts[] = "d:f:Fhlm:nRSs:V";
static struct option long_opts[] = {
{ "directory", required_argument, NULL, 'd' },
{ "filter", required_argument, NULL, 'f' },
{ "follow", no_argument, NULL, 'F' },
{ "help", no_argument, NULL, 'h' },
{ "list", no_argument, NULL, 'l' },
{ "max-wait", required_argument, NULL, 'm' },
{ "non-interactive", no_argument, NULL, 'n' },
{ "no-resize", no_argument, NULL, 'R' },
{ "suspend-wait", no_argument, NULL, 'S' },
{ "speed", required_argument, NULL, 's' },
{ "version", no_argument, NULL, 'V' },
{ NULL, no_argument, NULL, '\0' },
};
/* XXX move to separate header? (currently in sudoers.h) */
extern char *get_timestr(time_t, int);
extern time_t get_date(char *);
static int list_sessions(int, char **, const char *, const char *, const char *);
static int parse_expr(struct search_node_list *, char **, bool);
static void read_keyboard(int fd, int what, void *v);
static int replay_session(int iolog_dir_fd, const char *iolog_dir,
struct timespec *offset, struct timespec *max_wait, const char *decimal,
bool interactive, bool suspend_wait);
static void sudoreplay_cleanup(void);
static void write_output(int fd, int what, void *v);
static void restore_terminal_size(void);
static void setup_terminal(struct eventlog *evlog, bool interactive, bool resize);
sudo_noreturn static void help(void);
sudo_noreturn static void usage(void);
#define VALID_ID(s) (isalnum((unsigned char)(s)[0]) && \
isalnum((unsigned char)(s)[1]) && isalnum((unsigned char)(s)[2]) && \
isalnum((unsigned char)(s)[3]) && isalnum((unsigned char)(s)[4]) && \
isalnum((unsigned char)(s)[5]) && (s)[6] == '\0')
sudo_dso_public int main(int argc, char *argv[]);
int
main(int argc, char *argv[])
{
int ch, i, iolog_dir_fd, len, exitcode = EXIT_FAILURE;
bool def_filter = true, listonly = false;
bool interactive = true, suspend_wait = false, resize = true;
const char *decimal, *id, *user = NULL, *pattern = NULL, *tty = NULL;
char *cp, *ep, iolog_dir[PATH_MAX];
struct timespec offset = { 0, 0};
struct eventlog *evlog;
struct timespec max_delay_storage, *max_delay = NULL;
double dval;
debug_decl(main, SUDO_DEBUG_MAIN);
#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
{
extern char *malloc_options;
malloc_options = "S";
}
#endif
initprogname(argc > 0 ? argv[0] : "sudoreplay");
setlocale(LC_ALL, "");
decimal = localeconv()->decimal_point;
bindtextdomain("sudoers", LOCALEDIR); /* XXX - should have sudoreplay domain */
textdomain("sudoers");
/* Register fatal/fatalx callback. */
sudo_fatal_callback_register(sudoreplay_cleanup);
/* Read sudo.conf and initialize the debug subsystem. */
if (sudo_conf_read(NULL, SUDO_CONF_DEBUG) == -1)
return EXIT_FAILURE;
sudo_debug_register(getprogname(), NULL, NULL,
sudo_conf_debug_files(getprogname()), -1);
while ((ch = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
switch (ch) {
case 'd':
session_dir = optarg;
break;
case 'f':
/* Set the replay filter. */
def_filter = false;
for (cp = strtok_r(optarg, ",", &ep); cp; cp = strtok_r(NULL, ",", &ep)) {
if (strcmp(cp, "stdin") == 0)
iolog_files[IOFD_STDIN].enabled = true;
else if (strcmp(cp, "stdout") == 0)
iolog_files[IOFD_STDOUT].enabled = true;
else if (strcmp(cp, "stderr") == 0)
iolog_files[IOFD_STDERR].enabled = true;
else if (strcmp(cp, "ttyin") == 0)
iolog_files[IOFD_TTYIN].enabled = true;
else if (strcmp(cp, "ttyout") == 0)
iolog_files[IOFD_TTYOUT].enabled = true;
else
sudo_fatalx(U_("invalid filter option: %s"), optarg);
}
break;
case 'F':
follow_mode = true;
break;
case 'h':
help();
/* NOTREACHED */
case 'l':
listonly = true;
break;
case 'm':
errno = 0;
dval = strtod(optarg, &ep);
if (*ep != '\0' || errno != 0)
sudo_fatalx(U_("invalid max wait: %s"), optarg);
if (dval <= 0.0) {
sudo_timespecclear(&max_delay_storage);
} else {
max_delay_storage.tv_sec = (time_t)dval;
max_delay_storage.tv_nsec = (long)
((dval - (double)max_delay_storage.tv_sec) * 1000000000.0);
}
max_delay = &max_delay_storage;
break;
case 'n':
interactive = false;
break;
case 'R':
resize = false;
break;
case 'S':
suspend_wait = true;
break;
case 's':
errno = 0;
speed_factor = strtod(optarg, &ep);
if (*ep != '\0' || errno != 0)
sudo_fatalx(U_("invalid speed factor: %s"), optarg);
break;
case 'V':
(void) printf(_("%s version %s\n"), getprogname(), PACKAGE_VERSION);
exitcode = EXIT_SUCCESS;
goto done;
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (listonly) {
exitcode = list_sessions(argc, argv, pattern, user, tty);
goto done;
}
if (argc != 1)
usage();
/* By default we replay stdout, stderr and ttyout. */
if (def_filter) {
iolog_files[IOFD_STDOUT].enabled = true;
iolog_files[IOFD_STDERR].enabled = true;
iolog_files[IOFD_TTYOUT].enabled = true;
}
/* Check for offset in @sec.nsec form at the end of the id. */
id = argv[0];
if ((cp = strchr(id, '@')) != NULL) {
ep = iolog_parse_delay(cp + 1, &offset, decimal);
if (ep == NULL || *ep != '\0')
sudo_fatalx(U_("invalid time offset %s"), cp + 1);
*cp = '\0';
}
/* 6 digit ID in base 36, e.g. 01G712AB or free-form name */
if (VALID_ID(id)) {
len = snprintf(iolog_dir, sizeof(iolog_dir), "%s/%.2s/%.2s/%.2s",
session_dir, id, &id[2], &id[4]);
if (len < 0 || len >= ssizeof(iolog_dir))
sudo_fatalx(U_("%s/%.2s/%.2s/%.2s: %s"), session_dir,
id, &id[2], &id[4], strerror(ENAMETOOLONG));
} else if (id[0] == '/') {
len = snprintf(iolog_dir, sizeof(iolog_dir), "%s", id);
if (len < 0 || len >= ssizeof(iolog_dir))
sudo_fatalx(U_("%s/timing: %s"), id, strerror(ENAMETOOLONG));
} else {
len = snprintf(iolog_dir, sizeof(iolog_dir), "%s/%s", session_dir, id);
if (len < 0 || len >= ssizeof(iolog_dir)) {
sudo_fatalx(U_("%s/%s: %s"), session_dir, id,
strerror(ENAMETOOLONG));
}
}
/* Open files for replay, applying replay filter for the -f flag. */
if ((iolog_dir_fd = iolog_openat(AT_FDCWD, iolog_dir, O_RDONLY)) == -1)
sudo_fatal("%s", iolog_dir);
for (i = 0; i < IOFD_MAX; i++) {
if (!iolog_open(&iolog_files[i], iolog_dir_fd, i, "r")) {
if (errno != ENOENT) {
sudo_fatal(U_("unable to open %s/%s"), iolog_dir,
iolog_fd_to_name(i));
}
}
}
if (!iolog_files[IOFD_TIMING].enabled) {
sudo_fatal(U_("unable to open %s/%s"), iolog_dir,
iolog_fd_to_name(IOFD_TIMING));
}
/* Parse log file. */
if ((evlog = iolog_parse_loginfo(iolog_dir_fd, iolog_dir)) == NULL)
goto done;
printf(_("Replaying sudo session: %s"), evlog->command);
if (evlog->runargv != NULL && evlog->runargv[0] != NULL) {
for (i = 1; evlog->runargv[i] != NULL; i++)
printf(" %s", evlog->runargv[i]);
}
/* Setup terminal if appropriate. */
if (!isatty(STDIN_FILENO) || !isatty(STDOUT_FILENO))
interactive = false;
setup_terminal(evlog, interactive, resize);
putchar('\r');
putchar('\n');
/* Done with parsed log file. */
eventlog_free(evlog);
evlog = NULL;
/* Replay session corresponding to iolog_files[]. */
exitcode = replay_session(iolog_dir_fd, iolog_dir, &offset, max_delay,
decimal, interactive, suspend_wait);
restore_terminal_size();
sudo_term_restore(ttyfd, true);
done:
sudo_debug_exit_int(__func__, __FILE__, __LINE__, sudo_debug_subsys, exitcode);
return exitcode;
}
/*
* List of terminals that support xterm-like resizing.
* This is not an exhaustive list.
* For a list of VT100 style escape codes, see:
* http://invisible-island.net/xterm/ctlseqs/ctlseqs.html#VT100%20Mode
*/
struct term_names {
const char *name;
unsigned int len;
} compatible_terms[] = {
{ "Eterm", 5 },
{ "aterm", 5 },
{ "dtterm", 6 },
{ "gnome", 5 },
{ "konsole", 7 },
{ "kvt\0", 4 },
{ "mlterm", 6 },
{ "rxvt", 4 },
{ "xterm", 5 },
{ NULL, 0 }
};
struct getsize_closure {
int nums[2];
int nums_depth;
int nums_maxdepth;
int state;
const char *cp;
struct sudo_event *ev;
struct timespec timeout;
};
/* getsize states */
#define INITIAL 0x00
#define NEW_NUMBER 0x01
#define NUMBER 0x02
#define GOTSIZE 0x04
#define READCHAR 0x10
/*
* Callback for reading the terminal size response.
* We use an event for this to support timeouts.
*/
static void
getsize_cb(int fd, int what, void *v)
{
struct getsize_closure *gc = v;
unsigned char ch = '\0';
debug_decl(getsize_cb, SUDO_DEBUG_UTIL);
for (;;) {
if (gc->cp[0] == '\0') {
gc->state = GOTSIZE;
goto done;
}
if (ISSET(gc->state, READCHAR)) {
ssize_t nread = read(ttyfd, &ch, 1);
switch (nread) {
case -1:
if (errno == EAGAIN)
goto another;
FALLTHROUGH;
case 0:
goto done;
default:
CLR(gc->state, READCHAR);
break;
}
}
switch (gc->state) {
case INITIAL:
if (ch == 0233 && gc->cp[0] == '\033') {
/* meta escape, equivalent to ESC[ */
ch = '[';
gc->cp++;
}
if (gc->cp[0] == '%' && gc->cp[1] == 'd') {
gc->state = NEW_NUMBER;
continue;
}
if (gc->cp[0] != ch) {
sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_LINENO,
"got %d, expected %d", ch, gc->cp[0]);
goto done;
}
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"got %d", ch);
SET(gc->state, READCHAR);
gc->cp++;
break;
case NEW_NUMBER:
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"parsing number");
if (!isdigit(ch))
goto done;
gc->cp += 2;
if (gc->nums_depth > gc->nums_maxdepth)
goto done;
gc->nums[gc->nums_depth] = 0;
gc->state = NUMBER;
FALLTHROUGH;
case NUMBER:
if (!isdigit(ch)) {
/* done with number, reparse ch */
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"number %d (ch %d)", gc->nums[gc->nums_depth], ch);
gc->nums_depth++;
gc->state = INITIAL;
continue;
}
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"got %d", ch);
if (gc->nums[gc->nums_depth] > INT_MAX / 10)
goto done;
gc->nums[gc->nums_depth] *= 10;
gc->nums[gc->nums_depth] += (ch - '0');
SET(gc->state, READCHAR);
break;
}
}
another:
if (sudo_ev_add(NULL, gc->ev, &gc->timeout, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
done:
debug_return;
}
/*
* Get the terminal size using vt100 terminal escapes.
*/
static bool
xterm_get_size(int *new_lines, int *new_cols)
{
struct sudo_event_base *evbase;
struct getsize_closure gc;
const char getsize_request[] = "\0337\033[r\033[999;999H\033[6n";
const char getsize_response[] = "\033[%d;%dR";
bool ret = false;
debug_decl(xterm_get_size, SUDO_DEBUG_UTIL);
/* request the terminal's size */
if (write(ttyfd, getsize_request, strlen(getsize_request)) == -1) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO|SUDO_DEBUG_ERRNO,
"%s: error writing xterm size request", __func__);
goto done;
}
/*
* Callback info for reading back the size with a 10 second timeout.
* We expect two numbers (lines and cols).
*/
gc.state = INITIAL|READCHAR;
gc.nums_depth = 0;
gc.nums_maxdepth = 1;
gc.cp = getsize_response;
gc.timeout.tv_sec = 10;
gc.timeout.tv_nsec = 0;
/* Setup an event for reading the terminal size */
evbase = sudo_ev_base_alloc();
if (evbase == NULL)
sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
gc.ev = sudo_ev_alloc(ttyfd, SUDO_EV_READ, getsize_cb, &gc);
if (gc.ev == NULL)
sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
/* Read back terminal size response */
if (sudo_ev_add(evbase, gc.ev, &gc.timeout, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
sudo_ev_dispatch(evbase);
if (gc.state == GOTSIZE) {
sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
"terminal size %d x %x", gc.nums[0], gc.nums[1]);
*new_lines = gc.nums[0];
*new_cols = gc.nums[1];
ret = true;
}
sudo_ev_base_free(evbase);
sudo_ev_free(gc.ev);
done:
debug_return_bool(ret);
}
/*
* Set the size of the text area to lines and cols.
* Depending on the terminal implementation, the window itself may
* or may not shrink to a smaller size.
*/
static bool
xterm_set_size(int lines, int cols)
{
const char setsize_fmt[] = "\033[8;%d;%dt";
int len, new_lines, new_cols;
bool ret = false;
char buf[1024];
debug_decl(xterm_set_size, SUDO_DEBUG_UTIL);
/* XXX - save cursor and position restore after resizing */
len = snprintf(buf, sizeof(buf), setsize_fmt, lines, cols);
if (len < 0 || len >= ssizeof(buf)) {
/* not possible due to size of buf */
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: internal error, buffer too small?", __func__);
goto done;
}
if (write(ttyfd, buf, strlen(buf)) == -1) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO|SUDO_DEBUG_ERRNO,
"%s: error writing xterm resize request", __func__);
goto done;
}
/* XXX - keyboard input will interfere with this */
if (!xterm_get_size(&new_lines, &new_cols))
goto done;
if (lines == new_lines && cols == new_cols)
ret = true;
done:
debug_return_bool(ret);
}
static void
setup_terminal(struct eventlog *evlog, bool interactive, bool resize)
{
const char *term;
debug_decl(check_terminal, SUDO_DEBUG_UTIL);
fflush(stdout);
/* Open fd for /dev/tty and set to raw mode. */
if (interactive) {
ttyfd = open(_PATH_TTY, O_RDWR);
if (ttyfd == -1)
sudo_fatal("%s", U_("unable to set tty to raw mode"));
while (!sudo_term_raw(ttyfd, SUDO_TERM_ISIG)) {
if (errno != EINTR)
sudo_fatal("%s", U_("unable to set tty to raw mode"));
kill(getpid(), SIGTTOU);
}
}
/* Find terminal size if the session has size info. */
if (evlog->lines == 0 && evlog->columns == 0) {
/* no tty size info, hope for the best... */
debug_return;
}
if (resize && ttyfd != -1) {
term = getenv("TERM");
if (term != NULL && *term != '\0') {
struct term_names *tn;
for (tn = compatible_terms; tn->name != NULL; tn++) {
if (strncmp(term, tn->name, tn->len) == 0) {
/* xterm-like terminals can resize themselves. */
if (xterm_get_size(&terminal_lines, &terminal_cols))
terminal_can_resize = true;
break;
}
}
}
}
if (!terminal_can_resize) {
/* either not xterm or not interactive */
sudo_get_ttysize(ttyfd, &terminal_lines, &terminal_cols);
}
if (evlog->lines == terminal_lines && evlog->columns == terminal_cols) {
/* nothing to change */
debug_return;
}
if (terminal_can_resize) {
/* session terminal size is different, try to resize ours */
if (xterm_set_size(evlog->lines, evlog->columns)) {
/* success */
sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
"resized terminal to %d x %x", evlog->lines, evlog->columns);
terminal_was_resized = true;
debug_return;
}
/* resize failed, don't try again */
terminal_can_resize = false;
}
if (evlog->lines > terminal_lines || evlog->columns > terminal_cols) {
puts(_("Warning: your terminal is too small to properly replay the log."));
printf(_("Log geometry is %d x %d, your terminal's geometry is %d x %d."), evlog->lines, evlog->columns, terminal_lines, terminal_cols);
}
debug_return;
}
static void
resize_terminal(int lines, int cols)
{
debug_decl(resize_terminal, SUDO_DEBUG_UTIL);
if (terminal_can_resize) {
if (xterm_set_size(lines, cols))
terminal_was_resized = true;
else
terminal_can_resize = false;
}
debug_return;
}
static void
restore_terminal_size(void)
{
debug_decl(restore_terminal, SUDO_DEBUG_UTIL);
if (terminal_was_resized) {
/* We are still in raw mode, hence the carriage return. */
putchar('\r');
fputs(U_("Replay finished, press any key to restore the terminal."),
stdout);
fflush(stdout);
(void)getchar();
xterm_set_size(terminal_lines, terminal_cols);
putchar('\r');
putchar('\n');
}
debug_return;
}
static bool
iolog_complete(struct replay_closure *closure)
{
struct stat sb;
debug_decl(iolog_complete, SUDO_DEBUG_UTIL);
if (fstatat(closure->iolog_dir_fd, "timing", &sb, 0) != -1) {
if (ISSET(sb.st_mode, S_IWUSR|S_IWGRP|S_IWOTH))
debug_return_bool(false);
}
debug_return_bool(true);
}
/*
* Read the next record from the timing file and schedule a delay
* event with the specified timeout.
* In follow mode, ignore EOF and just delay for a short time.
* Return 0 on success, 1 on EOF and -1 on error.
*/
static int
get_timing_record(struct replay_closure *closure)
{
struct timing_closure *timing = &closure->timing;
bool nodelay = false;
debug_decl(get_timing_record, SUDO_DEBUG_UTIL);
if (follow_mode && timing->event == IO_EVENT_COUNT) {
/* In follow mode, we already waited. */
nodelay = true;
}
switch (iolog_read_timing_record(&iolog_files[IOFD_TIMING], timing)) {
case -1:
/* error */
debug_return_int(-1);
case 1:
/* EOF */
if (!follow_mode || iolog_complete(closure)) {
debug_return_int(1);
}
/* Follow mode, keep reading until done. */
iolog_clearerr(&iolog_files[IOFD_TIMING]);
timing->delay.tv_sec = 0;
timing->delay.tv_nsec = 1000000;
timing->iol = NULL;
timing->event = IO_EVENT_COUNT;
break;
default:
/* Record number bytes to read. */
if (timing->event != IO_EVENT_WINSIZE &&
timing->event != IO_EVENT_SUSPEND) {
closure->iobuf.len = 0;
closure->iobuf.off = 0;
closure->iobuf.lastc = '\0';
closure->iobuf.toread = timing->u.nbytes;
}
if (sudo_timespecisset(closure->offset)) {
if (sudo_timespeccmp(&timing->delay, closure->offset, >)) {
sudo_timespecsub(&timing->delay, closure->offset, &timing->delay);
sudo_timespecclear(closure->offset);
} else {
sudo_timespecsub(closure->offset, &timing->delay, closure->offset);
sudo_timespecclear(&timing->delay);
}
}
if (nodelay) {
/* Already waited, fire immediately. */
timing->delay.tv_sec = 0;
timing->delay.tv_nsec = 0;
} else {
/* Adjust delay using speed factor and max_delay. */
iolog_adjust_delay(&timing->delay, closure->max_delay,
speed_factor);
}
break;
}
/* Schedule the delay event. */
if (sudo_ev_add(closure->evbase, closure->delay_ev, &timing->delay, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
debug_return_int(0);
}
/*
* Read next timing record.
* Exits the event loop on EOF, breaks out on error.
*/
static void
next_timing_record(struct replay_closure *closure)
{
debug_decl(next_timing_record, SUDO_DEBUG_UTIL);
again:
switch (get_timing_record(closure)) {
case 0:
/* success */
if (closure->timing.event == IO_EVENT_SUSPEND &&
closure->timing.u.signo == SIGCONT && !closure->suspend_wait) {
/* Ignore time spent suspended. */
goto again;
}
break;
case 1:
/* EOF */
sudo_ev_loopexit(closure->evbase);
break;
default:
/* error */
sudo_ev_loopbreak(closure->evbase);
break;
}
debug_return;
}
static bool
fill_iobuf(struct replay_closure *closure)
{
const size_t space = sizeof(closure->iobuf.buf) - closure->iobuf.len;
const struct timing_closure *timing = &closure->timing;
const char *errstr;
debug_decl(fill_iobuf, SUDO_DEBUG_UTIL);
if (closure->iobuf.toread != 0 && space != 0) {
const size_t len =
closure->iobuf.toread < space ? closure->iobuf.toread : space;
ssize_t nread = iolog_read(timing->iol,
closure->iobuf.buf + closure->iobuf.off, len, &errstr);
if (nread <= 0) {
if (nread == 0) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s/%s: premature EOF, expected %zu bytes",
closure->iolog_dir, iolog_fd_to_name(timing->event),
closure->iobuf.toread);
} else {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s/%s: read error: %s", closure->iolog_dir,
iolog_fd_to_name(timing->event), errstr);
}
sudo_warnx(U_("unable to read %s/%s: %s"),
closure->iolog_dir, iolog_fd_to_name(timing->event), errstr);
debug_return_bool(false);
}
closure->iobuf.toread -= (size_t)nread;
closure->iobuf.len += (size_t)nread;
}
debug_return_bool(true);
}
/*
* Called when the inter-record delay has expired.
* Depending on the record type, either reads the next
* record or changes window size.
*/
static void
delay_cb(int fd, int what, void *v)
{
struct replay_closure *closure = v;
struct timing_closure *timing = &closure->timing;
debug_decl(delay_cb, SUDO_DEBUG_UTIL);
switch (timing->event) {
case IO_EVENT_WINSIZE:
resize_terminal(timing->u.winsize.lines, timing->u.winsize.cols);
break;
case IO_EVENT_STDIN:
if (iolog_files[IOFD_STDIN].enabled)
timing->iol = &iolog_files[IOFD_STDIN];
break;
case IO_EVENT_STDOUT:
if (iolog_files[IOFD_STDOUT].enabled)
timing->iol = &iolog_files[IOFD_STDOUT];
break;
case IO_EVENT_STDERR:
if (iolog_files[IOFD_STDERR].enabled)
timing->iol = &iolog_files[IOFD_STDERR];
break;
case IO_EVENT_TTYIN:
if (iolog_files[IOFD_TTYIN].enabled)
timing->iol = &iolog_files[IOFD_TTYIN];
break;
case IO_EVENT_TTYOUT:
if (iolog_files[IOFD_TTYOUT].enabled)
timing->iol = &iolog_files[IOFD_TTYOUT];
break;
}
if (timing->iol != NULL) {
/* If the stream is open, enable the write event. */
if (sudo_ev_add(closure->evbase, closure->output_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
} else {
/* Not replaying, get the next timing record and continue. */
next_timing_record(closure);
}
debug_return;
}
static void
replay_closure_free(struct replay_closure *closure)
{
/*
* Free events and event base, then the closure itself.
*/
if (closure->iolog_dir_fd != -1)
close(closure->iolog_dir_fd);
sudo_ev_free(closure->delay_ev);
sudo_ev_free(closure->keyboard_ev);
sudo_ev_free(closure->output_ev);
sudo_ev_free(closure->sighup_ev);
sudo_ev_free(closure->sigint_ev);
sudo_ev_free(closure->sigquit_ev);
sudo_ev_free(closure->sigterm_ev);
sudo_ev_free(closure->sigtstp_ev);
sudo_ev_base_free(closure->evbase);
free(closure);
}
static void
signal_cb(int signo, int what, void *v)
{
struct replay_closure *closure = v;
debug_decl(signal_cb, SUDO_DEBUG_UTIL);
switch (signo) {
case SIGHUP:
case SIGINT:
case SIGQUIT:
case SIGTERM:
/* Free the event base and restore signal handlers. */
replay_closure_free(closure);
/* Restore the terminal and die. */
sudoreplay_cleanup();
kill(getpid(), signo);
break;
case SIGTSTP:
/* Ignore ^Z since we have no way to restore the screen. */
break;
}
debug_return;
}
static struct replay_closure *
replay_closure_alloc(int iolog_dir_fd, const char *iolog_dir,
struct timespec *offset, struct timespec *max_delay, const char *decimal,
bool interactive, bool suspend_wait)
{
struct replay_closure *closure;
debug_decl(replay_closure_alloc, SUDO_DEBUG_UTIL);
if ((closure = calloc(1, sizeof(*closure))) == NULL)
debug_return_ptr(NULL);
closure->iolog_dir_fd = iolog_dir_fd;
closure->iolog_dir = iolog_dir;
closure->interactive = interactive;
closure->offset = offset;
closure->suspend_wait = suspend_wait;
closure->max_delay = max_delay;
closure->timing.decimal = decimal;
/*
* Setup event base and delay, input and output events.
* If interactive, take input from and write to /dev/tty.
* If not interactive there is no input event.
*/
closure->evbase = sudo_ev_base_alloc();
if (closure->evbase == NULL)
goto bad;
closure->delay_ev = sudo_ev_alloc(-1, SUDO_EV_TIMEOUT, delay_cb, closure);
if (closure->delay_ev == NULL)
goto bad;
if (interactive) {
closure->keyboard_ev = sudo_ev_alloc(ttyfd, SUDO_EV_READ|SUDO_EV_PERSIST,
read_keyboard, closure);
if (closure->keyboard_ev == NULL)
goto bad;
if (sudo_ev_add(closure->evbase, closure->keyboard_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
}
closure->output_ev = sudo_ev_alloc(interactive ? ttyfd : STDOUT_FILENO,
SUDO_EV_WRITE, write_output, closure);
if (closure->output_ev == NULL)
goto bad;
/*
* Setup signal events, we need to restore the terminal if killed.
*/
closure->sighup_ev = sudo_ev_alloc(SIGHUP, SUDO_EV_SIGNAL, signal_cb,
closure);
if (closure->sighup_ev == NULL)
goto bad;
if (sudo_ev_add(closure->evbase, closure->sighup_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
closure->sigint_ev = sudo_ev_alloc(SIGINT, SUDO_EV_SIGNAL, signal_cb,
closure);
if (closure->sigint_ev == NULL)
goto bad;
if (sudo_ev_add(closure->evbase, closure->sigint_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
closure->sigquit_ev = sudo_ev_alloc(SIGQUIT, SUDO_EV_SIGNAL, signal_cb,
closure);
if (closure->sigquit_ev == NULL)
goto bad;
if (sudo_ev_add(closure->evbase, closure->sigquit_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
closure->sigterm_ev = sudo_ev_alloc(SIGTERM, SUDO_EV_SIGNAL, signal_cb,
closure);
if (closure->sigterm_ev == NULL)
goto bad;
if (sudo_ev_add(closure->evbase, closure->sigterm_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
closure->sigtstp_ev = sudo_ev_alloc(SIGTSTP, SUDO_EV_SIGNAL, signal_cb,
closure);
if (closure->sigtstp_ev == NULL)
goto bad;
if (sudo_ev_add(closure->evbase, closure->sigtstp_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
debug_return_ptr(closure);
bad:
replay_closure_free(closure);
debug_return_ptr(NULL);
}
static int
replay_session(int iolog_dir_fd, const char *iolog_dir, struct timespec *offset,
struct timespec *max_delay, const char *decimal, bool interactive,
bool suspend_wait)
{
struct replay_closure *closure;
int ret = 0;
debug_decl(replay_session, SUDO_DEBUG_UTIL);
/* Allocate the delay closure and read the first timing record. */
closure = replay_closure_alloc(iolog_dir_fd, iolog_dir, offset, max_delay,
decimal, interactive, suspend_wait);
if (get_timing_record(closure) != 0) {
ret = 1;
goto done;
}
/* Run event loop. */
sudo_ev_dispatch(closure->evbase);
if (sudo_ev_got_break(closure->evbase))
ret = 1;
done:
/* Clean up and return. */
replay_closure_free(closure);
debug_return_int(ret);
}
/*
* Write the I/O buffer.
*/
static void
write_output(int fd, int what, void *v)
{
struct replay_closure *closure = v;
const struct timing_closure *timing = &closure->timing;
struct io_buffer *iobuf = &closure->iobuf;
int iovcnt = 1;
struct iovec iov[2];
bool added_cr = false;
size_t nbytes;
ssize_t nwritten;
debug_decl(write_output, SUDO_DEBUG_UTIL);
/* Refill iobuf if there is more to read and buf is empty. */
if (!fill_iobuf(closure)) {
sudo_ev_loopbreak(closure->evbase);
debug_return;
}
nbytes = iobuf->len - iobuf->off;
iov[0].iov_base = iobuf->buf + iobuf->off;
iov[0].iov_len = nbytes;
if (closure->interactive &&
(timing->event == IO_EVENT_STDOUT || timing->event == IO_EVENT_STDERR)) {
char *nl;
/*
* We may need to insert a carriage return before the newline.
* Note that the carriage return may have already been written.
*/
nl = memchr(iov[0].iov_base, '\n', iov[0].iov_len);
if (nl != NULL) {
size_t len = (size_t)(nl - (char *)iov[0].iov_base);
if ((nl == iov[0].iov_base && iobuf->lastc != '\r') ||
(nl != iov[0].iov_base && nl[-1] != '\r')) {
iov[0].iov_len = len;
iov[1].iov_base = (char *)"\r\n";
iov[1].iov_len = 2;
iovcnt = 2;
nbytes = iov[0].iov_len + iov[1].iov_len;
added_cr = true;
}
}
}
nwritten = writev(fd, iov, iovcnt);
switch (nwritten) {
case -1:
if (errno != EINTR && errno != EAGAIN)
sudo_fatal(U_("unable to write to %s"), "stdout");
break;
case 0:
/* Should not happen. */
break;
default:
if (added_cr && (size_t)nwritten >= nbytes - 1) {
/* The last char written was either '\r' or '\n'. */
iobuf->lastc = (size_t)nwritten == nbytes ? '\n' : '\r';
} else {
/* Stash the last char written. */
iobuf->lastc = *((char *)iov[0].iov_base + nwritten);
}
if (added_cr) {
/* Subtract one for the carriage return we added above. */
nwritten--;
}
iobuf->off += (size_t)nwritten;
break;
}
if (iobuf->off == iobuf->len) {
/* Write complete, go to next timing entry if possible. */
switch (get_timing_record(closure)) {
case 0:
/* success */
break;
case 1:
/* EOF */
sudo_ev_loopexit(closure->evbase);
break;
default:
/* error */
sudo_ev_loopbreak(closure->evbase);
break;
}
} else {
/* Reschedule event to write remainder. */
if (sudo_ev_add(NULL, closure->output_ev, NULL, false) == -1)
sudo_fatal("%s", U_("unable to add event to queue"));
}
debug_return;
}
/*
* Build expression list from search args
*/
static int
parse_expr(struct search_node_list *head, char *argv[], bool sub_expr)
{
bool or = false, not = false;
struct search_node *sn;
char type, **av;
const char *errstr;
debug_decl(parse_expr, SUDO_DEBUG_UTIL);
for (av = argv; *av != NULL; av++) {
switch (av[0][0]) {
case 'a': /* and (ignore) */
if (strncmp(*av, "and", strlen(*av)) != 0)
goto bad;
continue;
case 'o': /* or */
if (strncmp(*av, "or", strlen(*av)) != 0)
goto bad;
or = true;
continue;
case '!': /* negate */
if (av[0][1] != '\0')
goto bad;
not = true;
continue;
case 'c': /* cwd or command */
if (av[0][1] == '\0')
sudo_fatalx(U_("ambiguous expression \"%s\""), *av);
if (strncmp(*av, "cwd", strlen(*av)) == 0)
type = ST_CWD;
else if (strncmp(*av, "command", strlen(*av)) == 0)
type = ST_PATTERN;
else
goto bad;
break;
case 'f': /* from date */
if (strncmp(*av, "fromdate", strlen(*av)) != 0)
goto bad;
type = ST_FROMDATE;
break;
case 'g': /* runas group */
if (strncmp(*av, "group", strlen(*av)) != 0)
goto bad;
type = ST_RUNASGROUP;
break;
case 'h': /* host */
if (strncmp(*av, "host", strlen(*av)) != 0)
goto bad;
type = ST_HOST;
break;
case 'r': /* runas user */
if (strncmp(*av, "runas", strlen(*av)) != 0)
goto bad;
type = ST_RUNASUSER;
break;
case 't': /* tty or to date */
if (av[0][1] == '\0')
sudo_fatalx(U_("ambiguous expression \"%s\""), *av);
if (strncmp(*av, "todate", strlen(*av)) == 0)
type = ST_TODATE;
else if (strncmp(*av, "tty", strlen(*av)) == 0)
type = ST_TTY;
else
goto bad;
break;
case 'u': /* user */
if (strncmp(*av, "user", strlen(*av)) != 0)
goto bad;
type = ST_USER;
break;
case '(': /* start sub-expression */
if (av[0][1] != '\0')
goto bad;
type = ST_EXPR;
break;
case ')': /* end sub-expression */
if (av[0][1] != '\0')
goto bad;
if (!sub_expr)
sudo_fatalx("%s", U_("unmatched ')' in expression"));
debug_return_int((int)(av - argv) + 1);
default:
bad:
sudo_fatalx(U_("unknown search term \"%s\""), *av);
/* NOTREACHED */
}
/* Allocate new search node */
if ((sn = calloc(1, sizeof(*sn))) == NULL)
sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
sn->type = type;
sn->or = or;
sn->negated = not;
if (type == ST_EXPR) {
STAILQ_INIT(&sn->u.expr);
av += parse_expr(&sn->u.expr, av + 1, true);
} else {
if (*(++av) == NULL)
sudo_fatalx(U_("%s requires an argument"), av[-1]);
if (type == ST_PATTERN) {
if (!sudo_regex_compile(&sn->u.cmdre, *av, &errstr)) {
sudo_fatalx(U_("invalid regular expression \"%s\": %s"),
*av, U_(errstr));
}
} else if (type == ST_TODATE || type == ST_FROMDATE) {
sn->u.tstamp.tv_sec = get_date(*av);
sn->u.tstamp.tv_nsec = 0;
if (sn->u.tstamp.tv_sec == -1)
sudo_fatalx(U_("could not parse date \"%s\""), *av);
} else {
sn->u.ptr = *av;
}
}
not = or = false; /* reset state */
STAILQ_INSERT_TAIL(head, sn, entries);
}
if (sub_expr)
sudo_fatalx("%s", U_("unmatched '(' in expression"));
if (or)
sudo_fatalx("%s", U_("illegal trailing \"or\""));
if (not)
sudo_fatalx("%s", U_("illegal trailing \"!\""));
debug_return_int((int)(av - argv));
}
static char *
expand_command(struct eventlog *evlog, char **newbuf)
{
size_t len, bufsize = strlen(evlog->command) + 1;
char *cp, *buf;
int ac;
debug_decl(expand_command, SUDO_DEBUG_UTIL);
if (evlog->runargv == NULL || evlog->runargv[0] == NULL || evlog->runargv[1] == NULL) {
/* No arguments, we can use the command as-is. */
*newbuf = NULL;
debug_return_str(evlog->command);
}
/* Skip argv[0], we use evlog->command instead. */
for (ac = 1; evlog->runargv[ac] != NULL; ac++)
bufsize += strlen(evlog->runargv[ac]) + 1;
if ((buf = malloc(bufsize)) == NULL)
sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
cp = buf;
len = strlcpy(cp, evlog->command, bufsize);
if (len >= bufsize)
sudo_fatalx(U_("internal error, %s overflow"), __func__);
cp += len;
bufsize -= len;
for (ac = 1; evlog->runargv[ac] != NULL; ac++) {
if (bufsize < 2)
sudo_fatalx(U_("internal error, %s overflow"), __func__);
*cp++ = ' ';
bufsize--;
len = strlcpy(cp, evlog->runargv[ac], bufsize);
if (len >= bufsize)
sudo_fatalx(U_("internal error, %s overflow"), __func__);
cp += len;
bufsize -= len;
}
*newbuf = buf;
debug_return_str(buf);
}
static bool
match_expr(struct search_node_list *head, struct eventlog *evlog, bool last_match)
{
struct search_node *sn;
bool res = false, matched = last_match;
char *tofree;
int rc;
debug_decl(match_expr, SUDO_DEBUG_UTIL);
STAILQ_FOREACH(sn, head, entries) {
switch (sn->type) {
case ST_EXPR:
res = match_expr(&sn->u.expr, evlog, matched);
break;
case ST_CWD:
if (evlog->cwd != NULL)
res = strcmp(sn->u.cwd, evlog->cwd) == 0;
break;
case ST_HOST:
if (evlog->submithost != NULL)
res = strcmp(sn->u.host, evlog->submithost) == 0;
break;
case ST_TTY:
if (evlog->ttyname != NULL)
res = strcmp(sn->u.tty, evlog->ttyname) == 0;
break;
case ST_RUNASGROUP:
if (evlog->rungroup != NULL)
res = strcmp(sn->u.runas_group, evlog->rungroup) == 0;
break;
case ST_RUNASUSER:
if (evlog->runuser != NULL)
res = strcmp(sn->u.runas_user, evlog->runuser) == 0;
break;
case ST_USER:
if (evlog->submituser != NULL)
res = strcmp(sn->u.user, evlog->submituser) == 0;
break;
case ST_PATTERN:
rc = regexec(&sn->u.cmdre, expand_command(evlog, &tofree),
0, NULL, 0);
if (rc && rc != REG_NOMATCH) {
char buf[BUFSIZ];
regerror(rc, &sn->u.cmdre, buf, sizeof(buf));
sudo_fatalx("%s", buf);
}
res = rc == REG_NOMATCH ? 0 : 1;
free(tofree);
break;
case ST_FROMDATE:
res = sudo_timespeccmp(&evlog->event_time, &sn->u.tstamp, >=);
break;
case ST_TODATE:
res = sudo_timespeccmp(&evlog->event_time, &sn->u.tstamp, <=);
break;
default:
sudo_fatalx(U_("unknown search type %d"), sn->type);
/* NOTREACHED */
}
if (sn->negated)
res = !res;
matched = sn->or ? (res || last_match) : (res && last_match);
last_match = matched;
}
debug_return_bool(matched);
}
static int
list_session(struct sudo_lbuf *lbuf, char *log_dir, regex_t *re,
const char *user, const char *tty)
{
struct eventlog *evlog = NULL;
const char *timestr;
int ret = -1;
debug_decl(list_session, SUDO_DEBUG_UTIL);
if ((evlog = iolog_parse_loginfo(-1, log_dir)) == NULL)
goto done;
if (evlog->command == NULL || evlog->submituser == NULL ||
evlog->runuser == NULL) {
goto done;
}
evlog->iolog_file = log_dir + strlen(session_dir) + 1;
/* Match on search expression if there is one. */
if (!STAILQ_EMPTY(&search_expr) && !match_expr(&search_expr, evlog, true))
goto done;
timestr = get_timestr(evlog->event_time.tv_sec, 1);
sudo_lbuf_append_esc(lbuf, LBUF_ESC_CNTRL, "%s : %s : ",
timestr ? timestr : "invalid date", evlog->submituser);
if (eventlog_store_sudo(EVLOG_ACCEPT, evlog, lbuf)) {
puts(lbuf->buf);
ret = 0;
}
done:
lbuf->error = 0;
lbuf->len = 0;
eventlog_free(evlog);
debug_return_int(ret);
}
static int
session_compare(const void *v1, const void *v2)
{
const char *s1 = *(const char **)v1;
const char *s2 = *(const char **)v2;
return strcmp(s1, s2);
}
/* XXX - always returns 0, calls sudo_fatal() on failure */
static int
find_sessions(const char *dir, regex_t *re, const char *user, const char *tty)
{
DIR *d;
struct dirent *dp;
struct stat sb;
struct sudo_lbuf lbuf;
size_t sdlen, sessions_len = 0, sessions_size = 0;
size_t i;
int len;
char pathbuf[PATH_MAX], **sessions = NULL;
#ifdef HAVE_STRUCT_DIRENT_D_TYPE
bool checked_type = true;
#else
const bool checked_type = false;
#endif
debug_decl(find_sessions, SUDO_DEBUG_UTIL);
sudo_lbuf_init(&lbuf, NULL, 0, NULL, 0);
d = opendir(dir);
if (d == NULL)
sudo_fatal(U_("unable to open %s"), dir);
/* XXX - would be faster to use openat() and relative names */
sdlen = strlcpy(pathbuf, dir, sizeof(pathbuf));
if (sdlen + 1 >= sizeof(pathbuf)) {
errno = ENAMETOOLONG;
sudo_fatal("%s/", dir);
}
pathbuf[sdlen++] = '/';
pathbuf[sdlen] = '\0';
/* Store potential session dirs for sorting. */
while ((dp = readdir(d)) != NULL) {
/* Skip "." and ".." */
if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
continue;
#ifdef HAVE_STRUCT_DIRENT_D_TYPE
if (checked_type) {
if (dp->d_type != DT_DIR) {
/* Not all file systems support d_type. */
if (dp->d_type != DT_UNKNOWN)
continue;
checked_type = false;
}
}
#endif
/* Add name to session list. */
if (sessions_len + 1 > sessions_size) {
if (sessions_size == 0)
sessions_size = 36 * 36 / 2;
sessions = reallocarray(sessions, sessions_size, 2 * sizeof(char *));
if (sessions == NULL)
sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
sessions_size *= 2;
}
if ((sessions[sessions_len] = strdup(dp->d_name)) == NULL)
sudo_fatalx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
sessions_len++;
}
closedir(d);
/* Sort and list the sessions. */
if (sessions != NULL) {
qsort(sessions, sessions_len, sizeof(char *), session_compare);
for (i = 0; i < sessions_len; i++) {
len = snprintf(&pathbuf[sdlen], sizeof(pathbuf) - sdlen,
"%s/log", sessions[i]);
if (len < 0 || (size_t)len >= sizeof(pathbuf) - sdlen) {
errno = ENAMETOOLONG;
sudo_fatal("%s/%s/log", dir, sessions[i]);
}
free(sessions[i]);
/* Check for dir with a log file. */
if (lstat(pathbuf, &sb) == 0 && S_ISREG(sb.st_mode)) {
pathbuf[sdlen + (size_t)len - 4] = '\0';
list_session(&lbuf, pathbuf, re, user, tty);
} else {
/* Strip off "/log" and recurse if a non-log dir. */
pathbuf[sdlen + (size_t)len - 4] = '\0';
if (checked_type ||
(lstat(pathbuf, &sb) == 0 && S_ISDIR(sb.st_mode)))
find_sessions(pathbuf, re, user, tty);
}
}
free(sessions);
}
sudo_lbuf_destroy(&lbuf);
debug_return_int(0);
}
/* XXX - always returns 0, calls sudo_fatal() on failure */
static int
list_sessions(int argc, char **argv, const char *pattern, const char *user,
const char *tty)
{
regex_t rebuf, *re = NULL;
const char *errstr;
debug_decl(list_sessions, SUDO_DEBUG_UTIL);
/* Parse search expression if present */
parse_expr(&search_expr, argv, false);
/* optional regex */
if (pattern) {
re = &rebuf;
if (!sudo_regex_compile(re, pattern, &errstr)) {
sudo_fatalx(U_("invalid regular expression \"%s\": %s"),
pattern, U_(errstr));
}
}
debug_return_int(find_sessions(session_dir, re, user, tty));
}
/*
* Check keyboard for ' ', '<', '>', return
* pause, slow, fast, next
*/
static void
read_keyboard(int fd, int what, void *v)
{
struct replay_closure *closure = v;
static bool paused = false;
struct timespec ts;
ssize_t nread;
char ch;
debug_decl(read_keyboard, SUDO_DEBUG_UTIL);
nread = read(fd, &ch, 1);
switch (nread) {
case -1:
if (errno != EINTR && errno != EAGAIN)
sudo_fatal(U_("unable to read %s"), "stdin");
break;
case 0:
/* Ignore EOF. */
break;
default:
if (paused) {
/* Any key will unpause, run the delay callback directly. */
paused = false;
delay_cb(-1, SUDO_EV_TIMEOUT, closure);
debug_return;
}
switch (ch) {
case ' ':
paused = true;
/* Disable the delay event until we unpause. */
sudo_ev_del(closure->evbase, closure->delay_ev);
break;
case '<':
speed_factor /= 2;
if (sudo_ev_pending(closure->delay_ev, SUDO_EV_TIMEOUT, &ts)) {
/* Double remaining timeout. */
ts.tv_sec *= 2;
ts.tv_nsec *= 2;
if (ts.tv_nsec >= 1000000000) {
ts.tv_sec++;
ts.tv_nsec -= 1000000000;
}
if (sudo_ev_add(NULL, closure->delay_ev, &ts, false) == -1) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"failed to double remaining delay timeout");
}
}
break;
case '>':
speed_factor *= 2;
if (sudo_ev_pending(closure->delay_ev, SUDO_EV_TIMEOUT, &ts)) {
/* Halve remaining timeout. */
if (ts.tv_sec & 1)
ts.tv_nsec += 500000000;
ts.tv_sec /= 2;
ts.tv_nsec /= 2;
if (sudo_ev_add(NULL, closure->delay_ev, &ts, false) == -1) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"failed to halve remaining delay timeout");
}
}
break;
case '\r':
case '\n':
/* Cancel existing delay, run callback directly. */
sudo_ev_del(closure->evbase, closure->delay_ev);
delay_cb(-1, SUDO_EV_TIMEOUT, closure);
break;
default:
/* Unknown key, nothing to do. */
break;
}
break;
}
debug_return;
}
static void
display_usage(FILE *fp)
{
fprintf(fp, _("usage: %s [-hnRS] [-d dir] [-m num] [-s num] ID\n"),
getprogname());
fprintf(fp, _("usage: %s [-h] [-d dir] -l [search expression]\n"),
getprogname());
}
sudo_noreturn static void
usage(void)
{
display_usage(stderr);
exit(EXIT_FAILURE);
}
sudo_noreturn static void
help(void)
{
(void) printf(_("%s - replay sudo session logs\n\n"), getprogname());
display_usage(stdout);
(void) puts(_("\nOptions:\n"
" -d, --directory=dir specify directory for session logs\n"
" -f, --filter=filter specify which I/O type(s) to display\n"
" -h, --help display help message and exit\n"
" -l, --list list available session IDs, with optional expression\n"
" -m, --max-wait=num max number of seconds to wait between events\n"
" -n, --non-interactive no prompts, session is sent to the standard output\n"
" -R, --no-resize do not attempt to re-size the terminal\n"
" -S, --suspend-wait wait while the command was suspended\n"
" -s, --speed=num speed up or slow down output\n"
" -V, --version display version information and exit"));
exit(EXIT_SUCCESS);
}
/*
* Cleanup hook for sudo_fatal()/sudo_fatalx()
*/
static void
sudoreplay_cleanup(void)
{
restore_terminal_size();
sudo_term_restore(ttyfd, false);
}
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