106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/* Program execution for Emacs.
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Copyright (C) 2023-2024 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <sys/wait.h>
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#include "exec.h"
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static void
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print_usage (void)
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{
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fprintf (stderr, "test loader-name program [args...]\n"
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"Run the given program using the specified loader.\n");
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}
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extern char **environ;
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/* This program uses libexec to wrap the execution of a child
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process. */
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int
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main (int argc, char **argv)
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{
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pid_t pid, child;
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int sig;
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sigset_t sigset;
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/* Check that there are a sufficient number of arguments. */
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if (argc < 3)
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{
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print_usage ();
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return 1;
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}
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exec_init (argv[1]);
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/* Block SIGCHLD to avoid reentrant modification of the child
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process list. */
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sigemptyset (&sigset);
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sigaddset (&sigset, SIGCHLD);
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sigprocmask (SIG_BLOCK, &sigset, NULL);
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if (!(pid = fork ()))
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{
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tracing_execve (argv[2], argv + 2, environ);
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fprintf (stderr, "tracing_execve: %s\n",
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strerror (errno));
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exit (1);
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}
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else if (after_fork (pid))
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{
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fprintf (stderr, "after_fork: %s\n",
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strerror (errno));
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exit (1);
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}
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/* Now start waiting for child processes to exit. */
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while (true)
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{
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child = exec_waitpid (-1, &sig, 0);
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/* If pid is -1, a system call has been handled. */
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if (child == -1)
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continue;
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/* If the main process exits, then exit as well. */
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if (child == pid && !WIFSTOPPED (sig))
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return (WIFEXITED (sig)
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? WEXITSTATUS (sig)
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: WTERMSIG (sig));
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}
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}
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