+++ /dev/null
-/*++
- * NAME
- * timeout 1
- * SUMMARY
- * run command with bounded time
- * SYNOPSIS
- * \fBtimeout\fR [-\fIsignal\fR] \fItime\fR \fIcommand\fR ...
- * DESCRIPTION
- * \fBtimeout\fR executes a command and imposes an elapsed time limit.
- * The command is run in a separate POSIX process group so that the
- * right thing happens with commands that spawn child processes.
- *
- * Arguments:
- * .IP \fI-signal\fR
- * Specify an optional signal to send to the controlled process.
- * By default, \fBtimeout\fR sends SIGKILL, which cannot be caught
- * or ignored.
- * .IP \fItime\fR
- * The elapsed time limit after which the command is terminated.
- * .IP \fIcommand\fR
- * The command to be executed.
- * DIAGNOSTICS
- * The command exit status is the exit status of the command
- * (status 1 in case of a usage error).
- * AUTHOR(S)
- * Wietse Venema
- * This program is part of SATAN.
- *--
- */
-
-/* System libraries. */
-
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-
-extern int optind;
-
-/* Application-specific. */
-
-#define perrorexit(s) { perror(s); exit(1); }
-#define WRITE(x) write(2, x, strlen(x))
-
-static int kill_signal = SIGKILL;
-static char *progname;
-static char *commandname;
-
-// fmt_ulong and fmt_long from libowfat {{{
-unsigned int fmt_ulong(char *dest,unsigned long i) {
- register unsigned long len,tmp,len2;
- /* first count the number of bytes needed */
- for (len=1, tmp=i; tmp>9; ++len) tmp/=10;
- if (dest)
- for (tmp=i, dest+=len, len2=len+1; --len2; tmp/=10)
- *--dest = (tmp%10)+'0';
- return len;
-}
-
-unsigned int fmt_long(char *dest,long int i) {
- if (i<0) {
- if (dest) *dest++='-';
- return fmt_ulong(dest,-i)+1;
- } else
- return fmt_ulong(dest,i);
-}
-// }}}
-
-static void usage()
-{
- //fprintf(stderr, "usage: %s [-signal] time command...\n", progname);
- WRITE("usage: ");
- WRITE(progname);
- WRITE(" [-signal] time command...\n");
- exit(1);
-}
-
-static void terminate(int sig)
-{
- signal(kill_signal, SIG_DFL);
- //fprintf(stderr, "Timeout: aborting command ``%s'' with signal %d\n",
- // commandname, kill_signal);
- char kill_signal_string[22];
- fmt_long(kill_signal_string, kill_signal);
- WRITE("Timeout: aborting command ``");
- WRITE(commandname);
- WRITE("'' with signal ");
- WRITE(kill_signal_string);
- WRITE("\n");
- kill(0, kill_signal);
-}
-
-int main(int argc, char** argv)
-{
- int time_to_run = 0;
- pid_t pid;
- pid_t child_pid;
- int status;
-
- progname = argv[0];
-
- /*
- * Parse JCL.
- */
- while (--argc && *++argv && **argv == '-')
- if ((kill_signal = atoi(*argv + 1)) <= 0)
- usage();
-
- if (argc < 2 || (time_to_run = atoi(argv[0])) <= 0)
- usage();
-
- commandname = argv[1];
-
- /*
- * Run the command and its watchdog in a separate process group so that
- * both can be killed off with one signal.
- */
- setsid();
- switch (child_pid = fork()) {
- case -1: /* error */
- perrorexit("timeout: fork");
- case 0: /* run controlled command */
- execvp(argv[1], argv + 1);
- perrorexit(argv[1]);
- default: /* become watchdog */
- (void) signal(SIGHUP, terminate);
- (void) signal(SIGINT, terminate);
- (void) signal(SIGQUIT, terminate);
- (void) signal(SIGTERM, terminate);
- (void) signal(SIGALRM, terminate);
- alarm(time_to_run);
- while ((pid = wait(&status)) != -1 && pid != child_pid)
- /* void */ ;
- return (pid == child_pid ? status : -1);
- }
-}
-
-// vim: foldmethod=marker