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- /* timeout.c - Run command line with a timeout
- *
- * Copyright 2013 Rob Landley <rob@landley.net>
- *
- * No standard
- USE_TIMEOUT(NEWTOY(timeout, "<2^(foreground)(preserve-status)vk:s(signal):", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_ARGFAIL(125)))
- config TIMEOUT
- bool "timeout"
- default y
- help
- usage: timeout [-k DURATION] [-s SIGNAL] DURATION COMMAND...
- Run command line as a child process, sending child a signal if the
- command doesn't exit soon enough.
- DURATION can be a decimal fraction. An optional suffix can be "m"
- (minutes), "h" (hours), "d" (days), or "s" (seconds, the default).
- -s Send specified signal (default TERM)
- -k Send KILL signal if child still running this long after first signal
- -v Verbose
- --foreground Don't create new process group
- --preserve-status Exit with the child's exit status
- */
- #define FOR_timeout
- #include "toys.h"
- GLOBALS(
- char *s, *k;
- int nextsig;
- pid_t pid;
- struct timespec kts;
- struct itimerspec its;
- timer_t timer;
- )
- static void handler(int i)
- {
- if (FLAG(v))
- fprintf(stderr, "timeout pid %d signal %d\n", TT.pid, TT.nextsig);
- toys.exitval = (TT.nextsig==9) ? 137 : 124;
- kill(TT.pid, TT.nextsig);
- if (TT.k) {
- TT.k = 0;
- TT.nextsig = SIGKILL;
- xsignal(SIGALRM, handler);
- TT.its.it_value = TT.kts;
- if (timer_settime(TT.timer, 0, &TT.its, 0)) perror_exit("timer_settime");
- }
- }
- void timeout_main(void)
- {
- struct sigevent se = { .sigev_notify = SIGEV_SIGNAL, .sigev_signo = SIGALRM };
- // Use same ARGFAIL value for any remaining parsing errors
- toys.exitval = 125;
- xparsetimespec(*toys.optargs, &TT.its.it_value);
- if (TT.k) xparsetimespec(TT.k, &TT.kts);
- TT.nextsig = SIGTERM;
- if (TT.s && -1 == (TT.nextsig = sig_to_num(TT.s)))
- error_exit("bad -s: '%s'", TT.s);
- if (!FLAG(foreground)) setpgid(0, 0);
- toys.exitval = 0;
- if (!(TT.pid = XVFORK())) xexec(toys.optargs+1);
- else {
- int status;
- xsignal(SIGALRM, handler);
- if (timer_create(CLOCK_MONOTONIC, &se, &TT.timer)) perror_exit("timer");
- if (timer_settime(TT.timer, 0, &TT.its, 0)) perror_exit("timer_settime");
- status = xwaitpid(TT.pid);
- if (FLAG(preserve_status) || !toys.exitval) toys.exitval = status;
- }
- }
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