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91 lines
2.3 KiB
91 lines
2.3 KiB
/* timeout.c - Run command line with a timeout
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*
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* Copyright 2013 Rob Landley <rob@landley.net>
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*
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* No standard
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USE_TIMEOUT(NEWTOY(timeout, "<2^(foreground)(preserve-status)vk:s(signal):", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_ARGFAIL(125)))
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config TIMEOUT
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bool "timeout"
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default y
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help
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usage: timeout [-k DURATION] [-s SIGNAL] DURATION COMMAND...
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Run command line as a child process, sending child a signal if the
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command doesn't exit soon enough.
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DURATION can be a decimal fraction. An optional suffix can be "m"
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(minutes), "h" (hours), "d" (days), or "s" (seconds, the default).
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-s Send specified signal (default TERM)
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-k Send KILL signal if child still running this long after first signal
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-v Verbose
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--foreground Don't create new process group
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--preserve-status Exit with the child's exit status
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*/
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#define FOR_timeout
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#include "toys.h"
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GLOBALS(
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char *s, *k;
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int nextsig;
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pid_t pid;
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struct timeval ktv;
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struct itimerval itv;
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)
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static void handler(int i)
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{
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if (FLAG(v))
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fprintf(stderr, "timeout pid %d signal %d\n", TT.pid, TT.nextsig);
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toys.exitval = (TT.nextsig==9) ? 137 : 124;
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kill(TT.pid, TT.nextsig);
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if (TT.k) {
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TT.k = 0;
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TT.nextsig = SIGKILL;
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xsignal(SIGALRM, handler);
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TT.itv.it_value = TT.ktv;
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setitimer(ITIMER_REAL, &TT.itv, (void *)toybuf);
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}
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}
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// timeval inexplicably makes up a new type for microseconds, despite timespec's
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// nanoseconds field (needing to store 1000* the range) using "long". Bravo.
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static void xparsetimeval(char *s, struct timeval *tv)
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{
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long ll;
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tv->tv_sec = xparsetime(s, 6, &ll);
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tv->tv_usec = ll;
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}
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void timeout_main(void)
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{
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// Use same ARGFAIL value for any remaining parsing errors
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toys.exitval = 125;
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xparsetimeval(*toys.optargs, &TT.itv.it_value);
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if (TT.k) xparsetimeval(TT.k, &TT.ktv);
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TT.nextsig = SIGTERM;
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if (TT.s && -1 == (TT.nextsig = sig_to_num(TT.s)))
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error_exit("bad -s: '%s'", TT.s);
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if (!FLAG(foreground)) setpgid(0, 0);
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toys.exitval = 0;
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if (!(TT.pid = XVFORK())) xexec(toys.optargs+1);
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else {
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int status;
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xsignal(SIGALRM, handler);
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setitimer(ITIMER_REAL, &TT.itv, (void *)toybuf);
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status = xwaitpid(TT.pid);
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if (FLAG(preserve_status) || !toys.exitval) toys.exitval = status;
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}
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}
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