LXR toybox/toys/other/timeout.c

   1/* timeout.c - Run command line with a timeout
   2 *
   3 * Copyright 2013 Rob Landley <rob@landley.net>
   4 *
   5 * No standard
   6
   7USE_TIMEOUT(NEWTOY(timeout, "<2^vk:s: ", TOYFLAG_BIN))
   8
   9config TIMEOUT
  10  bool "timeout"
  11  default y
  12  depends on TOYBOX_FLOAT
  13  help
  14    usage: timeout [-k LENGTH] [-s SIGNAL] LENGTH COMMAND...
  15
  16    Run command line as a child process, sending child a signal if the
  17    command doesn't exit soon enough.
  18
  19    Length can be a decimal fraction. An optional suffix can be "m"
  20    (minutes), "h" (hours), "d" (days), or "s" (seconds, the default).
  21
  22    -s  Send specified signal (default TERM)
  23    -k  Send KILL signal if child still running this long after first signal
  24    -v  Verbose
  25*/
  26
  27#define FOR_timeout
  28#include "toys.h"
  29
  30GLOBALS(
  31  char *s_signal;
  32  char *k_timeout;
  33
  34  int nextsig;
  35  pid_t pid;
  36  struct timeval ktv;
  37  struct itimerval itv;
  38)
  39
  40static void handler(int i)
  41{
  42  if (toys.optflags & FLAG_v)
  43    fprintf(stderr, "timeout pid %d signal %d\n", TT.pid, TT.nextsig);
  44  kill(TT.pid, TT.nextsig);
  45  
  46  if (TT.k_timeout) {
  47    TT.k_timeout = 0;
  48    TT.nextsig = SIGKILL;
  49    xsignal(SIGALRM, handler);
  50    TT.itv.it_value = TT.ktv;
  51    setitimer(ITIMER_REAL, &TT.itv, (void *)toybuf);
  52  }
  53}
  54
  55void timeout_main(void)
  56{
  57  // Parse early to get any errors out of the way.
  58  TT.itv.it_value.tv_sec = xparsetime(*toys.optargs, 1000000, &TT.itv.it_value.tv_usec);
  59
  60  if (TT.k_timeout)
  61    TT.ktv.tv_sec = xparsetime(TT.k_timeout, 1000000, &TT.ktv.tv_usec);
  62  TT.nextsig = SIGTERM;
  63  if (TT.s_signal && -1 == (TT.nextsig = sig_to_num(TT.s_signal)))
  64    error_exit("bad -s: '%s'", TT.s_signal);
  65
  66  if (!(TT.pid = XVFORK())) xexec(toys.optargs+1);
  67  else {
  68    xsignal(SIGALRM, handler);
  69    setitimer(ITIMER_REAL, &TT.itv, (void *)toybuf);
  70    toys.exitval = xwaitpid(TT.pid);
  71  }
  72}
  73