Hi,
FreeBSD/NetBSD/DragonFly and GNU 'coreutils' have a utility called
timeout(1) which allows you to kill a process after X time.
Importing timeout would remove the only reason I have coreutils
installed :-)
I retrieved timeout.{c,1} from
http://cvsweb.netbsd.org/bsdweb.cgi/src/usr.bin/timeout/?only_with_tag=MAIN
and make two between what I copied from netbsd and what is below:
* changed 'sys_nsig' to 'NSIG' (thanks millert for the hint)
* appled style(9) in a few places
Thoughts?
Kind regards,
Job
Index: timeout/Makefile
===================================================================
RCS file: timeout/Makefile
diff -N timeout/Makefile
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ timeout/Makefile 1 Sep 2021 15:08:57 -0000
@@ -0,0 +1,5 @@
+# $OpenBSD: Makefile,v 1.3 1997/09/21 11:51:14 deraadt Exp $
+
+PROG= timeout
+
+.include <bsd.prog.mk>
Index: timeout/timeout.1
===================================================================
RCS file: timeout/timeout.1
diff -N timeout/timeout.1
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ timeout/timeout.1 1 Sep 2021 15:08:57 -0000
@@ -0,0 +1,133 @@
+.\" $NetBSD: timeout.1,v 1.4 2016/10/13 06:22:26 dholland Exp $
+.\"
+.\" Copyright (c) 2014 Baptiste Daroussin <b...@freebsd.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD: head/usr.bin/timeout/timeout.1 268861 2014-07-18 22:56:59Z bapt $
+.\"
+.Dd July 19, 2014
+.Dt TIMEOUT 1
+.Os
+.Sh NAME
+.Nm timeout
+.Nd run a command with a time limit
+.Sh SYNOPSIS
+.Nm
+.Op Fl Fl signal Ar sig | Fl s Ar sig
+.Op Fl Fl preserve-status
+.Op Fl Fl kill-after Ar time | Fl k Ar time
+.Op Fl Fl foreground
+.Ao Ar duration Ac
+.Ao Ar command Ac
+.Ao Ar args ... Ac
+.Sh DESCRIPTION
+.Nm
+starts the
+.Ar command
+with its
+.Ar args .
+If
+.Ar command
+is still running after
+.Ar duration ,
+it is killed.
+By default,
+.Dv SIGTERM
+is sent.
+.Bl -tag -width "-k time, --kill-after time"
+.It Fl Fl preserve-status
+Always exits with the same status as
+.Ar command
+even if it times out.
+.It Fl Fl foreground
+Do not propagate timeout to the
+.Ar command
+children.
+.It Fl s Ar sig , Fl Fl signal Ar sig
+Specify the signal to send on timeout.
+By default,
+.Dv SIGTERM
+is sent.
+.It Fl k Ar time , Fl Fl kill-after Ar time
+Send a second kill signal if
+.Ar command
+is still running after
+.Ar time
+after the first signal was sent.
+.El
+.Sh DURATION FORMAT
+.Ar duration
+and
+.Ar time
+can be integer or decimal numbers.
+Values without unit symbols are interpreted as seconds.
+.Pp
+Supported unit symbols are:
+.Bl -tag -width indent -compact
+.It s
+seconds
+.It m
+minutes
+.It h
+hours
+.It d
+days
+.El
+.Sh EXIT STATUS
+If the timeout was not reached, the exit status of
+.Ar command
+is returned.
+.Pp
+If the timeout was reached and
+.Fl Fl preserve-status
+is set, the exit status of
+.Ar command
+is returned.
+If
+.Fl Fl preserve-status
+is not set, an exit status of 124 is returned.
+.Pp
+If
+.Ar command
+exits after receiving a signal, the exit status returned is the signal number
plus 128.
+.Sh SEE ALSO
+.Xr kill 1 ,
+.Xr signal 3
+.Sh HISTORY
+A
+.Nm
+utility appeared in a development branch of
+.Fx 11
+and was imported into
+.Nx 7 .
+The
+.Fx
+work is compatible with GNU
+.Nm
+by
+.An Padraig Brady ,
+from GNU Coreutils 8.21.
+The
+.Nm
+utility first appeared in GNU Coreutils 7.0.
Index: timeout/timeout.c
===================================================================
RCS file: timeout/timeout.c
diff -N timeout/timeout.c
--- /dev/null 1 Jan 1970 00:00:00 -0000
+++ timeout/timeout.c 1 Sep 2021 15:08:57 -0000
@@ -0,0 +1,349 @@
+/* $NetBSD: timeout.c,v 1.4 2014/08/05 08:20:02 christos Exp $ */
+
+/*-
+ * Copyright (c) 2014 Baptiste Daroussin <b...@freebsd.org>
+ * Copyright (c) 2014 Vsevolod Stakhov <vsevo...@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer
+ * in this position and unchanged.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#define EXIT_TIMEOUT 124
+
+static sig_atomic_t sig_chld = 0;
+static sig_atomic_t sig_term = 0;
+static sig_atomic_t sig_alrm = 0;
+static sig_atomic_t sig_ign = 0;
+
+static void __dead
+usage(void)
+{
+ fprintf(stderr, "Usage: %s [--signal sig | -s sig] [--preserve-status]"
+ " [--kill-after time | -k time] [--foreground] <duration> <command>"
+ " <arg ...>\n", getprogname());
+
+ exit(EX_USAGE);
+}
+
+static double
+parse_duration(const char *duration)
+{
+ double ret;
+ char *end;
+
+ ret = strtod(duration, &end);
+ if (ret == 0 && end == duration)
+ errx(EXIT_FAILURE, "invalid duration");
+
+ if (end == NULL || *end == '\0')
+ return (ret);
+
+ if (end != NULL && *(end + 1) != '\0')
+ errx(EX_USAGE, "invalid duration");
+
+ switch (*end) {
+ case 's':
+ break;
+ case 'm':
+ ret *= 60;
+ break;
+ case 'h':
+ ret *= 60 * 60;
+ break;
+ case 'd':
+ ret *= 60 * 60 * 24;
+ break;
+ default:
+ errx(EX_USAGE, "invalid duration");
+ }
+
+ if (ret < 0 || ret >= 100000000UL)
+ errx(EX_USAGE, "invalid duration");
+
+ return (ret);
+}
+
+static int
+parse_signal(const char *str)
+{
+ char *ep;
+ int i;
+ long sig;
+
+ if (strncasecmp(str, "SIG", 3) == 0) {
+ str += 3;
+
+ for (i = 1; i < NSIG; i++) {
+ if (strcasecmp(str, sys_signame[i]) == 0)
+ return (i);
+ }
+
+ goto err;
+ }
+
+ errno = 0;
+ sig = strtol(str, &ep, 10);
+
+ if (str[0] == '\0' || *ep != '\0')
+ goto err;
+ if (errno == ERANGE && (sig == LONG_MAX || sig == LONG_MIN))
+ goto err;
+ if (sig >= NSIG || sig < 0)
+ goto err;
+
+ return (int)sig;
+
+err:
+ errx(EX_USAGE, "invalid signal");
+}
+
+static void
+sig_handler(int signo)
+{
+ if (sig_ign != 0 && signo == sig_ign) {
+ sig_ign = 0;
+ return;
+ }
+
+ switch(signo) {
+ case 0:
+ case SIGINT:
+ case SIGHUP:
+ case SIGQUIT:
+ case SIGTERM:
+ sig_term = signo;
+ break;
+ case SIGCHLD:
+ sig_chld = 1;
+ break;
+ case SIGALRM:
+ sig_alrm = 1;
+ break;
+ }
+}
+
+static void
+set_interval(double iv)
+{
+ struct itimerval tim;
+
+ memset(&tim, 0, sizeof(tim));
+ tim.it_value.tv_sec = (time_t)iv;
+ iv -= (double)tim.it_value.tv_sec;
+ tim.it_value.tv_usec = (suseconds_t)(iv * 1000000UL);
+
+ if (setitimer(ITIMER_REAL, &tim, NULL) == -1)
+ err(EX_OSERR, "setitimer()");
+}
+
+int
+main(int argc, char **argv)
+{
+ int ch;
+ unsigned long i;
+ int foreground, preserve;
+ int error, pstat, status;
+ int killsig = SIGTERM;
+ pid_t pgid, pid, cpid;
+ double first_kill;
+ double second_kill;
+ bool timedout = false;
+ bool do_second_kill = false;
+ struct sigaction signals;
+ int signums[] = {
+ -1,
+ SIGTERM,
+ SIGINT,
+ SIGHUP,
+ SIGCHLD,
+ SIGALRM,
+ SIGQUIT,
+ };
+
+ setprogname(argv[0]);
+
+ foreground = preserve = 0;
+ second_kill = 0;
+ cpid = -1;
+ pgid = -1;
+
+ const struct option longopts[] = {
+ { "preserve-status", no_argument, &preserve, 1 },
+ { "foreground", no_argument, &foreground, 1 },
+ { "kill-after", required_argument, NULL, 'k'},
+ { "signal", required_argument, NULL, 's'},
+ { "help", no_argument, NULL, 'h'},
+ { NULL, 0, NULL, 0 }
+ };
+
+ while ((ch = getopt_long(argc, argv, "+k:s:h", longopts, NULL)) != -1) {
+ switch (ch) {
+ case 'k':
+ do_second_kill = true;
+ second_kill = parse_duration(optarg);
+ break;
+ case 's':
+ killsig = parse_signal(optarg);
+ break;
+ case 0:
+ break;
+ case 'h':
+ default:
+ usage();
+ break;
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 2)
+ usage();
+
+ first_kill = parse_duration(argv[0]);
+ argc--;
+ argv++;
+
+ if (!foreground) {
+ pgid = setpgid(0,0);
+
+ if (pgid == -1)
+ err(EX_OSERR, "setpgid()");
+ }
+
+ memset(&signals, 0, sizeof(signals));
+ sigemptyset(&signals.sa_mask);
+
+ if (killsig != SIGKILL && killsig != SIGSTOP)
+ signums[0] = killsig;
+
+ for (i = 0; i < sizeof(signums) / sizeof(signums[0]); i ++)
+ sigaddset(&signals.sa_mask, signums[i]);
+
+ signals.sa_handler = sig_handler;
+ signals.sa_flags = SA_RESTART;
+
+ for (i = 0; i < sizeof(signums) / sizeof(signums[0]); i ++) {
+ if (signums[i] != -1 && signums[i] != 0 &&
+ sigaction(signums[i], &signals, NULL) == -1)
+ err(EX_OSERR, "sigaction()");
+ }
+
+ signal(SIGTTIN, SIG_IGN);
+ signal(SIGTTOU, SIG_IGN);
+
+ pid = fork();
+ if (pid == -1)
+ err(EX_OSERR, "fork()");
+ else if (pid == 0) {
+ /* child process */
+ signal(SIGTTIN, SIG_DFL);
+ signal(SIGTTOU, SIG_DFL);
+
+ error = execvp(argv[0], argv);
+ if (error == -1)
+ err(EX_UNAVAILABLE, "exec()");
+ }
+
+ if (sigprocmask(SIG_BLOCK, &signals.sa_mask, NULL) == -1)
+ err(EX_OSERR, "sigprocmask()");
+
+ /* parent continues here */
+ set_interval(first_kill);
+
+ for (;;) {
+ sigemptyset(&signals.sa_mask);
+ sigsuspend(&signals.sa_mask);
+
+ if (sig_chld) {
+ sig_chld = 0;
+ while (((cpid = wait(&status)) < 0) && errno == EINTR)
+ continue;
+
+ if (cpid == pid) {
+ pstat = status;
+ break;
+ }
+ } else if (sig_alrm) {
+ sig_alrm = 0;
+
+ timedout = true;
+ if (!foreground)
+ killpg(pgid, killsig);
+ else
+ kill(pid, killsig);
+
+ if (do_second_kill) {
+ set_interval(second_kill);
+ second_kill = 0;
+ sig_ign = killsig;
+ killsig = SIGKILL;
+ } else
+ break;
+
+ } else if (sig_term) {
+ if (!foreground)
+ killpg(pgid, killsig);
+ else
+ kill(pid, (int)sig_term);
+
+ if (do_second_kill) {
+ set_interval(second_kill);
+ second_kill = 0;
+ sig_ign = killsig;
+ killsig = SIGKILL;
+ } else
+ break;
+ }
+ }
+
+ while (cpid != pid && wait(&pstat) == -1) {
+ if (errno != EINTR)
+ err(EX_OSERR, "waitpid()");
+ }
+
+ if (WEXITSTATUS(pstat))
+ pstat = WEXITSTATUS(pstat);
+ else if(WIFSIGNALED(pstat))
+ pstat = 128 + WTERMSIG(pstat);
+
+ if (timedout && !preserve)
+ pstat = EXIT_TIMEOUT;
+
+ return (pstat);
+}
