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/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*
* Written by Daan De Meyer <daan.j.demeyer@gmail.com>
*/
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include "closestream.h"
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out, _(
" %s [options] <program> [arguments ...]\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Run a program in a new process group.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -f, --foregound Make a foreground process group\n"), out);
fprintf(out, USAGE_HELP_OPTIONS(16));
fprintf(out, USAGE_MAN_TAIL("setpgid(1)"));
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
int ch, foreground = 0, fd;
sigset_t s, old;
static const struct option longopts[] = {
{"foreground", no_argument, NULL, 'f'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
while ((ch = getopt_long(argc, argv, "+Vh", longopts, NULL)) != -1)
switch (ch) {
case 'f':
foreground = 1;
break;
case 'h':
usage();
case 'V':
print_version(EXIT_SUCCESS);
default:
errtryhelp(EXIT_FAILURE);
}
if (argc - optind < 1) {
warnx(_("no command specified"));
errtryhelp(EXIT_FAILURE);
}
if (setpgid(0, 0) < 0)
err(EXIT_FAILURE, _("setpgid failed"));
if (foreground) {
fd = open("/dev/tty", O_RDONLY|O_CLOEXEC);
if (fd >= 0) {
if (sigemptyset(&s) < 0)
err(EXIT_FAILURE, _("sigemptyset failed"));
if (sigaddset(&s, SIGTTOU) < 0)
err(EXIT_FAILURE, _("sigaddset failed"));
if (sigprocmask(SIG_BLOCK, &s, &old) < 0)
err(EXIT_FAILURE, _("sigprocmask failed"));
if (tcsetpgrp(fd, getpgid(0)) < 0)
err(EXIT_FAILURE, _("tcsetpgrp failed"));
if (sigprocmask(SIG_SETMASK, &old, NULL) < 0)
err(EXIT_FAILURE, _("sigprocmask failed"));
}
}
execvp(argv[optind], argv + optind);
errexec(argv[optind]);
}
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