91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* No copyright is claimed. This code is in the public domain; do with
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* it what you wish.
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*
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* Written by Daan De Meyer <daan.j.demeyer@gmail.com>
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*/
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include "closestream.h"
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static void __attribute__((__noreturn__)) usage(void)
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{
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FILE *out = stdout;
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fputs(USAGE_HEADER, out);
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fprintf(out, _(
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" %s [options] <program> [<argument>...]\n"),
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program_invocation_short_name);
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fputs(USAGE_SEPARATOR, out);
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fputs(_("Run a program in a new process group.\n"), out);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -f, --foreground Make a foreground process group\n"), out);
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fprintf(out, USAGE_HELP_OPTIONS(21));
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fprintf(out, USAGE_MAN_TAIL("setpgid(1)"));
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exit(EXIT_SUCCESS);
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}
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int main(int argc, char **argv)
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{
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int ch, foreground = 0, fd;
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sigset_t s, old;
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static const struct option longopts[] = {
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{"foreground", no_argument, NULL, 'f'},
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{"version", no_argument, NULL, 'V'},
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{"help", no_argument, NULL, 'h'},
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{NULL, 0, NULL, 0}
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};
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setlocale(LC_ALL, "");
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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close_stdout_atexit();
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while ((ch = getopt_long(argc, argv, "+fVh", longopts, NULL)) != -1)
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switch (ch) {
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case 'f':
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foreground = 1;
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break;
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case 'h':
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usage();
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case 'V':
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print_version(EXIT_SUCCESS);
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default:
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errtryhelp(EXIT_FAILURE);
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}
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if (argc - optind < 1) {
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warnx(_("no command specified"));
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errtryhelp(EXIT_FAILURE);
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}
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if (setpgid(0, 0) < 0)
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err(EXIT_FAILURE, _("setpgid failed"));
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if (foreground) {
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fd = open("/dev/tty", O_RDONLY|O_CLOEXEC);
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if (fd >= 0) {
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if (sigemptyset(&s) < 0)
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err(EXIT_FAILURE, _("sigemptyset failed"));
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if (sigaddset(&s, SIGTTOU) < 0)
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err(EXIT_FAILURE, _("sigaddset failed"));
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if (sigprocmask(SIG_BLOCK, &s, &old) < 0)
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err(EXIT_FAILURE, _("sigprocmask failed"));
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if (tcsetpgrp(fd, getpgid(0)) < 0)
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err(EXIT_FAILURE, _("tcsetpgrp failed"));
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if (sigprocmask(SIG_SETMASK, &old, NULL) < 0)
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err(EXIT_FAILURE, _("sigprocmask failed"));
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}
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}
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execvp(argv[optind], argv + optind);
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errexec(argv[optind]);
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}
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