99 lines
2.0 KiB
C
99 lines
2.0 KiB
C
/*
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* setsid.c -- execute a command in a new session
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* Rick Sladkey <jrs@world.std.com>
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* In the public domain.
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*
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* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
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* - added Native Language Support
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*
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* 2001-01-18 John Fremlin <vii@penguinpowered.com>
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* - fork in case we are process group leader
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*
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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 <sys/ioctl.h>
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#include "c.h"
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#include "nls.h"
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#include "closestream.h"
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static void __attribute__ ((__noreturn__)) usage(FILE * out)
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{
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fputs(USAGE_HEADER, out);
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fprintf(out, _(
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" %s [options] <program> [arguments ...]\n"),
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program_invocation_short_name);
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fputs(USAGE_OPTIONS, out);
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fputs(_(" -c, --ctty set the controlling terminal to the current one\n"),
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out);
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fputs(USAGE_HELP, out);
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fputs(USAGE_VERSION, out);
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fprintf(out, USAGE_MAN_TAIL("setsid(1)"));
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exit(out == stderr ? EXIT_FAILURE : 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;
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int ctty = 0;
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static const struct option longopts[] = {
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{"ctty", no_argument, NULL, 'c'},
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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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atexit(close_stdout);
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while ((ch = getopt_long(argc, argv, "+Vhc", longopts, NULL)) != -1)
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switch (ch) {
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case 'V':
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printf(UTIL_LINUX_VERSION);
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return EXIT_SUCCESS;
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case 'c':
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ctty=1;
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break;
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case 'h':
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usage(stdout);
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default:
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usage(stderr);
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}
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if (argc < 2)
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usage(stderr);
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if (getpgrp() == getpid()) {
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switch (fork()) {
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case -1:
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err(EXIT_FAILURE, _("fork"));
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case 0:
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/* child */
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break;
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default:
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/* parent */
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return 0;
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}
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}
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if (setsid() < 0)
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/* cannot happen */
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err(EXIT_FAILURE, _("setsid failed"));
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if (ctty) {
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if (ioctl(STDIN_FILENO, TIOCSCTTY, 1))
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warn(_("failed to set the controlling terminal"));
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}
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execvp(argv[optind], argv + optind);
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err(EXIT_FAILURE, _("execvp failed"));
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}
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