projects / thirdparty / util-linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f092076f | 1 | /* |
| 9abd5e4b KZ |
2 | * No copyright is claimed. This code is in the public domain; do with |
| 3 | * it what you wish. | |
| 4 | * | |
| 5 | * Written by Daan De Meyer <daan.j.demeyer@gmail.com> | |
| f092076f | 6 | */ |
| f092076f DDM |
7 | #include <getopt.h> |
| 8 | #include <stdio.h> | |
| 9 | #include <stdlib.h> | |
| 10 | #include <unistd.h> | |
| 11 | #include <signal.h> | |
| 12 | ||
| 13 | #include "closestream.h" | |
| 14 | ||
| 15 | static void __attribute__((__noreturn__)) usage(void) | |
| 16 | { | |
| 17 | FILE *out = stdout; | |
| 18 | fputs(USAGE_HEADER, out); | |
| 19 | fprintf(out, _( | |
| 20 | " %s [options] <program> [arguments ...]\n"), | |
| 21 | program_invocation_short_name); | |
| 22 | ||
| 23 | fputs(USAGE_SEPARATOR, out); | |
| 24 | fputs(_("Run a program in a new process group.\n"), out); | |
| 25 | ||
| 26 | fputs(USAGE_OPTIONS, out); | |
| 27 | fputs(_(" -f, --foregound Make a foreground process group\n"), out); | |
| 28 | ||
| bad4c729 | 29 | fprintf(out, USAGE_HELP_OPTIONS(16)); |
| f092076f | 30 | |
| bad4c729 | 31 | fprintf(out, USAGE_MAN_TAIL("setpgid(1)")); |
| f092076f DDM |
32 | exit(EXIT_SUCCESS); |
| 33 | } | |
| 34 | ||
| 35 | int main(int argc, char **argv) | |
| 36 | { | |
| 37 | int ch, foreground = 0, fd; | |
| 38 | sigset_t s, old; | |
| 39 | ||
| 40 | static const struct option longopts[] = { | |
| 41 | {"foreground", no_argument, NULL, 'f'}, | |
| 42 | {"version", no_argument, NULL, 'V'}, | |
| 43 | {"help", no_argument, NULL, 'h'}, | |
| 44 | {NULL, 0, NULL, 0} | |
| 45 | }; | |
| 46 | ||
| 47 | setlocale(LC_ALL, ""); | |
| 48 | bindtextdomain(PACKAGE, LOCALEDIR); | |
| 49 | textdomain(PACKAGE); | |
| 50 | close_stdout_atexit(); | |
| 51 | ||
| 52 | while ((ch = getopt_long(argc, argv, "+Vh", longopts, NULL)) != -1) | |
| 53 | switch (ch) { | |
| 54 | case 'f': | |
| 55 | foreground = 1; | |
| 56 | break; | |
| 57 | case 'h': | |
| 58 | usage(); | |
| 59 | case 'V': | |
| 60 | print_version(EXIT_SUCCESS); | |
| 61 | default: | |
| 62 | errtryhelp(EXIT_FAILURE); | |
| 63 | } | |
| 64 | ||
| 65 | if (argc - optind < 1) { | |
| 66 | warnx(_("no command specified")); | |
| 67 | errtryhelp(EXIT_FAILURE); | |
| 68 | } | |
| 69 | ||
| 70 | if (setpgid(0, 0) < 0) | |
| 71 | err(EXIT_FAILURE, _("setpgid failed")); | |
| 72 | ||
| 73 | if (foreground) { | |
| 74 | fd = open("/dev/tty", O_RDONLY|O_CLOEXEC); | |
| 75 | if (fd >= 0) { | |
| 76 | if (sigemptyset(&s) < 0) | |
| 77 | err(EXIT_FAILURE, _("sigemptyset failed")); | |
| 78 | if (sigaddset(&s, SIGTTOU) < 0) | |
| 79 | err(EXIT_FAILURE, _("sigaddset failed")); | |
| 80 | if (sigprocmask(SIG_BLOCK, &s, &old) < 0) | |
| 81 | err(EXIT_FAILURE, _("sigprocmask failed")); | |
| 82 | if (tcsetpgrp(fd, getpgid(0)) < 0) | |
| 83 | err(EXIT_FAILURE, _("tcsetpgrp failed")); | |
| 84 | if (sigprocmask(SIG_SETMASK, &old, NULL) < 0) | |
| 85 | err(EXIT_FAILURE, _("sigprocmask failed")); | |
| 86 | } | |
| 87 | } | |
| 88 | ||
| 89 | execvp(argv[optind], argv + optind); | |
| 90 | errexec(argv[optind]); | |
| 91 | } |