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a966dcdb69
Update to latest gnulib with new copyright year. Run "make update-copyright" and then... * gnulib: Update included in this commit as copyright years are the only change from the previous gnulib commit. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Manually update copyright year, until we fully sync with gnulib at a later stage. * tests/sample-test: Adjust to use the single most recent year.
145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* groups -- print the groups a user is in
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Copyright (C) 1989-2024 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by James Youngman based on id.c and groups.sh,
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which were written by Arnold Robbins and David MacKenzie. */
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#include <config.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <grp.h>
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#include <getopt.h>
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#include "system.h"
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#include "group-list.h"
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#include "quote.h"
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/* The official name of this program (e.g., no 'g' prefix). */
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#define PROGRAM_NAME "groups"
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#define AUTHORS \
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proper_name ("David MacKenzie"), \
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proper_name ("James Youngman")
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static struct option const longopts[] =
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{
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{GETOPT_HELP_OPTION_DECL},
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{GETOPT_VERSION_OPTION_DECL},
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{nullptr, 0, nullptr, 0}
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};
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void
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usage (int status)
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{
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if (status != EXIT_SUCCESS)
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emit_try_help ();
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else
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{
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printf (_("Usage: %s [OPTION]... [USERNAME]...\n"), program_name);
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fputs (_("\
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Print group memberships for each USERNAME or, if no USERNAME is specified, for\
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\n\
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the current process (which may differ if the groups database has changed).\n"),
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stdout);
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fputs (HELP_OPTION_DESCRIPTION, stdout);
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fputs (VERSION_OPTION_DESCRIPTION, stdout);
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emit_ancillary_info (PROGRAM_NAME);
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}
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exit (status);
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}
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int
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main (int argc, char **argv)
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{
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int optc;
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bool ok = true;
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gid_t rgid, egid;
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uid_t ruid;
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initialize_main (&argc, &argv);
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set_program_name (argv[0]);
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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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/* Processing the arguments this way makes groups.c behave differently to
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* groups.sh if one of the arguments is "--".
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*/
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while ((optc = getopt_long (argc, argv, "", longopts, nullptr)) != -1)
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{
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switch (optc)
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{
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case_GETOPT_HELP_CHAR;
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case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
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default:
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usage (EXIT_FAILURE);
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}
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}
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if (optind == argc)
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{
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/* No arguments. Divulge the details of the current process. */
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uid_t NO_UID = -1;
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gid_t NO_GID = -1;
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errno = 0;
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ruid = getuid ();
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if (ruid == NO_UID && errno)
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error (EXIT_FAILURE, errno, _("cannot get real UID"));
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errno = 0;
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egid = getegid ();
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if (egid == NO_GID && errno)
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error (EXIT_FAILURE, errno, _("cannot get effective GID"));
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errno = 0;
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rgid = getgid ();
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if (rgid == NO_GID && errno)
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error (EXIT_FAILURE, errno, _("cannot get real GID"));
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if (!print_group_list (nullptr, ruid, rgid, egid, true, ' '))
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ok = false;
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putchar ('\n');
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}
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else
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{
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/* At least one argument. Divulge the details of the specified users. */
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for ( ; optind < argc; optind++)
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{
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struct passwd *pwd = getpwnam (argv[optind]);
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if (pwd == nullptr)
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{
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error (0, 0, _("%s: no such user"), quote (argv[optind]));
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ok = false;
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continue;
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}
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ruid = pwd->pw_uid;
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rgid = egid = pwd->pw_gid;
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printf ("%s : ", argv[optind]);
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if (!print_group_list (argv[optind], ruid, rgid, egid, true, ' '))
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ok = false;
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putchar ('\n');
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}
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}
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return ok ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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