178 lines
3.5 KiB
C
178 lines
3.5 KiB
C
/* Copyright (C) 1991, 1995, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <grp.h>
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#include <pwd.h>
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#include <limits.h>
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#include <libintl.h>
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#include <sys/types.h>
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static void
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print_grpname (id, parens)
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gid_t id;
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int parens;
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{
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const struct group *const g = getgrgid (id);
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if (g == NULL)
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{
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if (parens)
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return;
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else
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{
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fprintf (stderr, _("Couldn't find name for group %d\n"), id);
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exit (EXIT_FAILURE);
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}
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}
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if (parens)
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printf ("(%s)", g->gr_name);
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else
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puts (g->gr_name);
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}
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static void
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print_pwdname (id, parens)
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uid_t id;
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int parens;
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{
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const struct passwd *const p = getpwuid (id);
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if (p == NULL)
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{
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if (parens)
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return;
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else
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{
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fprintf (stderr, _("Couldn't find name for user %d\n"), (int) id);
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exit (EXIT_FAILURE);
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}
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}
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if (parens)
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printf ("(%s)", p->pw_name);
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else
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puts (p->pw_name);
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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int print_gid = 1, print_uid = 1;
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int real = 0, name = 0;
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int error = 0;
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int c;
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uid_t ruid = getuid (), euid = geteuid ();
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gid_t rgid = getgid (), egid = getegid ();
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while ((c = getopt (argc, argv, "gurn")) != -1)
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switch (c)
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{
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default:
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error = 1;
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break;
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case 'g':
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print_gid = 1;
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print_uid = 0;
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break;
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case 'u':
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print_uid = 1;
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print_gid = 0;
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break;
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case 'r':
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real = 1;
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break;
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case 'n':
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name = 1;
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break;
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}
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if (error || argc != optind)
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{
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fputs (_("Usage: id [-gurn]\n"), stderr);
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exit (EXIT_FAILURE);
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}
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if (print_uid && !print_gid)
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{
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const uid_t uid = real ? ruid : euid;
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if (name)
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print_pwdname (uid, 0);
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else
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printf ("%d\n", (int) uid);
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}
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else if (print_gid && !print_uid)
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{
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const gid_t gid = real ? rgid : egid;
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if (name)
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print_grpname (gid, 0);
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else
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printf ("%d\n", (int) gid);
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}
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else
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{
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#if NGROUPS_MAX > 0
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gid_t groups[NGROUPS_MAX];
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int ngroups;
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ngroups = getgroups (NGROUPS_MAX, groups);
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#endif
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printf ("uid=%d", (int) ruid);
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print_pwdname (ruid, 1);
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printf (" gid=%d", (int) rgid);
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print_grpname (rgid, 1);
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if (euid != ruid)
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{
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printf (" euid=%d", (int) euid);
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print_pwdname (euid, 1);
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}
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if (egid != rgid)
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{
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printf (" egid=%d", (int) egid);
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print_grpname (egid, 1);
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}
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#if NGROUPS > 0
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if (ngroups > 0)
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{
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size_t i;
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printf (" groups=%d", (int) groups[0]);
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print_grpname (groups[0], 1);
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for (i = 1; i < ngroups; ++i)
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{
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printf (", %d", (int) groups[i]);
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print_grpname (groups[i], 1);
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}
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}
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#endif
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putchar ('\n');
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}
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exit (EXIT_SUCCESS);
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}
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