mirror of
https://git.busybox.net/busybox.git
synced 2024-12-18 09:53:23 +08:00
94f5e0ba7c
* cp/mv now accepts (and ignores) the -f flag, since it always
does force anyway
* tail can now accept -<num> commands (e.g. -10) for better
compatibility with the standard tail command
* added a simple id implementation; doesn't support supp. groups yet
93 lines
2.2 KiB
C
93 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini id implementation for busybox
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*
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*
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* Copyright (C) 2000 by Randolph Chung <tausq@debian.org>
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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 GNU
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* General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <pwd.h>
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#include <grp.h>
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#include <sys/types.h>
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static const char id_usage[] =
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"id [OPTIONS]... [USERNAME]\n\n"
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"Print information for USERNAME or the current user\n\n"
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"\t-g\tprints only the group ID\n"
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"\t-u\tprints only the user ID\n"
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"\t-r\tprints the real user ID instead of the effective ID (with -ug)\n\n";
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extern int id_main(int argc, char **argv)
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{
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int no_user = 0, no_group = 0, print_real = 0;
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char *cp, *user, *group;
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gid_t gid;
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cp = user = group = NULL;
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argc--; argv++;
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while (argc > 0) {
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cp = *argv;
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if (*cp == '-') {
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switch (*++cp) {
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case 'u': no_group = 1; break;
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case 'g': no_user = 1; break;
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case 'r': print_real = 1; break;
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default: usage(id_usage);
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}
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} else {
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user = cp;
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}
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argc--; argv++;
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}
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if (no_user && no_group) usage(id_usage);
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if (user == NULL) {
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user = xmalloc(9);
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group = xmalloc(9);
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if (print_real) {
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my_getpwuid(user, getuid());
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my_getgrgid(group, getgid());
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} else {
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my_getpwuid(user, geteuid());
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my_getgrgid(group, getegid());
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}
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} else {
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group = xmalloc(9);
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gid = my_getpwnamegid(user);
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my_getgrgid(group, gid);
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}
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if (no_group) printf("%u\n", my_getpwnam(user));
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else if (no_user) printf("%u\n", my_getgrnam(group));
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else
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printf("uid=%u(%s) gid=%u(%s)\n",
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my_getpwnam(user), user, my_getgrnam(group), group);
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exit(0);
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}
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/* END CODE */
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