diff options
author | Erik Andersen <andersen@codepoet.org> | 2000-05-01 23:10:52 +0400 |
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committer | Erik Andersen <andersen@codepoet.org> | 2000-05-01 23:10:52 +0400 |
commit | 94f5e0ba7ca7af260f4bf2d8c77b8e6f6f528b18 (patch) | |
tree | 7f40ce6f49ca9ce727653928d1b9f655afb5cb66 /id.c | |
parent | 28c49b6c9c98dc592759063d10c49b209e849cae (diff) |
Some accrued fixes/updates.
* 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
Diffstat (limited to 'id.c')
-rw-r--r-- | id.c | 92 |
1 files changed, 92 insertions, 0 deletions
@@ -0,0 +1,92 @@ +/* vi: set sw=4 ts=4: */ +/* + * Mini id implementation for busybox + * + * + * Copyright (C) 2000 by Randolph Chung <tausq@debian.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include "internal.h" +#include <stdio.h> +#include <unistd.h> +#include <pwd.h> +#include <grp.h> +#include <sys/types.h> + +static const char id_usage[] = + "id [OPTIONS]... [USERNAME]\n\n" + "Print information for USERNAME or the current user\n\n" + "\t-g\tprints only the group ID\n" + "\t-u\tprints only the user ID\n" + "\t-r\tprints the real user ID instead of the effective ID (with -ug)\n\n"; + +extern int id_main(int argc, char **argv) +{ + int no_user = 0, no_group = 0, print_real = 0; + char *cp, *user, *group; + gid_t gid; + + cp = user = group = NULL; + + argc--; argv++; + + while (argc > 0) { + cp = *argv; + if (*cp == '-') { + switch (*++cp) { + case 'u': no_group = 1; break; + case 'g': no_user = 1; break; + case 'r': print_real = 1; break; + default: usage(id_usage); + } + } else { + user = cp; + } + argc--; argv++; + } + + if (no_user && no_group) usage(id_usage); + + if (user == NULL) { + user = xmalloc(9); + group = xmalloc(9); + if (print_real) { + my_getpwuid(user, getuid()); + my_getgrgid(group, getgid()); + } else { + my_getpwuid(user, geteuid()); + my_getgrgid(group, getegid()); + } + } else { + group = xmalloc(9); + gid = my_getpwnamegid(user); + my_getgrgid(group, gid); + } + + if (no_group) printf("%u\n", my_getpwnam(user)); + else if (no_user) printf("%u\n", my_getgrnam(group)); + else + printf("uid=%u(%s) gid=%u(%s)\n", + my_getpwnam(user), user, my_getgrnam(group), group); + + + exit(0); +} + + +/* END CODE */ |