829bbd3b57
by Tito (farmatito AT tiscali.it) function old new delta update_passwd 743 1171 +428 bb_perror_nomsg - 9 +9 find_main 436 444 +8 passwd_main 1023 1027 +4 nameval 202 206 +4 chpasswd_main 315 319 +4 bb__parsespent 119 117 -2 adduser_main 654 650 -4 addgroup_main 345 341 -4 sv_main 1228 1222 -6 deluser_main 173 160 -13 bb_internal_putpwent 69 - -69 add_user_to_group 231 - -231 del_line_matching 460 31 -429 ------------------------------------------------------------------------------ (add/remove: 1/2 grow/shrink: 5/6 up/down: 457/-758) Total: -301 bytes
134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* addgroup - add groups to /etc/group and /etc/gshadow
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*
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* Copyright (C) 1999 by Lineo, inc. and John Beppu
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* Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
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* Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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*/
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#include "libbb.h"
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static void xgroup_study(struct group *g)
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{
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/* Make sure gr_name is unused */
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if (getgrnam(g->gr_name)) {
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goto error;
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}
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/* Check if the desired gid is free
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* or find the first free one */
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while (1) {
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if (!getgrgid(g->gr_gid)) {
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return; /* found free group: return */
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}
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if (option_mask32) {
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/* -g N, cannot pick gid other than N: error */
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g->gr_name = itoa(g->gr_gid);
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goto error;
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}
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g->gr_gid++;
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if (g->gr_gid <= 0) {
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/* overflowed: error */
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bb_error_msg_and_die("no gids left");
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}
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}
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error:
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/* exit */
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bb_error_msg_and_die("group %s already exists", g->gr_name);
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}
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/* append a new user to the passwd file */
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static void new_group(char *group, gid_t gid)
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{
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struct group gr;
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char *p;
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/* make sure gid and group haven't already been allocated */
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gr.gr_gid = gid;
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gr.gr_name = group;
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xgroup_study(&gr);
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/* add entry to group */
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p = xasprintf("x:%u:", gr.gr_gid);
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if (update_passwd(bb_path_group_file, group, p, NULL) < 0)
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exit(EXIT_FAILURE);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(p);
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#if ENABLE_FEATURE_SHADOWPASSWDS
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/* Ignore errors: if file is missing we suppose admin doesn't want it */
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update_passwd(bb_path_gshadow_file, group, "!::", NULL);
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#endif
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}
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/*
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* addgroup will take a login_name as its first parameter.
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*
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* gid can be customized via command-line parameters.
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* If called with two non-option arguments, addgroup
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* will add an existing user to an existing group.
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*/
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int addgroup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int addgroup_main(int argc UNUSED_PARAM, char **argv)
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{
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char *group;
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gid_t gid = 0;
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/* need to be root */
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if (geteuid()) {
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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}
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/* Syntax:
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* addgroup group
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* addgroup -g num group
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* addgroup user group
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* Check for min, max and missing args */
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opt_complementary = "-1:?2";
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if (getopt32(argv, "g:", &group)) {
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gid = xatoul_range(group, 0, ((unsigned long)(gid_t)ULONG_MAX) >> 1);
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}
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/* move past the commandline options */
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argv += optind;
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//argc -= optind;
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#if ENABLE_FEATURE_ADDUSER_TO_GROUP
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if (argv[1]) {
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struct group *gr;
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if (option_mask32) {
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/* -g was there, but "addgroup -g num user group"
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* is a no-no */
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bb_show_usage();
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}
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/* check if group and user exist */
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xuname2uid(argv[0]); /* unknown user: exit */
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gr = xgetgrnam(argv[1]); /* unknown group: exit */
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/* check if user is already in this group */
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for (; *(gr->gr_mem) != NULL; (gr->gr_mem)++) {
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if (!strcmp(argv[0], *(gr->gr_mem))) {
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/* user is already in group: do nothing */
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return EXIT_SUCCESS;
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}
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}
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if (update_passwd(bb_path_group_file, argv[1], NULL, argv[0]) < 0) {
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return EXIT_FAILURE;
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}
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# if ENABLE_FEATURE_SHADOWPASSWDS
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update_passwd(bb_path_gshadow_file, argv[1], NULL, argv[0]);
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# endif
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} else
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#endif /* ENABLE_FEATURE_ADDUSER_TO_GROUP */
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{
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die_if_bad_username(argv[0]);
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new_group(argv[0], gid);
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}
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/* Reached only on success */
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return EXIT_SUCCESS;
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}
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