1 /* vi: set sw=4 ts=4: */
3 * addgroup - add users to /etc/passwd and /etc/shadow
5 * Copyright (C) 1999 by Lineo, inc. and John Beppu
6 * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include <sys/param.h>
32 #include <sys/types.h>
38 #define GROUP_FILE "/etc/group"
39 #define SHADOW_FILE "/etc/gshadow"
42 /* structs __________________________ */
44 /* data _____________________________ */
46 /* defaults : should this be in an external file? */
47 static const char default_passwd[] = "x";
50 /* make sure gr_name isn't taken, make sure gid is kosher
51 * return 1 on failure */
52 static int group_study(const char *filename, struct group *g)
58 const int max = 65000;
60 etc_group = xfopen(filename, "r");
62 /* make sure gr_name isn't taken, make sure gid is kosher */
64 while ((grp = fgetgrent(etc_group))) {
65 if ((strcmp(grp->gr_name, g->gr_name)) == 0) {
66 error_msg_and_die("%s: group already in use\n", g->gr_name);
68 if ((desired) && grp->gr_gid == desired) {
69 error_msg_and_die("%d: gid has already been allocated\n",
72 if ((grp->gr_gid > g->gr_gid) && (grp->gr_gid < max)) {
73 g->gr_gid = grp->gr_gid;
88 /* append a new user to the passwd file */
89 static int addgroup(const char *filename, char *group, gid_t gid)
93 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
95 char *gshadow = SHADOW_FILE;
100 /* group:passwd:gid:userlist */
101 static const char entryfmt[] = "%s:%s:%d:%s\n";
103 /* make sure gid and group haven't already been allocated */
106 if (group_study(filename, &gr))
109 /* add entry to group */
110 etc_group = xfopen(filename, "a");
112 fprintf(etc_group, entryfmt, group, default_passwd, gr.gr_gid, "");
116 #ifdef CONFIG_FEATURE_SHADOWPASSWDS
117 /* add entry to gshadow if necessary */
118 if (access(gshadow, F_OK|W_OK) == 0) {
119 etc_gshadow = xfopen(gshadow, "a");
120 fprintf(etc_gshadow, "%s:!::\n", group);
130 * addgroup will take a login_name as its first parameter.
134 * can be customized via command-line parameters.
135 * ________________________________________________________________________ */
136 int addgroup_main(int argc, char **argv)
142 /* get remaining args */
143 while ((opt = getopt (argc, argv, "g:")) != -1)
146 gid = strtol(optarg, NULL, 10);
153 if (optind >= argc) {
156 group = argv[optind];
159 if (geteuid() != 0) {
161 ("Only root may add a group to the system.");
165 return addgroup(GROUP_FILE, group, gid);
168 /* $Id: addgroup.c,v 1.1 2002/06/04 20:45:05 sandman Exp $ */