3 * David L. Nugent. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.sbin/pw/pw_group.c,v 1.12.2.1 2000/06/28 19:19:04 ache Exp $
27 * $DragonFly: src/usr.sbin/pw/pw_group.c,v 1.2 2003/06/17 04:30:02 dillon Exp $
39 static int print_group(struct group * grp, int pretty);
40 static gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args);
43 pw_group(struct userconf * cnf, int mode, struct cargs * args)
46 struct carg *a_name = getarg(args, 'n');
47 struct carg *a_gid = getarg(args, 'g');
49 struct group *grp = NULL;
51 char **members = NULL;
53 static struct group fakegroup =
61 if (mode == M_LOCK || mode == M_UNLOCK)
62 errx(EX_USAGE, "'lock' command is not available for groups");
65 * With M_NEXT, we only need to return the
69 gid_t next = gr_gidpolicy(cnf, args);
70 if (getarg(args, 'q'))
72 printf("%ld\n", (long)next);
76 if (mode == M_PRINT && getarg(args, 'a')) {
77 int pretty = getarg(args, 'P') != NULL;
80 while ((grp = GETGRENT()) != NULL)
81 print_group(grp, pretty);
87 errx(EX_DATAERR, "group name or id required");
89 if (mode != M_ADD && grp == NULL && isdigit((unsigned char)*a_name->val)) {
90 (a_gid = a_name)->ch = 'g';
94 grp = (a_name != NULL) ? GETGRNAM(a_name->val) : GETGRGID((gid_t) atoi(a_gid->val));
96 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
97 if (a_name == NULL && grp == NULL) /* Try harder */
98 grp = GETGRGID(atoi(a_gid->val));
101 if (mode == M_PRINT && getarg(args, 'F')) {
104 fakegroup.gr_name = a_name ? a_name->val : "nogroup";
105 fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1;
106 fakegroup.gr_mem = fmems;
107 return print_group(&fakegroup, getarg(args, 'P') != NULL);
109 errx(EX_DATAERR, "unknown group `%s'", a_name ? a_name->val : a_gid->val);
111 if (a_name == NULL) /* Needed later */
112 a_name = addarg(args, 'n', grp->gr_name);
115 * Handle deletions now
117 if (mode == M_DELETE) {
118 gid_t gid = grp->gr_gid;
122 err(EX_IOERR, "group '%s' not available (NIS?)", grp->gr_name);
124 warn("group update");
127 pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid);
129 } else if (mode == M_PRINT)
130 return print_group(grp, getarg(args, 'P') != NULL);
133 grp->gr_gid = (gid_t) atoi(a_gid->val);
135 if ((arg = getarg(args, 'l')) != NULL)
136 grp->gr_name = pw_checkname((u_char *)arg->val, 0);
138 if (a_name == NULL) /* Required */
139 errx(EX_DATAERR, "group name required");
140 else if (grp != NULL) /* Exists */
141 errx(EX_DATAERR, "group name `%s' already exists", a_name->val);
143 extendarray(&members, &grmembers, 200);
146 grp->gr_name = pw_checkname((u_char *)a_name->val, 0);
147 grp->gr_passwd = "*";
148 grp->gr_gid = gr_gidpolicy(cnf, args);
149 grp->gr_mem = members;
153 * This allows us to set a group password Group passwords is an
154 * antique idea, rarely used and insecure (no secure database) Should
155 * be discouraged, but it is apparently still supported by some
159 if ((arg = getarg(args, 'h')) != NULL) {
160 if (strcmp(arg->val, "-") == 0)
161 grp->gr_passwd = "*"; /* No access */
163 int fd = atoi(arg->val);
165 int istty = isatty(fd);
170 if (tcgetattr(fd, &t) == -1)
173 struct termios n = t;
176 n.c_lflag &= ~(ECHO);
177 tcsetattr(fd, TCSANOW, &n);
178 printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name);
182 b = read(fd, line, sizeof(line) - 1);
183 if (istty) { /* Restore state */
184 tcsetattr(fd, TCSANOW, &t);
189 warn("-h file descriptor");
193 if ((p = strpbrk(line, " \t\r\n")) != NULL)
196 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
197 grp->gr_passwd = pw_pwcrypt(line);
201 if (((arg = getarg(args, 'M')) != NULL || (arg = getarg(args, 'm')) != NULL) && arg->val) {
206 /* Make sure this is not stay NULL with -M "" */
207 extendarray(&members, &grmembers, 200);
208 if (arg->ch == 'm') {
211 while (grp->gr_mem[k] != NULL) {
212 if (extendarray(&members, &grmembers, i + 2) != -1) {
213 members[i++] = grp->gr_mem[k];
218 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
220 if ((pwd = GETPWNAM(p)) == NULL) {
221 if (!isdigit((unsigned char)*p) || (pwd = getpwuid((uid_t) atoi(p))) == NULL)
222 errx(EX_NOUSER, "user `%s' does not exist", p);
225 * Check for duplicates
227 for (j = 0; j < i && strcmp(members[j], pwd->pw_name)!=0; j++)
229 if (j == i && extendarray(&members, &grmembers, i + 2) != -1)
230 members[i++] = newstr(pwd->pw_name);
232 while (i < grmembers)
234 grp->gr_mem = members;
237 if (getarg(args, 'N') != NULL)
238 return print_group(grp, getarg(args, 'P') != NULL);
240 if (mode == M_ADD && (rc = addgrent(grp)) != 0) {
242 warnx("group '%s' already exists", grp->gr_name);
244 warn("group update");
246 } else if (mode == M_UPDATE && (rc = chggrent(a_name->val, grp)) != 0) {
248 warnx("group '%s' not available (NIS?)", grp->gr_name);
250 warn("group update");
253 /* grp may have been invalidated */
254 if ((grp = GETGRNAM(a_name->val)) == NULL)
255 errx(EX_SOFTWARE, "group disappeared during update");
257 pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid);
267 gr_gidpolicy(struct userconf * cnf, struct cargs * args)
270 gid_t gid = (gid_t) - 1;
271 struct carg *a_gid = getarg(args, 'g');
274 * Check the given gid, if any
277 gid = (gid_t) atol(a_gid->val);
279 if ((grp = GETGRGID(gid)) != NULL && getarg(args, 'o') == NULL)
280 errx(EX_DATAERR, "gid `%ld' has already been allocated", (long) grp->gr_gid);
285 * We need to allocate the next available gid under one of
286 * two policies a) Grab the first unused gid b) Grab the
287 * highest possible unused gid
289 if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
291 cnf->max_gid = 32000;
293 bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
296 * Now, let's fill the bitmap from the password file
299 while ((grp = GETGRENT()) != NULL)
300 if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
301 (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
302 bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
306 * Then apply the policy, with fallback to reuse if necessary
309 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
311 gid = (gid_t) (bm_lastset(&bm) + 1);
312 if (!bm_isset(&bm, gid))
315 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
319 * Another sanity check
321 if (gid < cnf->min_gid || gid > cnf->max_gid)
322 errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used");
330 print_group(struct group * grp, int pretty)
336 fmtgrent(&buf, &buflen, grp);
342 printf("Group Name: %-15s #%lu\n"
344 grp->gr_name, (long) grp->gr_gid);
345 for (i = 0; grp->gr_mem[i]; i++)
346 printf("%s%s", i ? "," : "", grp->gr_mem[i]);
347 fputs("\n\n", stdout);