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 1.3 2004/09/25 20:38:21 dillon Exp $
39 static int print_group(struct group * grp, int pretty);
40 static gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args);
44 alldigits(const char *str)
47 if (*str < '0' || *str > '9')
55 pw_group(struct userconf * cnf, int mode, struct cargs * args)
58 struct carg *a_name = getarg(args, 'n');
59 struct carg *a_gid = getarg(args, 'g');
61 struct group *grp = NULL;
63 char **members = NULL;
65 static struct group fakegroup =
73 if (mode == M_LOCK || mode == M_UNLOCK)
74 errx(EX_USAGE, "'lock' command is not available for groups");
77 * With M_NEXT, we only need to return the
81 gid_t next = gr_gidpolicy(cnf, args);
82 if (getarg(args, 'q'))
84 printf("%ld\n", (long)next);
88 if (mode == M_PRINT && getarg(args, 'a')) {
89 int pretty = getarg(args, 'P') != NULL;
92 while ((grp = GETGRENT()) != NULL)
93 print_group(grp, pretty);
99 errx(EX_DATAERR, "group name or id required");
101 if (mode != M_ADD && grp == NULL && alldigits(a_name->val)) {
102 (a_gid = a_name)->ch = 'g';
106 grp = (a_name != NULL) ? GETGRNAM(a_name->val) : GETGRGID((gid_t) atoi(a_gid->val));
108 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
109 if (a_name == NULL && grp == NULL) /* Try harder */
110 grp = GETGRGID(atoi(a_gid->val));
113 if (mode == M_PRINT && getarg(args, 'F')) {
116 fakegroup.gr_name = a_name ? a_name->val : "nogroup";
117 fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1;
118 fakegroup.gr_mem = fmems;
119 return print_group(&fakegroup, getarg(args, 'P') != NULL);
121 errx(EX_DATAERR, "unknown group `%s'", a_name ? a_name->val : a_gid->val);
123 if (a_name == NULL) /* Needed later */
124 a_name = addarg(args, 'n', grp->gr_name);
127 * Handle deletions now
129 if (mode == M_DELETE) {
130 gid_t gid = grp->gr_gid;
134 err(EX_IOERR, "group '%s' not available (NIS?)", grp->gr_name);
136 warn("group update");
139 pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid);
141 } else if (mode == M_PRINT)
142 return print_group(grp, getarg(args, 'P') != NULL);
145 grp->gr_gid = (gid_t) atoi(a_gid->val);
147 if ((arg = getarg(args, 'l')) != NULL)
148 grp->gr_name = pw_checkname((u_char *)arg->val, 0);
150 if (a_name == NULL) /* Required */
151 errx(EX_DATAERR, "group name required");
152 else if (grp != NULL) /* Exists */
153 errx(EX_DATAERR, "group name `%s' already exists", a_name->val);
155 extendarray(&members, &grmembers, 200);
158 grp->gr_name = pw_checkname((u_char *)a_name->val, 0);
159 grp->gr_passwd = "*";
160 grp->gr_gid = gr_gidpolicy(cnf, args);
161 grp->gr_mem = members;
165 * This allows us to set a group password Group passwords is an
166 * antique idea, rarely used and insecure (no secure database) Should
167 * be discouraged, but it is apparently still supported by some
171 if ((arg = getarg(args, 'h')) != NULL) {
172 if (strcmp(arg->val, "-") == 0)
173 grp->gr_passwd = "*"; /* No access */
175 int fd = atoi(arg->val);
177 int istty = isatty(fd);
182 if (tcgetattr(fd, &t) == -1)
185 struct termios n = t;
188 n.c_lflag &= ~(ECHO);
189 tcsetattr(fd, TCSANOW, &n);
190 printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name);
194 b = read(fd, line, sizeof(line) - 1);
195 if (istty) { /* Restore state */
196 tcsetattr(fd, TCSANOW, &t);
201 warn("-h file descriptor");
205 if ((p = strpbrk(line, " \t\r\n")) != NULL)
208 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
209 grp->gr_passwd = pw_pwcrypt(line);
213 if (((arg = getarg(args, 'M')) != NULL || (arg = getarg(args, 'm')) != NULL) && arg->val) {
218 /* Make sure this is not stay NULL with -M "" */
219 extendarray(&members, &grmembers, 200);
220 if (arg->ch == 'm') {
223 while (grp->gr_mem[k] != NULL) {
224 if (extendarray(&members, &grmembers, i + 2) != -1) {
225 members[i++] = grp->gr_mem[k];
230 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
232 if ((pwd = GETPWNAM(p)) == NULL) {
233 if (!isdigit((unsigned char)*p) || (pwd = getpwuid((uid_t) atoi(p))) == NULL)
234 errx(EX_NOUSER, "user `%s' does not exist", p);
237 * Check for duplicates
239 for (j = 0; j < i && strcmp(members[j], pwd->pw_name)!=0; j++)
241 if (j == i && extendarray(&members, &grmembers, i + 2) != -1)
242 members[i++] = newstr(pwd->pw_name);
244 while (i < grmembers)
246 grp->gr_mem = members;
249 if (getarg(args, 'N') != NULL)
250 return print_group(grp, getarg(args, 'P') != NULL);
252 if (mode == M_ADD && (rc = addgrent(grp)) != 0) {
254 warnx("group '%s' already exists", grp->gr_name);
256 warn("group update");
258 } else if (mode == M_UPDATE && (rc = chggrent(a_name->val, grp)) != 0) {
260 warnx("group '%s' not available (NIS?)", grp->gr_name);
262 warn("group update");
265 /* grp may have been invalidated */
266 if ((grp = GETGRNAM(a_name->val)) == NULL)
267 errx(EX_SOFTWARE, "group disappeared during update");
269 pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid);
279 gr_gidpolicy(struct userconf * cnf, struct cargs * args)
282 gid_t gid = (gid_t) - 1;
283 struct carg *a_gid = getarg(args, 'g');
286 * Check the given gid, if any
289 gid = (gid_t) atol(a_gid->val);
291 if ((grp = GETGRGID(gid)) != NULL && getarg(args, 'o') == NULL)
292 errx(EX_DATAERR, "gid `%ld' has already been allocated", (long) grp->gr_gid);
297 * We need to allocate the next available gid under one of
298 * two policies a) Grab the first unused gid b) Grab the
299 * highest possible unused gid
301 if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
303 cnf->max_gid = 32000;
305 bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
308 * Now, let's fill the bitmap from the password file
311 while ((grp = GETGRENT()) != NULL)
312 if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
313 (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
314 bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
318 * Then apply the policy, with fallback to reuse if necessary
321 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
323 gid = (gid_t) (bm_lastset(&bm) + 1);
324 if (!bm_isset(&bm, gid))
327 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
331 * Another sanity check
333 if (gid < cnf->min_gid || gid > cnf->max_gid)
334 errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used");
342 print_group(struct group * grp, int pretty)
348 fmtgrent(&buf, &buflen, grp);
354 printf("Group Name: %-15s #%lu\n"
356 grp->gr_name, (long) grp->gr_gid);
357 for (i = 0; grp->gr_mem[i]; i++)
358 printf("%s%s", i ? "," : "", grp->gr_mem[i]);
359 fputs("\n\n", stdout);