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
28 static const char rcsid[] =
44 static struct passwd *lookup_pwent(const char *user);
45 static void delete_members(char ***members, int *grmembers, int *i,
46 struct carg *arg, struct group *grp);
47 static int print_group(struct group * grp, int pretty);
48 static gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args);
51 pw_group(struct userconf * cnf, int mode, struct cargs * args)
54 struct carg *a_name = getarg(args, 'n');
55 struct carg *a_gid = getarg(args, 'g');
57 struct group *grp = NULL;
59 char **members = NULL;
61 static struct group fakegroup =
69 if (mode == M_LOCK || mode == M_UNLOCK)
70 errx(EX_USAGE, "'lock' command is not available for groups");
73 * With M_NEXT, we only need to return the
77 gid_t next = gr_gidpolicy(cnf, args);
78 if (getarg(args, 'q'))
80 printf("%ld\n", (long)next);
84 if (mode == M_PRINT && getarg(args, 'a')) {
85 int pretty = getarg(args, 'P') != NULL;
88 while ((grp = GETGRENT()) != NULL)
89 print_group(grp, pretty);
95 errx(EX_DATAERR, "group name or id required");
97 if (mode != M_ADD && grp == NULL && isdigit((unsigned char)*a_name->val)) {
98 (a_gid = a_name)->ch = 'g';
102 grp = (a_name != NULL) ? GETGRNAM(a_name->val) : GETGRGID((gid_t) atoi(a_gid->val));
104 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
105 if (a_name == NULL && grp == NULL) /* Try harder */
106 grp = GETGRGID(atoi(a_gid->val));
109 if (mode == M_PRINT && getarg(args, 'F')) {
112 fakegroup.gr_name = a_name ? a_name->val : "nogroup";
113 fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1;
114 fakegroup.gr_mem = fmems;
115 return print_group(&fakegroup, getarg(args, 'P') != NULL);
117 errx(EX_DATAERR, "unknown group `%s'", a_name ? a_name->val : a_gid->val);
119 if (a_name == NULL) /* Needed later */
120 a_name = addarg(args, 'n', grp->gr_name);
123 * Handle deletions now
125 if (mode == M_DELETE) {
126 gid_t gid = grp->gr_gid;
130 err(EX_IOERR, "group '%s' not available (NIS?)", grp->gr_name);
132 warn("group update");
135 pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid);
137 } else if (mode == M_PRINT)
138 return print_group(grp, getarg(args, 'P') != NULL);
141 grp->gr_gid = (gid_t) atoi(a_gid->val);
143 if ((arg = getarg(args, 'l')) != NULL)
144 grp->gr_name = pw_checkname((u_char *)arg->val, 0);
146 if (a_name == NULL) /* Required */
147 errx(EX_DATAERR, "group name required");
148 else if (grp != NULL) /* Exists */
149 errx(EX_DATAERR, "group name `%s' already exists", a_name->val);
151 extendarray(&members, &grmembers, 200);
154 grp->gr_name = pw_checkname((u_char *)a_name->val, 0);
155 grp->gr_passwd = "*";
156 grp->gr_gid = gr_gidpolicy(cnf, args);
157 grp->gr_mem = members;
161 * This allows us to set a group password Group passwords is an
162 * antique idea, rarely used and insecure (no secure database) Should
163 * be discouraged, but it is apparently still supported by some
167 if ((arg = getarg(args, 'h')) != NULL ||
168 (arg = getarg(args, 'H')) != NULL) {
169 if (strcmp(arg->val, "-") == 0)
170 grp->gr_passwd = "*"; /* No access */
172 int fd = atoi(arg->val);
173 int precrypt = (arg->ch == 'H');
175 int istty = isatty(fd);
180 if (tcgetattr(fd, &t) == -1)
183 struct termios n = t;
186 n.c_lflag &= ~(ECHO);
187 tcsetattr(fd, TCSANOW, &n);
188 printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name);
192 b = read(fd, line, sizeof(line) - 1);
193 if (istty) { /* Restore state */
194 tcsetattr(fd, TCSANOW, &t);
199 warn("-h file descriptor");
203 if ((p = strpbrk(line, " \t\r\n")) != NULL)
206 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
208 if (strchr(line, ':') != NULL)
210 grp->gr_passwd = line;
212 grp->gr_passwd = pw_pwcrypt(line);
216 if (((arg = getarg(args, 'M')) != NULL ||
217 (arg = getarg(args, 'd')) != NULL ||
218 (arg = getarg(args, 'm')) != NULL) && arg->val) {
223 /* Make sure this is not stay NULL with -M "" */
224 extendarray(&members, &grmembers, 200);
226 delete_members(&members, &grmembers, &i, arg, grp);
227 else if (arg->ch == 'm') {
230 while (grp->gr_mem[k] != NULL) {
231 if (extendarray(&members, &grmembers, i + 2) != -1)
232 members[i++] = grp->gr_mem[k];
238 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
242 * Check for duplicates
244 pwd = lookup_pwent(p);
245 for (j = 0; j < i && strcmp(members[j], pwd->pw_name) != 0; j++)
247 if (j == i && extendarray(&members, &grmembers, i + 2) != -1)
248 members[i++] = newstr(pwd->pw_name);
250 while (i < grmembers)
252 grp->gr_mem = members;
255 if (getarg(args, 'N') != NULL)
256 return print_group(grp, getarg(args, 'P') != NULL);
258 if (mode == M_ADD && (rc = addgrent(grp)) != 0) {
260 warnx("group '%s' already exists", grp->gr_name);
262 warn("group update");
264 } else if (mode == M_UPDATE && (rc = chggrent(a_name->val, grp)) != 0) {
266 warnx("group '%s' not available (NIS?)", grp->gr_name);
268 warn("group update");
271 /* grp may have been invalidated */
272 if ((grp = GETGRNAM(a_name->val)) == NULL)
273 errx(EX_SOFTWARE, "group disappeared during update");
275 pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid);
285 * Lookup a passwd entry using a name or UID.
287 static struct passwd *
288 lookup_pwent(const char *user)
292 if ((pwd = GETPWNAM(user)) == NULL &&
293 (!isdigit((unsigned char)*user) ||
294 (pwd = getpwuid((uid_t) atoi(user))) == NULL))
295 errx(EX_NOUSER, "user `%s' does not exist", user);
302 * Delete requested members from a group.
305 delete_members(char ***members, int *grmembers, int *i, struct carg *arg,
316 while (grp->gr_mem[k] != NULL) {
318 if ((valueCopy = strdup(arg->val)) == NULL)
319 errx(EX_UNAVAILABLE, "out of memory");
320 valuePtr = valueCopy;
321 while ((user = strsep(&valuePtr, ", \t")) != NULL) {
322 pwd = lookup_pwent(user);
323 if (strcmp(grp->gr_mem[k], pwd->pw_name) == 0) {
331 extendarray(members, grmembers, *i + 2) != -1)
332 (*members)[(*i)++] = grp->gr_mem[k];
342 gr_gidpolicy(struct userconf * cnf, struct cargs * args)
345 gid_t gid = (gid_t) - 1;
346 struct carg *a_gid = getarg(args, 'g');
349 * Check the given gid, if any
352 gid = (gid_t) atol(a_gid->val);
354 if ((grp = GETGRGID(gid)) != NULL && getarg(args, 'o') == NULL)
355 errx(EX_DATAERR, "gid `%ld' has already been allocated", (long) grp->gr_gid);
360 * We need to allocate the next available gid under one of
361 * two policies a) Grab the first unused gid b) Grab the
362 * highest possible unused gid
364 if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
366 cnf->max_gid = 32000;
368 bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
371 * Now, let's fill the bitmap from the password file
374 while ((grp = GETGRENT()) != NULL)
375 if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
376 (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
377 bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
381 * Then apply the policy, with fallback to reuse if necessary
384 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
386 gid = (gid_t) (bm_lastset(&bm) + 1);
387 if (!bm_isset(&bm, gid))
390 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
394 * Another sanity check
396 if (gid < cnf->min_gid || gid > cnf->max_gid)
397 errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used");
405 print_group(struct group * grp, int pretty)
416 printf("Group Name: %-15s #%lu\n"
418 grp->gr_name, (long) grp->gr_gid);
419 for (i = 0; grp->gr_mem[i]; i++)
420 printf("%s%s", i ? "," : "", grp->gr_mem[i]);
421 fputs("\n\n", stdout);