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[] =
42 static struct passwd *lookup_pwent(const char *user);
43 static void delete_members(char ***members, int *grmembers, int *i,
44 struct carg *arg, struct group *grp);
45 static int print_group(struct group * grp, int pretty);
46 static gid_t gr_gidpolicy(struct userconf * cnf, struct cargs * args);
49 pw_group(struct userconf * cnf, int mode, struct cargs * args)
52 struct carg *a_name = getarg(args, 'n');
53 struct carg *a_gid = getarg(args, 'g');
55 struct group *grp = NULL;
57 char **members = NULL;
59 static struct group fakegroup =
67 if (mode == M_LOCK || mode == M_UNLOCK)
68 errx(EX_USAGE, "'lock' command is not available for groups");
71 * With M_NEXT, we only need to return the
75 gid_t next = gr_gidpolicy(cnf, args);
76 if (getarg(args, 'q'))
78 printf("%ld\n", (long)next);
82 if (mode == M_PRINT && getarg(args, 'a')) {
83 int pretty = getarg(args, 'P') != NULL;
86 while ((grp = GETGRENT()) != NULL)
87 print_group(grp, pretty);
93 errx(EX_DATAERR, "group name or id required");
95 if (mode != M_ADD && grp == NULL && isdigit((unsigned char)*a_name->val)) {
96 (a_gid = a_name)->ch = 'g';
100 grp = (a_name != NULL) ? GETGRNAM(a_name->val) : GETGRGID((gid_t) atoi(a_gid->val));
102 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
103 if (a_name == NULL && grp == NULL) /* Try harder */
104 grp = GETGRGID(atoi(a_gid->val));
107 if (mode == M_PRINT && getarg(args, 'F')) {
110 fakegroup.gr_name = a_name ? a_name->val : "nogroup";
111 fakegroup.gr_gid = a_gid ? (gid_t) atol(a_gid->val) : -1;
112 fakegroup.gr_mem = fmems;
113 return print_group(&fakegroup, getarg(args, 'P') != NULL);
115 errx(EX_DATAERR, "unknown group `%s'", a_name ? a_name->val : a_gid->val);
117 if (a_name == NULL) /* Needed later */
118 a_name = addarg(args, 'n', grp->gr_name);
121 * Handle deletions now
123 if (mode == M_DELETE) {
124 gid_t gid = grp->gr_gid;
128 err(EX_IOERR, "group '%s' not available (NIS?)", grp->gr_name);
130 warn("group update");
133 pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", a_name->val, (long) gid);
135 } else if (mode == M_PRINT)
136 return print_group(grp, getarg(args, 'P') != NULL);
139 grp->gr_gid = (gid_t) atoi(a_gid->val);
141 if ((arg = getarg(args, 'l')) != NULL)
142 grp->gr_name = pw_checkname((u_char *)arg->val, 0);
144 if (a_name == NULL) /* Required */
145 errx(EX_DATAERR, "group name required");
146 else if (grp != NULL) /* Exists */
147 errx(EX_DATAERR, "group name `%s' already exists", a_name->val);
149 extendarray(&members, &grmembers, 200);
152 grp->gr_name = pw_checkname((u_char *)a_name->val, 0);
153 grp->gr_passwd = "*";
154 grp->gr_gid = gr_gidpolicy(cnf, args);
155 grp->gr_mem = members;
159 * This allows us to set a group password Group passwords is an
160 * antique idea, rarely used and insecure (no secure database) Should
161 * be discouraged, but it is apparently still supported by some
165 if ((arg = getarg(args, 'h')) != NULL ||
166 (arg = getarg(args, 'H')) != NULL) {
167 if (strcmp(arg->val, "-") == 0)
168 grp->gr_passwd = "*"; /* No access */
170 int fd = atoi(arg->val);
171 int precrypt = (arg->ch == 'H');
173 int istty = isatty(fd);
178 if (tcgetattr(fd, &t) == -1)
181 struct termios n = t;
184 n.c_lflag &= ~(ECHO);
185 tcsetattr(fd, TCSANOW, &n);
186 printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name);
190 b = read(fd, line, sizeof(line) - 1);
191 if (istty) { /* Restore state */
192 tcsetattr(fd, TCSANOW, &t);
197 warn("-h file descriptor");
201 if ((p = strpbrk(line, " \t\r\n")) != NULL)
204 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
206 if (strchr(line, ':') != NULL)
208 grp->gr_passwd = line;
210 grp->gr_passwd = pw_pwcrypt(line);
214 if (((arg = getarg(args, 'M')) != NULL ||
215 (arg = getarg(args, 'd')) != NULL ||
216 (arg = getarg(args, 'm')) != NULL) && arg->val) {
221 /* Make sure this is not stay NULL with -M "" */
222 extendarray(&members, &grmembers, 200);
224 delete_members(&members, &grmembers, &i, arg, grp);
225 else if (arg->ch == 'm') {
228 while (grp->gr_mem[k] != NULL) {
229 if (extendarray(&members, &grmembers, i + 2) != -1)
230 members[i++] = grp->gr_mem[k];
236 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
240 * Check for duplicates
242 pwd = lookup_pwent(p);
243 for (j = 0; j < i && strcmp(members[j], pwd->pw_name) != 0; j++)
245 if (j == i && extendarray(&members, &grmembers, i + 2) != -1)
246 members[i++] = newstr(pwd->pw_name);
248 while (i < grmembers)
250 grp->gr_mem = members;
253 if (getarg(args, 'N') != NULL)
254 return print_group(grp, getarg(args, 'P') != NULL);
256 if (mode == M_ADD && (rc = addgrent(grp)) != 0) {
258 warnx("group '%s' already exists", grp->gr_name);
260 warn("group update");
262 } else if (mode == M_UPDATE && (rc = chggrent(a_name->val, grp)) != 0) {
264 warnx("group '%s' not available (NIS?)", grp->gr_name);
266 warn("group update");
269 /* grp may have been invalidated */
270 if ((grp = GETGRNAM(a_name->val)) == NULL)
271 errx(EX_SOFTWARE, "group disappeared during update");
273 pw_log(cnf, mode, W_GROUP, "%s(%ld)", grp->gr_name, (long) grp->gr_gid);
283 * Lookup a passwd entry using a name or UID.
285 static struct passwd *
286 lookup_pwent(const char *user)
290 if ((pwd = GETPWNAM(user)) == NULL &&
291 (!isdigit((unsigned char)*user) ||
292 (pwd = getpwuid((uid_t) atoi(user))) == NULL))
293 errx(EX_NOUSER, "user `%s' does not exist", user);
300 * Delete requested members from a group.
303 delete_members(char ***members, int *grmembers, int *i, struct carg *arg,
314 while (grp->gr_mem[k] != NULL) {
316 if ((valueCopy = strdup(arg->val)) == NULL)
317 errx(EX_UNAVAILABLE, "out of memory");
318 valuePtr = valueCopy;
319 while ((user = strsep(&valuePtr, ", \t")) != NULL) {
320 pwd = lookup_pwent(user);
321 if (strcmp(grp->gr_mem[k], pwd->pw_name) == 0) {
329 extendarray(members, grmembers, *i + 2) != -1)
330 (*members)[(*i)++] = grp->gr_mem[k];
340 gr_gidpolicy(struct userconf * cnf, struct cargs * args)
343 gid_t gid = (gid_t) - 1;
344 struct carg *a_gid = getarg(args, 'g');
347 * Check the given gid, if any
350 gid = (gid_t) atol(a_gid->val);
352 if ((grp = GETGRGID(gid)) != NULL && getarg(args, 'o') == NULL)
353 errx(EX_DATAERR, "gid `%ld' has already been allocated", (long) grp->gr_gid);
358 * We need to allocate the next available gid under one of
359 * two policies a) Grab the first unused gid b) Grab the
360 * highest possible unused gid
362 if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
364 cnf->max_gid = 32000;
366 bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
369 * Now, let's fill the bitmap from the password file
372 while ((grp = GETGRENT()) != NULL)
373 if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
374 (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
375 bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
379 * Then apply the policy, with fallback to reuse if necessary
382 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
384 gid = (gid_t) (bm_lastset(&bm) + 1);
385 if (!bm_isset(&bm, gid))
388 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
392 * Another sanity check
394 if (gid < cnf->min_gid || gid > cnf->max_gid)
395 errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used");
403 print_group(struct group * grp, int pretty)
409 fmtgrent(&buf, &buflen, grp);
415 printf("Group Name: %-15s #%lu\n"
417 grp->gr_name, (long) grp->gr_gid);
418 for (i = 0; grp->gr_mem[i]; i++)
419 printf("%s%s", i ? "," : "", grp->gr_mem[i]);
420 fputs("\n\n", stdout);