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);
48 static gid_t gr_gidpolicy(struct userconf * cnf, long id);
51 pw_group(int mode, char *name, long id, struct cargs * args)
55 struct group *grp = NULL;
57 char **members = NULL;
58 struct userconf *cnf = conf.userconf;
60 static struct group fakegroup =
68 if (mode == M_LOCK || mode == M_UNLOCK)
69 errx(EX_USAGE, "'lock' command is not available for groups");
72 * With M_NEXT, we only need to return the
76 gid_t next = gr_gidpolicy(cnf, id);
77 if (getarg(args, 'q'))
83 if (mode == M_PRINT && getarg(args, 'a')) {
85 while ((grp = GETGRENT()) != NULL)
90 if (id < 0 && name == NULL)
91 errx(EX_DATAERR, "group name or id required");
93 grp = (name != NULL) ? GETGRNAM(name) : GETGRGID(id);
95 if (mode == M_UPDATE || mode == M_DELETE || mode == M_PRINT) {
96 if (name == NULL && grp == NULL) /* Try harder */
100 if (mode == M_PRINT && getarg(args, 'F')) {
103 fakegroup.gr_name = name ? name : "nogroup";
104 fakegroup.gr_gid = (gid_t) id;
105 fakegroup.gr_mem = fmems;
106 return print_group(&fakegroup);
109 errx(EX_DATAERR, "unknown group `%s'", name);
111 errx(EX_DATAERR, "unknown group `%ld'", id);
113 if (name == NULL) /* Needed later */
117 * Handle deletions now
119 if (mode == M_DELETE) {
122 err(EX_IOERR, "group '%s' not available (NIS?)",
125 err(EX_IOERR, "group update");
127 pw_log(cnf, mode, W_GROUP, "%s(%ld) removed", name, id);
129 } else if (mode == M_PRINT)
130 return print_group(grp);
133 grp->gr_gid = (gid_t) id;
135 if (conf.newname != NULL)
136 grp->gr_name = pw_checkname(conf.newname, 0);
138 if (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", name);
143 extendarray(&members, &grmembers, 200);
146 grp->gr_name = pw_checkname(name, 0);
147 grp->gr_passwd = "*";
148 grp->gr_gid = gr_gidpolicy(cnf, id);
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 (arg = getarg(args, 'H')) != NULL) {
161 if (strcmp(arg->val, "-") == 0)
162 grp->gr_passwd = "*"; /* No access */
164 int fd = atoi(arg->val);
165 int precrypt = (arg->ch == 'H');
167 int istty = isatty(fd);
172 if (tcgetattr(fd, &t) == -1)
175 struct termios n = t;
178 n.c_lflag &= ~(ECHO);
179 tcsetattr(fd, TCSANOW, &n);
180 printf("%sassword for group %s:", (mode == M_UPDATE) ? "New p" : "P", grp->gr_name);
184 b = read(fd, line, sizeof(line) - 1);
185 if (istty) { /* Restore state */
186 tcsetattr(fd, TCSANOW, &t);
191 err(EX_OSERR, "-h file descriptor");
193 if ((p = strpbrk(line, " \t\r\n")) != NULL)
196 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
198 if (strchr(line, ':') != NULL)
200 grp->gr_passwd = line;
202 grp->gr_passwd = pw_pwcrypt(line);
206 if (((arg = getarg(args, 'M')) != NULL ||
207 (arg = getarg(args, 'd')) != NULL ||
208 (arg = getarg(args, 'm')) != NULL) && arg->val) {
213 /* Make sure this is not stay NULL with -M "" */
214 extendarray(&members, &grmembers, 200);
216 delete_members(&members, &grmembers, &i, arg, grp);
217 else if (arg->ch == 'm') {
220 if (grp->gr_mem != NULL) {
221 while (grp->gr_mem[k] != NULL) {
222 if (extendarray(&members, &grmembers, i + 2) != -1)
223 members[i++] = grp->gr_mem[k];
230 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
234 * Check for duplicates
236 pwd = lookup_pwent(p);
237 for (j = 0; j < i && strcmp(members[j], pwd->pw_name) != 0; j++)
239 if (j == i && extendarray(&members, &grmembers, i + 2) != -1)
240 members[i++] = newstr(pwd->pw_name);
242 while (i < grmembers)
244 grp->gr_mem = members;
248 return print_group(grp);
250 if (mode == M_ADD && (rc = addgrent(grp)) != 0) {
252 errx(EX_IOERR, "group '%s' already exists",
255 err(EX_IOERR, "group update");
256 } else if (mode == M_UPDATE && (rc = chggrent(name, grp)) != 0) {
258 errx(EX_IOERR, "group '%s' not available (NIS?)",
261 err(EX_IOERR, "group update");
264 if (conf.newname != NULL)
266 /* grp may have been invalidated */
267 if ((grp = GETGRNAM(name)) == NULL)
268 errx(EX_SOFTWARE, "group disappeared during update");
270 pw_log(cnf, mode, W_GROUP, "%s(%u)", grp->gr_name, grp->gr_gid);
279 * Lookup a passwd entry using a name or UID.
281 static struct passwd *
282 lookup_pwent(const char *user)
286 if ((pwd = GETPWNAM(user)) == NULL &&
287 (!isdigit((unsigned char)*user) ||
288 (pwd = getpwuid((uid_t) atoi(user))) == NULL))
289 errx(EX_NOUSER, "user `%s' does not exist", user);
296 * Delete requested members from a group.
299 delete_members(char ***members, int *grmembers, int *i, struct carg *arg,
309 if (grp->gr_mem == NULL)
313 while (grp->gr_mem[k] != NULL) {
315 if ((valueCopy = strdup(arg->val)) == NULL)
316 errx(EX_UNAVAILABLE, "out of memory");
317 valuePtr = valueCopy;
318 while ((user = strsep(&valuePtr, ", \t")) != NULL) {
319 pwd = lookup_pwent(user);
320 if (strcmp(grp->gr_mem[k], pwd->pw_name) == 0) {
328 extendarray(members, grmembers, *i + 2) != -1)
329 (*members)[(*i)++] = grp->gr_mem[k];
339 gr_gidpolicy(struct userconf * cnf, long id)
342 gid_t gid = (gid_t) - 1;
345 * Check the given gid, if any
350 if ((grp = GETGRGID(gid)) != NULL && conf.checkduplicate)
351 errx(EX_DATAERR, "gid `%u' has already been allocated", grp->gr_gid);
356 * We need to allocate the next available gid under one of
357 * two policies a) Grab the first unused gid b) Grab the
358 * highest possible unused gid
360 if (cnf->min_gid >= cnf->max_gid) { /* Sanity claus^H^H^H^Hheck */
362 cnf->max_gid = 32000;
364 bm = bm_alloc(cnf->max_gid - cnf->min_gid + 1);
367 * Now, let's fill the bitmap from the password file
370 while ((grp = GETGRENT()) != NULL)
371 if ((gid_t)grp->gr_gid >= (gid_t)cnf->min_gid &&
372 (gid_t)grp->gr_gid <= (gid_t)cnf->max_gid)
373 bm_setbit(&bm, grp->gr_gid - cnf->min_gid);
377 * Then apply the policy, with fallback to reuse if necessary
380 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
382 gid = (gid_t) (bm_lastset(&bm) + 1);
383 if (!bm_isset(&bm, gid))
386 gid = (gid_t) (bm_firstunset(&bm) + cnf->min_gid);
390 * Another sanity check
392 if (gid < cnf->min_gid || gid > cnf->max_gid)
393 errx(EX_SOFTWARE, "unable to allocate a new gid - range fully used");
401 print_group(struct group * grp)
412 printf("Group Name: %-15s #%lu\n"
414 grp->gr_name, (long) grp->gr_gid);
415 if (grp->gr_mem != NULL) {
416 for (i = 0; grp->gr_mem[i]; i++)
417 printf("%s%s", i ? "," : "", grp->gr_mem[i]);
419 fputs("\n\n", stdout);