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[] =
66 static char bourne_shell[] = "sh";
68 static char *system_shells[_UC_MAXSHELLS] =
75 static char const *booltrue[] =
77 "yes", "true", "1", "on", NULL
79 static char const *boolfalse[] =
81 "no", "false", "0", "off", NULL
84 static struct userconf config =
86 0, /* Default password for new users? (nologin) */
89 NULL, /* NIS version of the passwd file */
90 "/usr/share/skel", /* Where to obtain skeleton files */
91 NULL, /* Mail to send to new accounts */
92 "/var/log/userlog", /* Where to log changes */
93 "/home", /* Where to create home directory */
94 _DEF_DIRMODE, /* Home directory perms, modified by umask */
95 "/bin", /* Where shells are located */
96 system_shells, /* List of shells (first is default) */
97 bourne_shell, /* Default shell */
98 NULL, /* Default group name */
99 NULL, /* Default (additional) groups */
100 NULL, /* Default login class */
101 1000, 32000, /* Allowed range of uids */
102 1000, 32000, /* Allowed range of gids */
103 0, /* Days until account expires */
104 0, /* Days until password expires */
105 0 /* size of default_group array */
108 static char const *comments[_UC_FIELDS] =
110 "#\n# pw.conf - user/group configuration defaults\n#\n",
111 "\n# Password for new users? no=nologin yes=loginid none=blank random=random\n",
112 "\n# Reuse gaps in uid sequence? (yes or no)\n",
113 "\n# Reuse gaps in gid sequence? (yes or no)\n",
114 "\n# Path to the NIS passwd file (blank or 'no' for none)\n",
115 "\n# Obtain default dotfiles from this directory\n",
116 "\n# Mail this file to new user (/etc/newuser.msg or no)\n",
117 "\n# Log add/change/remove information in this file\n",
118 "\n# Root directory in which $HOME directory is created\n",
119 "\n# Mode for the new $HOME directory, will be modified by umask\n",
120 "\n# Colon separated list of directories containing valid shells\n",
121 "\n# Comma separated list of available shells (without paths)\n",
122 "\n# Default shell (without path)\n",
123 "\n# Default group (leave blank for new group per user)\n",
124 "\n# Extra groups for new users\n",
125 "\n# Default login class for new users\n",
126 "\n# Range of valid default user ids\n",
128 "\n# Range of valid default group ids\n",
130 "\n# Days after which account expires (0=disabled)\n",
131 "\n# Days after which password expires (0=disabled)\n"
134 static char const *kwds[] =
162 unquote(char const * str)
164 if (str && (*str == '"' || *str == '\'')) {
165 char *p = strchr(str + 1, *str);
169 return (char *) (*++str ? str : NULL);
175 boolean_val(char const * str, int dflt)
177 if ((str = unquote(str)) != NULL) {
180 for (i = 0; booltrue[i]; i++)
181 if (strcmp(str, booltrue[i]) == 0)
183 for (i = 0; boolfalse[i]; i++)
184 if (strcmp(str, boolfalse[i]) == 0)
188 * Special cases for defaultpassword
190 if (strcmp(str, "random") == 0)
192 if (strcmp(str, "none") == 0)
206 return val ? booltrue[0] : boolfalse[0];
210 newstr(char const * p)
214 if ((p = unquote(p)) != NULL) {
215 int l = strlen(p) + 1;
217 if ((q = malloc(l)) != NULL)
227 read_userconfig(char const * file)
231 extendarray(&config.groups, &config.numgroups, 200);
232 memset(config.groups, 0, config.numgroups * sizeof(char *));
234 file = _PATH_PW_CONF;
235 if ((fp = fopen(file, "r")) != NULL) {
236 int buflen = LNBUFSZ;
237 char *buf = malloc(buflen);
240 while (fgets(buf, buflen, fp) != NULL) {
243 while ((p = strchr(buf, '\n')) == NULL) {
245 if (extendline(&buf, &buflen, buflen + LNBUFSZ) == -1) {
247 while ((ch = fgetc(fp)) != '\n' && ch != EOF);
248 goto nextline; /* Ignore it */
251 if (fgets(buf + l, buflen - l, fp) == NULL)
252 break; /* Unterminated last line */
258 if (*buf && (p = strtok(buf, " \t\r\n=")) != NULL && *p != '#') {
259 static char const toks[] = " \t\r\n,=";
260 char *q = strtok(NULL, toks);
264 while (i < _UC_FIELDS && strcmp(p, kwds[i]) != 0)
268 printf("Got unknown kwd `%s' val=`%s'\n", p, q ? q : "");
270 printf("Got kwd[%s]=%s\n", p, q);
274 config.default_password = boolean_val(q, 1);
277 config.reuse_uids = boolean_val(q, 0);
280 config.reuse_gids = boolean_val(q, 0);
283 config.nispasswd = (q == NULL || !boolean_val(q, 1))
287 config.dotdir = (q == NULL || !boolean_val(q, 1))
291 config.newmail = (q == NULL || !boolean_val(q, 1))
295 config.logfile = (q == NULL || !boolean_val(q, 1))
299 config.home = (q == NULL || !boolean_val(q, 1))
300 ? "/home" : newstr(q);
303 modeset = setmode(q);
304 config.homemode = (q == NULL || !boolean_val(q, 1))
305 ? _DEF_DIRMODE : getmode(modeset, _DEF_DIRMODE);
309 config.shelldir = (q == NULL || !boolean_val(q, 1))
310 ? "/bin" : newstr(q);
313 for (i = 0; i < _UC_MAXSHELLS && q != NULL; i++, q = strtok(NULL, toks))
314 system_shells[i] = newstr(q);
316 while (i < _UC_MAXSHELLS)
317 system_shells[i++] = NULL;
319 case _UC_DEFAULTSHELL:
320 config.shell_default = (q == NULL || !boolean_val(q, 1))
321 ? (char *) bourne_shell : newstr(q);
323 case _UC_DEFAULTGROUP:
325 config.default_group = (q == NULL || !boolean_val(q, 1) || GETGRNAM(q) == NULL)
328 case _UC_EXTRAGROUPS:
329 for (i = 0; q != NULL; q = strtok(NULL, toks)) {
330 if (extendarray(&config.groups, &config.numgroups, i + 2) != -1)
331 config.groups[i++] = newstr(q);
334 while (i < config.numgroups)
335 config.groups[i++] = NULL;
337 case _UC_DEFAULTCLASS:
338 config.default_class = (q == NULL || !boolean_val(q, 1))
342 if ((q = unquote(q)) != NULL && isdigit(*q))
343 config.min_uid = (uid_t) atol(q);
346 if ((q = unquote(q)) != NULL && isdigit(*q))
347 config.max_uid = (uid_t) atol(q);
350 if ((q = unquote(q)) != NULL && isdigit(*q))
351 config.min_gid = (gid_t) atol(q);
354 if ((q = unquote(q)) != NULL && isdigit(*q))
355 config.max_gid = (gid_t) atol(q);
358 if ((q = unquote(q)) != NULL && isdigit(*q))
359 config.expire_days = atoi(q);
362 if ((q = unquote(q)) != NULL && isdigit(*q))
363 config.password_days = atoi(q);
379 write_userconfig(char const * file)
384 file = _PATH_PW_CONF;
386 if ((fd = open(file, O_CREAT | O_RDWR | O_TRUNC | O_EXLOCK, 0644)) != -1) {
389 if ((fp = fdopen(fd, "w")) == NULL)
394 char *buf = malloc(len);
396 for (i = _UC_NONE; i < _UC_FIELDS; i++) {
398 char const *val = buf;
403 val = boolean_str(config.default_password);
406 val = boolean_str(config.reuse_uids);
409 val = boolean_str(config.reuse_gids);
412 val = config.nispasswd ? config.nispasswd : "";
416 val = config.dotdir ? config.dotdir : boolean_str(0);
419 val = config.newmail ? config.newmail : boolean_str(0);
422 val = config.logfile ? config.logfile : boolean_str(0);
428 sprintf(buf, "%04o", config.homemode);
432 val = config.shelldir;
435 for (j = k = 0; j < _UC_MAXSHELLS && system_shells[j] != NULL; j++) {
437 int l = snprintf(lbuf, sizeof lbuf, "%s\"%s\"", k ? "," : "", system_shells[j]);
440 if (l + k + 1 < len || extendline(&buf, &len, len + LNBUFSZ) != -1) {
441 strcpy(buf + k, lbuf);
447 case _UC_DEFAULTSHELL:
448 val = config.shell_default ? config.shell_default : bourne_shell;
450 case _UC_DEFAULTGROUP:
451 val = config.default_group ? config.default_group : "";
453 case _UC_EXTRAGROUPS:
454 extendarray(&config.groups, &config.numgroups, 200);
455 for (j = k = 0; j < config.numgroups && config.groups[j] != NULL; j++) {
457 int l = snprintf(lbuf, sizeof lbuf, "%s\"%s\"", k ? "," : "", config.groups[j]);
460 if (l + k + 1 < len || extendline(&buf, &len, len + 1024) != -1) {
461 strcpy(buf + k, lbuf);
467 case _UC_DEFAULTCLASS:
468 val = config.default_class ? config.default_class : "";
471 sprintf(buf, "%lu", (unsigned long) config.min_uid);
475 sprintf(buf, "%lu", (unsigned long) config.max_uid);
479 sprintf(buf, "%lu", (unsigned long) config.min_gid);
483 sprintf(buf, "%lu", (unsigned long) config.max_gid);
487 sprintf(buf, "%d", config.expire_days);
491 sprintf(buf, "%d", config.password_days);
499 fputs(comments[i], fp);
503 fprintf(fp, "%s = \"%s\"\n", kwds[i], val);
505 fprintf(fp, "%s = %s\n", kwds[i], val);
507 printf("WROTE: %s = %s\n", kwds[i], val);
512 return fclose(fp) != EOF;