1 /* vi: set sw=4 ts=4: */
3 * Copyright 1989 - 1994, Julianne Frances Haugh
4 * <jockgrrl@austin.rr.com>, <jfh@austin.ibm.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of Julianne F. Haugh nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 /* TODO: fgetspent_r.c getspent_r.c getspnam_r.c sgetspent_r.c
46 static char spwbuf[BUFSIZ];
47 static struct spwd spwd;
52 /* setspent - initialize access to shadow text and DBM files */
58 if ((shadow = fopen("/etc/shadow", "r")) == NULL)
59 perror_msg_and_die("/etc/shadow");
63 /* endspent - terminate access to shadow text and DBM files */
67 (void) fclose(shadow);
71 /* getspent - get a (struct spwd *) from the current shadow file */
72 struct spwd *getspent(void)
76 return (fgetspent(shadow));
79 /* getspnam - get a shadow entry by name */
80 struct spwd *getspnam(const char *name)
84 if (!name || !strlen(name))
88 while ((sp = getspent()) != NULL) {
89 if (strcmp(name, sp->sp_namp) == 0)
97 /* sgetspent - convert string in shadow file format to (struct spwd *) */
98 /* returns NULL on error */
99 struct spwd *sgetspent(const char *string)
101 char *fields[FIELDS];
107 * Copy string to local buffer. It has to be tokenized and we
108 * have to do that to our private copy.
111 if (strlen(string) >= sizeof spwbuf)
114 strcpy(spwbuf, string);
116 if ((cp = strrchr(spwbuf, '\n')))
120 * Tokenize the string into colon separated fields. Allow up to
121 * FIELDS different fields.
124 for (cp = spwbuf, i = 0; *cp && i < FIELDS; i++) {
126 while (*cp && *cp != ':')
134 * It is acceptable for the last SVR4 field to be blank. This
135 * results in the loop being terminated early. In which case,
136 * we just make the last field be blank and be done with it.
139 if (i == (FIELDS - 1))
142 if ((cp && *cp) || (i != FIELDS && i != OFIELDS))
147 * Start populating the structure. The fields are all in
148 * static storage, as is the structure we pass back. If we
149 * ever see a name with '+' as the first character, we try
150 * to turn on NIS processing.
153 spwd.sp_namp = fields[0];
154 spwd.sp_pwdp = fields[1];
157 * Get the last changed date. For all of the integer fields,
158 * we check for proper format. It is an error to have an
159 * incorrectly formatted number, unless we are using NIS.
162 if ((spwd.sp_lstchg = strtol(fields[2], &cpp, 10)) == 0 && *cpp) {
165 } else if (fields[2][0] == '\0')
169 * Get the minimum period between password changes.
172 if ((spwd.sp_min = strtol(fields[3], &cpp, 10)) == 0 && *cpp) {
175 } else if (fields[3][0] == '\0')
179 * Get the maximum number of days a password is valid.
182 if ((spwd.sp_max = strtol(fields[4], &cpp, 10)) == 0 && *cpp) {
185 } else if (fields[4][0] == '\0')
189 * If there are only OFIELDS fields (this is a SVR3.2 /etc/shadow
190 * formatted file), initialize the other field members to -1.
194 spwd.sp_warn = spwd.sp_inact = spwd.sp_expire = spwd.sp_flag = -1;
200 * The rest of the fields are mandatory for SVR4, but optional
201 * for anything else. However, if one is present the others
206 * Get the number of days of password expiry warning.
209 if ((spwd.sp_warn = strtol(fields[5], &cpp, 10)) == 0 && *cpp) {
212 } else if (fields[5][0] == '\0')
216 * Get the number of days of inactivity before an account is
220 if ((spwd.sp_inact = strtol(fields[6], &cpp, 10)) == 0 && *cpp) {
223 } else if (fields[6][0] == '\0')
227 * Get the number of days after the epoch before the account is
231 if ((spwd.sp_expire = strtol(fields[7], &cpp, 10)) == 0 && *cpp) {
234 } else if (fields[7][0] == '\0')
238 * This field is reserved for future use. But it isn't supposed
239 * to have anything other than a valid integer in it.
242 if ((spwd.sp_flag = strtol(fields[8], &cpp, 10)) == 0 && *cpp) {
245 } else if (fields[8][0] == '\0')
251 /* fgetspent - get an entry from an /etc/shadow formatted stream */
252 struct spwd *fgetspent(FILE *fp)
261 if (fgets(buf, sizeof buf, fp) != (char *) 0) {
262 if ((cp = strchr(buf, '\n')))
264 return (sgetspent(buf));
271 * putspent - put a (struct spwd *) into the (FILE *) you provide.
273 * this was described in shadow_.h but not implemented, so here
277 int putspent(const struct spwd *sp, FILE *fp)
282 ret = fseek(fp, 0, SEEK_END);
288 /* powered by fprintf */
289 fprintf(fp, "%s:%s:%ld:%ld:%ld:%ld:%ld:%ld:%s\n", sp->sp_namp, /* login name */
290 sp->sp_pwdp, /* encrypted password */
291 sp->sp_lstchg, /* date of last change */
292 sp->sp_min, /* minimum number of days between changes */
293 sp->sp_max, /* maximum number of days between changes */
294 sp->sp_warn, /* number of days of warning before password expires */
295 sp->sp_inact, /* number of days after password expires until
296 the account becomes unusable */
297 sp->sp_expire, /* days since 1/1/70 until account expires */