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
45 static char spwbuf[BUFSIZ];
46 static struct spwd spwd;
51 /* setspent - initialize access to shadow text and DBM files */
57 shadow = bb_xfopen(bb_path_shadow_file, "r");
61 /* endspent - terminate access to shadow text and DBM files */
65 (void) fclose(shadow);
69 /* getspent - get a (struct spwd *) from the current shadow file */
70 struct spwd *getspent(void)
74 return (fgetspent(shadow));
77 /* getspnam - get a shadow entry by name */
78 struct spwd *getspnam(const char *name)
82 if (!name || !strlen(name))
86 while ((sp = getspent()) != NULL) {
87 if (strcmp(name, sp->sp_namp) == 0)
95 /* sgetspent - convert string in shadow file format to (struct spwd *) */
96 /* returns NULL on error */
97 struct spwd *sgetspent(const char *string)
105 * Copy string to local buffer. It has to be tokenized and we
106 * have to do that to our private copy.
109 if (strlen(string) >= sizeof spwbuf)
112 strcpy(spwbuf, string);
114 if ((cp = strrchr(spwbuf, '\n')))
118 * Tokenize the string into colon separated fields. Allow up to
119 * FIELDS different fields.
122 for (cp = spwbuf, i = 0; *cp && i < FIELDS; i++) {
124 while (*cp && *cp != ':')
132 * It is acceptable for the last SVR4 field to be blank. This
133 * results in the loop being terminated early. In which case,
134 * we just make the last field be blank and be done with it.
137 if (i == (FIELDS - 1))
140 if ((cp && *cp) || (i != FIELDS && i != OFIELDS))
145 * Start populating the structure. The fields are all in
146 * static storage, as is the structure we pass back. If we
147 * ever see a name with '+' as the first character, we try
148 * to turn on NIS processing.
151 spwd.sp_namp = fields[0];
152 spwd.sp_pwdp = fields[1];
155 * Get the last changed date. For all of the integer fields,
156 * we check for proper format. It is an error to have an
157 * incorrectly formatted number, unless we are using NIS.
160 if ((spwd.sp_lstchg = strtol(fields[2], &cpp, 10)) == 0 && *cpp) {
163 } else if (fields[2][0] == '\0')
167 * Get the minimum period between password changes.
170 if ((spwd.sp_min = strtol(fields[3], &cpp, 10)) == 0 && *cpp) {
173 } else if (fields[3][0] == '\0')
177 * Get the maximum number of days a password is valid.
180 if ((spwd.sp_max = strtol(fields[4], &cpp, 10)) == 0 && *cpp) {
183 } else if (fields[4][0] == '\0')
187 * If there are only OFIELDS fields (this is a SVR3.2 /etc/shadow
188 * formatted file), initialize the other field members to -1.
192 spwd.sp_warn = spwd.sp_inact = spwd.sp_expire = spwd.sp_flag = -1;
198 * The rest of the fields are mandatory for SVR4, but optional
199 * for anything else. However, if one is present the others
204 * Get the number of days of password expiry warning.
207 if ((spwd.sp_warn = strtol(fields[5], &cpp, 10)) == 0 && *cpp) {
210 } else if (fields[5][0] == '\0')
214 * Get the number of days of inactivity before an account is
218 if ((spwd.sp_inact = strtol(fields[6], &cpp, 10)) == 0 && *cpp) {
221 } else if (fields[6][0] == '\0')
225 * Get the number of days after the epoch before the account is
229 if ((spwd.sp_expire = strtol(fields[7], &cpp, 10)) == 0 && *cpp) {
232 } else if (fields[7][0] == '\0')
236 * This field is reserved for future use. But it isn't supposed
237 * to have anything other than a valid integer in it.
240 if ((spwd.sp_flag = strtol(fields[8], &cpp, 10)) == 0 && *cpp) {
243 } else if (fields[8][0] == '\0')
249 /* fgetspent - get an entry from an /etc/shadow formatted stream */
250 struct spwd *fgetspent(FILE *fp)
259 if (fgets(buf, sizeof buf, fp) != (char *) 0) {
260 if ((cp = strchr(buf, '\n')))
262 return (sgetspent(buf));
269 * putspent - put a (struct spwd *) into the (FILE *) you provide.
271 * this was described in shadow_.h but not implemented, so here
275 int putspent(const struct spwd *sp, FILE *fp)
280 ret = fseek(fp, 0, SEEK_END);
286 /* powered by fprintf */
287 fprintf(fp, "%s:%s:%ld:%ld:%ld:%ld:%ld:%ld:%s\n", sp->sp_namp, /* login name */
288 sp->sp_pwdp, /* encrypted password */
289 sp->sp_lstchg, /* date of last change */
290 sp->sp_min, /* minimum number of days between changes */
291 sp->sp_max, /* maximum number of days between changes */
292 sp->sp_warn, /* number of days of warning before password expires */
293 sp->sp_inact, /* number of days after password expires until
294 the account becomes unusable */
295 sp->sp_expire, /* days since 1/1/70 until account expires */