2 * Copyright (c) 1990, 1993, 1994
3 * The Regents of the University of California. 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.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid[] = "@(#)pw_scan.c 8.3 (Berkeley) 4/2/94";
32 #endif /* LIBC_SCCS and not lint */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 * This module is used to "verify" password entries by chpass(1) and
41 #include <sys/param.h>
55 * Some software assumes that IDs are short. We should emit warnings
56 * for id's which cannot be stored in a short, but we are more liberal
57 * by default, warning for IDs greater than USHRT_MAX.
59 * If pw_big_ids_warning is -1 on entry to pw_scan(), it will be set based
60 * on the existence of PW_SCAN_BIG_IDS in the environment.
62 * It is believed all baseline system software that can not handle the
63 * normal ID sizes is now gone so pw_big_ids_warning is disabled for now.
64 * But the code has been left in place in case end-users want to re-enable
65 * it and/or for the next time the ID sizes get bigger but pieces of the
68 static int pw_big_ids_warning = 0;
71 __pw_scan(char *bp, struct passwd *pw, int flags)
78 if (pw_big_ids_warning == -1)
79 pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
82 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
84 root = !strcmp(pw->pw_name, "root");
85 if (pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
86 pw->pw_fields |= _PWF_NAME;
88 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
91 pw->pw_fields |= _PWF_PASSWD;
93 if (!(p = strsep(&bp, ":"))) /* uid */
96 pw->pw_fields |= _PWF_UID;
98 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
99 if (flags & _PWSCAN_WARN)
100 warnx("no uid for user %s", pw->pw_name);
105 temp = strtoul(p, &ep, 10);
106 if ((temp == ULONG_MAX && errno == ERANGE) || temp > UID_MAX) {
107 if (flags & _PWSCAN_WARN)
108 warnx("%s > max uid value (%u)", p, UID_MAX);
113 if (flags & _PWSCAN_WARN)
114 warnx("%s uid is incorrect", p);
118 if (flags & _PWSCAN_WARN)
119 warnx("root uid should be 0");
122 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
123 warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
124 /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
128 if (!(p = strsep(&bp, ":"))) /* gid */
131 pw->pw_fields |= _PWF_GID;
133 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
134 if (flags & _PWSCAN_WARN)
135 warnx("no gid for user %s", pw->pw_name);
140 temp = strtoul(p, &ep, 10);
141 if ((temp == ULONG_MAX && errno == ERANGE) || temp > GID_MAX) {
142 if (flags & _PWSCAN_WARN)
143 warnx("%s > max gid value (%u)", p, GID_MAX);
148 if (flags & _PWSCAN_WARN)
149 warnx("%s gid is incorrect", p);
152 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
153 warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
154 /* return (0); This should not be fatal! */
158 if (flags & _PWSCAN_MASTER ) {
159 if (!(pw->pw_class = strsep(&bp, ":"))) /* class */
162 pw->pw_fields |= _PWF_CLASS;
164 if (!(p = strsep(&bp, ":"))) /* change */
167 pw->pw_fields |= _PWF_CHANGE;
168 pw->pw_change = atol(p);
170 if (!(p = strsep(&bp, ":"))) /* expire */
173 pw->pw_fields |= _PWF_EXPIRE;
174 pw->pw_expire = atol(p);
176 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
179 pw->pw_fields |= _PWF_GECOS;
181 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
184 pw->pw_fields |= _PWF_DIR;
186 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
190 if (root && *p) { /* empty == /bin/sh */
191 for (setusershell();;) {
192 if (!(sh = getusershell())) {
193 if (flags & _PWSCAN_WARN)
194 warnx("warning, unknown root shell");
203 pw->pw_fields |= _PWF_SHELL;
205 if ((p = strsep(&bp, ":"))) { /* too many */
207 if (flags & _PWSCAN_WARN)
208 warnx("corrupted entry");