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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)pw_scan.c 8.3 (Berkeley) 4/2/94";
36 #endif /* LIBC_SCCS and not lint */
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
41 * This module is used to "verify" password entries by chpass(1) and
45 #include <sys/param.h>
59 * Some software assumes that IDs are short. We should emit warnings
60 * for id's which cannot be stored in a short, but we are more liberal
61 * by default, warning for IDs greater than USHRT_MAX.
63 * If pw_big_ids_warning is -1 on entry to pw_scan(), it will be set based
64 * on the existence of PW_SCAN_BIG_IDS in the environment.
66 static int pw_big_ids_warning = -1;
69 __pw_scan(char *bp, struct passwd *pw, int flags)
75 if (pw_big_ids_warning == -1)
76 pw_big_ids_warning = getenv("PW_SCAN_BIG_IDS") == NULL ? 1 : 0;
79 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */
81 root = !strcmp(pw->pw_name, "root");
82 if (pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
83 pw->pw_fields |= _PWF_NAME;
85 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */
88 pw->pw_fields |= _PWF_PASSWD;
90 if (!(p = strsep(&bp, ":"))) /* uid */
93 pw->pw_fields |= _PWF_UID;
95 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
96 if (flags & _PWSCAN_WARN)
97 warnx("no uid for user %s", pw->pw_name);
101 id = strtoul(p, &ep, 10);
102 if (errno == ERANGE) {
103 if (flags & _PWSCAN_WARN)
104 warnx("%s > max uid value (%lu)", p, ULONG_MAX);
108 if (flags & _PWSCAN_WARN)
109 warnx("%s uid is incorrect", p);
113 if (flags & _PWSCAN_WARN)
114 warnx("root uid should be 0");
117 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
118 warnx("%s > recommended max uid value (%u)", p, USHRT_MAX);
119 /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
123 if (!(p = strsep(&bp, ":"))) /* gid */
126 pw->pw_fields |= _PWF_GID;
128 if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
129 if (flags & _PWSCAN_WARN)
130 warnx("no gid for user %s", pw->pw_name);
134 id = strtoul(p, &ep, 10);
135 if (errno == ERANGE) {
136 if (flags & _PWSCAN_WARN)
137 warnx("%s > max gid value (%lu)", p, ULONG_MAX);
141 if (flags & _PWSCAN_WARN)
142 warnx("%s gid is incorrect", p);
145 if (flags & _PWSCAN_WARN && pw_big_ids_warning && id > USHRT_MAX) {
146 warnx("%s > recommended max gid value (%u)", p, USHRT_MAX);
147 /* return (0); This should not be fatal! */
151 if (flags & _PWSCAN_MASTER ) {
152 if (!(pw->pw_class = strsep(&bp, ":"))) /* class */
155 pw->pw_fields |= _PWF_CLASS;
157 if (!(p = strsep(&bp, ":"))) /* change */
160 pw->pw_fields |= _PWF_CHANGE;
161 pw->pw_change = atol(p);
163 if (!(p = strsep(&bp, ":"))) /* expire */
166 pw->pw_fields |= _PWF_EXPIRE;
167 pw->pw_expire = atol(p);
169 if (!(pw->pw_gecos = strsep(&bp, ":"))) /* gecos */
172 pw->pw_fields |= _PWF_GECOS;
174 if (!(pw->pw_dir = strsep(&bp, ":"))) /* directory */
177 pw->pw_fields |= _PWF_DIR;
179 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */
183 if (root && *p) { /* empty == /bin/sh */
184 for (setusershell();;) {
185 if (!(sh = getusershell())) {
186 if (flags & _PWSCAN_WARN)
187 warnx("warning, unknown root shell");
196 pw->pw_fields |= _PWF_SHELL;
198 if ((p = strsep(&bp, ":"))) { /* too many */
200 if (flags & _PWSCAN_WARN)
201 warnx("corrupted entry");