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
29 * $FreeBSD: src/lib/libc/gen/pw_scan.c,v 1.25 2004/01/18 21:33:25 charnier Exp $
30 * $DragonFly: src/lib/libutil/pw_scan.c,v 1.3 2007/12/30 13:44:33 matthias Exp $
34 * This module is used to "verify" password entries by chpass(1) and
38 #include <sys/param.h>
52 * Some software assumes that IDs are short. We should emit warnings
53 * for id's which cannot be stored in a short, but we are more liberal
54 * by default, warning for IDs greater than USHRT_MAX.
56 * If pw_big_ids_warning is -1 on entry to pw_scan(), it will be set based
57 * on the existence of PW_SCAN_BIG_IDS in the environment.
59 static int pw_big_ids_warning
= -1;
62 __pw_scan(char *bp
, struct passwd
*pw
, int flags
)
68 if (pw_big_ids_warning
== -1)
69 pw_big_ids_warning
= getenv("PW_SCAN_BIG_IDS") == NULL
? 1 : 0;
72 if (!(pw
->pw_name
= strsep(&bp
, ":"))) /* login */
74 root
= !strcmp(pw
->pw_name
, "root");
75 if (pw
->pw_name
[0] && (pw
->pw_name
[0] != '+' || pw
->pw_name
[1] == '\0'))
76 pw
->pw_fields
|= _PWF_NAME
;
78 if (!(pw
->pw_passwd
= strsep(&bp
, ":"))) /* passwd */
81 pw
->pw_fields
|= _PWF_PASSWD
;
83 if (!(p
= strsep(&bp
, ":"))) /* uid */
86 pw
->pw_fields
|= _PWF_UID
;
88 if (pw
->pw_name
[0] != '+' && pw
->pw_name
[0] != '-') {
89 if (flags
& _PWSCAN_WARN
)
90 warnx("no uid for user %s", pw
->pw_name
);
94 id
= strtoul(p
, &ep
, 10);
95 if (errno
== ERANGE
) {
96 if (flags
& _PWSCAN_WARN
)
97 warnx("%s > max uid value (%lu)", p
, ULONG_MAX
);
101 if (flags
& _PWSCAN_WARN
)
102 warnx("%s uid is incorrect", p
);
106 if (flags
& _PWSCAN_WARN
)
107 warnx("root uid should be 0");
110 if (flags
& _PWSCAN_WARN
&& pw_big_ids_warning
&& id
> USHRT_MAX
) {
111 warnx("%s > recommended max uid value (%u)", p
, USHRT_MAX
);
112 /*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
116 if (!(p
= strsep(&bp
, ":"))) /* gid */
119 pw
->pw_fields
|= _PWF_GID
;
121 if (pw
->pw_name
[0] != '+' && pw
->pw_name
[0] != '-') {
122 if (flags
& _PWSCAN_WARN
)
123 warnx("no gid for user %s", pw
->pw_name
);
127 id
= strtoul(p
, &ep
, 10);
128 if (errno
== ERANGE
) {
129 if (flags
& _PWSCAN_WARN
)
130 warnx("%s > max gid value (%lu)", p
, ULONG_MAX
);
134 if (flags
& _PWSCAN_WARN
)
135 warnx("%s gid is incorrect", p
);
138 if (flags
& _PWSCAN_WARN
&& pw_big_ids_warning
&& id
> USHRT_MAX
) {
139 warnx("%s > recommended max gid value (%u)", p
, USHRT_MAX
);
140 /* return (0); This should not be fatal! */
144 if (flags
& _PWSCAN_MASTER
) {
145 if (!(pw
->pw_class
= strsep(&bp
, ":"))) /* class */
148 pw
->pw_fields
|= _PWF_CLASS
;
150 if (!(p
= strsep(&bp
, ":"))) /* change */
153 pw
->pw_fields
|= _PWF_CHANGE
;
154 pw
->pw_change
= atol(p
);
156 if (!(p
= strsep(&bp
, ":"))) /* expire */
159 pw
->pw_fields
|= _PWF_EXPIRE
;
160 pw
->pw_expire
= atol(p
);
162 if (!(pw
->pw_gecos
= strsep(&bp
, ":"))) /* gecos */
165 pw
->pw_fields
|= _PWF_GECOS
;
167 if (!(pw
->pw_dir
= strsep(&bp
, ":"))) /* directory */
170 pw
->pw_fields
|= _PWF_DIR
;
172 if (!(pw
->pw_shell
= strsep(&bp
, ":"))) /* shell */
176 if (root
&& *p
) { /* empty == /bin/sh */
177 for (setusershell();;) {
178 if (!(sh
= getusershell())) {
179 if (flags
& _PWSCAN_WARN
)
180 warnx("warning, unknown root shell");
189 pw
->pw_fields
|= _PWF_SHELL
;
191 if ((p
= strsep(&bp
, ":"))) { /* too many */
193 if (flags
& _PWSCAN_WARN
)
194 warnx("corrupted entry");