pw_scan.c revision 30260 
1/*-
2 * Copyright (c) 1990, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
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
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)pw_scan.c	8.3 (Berkeley) 4/2/94";
37#endif
38static const char rcsid[] =
39	"$Id$";
40#endif /* not lint */
41
42/*
43 * This module is used to "verify" password entries by chpass(1) and
44 * pwd_mkdb(8).
45 */
46
47#include <sys/param.h>
48
49#include <err.h>
50#include <fcntl.h>
51#include <pwd.h>
52#include <stdio.h>
53#include <string.h>
54#include <stdlib.h>
55#include <unistd.h>
56
57#include "pw_scan.h"
58
59int
60pw_scan(bp, pw)
61	char *bp;
62	struct passwd *pw;
63{
64	long id;
65	int root;
66	char *p, *sh;
67
68	pw->pw_fields = 0;
69	if (!(pw->pw_name = strsep(&bp, ":")))		/* login */
70		goto fmt;
71	root = !strcmp(pw->pw_name, "root");
72	if(pw->pw_name[0] && (pw->pw_name[0] != '+' || pw->pw_name[1] == '\0'))
73		pw->pw_fields |= _PWF_NAME;
74
75	if (!(pw->pw_passwd = strsep(&bp, ":")))	/* passwd */
76		goto fmt;
77	if(pw->pw_passwd[0]) pw->pw_fields |= _PWF_PASSWD;
78
79	if (!(p = strsep(&bp, ":")))			/* uid */
80		goto fmt;
81	if(p[0]) pw->pw_fields |= _PWF_UID;
82	id = atol(p);
83	if (root && id) {
84		warnx("root uid should be 0");
85		return (0);
86	}
87	if (id > USHRT_MAX) {
88		warnx("%s > max uid value (%d)", p, USHRT_MAX);
89		/*return (0);*/ /* THIS SHOULD NOT BE FATAL! */
90	}
91	pw->pw_uid = id;
92
93	if (!(p = strsep(&bp, ":")))			/* gid */
94		goto fmt;
95	if(p[0]) pw->pw_fields |= _PWF_GID;
96	id = atol(p);
97	if (id > USHRT_MAX) {
98		warnx("%s > max gid value (%d)", p, USHRT_MAX);
99		/* return (0); This should not be fatal! */
100	}
101	pw->pw_gid = id;
102
103	pw->pw_class = strsep(&bp, ":");		/* class */
104	if(pw->pw_class[0]) pw->pw_fields |= _PWF_CLASS;
105
106	if (!(p = strsep(&bp, ":")))			/* change */
107		goto fmt;
108	if(p[0]) pw->pw_fields |= _PWF_CHANGE;
109	pw->pw_change = atol(p);
110
111	if (!(p = strsep(&bp, ":")))			/* expire */
112		goto fmt;
113	if(p[0]) pw->pw_fields |= _PWF_EXPIRE;
114	pw->pw_expire = atol(p);
115
116	if (!(pw->pw_gecos = strsep(&bp, ":")))		/* gecos */
117		goto fmt;
118	if(pw->pw_gecos[0]) pw->pw_fields |= _PWF_GECOS;
119
120	if (!(pw->pw_dir = strsep(&bp, ":")))			/* directory */
121		goto fmt;
122	if(pw->pw_dir[0]) pw->pw_fields |= _PWF_DIR;
123
124	if (!(pw->pw_shell = strsep(&bp, ":")))		/* shell */
125		goto fmt;
126
127	p = pw->pw_shell;
128	if (root && *p)					/* empty == /bin/sh */
129		for (setusershell();;) {
130			if (!(sh = getusershell())) {
131				warnx("warning, unknown root shell");
132				break;
133			}
134			if (!strcmp(p, sh))
135				break;
136		}
137	if(p[0]) pw->pw_fields |= _PWF_SHELL;
138
139	if ((p = strsep(&bp, ":"))) {			/* too many */
140fmt:		warnx("corrupted entry");
141		return (0);
142	}
143	return (1);
144}
145