aboutsummaryrefslogtreecommitdiffstats
path: root/usr.sbin/pw/pwupd.c
blob: b95e24b2bc69f2b4f08cd309a0072866d197809b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*-
 * Copyright (C) 1996
 *	David L. Nugent.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char rcsid[] =
  "$FreeBSD$";
#endif /* not lint */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdarg.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/wait.h>

#include "pwupd.h"

#define HAVE_PWDB_C	1
#define	HAVE_PWDB_U	1

static char pathpwd[] = _PATH_PWD;
static char * pwpath = pathpwd;
 
int
setpwdir(const char * dir)
{
	if (dir == NULL)
		return -1;
	else {
		char * d = malloc(strlen(dir)+1);
		if (d == NULL)
			return -1;
		pwpath = strcpy(d, dir);
	}
	return 0;
}

char *
getpwpath(char const * file)
{
	static char pathbuf[MAXPATHLEN];

	snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
	return pathbuf;
}

int
pwdb(char *arg,...)
{
	int             i = 0;
	pid_t           pid;
	va_list         ap;
	char           *args[10];

	args[i++] = _PATH_PWD_MKDB;
	va_start(ap, arg);
	while (i < 6 && arg != NULL) {
		args[i++] = arg;
		arg = va_arg(ap, char *);
	}
	if (pwpath != pathpwd) {
		args[i++] = "-d";
		args[i++] = pwpath;
	}
	args[i++] = getpwpath(_MASTERPASSWD);
	args[i] = NULL;

	if ((pid = fork()) == -1)	/* Error (errno set) */
		i = errno;
	else if (pid == 0) {	/* Child */
		execv(args[0], args);
		_exit(1);
	} else {		/* Parent */
		waitpid(pid, &i, 0);
		if (WEXITSTATUS(i))
			i = EIO;
	}
	return i;
}

int
fmtpwentry(char *buf, struct passwd * pwd, int type)
{
	int             l;
	char           *pw;

	pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*";

	if (type == PWF_PASSWD)
		l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n",
		       pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid,
			    pwd->pw_gecos ? pwd->pw_gecos : "User &",
			    pwd->pw_dir, pwd->pw_shell);
	else
		l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n",
		   pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid,
			    pwd->pw_class ? pwd->pw_class : "",
			    (unsigned long) pwd->pw_change,
			    (unsigned long) pwd->pw_expire,
			    pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
	return l;
}


int
fmtpwent(char *buf, struct passwd * pwd)
{
	return fmtpwentry(buf, pwd, PWF_STANDARD);
}

static int
pw_update(struct passwd * pwd, char const * user, int mode)
{
	int             rc = 0;

	ENDPWENT();

	/*
	 * First, let's check the see if the database is alright
	 * Note: -C is only available in FreeBSD 2.2 and above
	 */
#ifdef HAVE_PWDB_C
	if (pwdb("-C", NULL) == 0) {	/* Check only */
#else
	{				/* No -C */
#endif
		char            pfx[PWBUFSZ];
		char            pwbuf[PWBUFSZ];
		int             l = snprintf(pfx, PWBUFSZ, "%s:", user);
#ifdef HAVE_PWDB_U
		int		isrename = pwd!=NULL && strcmp(user, pwd->pw_name);
#endif

		/*
		 * Update the passwd file first
		 */
		if (pwd == NULL)
			*pwbuf = '\0';
		else
			fmtpwentry(pwbuf, pwd, PWF_PASSWD);

		rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode);
		if (rc == 0) {

			/*
			 * Then the master.passwd file
			 */
			if (pwd != NULL)
				fmtpwentry(pwbuf, pwd, PWF_MASTER);
			rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode);
			if (rc == 0) {
#ifdef HAVE_PWDB_U
				if (mode == UPD_DELETE || isrename)
#endif
					rc = pwdb(NULL);
#ifdef HAVE_PWDB_U
				else
					rc = pwdb("-u", user, NULL);
#endif
			}
		}
	}
	return rc;
}

int
addpwent(struct passwd * pwd)
{
	return pw_update(pwd, pwd->pw_name, UPD_CREATE);
}

int
chgpwent(char const * login, struct passwd * pwd)
{
	return pw_update(pwd, login, UPD_REPLACE);
}

int
delpwent(struct passwd * pwd)
{
	return pw_update(NULL, pwd->pw_name, UPD_DELETE);
}