1/*-
2 * Copyright (C) 1996
3 *	David L. Nugent.  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 *
14 * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#ifndef lint
28static const char rcsid[] =
29  "$FreeBSD$";
30#endif /* not lint */
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <unistd.h>
36#include <stdarg.h>
37#include <pwd.h>
38#include <libutil.h>
39#include <errno.h>
40#include <err.h>
41#include <sys/types.h>
42#include <sys/stat.h>
43#include <sys/param.h>
44#include <sys/wait.h>
45
46#include "pwupd.h"
47
48static char pathpwd[] = _PATH_PWD;
49static char * pwpath = pathpwd;
50
51int
52setpwdir(const char * dir)
53{
54	if (dir == NULL)
55		return -1;
56	else
57		pwpath = strdup(dir);
58	if (pwpath == NULL)
59		return -1;
60	return 0;
61}
62
63char *
64getpwpath(char const * file)
65{
66	static char pathbuf[MAXPATHLEN];
67
68	snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
69	return pathbuf;
70}
71
72static int
73pwdb(char *arg,...)
74{
75	int             i = 0;
76	pid_t           pid;
77	va_list         ap;
78	char           *args[10];
79
80	args[i++] = _PATH_PWD_MKDB;
81	va_start(ap, arg);
82	while (i < 6 && arg != NULL) {
83		args[i++] = arg;
84		arg = va_arg(ap, char *);
85	}
86	if (pwpath != pathpwd) {
87		args[i++] = "-d";
88		args[i++] = pwpath;
89	}
90	args[i++] = getpwpath(_MASTERPASSWD);
91	args[i] = NULL;
92
93	if ((pid = fork()) == -1)	/* Error (errno set) */
94		i = errno;
95	else if (pid == 0) {	/* Child */
96		execv(args[0], args);
97		_exit(1);
98	} else {		/* Parent */
99		waitpid(pid, &i, 0);
100		if (WEXITSTATUS(i))
101			i = EIO;
102	}
103	va_end(ap);
104	return i;
105}
106
107static int
108pw_update(struct passwd * pwd, char const * user)
109{
110	int             rc = 0;
111
112	rc = pwdb("-C", (char *)NULL);	/* Check only */
113	if (rc == 0) {
114		int pfd, tfd;
115		struct passwd *pw = NULL;
116		struct passwd *old_pw = NULL;
117
118		if (pwd != NULL)
119			pw = pw_dup(pwd);
120
121		if (user != NULL)
122			old_pw = GETPWNAM(user);
123
124		if (pw_init(pwpath, NULL))
125			err(1, "pw_init()");
126		if ((pfd = pw_lock()) == -1) {
127			pw_fini();
128			err(1, "pw_lock()");
129		}
130		if ((tfd = pw_tmp(-1)) == -1) {
131			pw_fini();
132			err(1, "pw_tmp()");
133		}
134		if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
135			pw_fini();
136			err(1, "pw_copy()");
137		}
138		/*
139		 * in case of deletion of a user, the whole database
140		 * needs to be regenerated
141		 */
142		if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) {
143			pw_fini();
144			err(1, "pw_mkdb()");
145		}
146		free(pw);
147		pw_fini();
148	}
149	return 0;
150}
151
152int
153addpwent(struct passwd * pwd)
154{
155	return pw_update(pwd, NULL);
156}
157
158int
159chgpwent(char const * login, struct passwd * pwd)
160{
161	return pw_update(pwd, login);
162}
163
164int
165delpwent(struct passwd * pwd)
166{
167	char login[MAXLOGNAME];
168
169	strlcpy(login, pwd->pw_name, MAXLOGNAME);
170	return pw_update(NULL, login);
171}
172