pwupd.c revision 20302 
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 *	$Id: pwupd.c,v 1.1.1.2 1996/12/09 23:55:27 joerg Exp $
27 */
28
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <unistd.h>
33#include <stdarg.h>
34#include <errno.h>
35#include <sys/types.h>
36#include <sys/stat.h>
37#include <sys/wait.h>
38#include <stdarg.h>
39
40#include "pwupd.h"
41
42#define HAVE_PWDB_C	1
43
44static int
45pwdb(char *arg,...)
46{
47	int             i = 0;
48	pid_t           pid;
49	va_list         ap;
50	char           *args[8];
51
52	args[i++] = _PATH_PWD_MKDB;
53	va_start(ap, arg);
54	while (i < 6 && arg != NULL) {
55		args[i++] = arg;
56		arg = va_arg(ap, char *);
57	}
58	args[i++] = _PATH_MASTERPASSWD;
59	args[i] = NULL;
60
61	if ((pid = fork()) == -1)	/* Error (errno set) */
62		i = -1;
63	else if (pid == 0) {	/* Child */
64		execv(args[0], args);
65		_exit(1);
66	} else {		/* Parent */
67		waitpid(pid, &i, 0);
68		if ((i = WEXITSTATUS(i)) != 0)
69			errno = EIO;	/* set SOMETHING */
70	}
71	return i;
72}
73
74int
75fmtpwentry(char *buf, struct passwd * pwd, int type)
76{
77	int             l;
78	char           *pw;
79
80	pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*";
81
82	if (type == PWF_PASSWD)
83		l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n",
84		       pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid,
85			    pwd->pw_gecos ? pwd->pw_gecos : "User &",
86			    pwd->pw_dir, pwd->pw_shell);
87	else
88		l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n",
89		   pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid,
90			    pwd->pw_class ? pwd->pw_class : "",
91			    (unsigned long) pwd->pw_change,
92			    (unsigned long) pwd->pw_expire,
93			    pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
94	return l;
95}
96
97
98int
99fmtpwent(char *buf, struct passwd * pwd)
100{
101	return fmtpwentry(buf, pwd, PWF_STANDARD);
102}
103
104static int
105pw_update(struct passwd * pwd, char const * user, int mode)
106{
107	int             rc = 0;
108
109	endpwent();
110
111	/*
112	 * First, let's check the see if the database is alright
113	 * Note: -c is only available in FreeBSD 2.2 and above
114	 */
115#ifdef HAVE_PWDB_C
116	if (pwdb("-c", NULL) == 0) {	/* Check only */
117#else
118	{				/* No -c */
119#endif
120		char            pfx[32];
121		char            pwbuf[MAXPWLINE];
122		int             l = sprintf(pfx, "%s:", user);
123
124		/*
125		 * Update the passwd file first
126		 */
127		if (pwd == NULL)
128			*pwbuf = '\0';
129		else
130			fmtpwentry(pwbuf, pwd, PWF_PASSWD);
131		if ((rc = fileupdate(_PATH_PASSWD, 0644, pwbuf, pfx, l, mode)) != 0) {
132
133			/*
134			 * Then the master.passwd file
135			 */
136			if (pwd != NULL)
137				fmtpwentry(pwbuf, pwd, PWF_MASTER);
138			if ((rc = fileupdate(_PATH_MASTERPASSWD, 0644, pwbuf, pfx, l, mode)) != 0)
139				rc = pwdb(NULL) == 0;
140		}
141	}
142	return rc;
143}
144
145int
146addpwent(struct passwd * pwd)
147{
148	return pw_update(pwd, pwd->pw_name, UPD_CREATE);
149}
150
151int
152chgpwent(char const * login, struct passwd * pwd)
153{
154	return pw_update(pwd, login, UPD_REPLACE);
155}
156
157int
158delpwent(struct passwd * pwd)
159{
160	return pw_update(NULL, pwd->pw_name, UPD_DELETE);
161}
162