tzsetup: Fix VERBOSE reporting when removing _PATH_LOCALTIME for UTC.
[dragonfly.git] / usr.sbin / pw / pwupd.c
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  * $FreeBSD: src/usr.sbin/pw/pwupd.c,v 1.21 2008/07/17 13:47:59 jhb 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/param.h>
38 #include <sys/wait.h>
39
40 #include "pwupd.h"
41
42 #define HAVE_PWDB_C     1
43 #define HAVE_PWDB_U     1
44
45 static char pathpwd[] = _PATH_PWD;
46 static char * pwpath = pathpwd;
47  
48 int
49 setpwdir(const char * dir)
50 {
51         if (dir == NULL)
52                 return -1;
53         else {
54                 char * d = malloc(strlen(dir)+1);
55                 if (d == NULL)
56                         return -1;
57                 pwpath = strcpy(d, dir);
58         }
59         return 0;
60 }
61
62 char *
63 getpwpath(char const * file)
64 {
65         static char pathbuf[MAXPATHLEN];
66
67         snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
68         return pathbuf;
69 }
70
71 int
72 pwdb(char *arg,...)
73 {
74         int             i = 0;
75         pid_t           pid;
76         va_list         ap;
77         char           *args[10];
78
79         args[i++] = _PATH_PWD_MKDB;
80         va_start(ap, arg);
81         while (i < 6 && arg != NULL) {
82                 args[i++] = arg;
83                 arg = va_arg(ap, char *);
84         }
85         if (pwpath != pathpwd) {
86                 args[i++] = "-d";
87                 args[i++] = pwpath;
88         }
89         args[i++] = getpwpath(_MASTERPASSWD);
90         args[i] = NULL;
91
92         if ((pid = fork()) == -1)       /* Error (errno set) */
93                 i = errno;
94         else if (pid == 0) {    /* Child */
95                 execv(args[0], args);
96                 _exit(1);
97         } else {                /* Parent */
98                 waitpid(pid, &i, 0);
99                 if (WEXITSTATUS(i))
100                         i = EIO;
101         }
102         return i;
103 }
104
105 int
106 fmtpwentry(char *buf, struct passwd * pwd, int type)
107 {
108         int             l;
109         char           *pw;
110
111         pw = (type == PWF_MASTER) ?
112             ((pwd->pw_passwd == NULL) ? "" : pwd->pw_passwd) : "*";
113
114         if (type == PWF_PASSWD)
115                 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n",
116                        pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid,
117                             pwd->pw_gecos ? pwd->pw_gecos : "User &",
118                             pwd->pw_dir, pwd->pw_shell);
119         else
120                 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n",
121                    pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid,
122                             pwd->pw_class ? pwd->pw_class : "",
123                             (unsigned long) pwd->pw_change,
124                             (unsigned long) pwd->pw_expire,
125                             pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
126         return l;
127 }
128
129
130 int
131 fmtpwent(char *buf, struct passwd * pwd)
132 {
133         return fmtpwentry(buf, pwd, PWF_STANDARD);
134 }
135
136 static int
137 pw_update(struct passwd * pwd, char const * user, int mode)
138 {
139         int             rc = 0;
140
141         ENDPWENT();
142
143         /*
144          * First, let's check the see if the database is alright
145          * Note: -C is only available in FreeBSD 2.2 and above
146          */
147 #ifdef HAVE_PWDB_C
148         rc = pwdb("-C", NULL);  /* Check only */
149         if (rc == 0) {
150 #else
151         {                               /* No -C */
152 #endif
153                 char            pfx[PWBUFSZ];
154                 char            pwbuf[PWBUFSZ];
155                 int             l = snprintf(pfx, PWBUFSZ, "%s:", user);
156 #ifdef HAVE_PWDB_U
157                 int             isrename = pwd!=NULL && strcmp(user, pwd->pw_name);
158 #endif
159
160                 /*
161                  * Update the passwd file first
162                  */
163                 if (pwd == NULL)
164                         *pwbuf = '\0';
165                 else
166                         fmtpwentry(pwbuf, pwd, PWF_PASSWD);
167
168                 if (l < 0)
169                         l = 0;
170                 rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode);
171                 if (rc == 0) {
172
173                         /*
174                          * Then the master.passwd file
175                          */
176                         if (pwd != NULL)
177                                 fmtpwentry(pwbuf, pwd, PWF_MASTER);
178                         rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode);
179                         if (rc == 0) {
180 #ifdef HAVE_PWDB_U
181                                 if (mode == UPD_DELETE || isrename)
182 #endif
183                                         rc = pwdb(NULL);
184 #ifdef HAVE_PWDB_U
185                                 else
186                                         rc = pwdb("-u", user, NULL);
187 #endif
188                         }
189                 }
190         }
191         return rc;
192 }
193
194 int
195 addpwent(struct passwd * pwd)
196 {
197         return pw_update(pwd, pwd->pw_name, UPD_CREATE);
198 }
199
200 int
201 chgpwent(char const * login, struct passwd * pwd)
202 {
203         return pw_update(pwd, login, UPD_REPLACE);
204 }
205
206 int
207 delpwent(struct passwd * pwd)
208 {
209         return pw_update(NULL, pwd->pw_name, UPD_DELETE);
210 }