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  *      $Id: pwupd.c,v 1.1.1.3 1996/12/10 23:59:02 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
  44 static int
  45 pwdb(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
  74 int
  75 fmtpwentry(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
  98 int
  99 fmtpwent(char *buf, struct passwd * pwd)
 100 {
 101         return fmtpwentry(buf, pwd, PWF_STANDARD);
 102 }
 103
 104 static int
 105 pw_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[PWBUFSZ];
 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
 145 int
 146 addpwent(struct passwd * pwd)
 147 {
 148         return pw_update(pwd, pwd->pw_name, UPD_CREATE);
 149 }
 150
 151 int
 152 chgpwent(char const * login, struct passwd * pwd)
 153 {
 154         return pw_update(pwd, login, UPD_REPLACE);
 155 }
 156
 157 int
 158 delpwent(struct passwd * pwd)
 159 {
 160         return pw_update(NULL, pwd->pw_name, UPD_DELETE);
 161 }