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
  27 #ifndef lint
  28 static const char rcsid[] =
  29   "$FreeBSD$";
  30 #endif /* not lint */
  31
  32 #include <sys/wait.h>
  33
  34 #include <err.h>
  35 #include <errno.h>
  36 #include <pwd.h>
  37 #include <libutil.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #include "pwupd.h"
  44
  45 char *
  46 getpwpath(char const * file)
  47 {
  48         static char pathbuf[MAXPATHLEN];
  49
  50         snprintf(pathbuf, sizeof pathbuf, "%s/%s", conf.etcpath, file);
  51
  52         return (pathbuf);
  53 }
  54
  55 static int
  56 pwdb_check(void)
  57 {
  58         int             i = 0;
  59         pid_t           pid;
  60         char           *args[10];
  61
  62         args[i++] = _PATH_PWD_MKDB;
  63         args[i++] = "-C";
  64
  65         if (strcmp(conf.etcpath, _PATH_PWD) != 0) {
  66                 args[i++] = "-d";
  67                 args[i++] = conf.etcpath;
  68         }
  69         args[i++] = getpwpath(_MASTERPASSWD);
  70         args[i] = NULL;
  71
  72         if ((pid = fork()) == -1)       /* Error (errno set) */
  73                 i = errno;
  74         else if (pid == 0) {    /* Child */
  75                 execv(args[0], args);
  76                 _exit(1);
  77         } else {                /* Parent */
  78                 waitpid(pid, &i, 0);
  79                 if (WEXITSTATUS(i))
  80                         i = EIO;
  81         }
  82
  83         return (i);
  84 }
  85
  86 static int
  87 pw_update(struct passwd * pwd, char const * user)
  88 {
  89         struct passwd   *pw = NULL;
  90         struct passwd   *old_pw = NULL;
  91         int              rc, pfd, tfd;
  92
  93         if ((rc = pwdb_check()) != 0)
  94                 return (rc);
  95
  96         if (pwd != NULL)
  97                 pw = pw_dup(pwd);
  98
  99         if (user != NULL)
 100                 old_pw = GETPWNAM(user);
 101
 102         if (pw_init(conf.etcpath, NULL))
 103                 err(1, "pw_init()");
 104         if ((pfd = pw_lock()) == -1) {
 105                 pw_fini();
 106                 err(1, "pw_lock()");
 107         }
 108         if ((tfd = pw_tmp(-1)) == -1) {
 109                 pw_fini();
 110                 err(1, "pw_tmp()");
 111         }
 112         if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
 113                 pw_fini();
 114                 err(1, "pw_copy()");
 115         }
 116         /*
 117          * in case of deletion of a user, the whole database
 118          * needs to be regenerated
 119          */
 120         if (pw_mkdb(pw != NULL ? pw->pw_name : NULL) == -1) {
 121                 pw_fini();
 122                 err(1, "pw_mkdb()");
 123         }
 124         free(pw);
 125         pw_fini();
 126
 127         return (0);
 128 }
 129
 130 int
 131 addpwent(struct passwd * pwd)
 132 {
 133
 134         return (pw_update(pwd, NULL));
 135 }
 136
 137 int
 138 chgpwent(char const * login, struct passwd * pwd)
 139 {
 140
 141         return (pw_update(pwd, login));
 142 }
 143
 144 int
 145 delpwent(struct passwd * pwd)
 146 {
 147
 148         return (pw_update(NULL, pwd->pw_name));
 149 }