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 <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
  48 #define HAVE_PWDB_C     1
  49 #define HAVE_PWDB_U     1
  50
  51 static char pathpwd[] = _PATH_PWD;
  52 static char * pwpath = pathpwd;
  53
  54 int
  55 setpwdir(const char * dir)
  56 {
  57         if (dir == NULL)
  58                 return -1;
  59         else {
  60                 char * d = malloc(strlen(dir)+1);
  61                 if (d == NULL)
  62                         return -1;
  63                 pwpath = strcpy(d, dir);
  64         }
  65         return 0;
  66 }
  67
  68 char *
  69 getpwpath(char const * file)
  70 {
  71         static char pathbuf[MAXPATHLEN];
  72
  73         snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
  74         return pathbuf;
  75 }
  76
  77 static int
  78 pwdb(char *arg,...)
  79 {
  80         int             i = 0;
  81         pid_t           pid;
  82         va_list         ap;
  83         char           *args[10];
  84
  85         args[i++] = _PATH_PWD_MKDB;
  86         va_start(ap, arg);
  87         while (i < 6 && arg != NULL) {
  88                 args[i++] = arg;
  89                 arg = va_arg(ap, char *);
  90         }
  91         if (pwpath != pathpwd) {
  92                 args[i++] = "-d";
  93                 args[i++] = pwpath;
  94         }
  95         args[i++] = getpwpath(_MASTERPASSWD);
  96         args[i] = NULL;
  97
  98         if ((pid = fork()) == -1)       /* Error (errno set) */
  99                 i = errno;
 100         else if (pid == 0) {    /* Child */
 101                 execv(args[0], args);
 102                 _exit(1);
 103         } else {                /* Parent */
 104                 waitpid(pid, &i, 0);
 105                 if (WEXITSTATUS(i))
 106                         i = EIO;
 107         }
 108         va_end(ap);
 109         return i;
 110 }
 111
 112 static int
 113 pw_update(struct passwd * pwd, char const * user)
 114 {
 115         int             rc = 0;
 116
 117         /*
 118          * First, let's check the see if the database is alright
 119          * Note: -C is only available in FreeBSD 2.2 and above
 120          */
 121 #ifdef HAVE_PWDB_C
 122         rc = pwdb("-C", (char *)NULL);  /* Check only */
 123         if (rc == 0) {
 124 #else
 125         {                               /* No -C */
 126 #endif
 127                 int pfd, tfd;
 128                 struct passwd *pw = NULL;
 129                 struct passwd *old_pw = NULL;
 130
 131                 if (pwd != NULL)
 132                        pw = pw_dup(pwd);
 133
 134                 if (user != NULL)
 135                         old_pw = GETPWNAM(user);
 136
 137                 if (pw_init(pwpath, NULL))
 138                         err(1, "pw_init()");
 139                 if ((pfd = pw_lock()) == -1) {
 140                         pw_fini();
 141                         err(1, "pw_lock()");
 142                 }
 143                 if ((tfd = pw_tmp(-1)) == -1) {
 144                         pw_fini();
 145                         err(1, "pw_tmp()");
 146                 }
 147                 if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
 148                         pw_fini();
 149                         err(1, "pw_copy()");
 150                 }
 151                 if (pw_mkdb(user) == -1) {
 152                         pw_fini();
 153                         err(1, "pw_mkdb()");
 154                 }
 155                 free(pw);
 156                 pw_fini();
 157         }
 158         return 0;
 159 }
 160
 161 int
 162 addpwent(struct passwd * pwd)
 163 {
 164         return pw_update(pwd, NULL);
 165 }
 166
 167 int
 168 chgpwent(char const * login, struct passwd * pwd)
 169 {
 170         return pw_update(pwd, login);
 171 }
 172
 173 int
 174 delpwent(struct passwd * pwd)
 175 {
 176         char login[MAXLOGNAME];
 177
 178         strlcpy(login, pwd->pw_name, MAXLOGNAME);
 179         return pw_update(NULL, login);
 180 }