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 <errno.h>
  38 #include <sys/types.h>
  39 #include <sys/stat.h>
  40 #include <sys/param.h>
  41 #include <sys/wait.h>
  42
  43 #include "pwupd.h"
  44
  45 #define HAVE_PWDB_C     1
  46
  47 static char pathpwd[] = _PATH_PWD;
  48 static char * pwpath = pathpwd;
  49
  50 int
  51 setpwdir(const char * dir)
  52 {
  53         if (dir == NULL)
  54                 return -1;
  55         else {
  56                 char * d = malloc(strlen(dir)+1);
  57                 if (d == NULL)
  58                         return -1;
  59                 pwpath = strcpy(d, dir);
  60         }
  61         return 0;
  62 }
  63
  64 char *
  65 getpwpath(char const * file)
  66 {
  67         static char pathbuf[MAXPATHLEN];
  68
  69         snprintf(pathbuf, sizeof pathbuf, "%s/%s", pwpath, file);
  70         return pathbuf;
  71 }
  72
  73 int
  74 pwdb(char *arg,...)
  75 {
  76         int             i = 0;
  77         pid_t           pid;
  78         va_list         ap;
  79         char           *args[10];
  80
  81         args[i++] = _PATH_PWD_MKDB;
  82         va_start(ap, arg);
  83         while (i < 6 && arg != NULL) {
  84                 args[i++] = arg;
  85                 arg = va_arg(ap, char *);
  86         }
  87         if (pwpath != pathpwd) {
  88                 args[i++] = "-d";
  89                 args[i++] = pwpath;
  90         }
  91         args[i++] = getpwpath(_MASTERPASSWD);
  92         args[i] = NULL;
  93
  94         if ((pid = fork()) == -1)       /* Error (errno set) */
  95                 i = errno;
  96         else if (pid == 0) {    /* Child */
  97                 execv(args[0], args);
  98                 _exit(1);
  99         } else {                /* Parent */
 100                 waitpid(pid, &i, 0);
 101                 if (WEXITSTATUS(i))
 102                         i = EIO;
 103         }
 104         return i;
 105 }
 106
 107 int
 108 fmtpwentry(char *buf, struct passwd * pwd, int type)
 109 {
 110         int             l;
 111         char           *pw;
 112
 113         pw = (pwd->pw_passwd == NULL || !*pwd->pw_passwd) ? "" : (type == PWF_MASTER) ? pwd->pw_passwd : "*";
 114
 115         if (type == PWF_PASSWD)
 116                 l = sprintf(buf, "%s:*:%ld:%ld:%s:%s:%s\n",
 117                        pwd->pw_name, (long) pwd->pw_uid, (long) pwd->pw_gid,
 118                             pwd->pw_gecos ? pwd->pw_gecos : "User &",
 119                             pwd->pw_dir, pwd->pw_shell);
 120         else
 121                 l = sprintf(buf, "%s:%s:%ld:%ld:%s:%lu:%lu:%s:%s:%s\n",
 122                    pwd->pw_name, pw, (long) pwd->pw_uid, (long) pwd->pw_gid,
 123                             pwd->pw_class ? pwd->pw_class : "",
 124                             (unsigned long) pwd->pw_change,
 125                             (unsigned long) pwd->pw_expire,
 126                             pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 127         return l;
 128 }
 129
 130
 131 int
 132 fmtpwent(char *buf, struct passwd * pwd)
 133 {
 134         return fmtpwentry(buf, pwd, PWF_STANDARD);
 135 }
 136
 137 static int
 138 pw_update(struct passwd * pwd, char const * user, int mode)
 139 {
 140         int             rc = 0;
 141
 142         ENDPWENT();
 143
 144         /*
 145          * First, let's check the see if the database is alright
 146          * Note: -C is only available in FreeBSD 2.2 and above
 147          */
 148 #ifdef HAVE_PWDB_C
 149         if (pwdb("-C", NULL) == 0) {    /* Check only */
 150 #else
 151         {                               /* No -C */
 152 #endif
 153                 char            pfx[32];
 154                 char            pwbuf[PWBUFSZ];
 155                 int             l = sprintf(pfx, "%s:", user);
 156
 157                 /*
 158                  * Update the passwd file first
 159                  */
 160                 if (pwd == NULL)
 161                         *pwbuf = '\0';
 162                 else
 163                         fmtpwentry(pwbuf, pwd, PWF_PASSWD);
 164
 165                 rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode);
 166                 if (rc == 0) {
 167
 168                         /*
 169                          * Then the master.passwd file
 170                          */
 171                         if (pwd != NULL)
 172                                 fmtpwentry(pwbuf, pwd, PWF_MASTER);
 173                         rc = fileupdate(getpwpath(_MASTERPASSWD), 0644, pwbuf, pfx, l, mode);
 174                         if (rc == 0) {
 175                                 if (mode == UPD_DELETE)
 176                                         rc = pwdb(NULL);
 177                                 else
 178                                         rc = pwdb("-u", pwd->pw_name, NULL);
 179                         }
 180                 }
 181         }
 182         return rc;
 183 }
 184
 185 int
 186 addpwent(struct passwd * pwd)
 187 {
 188         return pw_update(pwd, pwd->pw_name, UPD_CREATE);
 189 }
 190
 191 int
 192 chgpwent(char const * login, struct passwd * pwd)
 193 {
 194         return pw_update(pwd, login, UPD_REPLACE);
 195 }
 196
 197 int
 198 delpwent(struct passwd * pwd)
 199 {
 200         return pw_update(NULL, pwd->pw_name, UPD_DELETE);
 201 }