pw/pw_vpw.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
  28 #ifndef lint
  29 static const char rcsid[] =
  30   "$FreeBSD$";
  31 #endif /* not lint */
  32
  33 #include <pwd.h>
  34 #include <grp.h>
  35 #include <libutil.h>
  36 #define _WITH_GETLINE
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <stdlib.h>
  40 #include <sys/param.h>
  41
  42 #include "pwupd.h"
  43
  44 static FILE * pwd_fp = NULL;
  45
  46 void
  47 vendpwent(void)
  48 {
  49         if (pwd_fp != NULL) {
  50                 fclose(pwd_fp);
  51                 pwd_fp = NULL;
  52         }
  53 }
  54
  55 void
  56 vsetpwent(void)
  57 {
  58         vendpwent();
  59 }
  60
  61 static struct passwd *
  62 vnextpwent(char const *nam, uid_t uid, int doclose)
  63 {
  64         struct passwd *pw;
  65         char *line;
  66         size_t linecap;
  67         ssize_t linelen;
  68
  69         pw = NULL;
  70         line = NULL;
  71         linecap = 0;
  72         linelen = 0;
  73
  74         if (pwd_fp != NULL || (pwd_fp = fopen(getpwpath(_MASTERPASSWD), "r")) != NULL) {
  75                 while ((linelen = getline(&line, &linecap, pwd_fp)) > 0) {
  76                         /* Skip comments and empty lines */
  77                         if (*line == '\n' || *line == '#')
  78                                 continue;
  79                         /* trim latest \n */
  80                         if (line[linelen - 1 ] == '\n')
  81                                 line[linelen - 1] = '\0';
  82                         pw = pw_scan(line, PWSCAN_MASTER);
  83                         if (uid != (uid_t)-1) {
  84                                 if (uid == pw->pw_uid)
  85                                         break;
  86                         } else if (nam != NULL) {
  87                                 if (strcmp(nam, pw->pw_name) == 0)
  88                                         break;
  89                         } else
  90                                 break;
  91                         free(pw);
  92                         pw = NULL;
  93                 }
  94                 if (doclose)
  95                         vendpwent();
  96         }
  97         free(line);
  98
  99         return (pw);
 100 }
 101
 102 struct passwd *
 103 vgetpwent(void)
 104 {
 105   return vnextpwent(NULL, -1, 0);
 106 }
 107
 108 struct passwd *
 109 vgetpwuid(uid_t uid)
 110 {
 111   return vnextpwent(NULL, uid, 1);
 112 }
 113
 114 struct passwd *
 115 vgetpwnam(const char * nam)
 116 {
 117   return vnextpwent(nam, -1, 1);
 118 }
 119
 120
 121 static FILE * grp_fp = NULL;
 122
 123 void
 124 vendgrent(void)
 125 {
 126         if (grp_fp != NULL) {
 127                 fclose(grp_fp);
 128                 grp_fp = NULL;
 129         }
 130 }
 131
 132 RET_SETGRENT
 133 vsetgrent(void)
 134 {
 135         vendgrent();
 136 #if defined(__FreeBSD__)
 137         return 0;
 138 #endif
 139 }
 140
 141 static struct group *
 142 vnextgrent(char const *nam, gid_t gid, int doclose)
 143 {
 144         struct group *gr;
 145         char *line;
 146         size_t linecap;
 147         ssize_t linelen;
 148
 149         gr = NULL;
 150         line = NULL;
 151         linecap = 0;
 152         linelen = 0;
 153
 154         if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) {
 155                 while ((linelen = getline(&line, &linecap, grp_fp)) > 0) {
 156                         /* Skip comments and empty lines */
 157                         if (*line == '\n' || *line == '#')
 158                                 continue;
 159                         /* trim latest \n */
 160                         if (line[linelen - 1 ] == '\n')
 161                                 line[linelen - 1] = '\0';
 162                         gr = gr_scan(line);
 163                         if (gid != (gid_t)-1) {
 164                                 if (gid == gr->gr_gid)
 165                                         break;
 166                         } else if (nam != NULL) {
 167                                 if (strcmp(nam, gr->gr_name) == 0)
 168                                         break;
 169                         } else
 170                                 break;
 171                         free(gr);
 172                         gr = NULL;
 173                 }
 174                 if (doclose)
 175                         vendgrent();
 176         }
 177         free(line);
 178
 179         return (gr);
 180 }
 181
 182 struct group *
 183 vgetgrent(void)
 184 {
 185   return vnextgrent(NULL, -1, 0);
 186 }
 187
 188
 189 struct group *
 190 vgetgrgid(gid_t gid)
 191 {
 192   return vnextgrent(NULL, gid, 1);
 193 }
 194
 195 struct group *
 196 vgetgrnam(const char * nam)
 197 {
 198   return vnextgrent(nam, -1, 1);
 199 }
 200