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 <stdio.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36 #include <sys/param.h>
  37
  38 #include "pwupd.h"
  39
  40 static FILE * pwd_fp = NULL;
  41
  42 void
  43 vendpwent(void)
  44 {
  45         if (pwd_fp != NULL) {
  46                 fclose(pwd_fp);
  47                 pwd_fp = NULL;
  48         }
  49 }
  50
  51 void
  52 vsetpwent(void)
  53 {
  54         vendpwent();
  55 }
  56
  57 static struct passwd *
  58 vnextpwent(char const * nam, uid_t uid, int doclose)
  59 {
  60         struct passwd * pw = NULL;
  61         static char pwtmp[1024];
  62
  63         strlcpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof(pwtmp));
  64
  65         if (pwd_fp != NULL || (pwd_fp = fopen(pwtmp, "r")) != NULL) {
  66                 int done = 0;
  67
  68                 static struct passwd pwd;
  69
  70                 while (!done && fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL)
  71                 {
  72                         int i, quickout = 0;
  73                         char * q;
  74                         char * p = strchr(pwtmp, '\n');
  75
  76                         if (p == NULL) {
  77                                 while (fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL && strchr(pwtmp, '\n')==NULL)
  78                                         ; /* Skip long lines */
  79                                 continue;
  80                         }
  81
  82                         /* skip comments & empty lines */
  83                         if (*pwtmp =='\n' || *pwtmp == '#')
  84                                 continue;
  85
  86                         i = 0;
  87                         q = p = pwtmp;
  88                         bzero(&pwd, sizeof pwd);
  89                         while (!quickout && (p = strsep(&q, ":\n")) != NULL) {
  90                                 switch (i++)
  91                                 {
  92                                 case 0:   /* username */
  93                                         pwd.pw_name = p;
  94                                         if (nam) {
  95                                                 if (strcmp(nam, p) == 0)
  96                                                         done = 1;
  97                                                 else
  98                                                         quickout = 1;
  99                                         }
 100                                         break;
 101                                 case 1:   /* password */
 102                                         pwd.pw_passwd = p;
 103                                         break;
 104                                 case 2:   /* uid */
 105                                         pwd.pw_uid = atoi(p);
 106                                         if (uid != (uid_t)-1) {
 107                                                 if (uid == pwd.pw_uid)
 108                                                         done = 1;
 109                                                 else
 110                                                         quickout = 1;
 111                                         }
 112                                         break;
 113                                 case 3:   /* gid */
 114                                         pwd.pw_gid = atoi(p);
 115                                         break;
 116                                 case 4:   /* class */
 117                                         if (nam == NULL && uid == (uid_t)-1)
 118                                                 done = 1;
 119                                         pwd.pw_class = p;
 120                                         break;
 121                                 case 5:   /* change */
 122                                         pwd.pw_change = (time_t)atol(p);
 123                                         break;
 124                                 case 6:   /* expire */
 125                                         pwd.pw_expire = (time_t)atol(p);
 126                                         break;
 127                                 case 7:   /* gecos */
 128                                         pwd.pw_gecos = p;
 129                                         break;
 130                                 case 8:   /* directory */
 131                                         pwd.pw_dir = p;
 132                                         break;
 133                                 case 9:   /* shell */
 134                                         pwd.pw_shell = p;
 135                                         break;
 136                                 }
 137                         }
 138                 }
 139                 if (doclose)
 140                         vendpwent();
 141                 if (done && pwd.pw_name) {
 142                         pw = &pwd;
 143
 144                         #define CKNULL(s)   s = s ? s : ""
 145                         CKNULL(pwd.pw_passwd);
 146                         CKNULL(pwd.pw_class);
 147                         CKNULL(pwd.pw_gecos);
 148                         CKNULL(pwd.pw_dir);
 149                         CKNULL(pwd.pw_shell);
 150                 }
 151         }
 152         return pw;
 153 }
 154
 155 struct passwd *
 156 vgetpwent(void)
 157 {
 158   return vnextpwent(NULL, -1, 0);
 159 }
 160
 161 struct passwd *
 162 vgetpwuid(uid_t uid)
 163 {
 164   return vnextpwent(NULL, uid, 1);
 165 }
 166
 167 struct passwd *
 168 vgetpwnam(const char * nam)
 169 {
 170   return vnextpwent(nam, -1, 1);
 171 }
 172
 173
 174 static FILE * grp_fp = NULL;
 175
 176 void
 177 vendgrent(void)
 178 {
 179         if (grp_fp != NULL) {
 180                 fclose(grp_fp);
 181                 grp_fp = NULL;
 182         }
 183 }
 184
 185 RET_SETGRENT
 186 vsetgrent(void)
 187 {
 188         vendgrent();
 189 #if defined(__FreeBSD__)
 190         return 0;
 191 #endif
 192 }
 193
 194 static struct group *
 195 vnextgrent(char const * nam, gid_t gid, int doclose)
 196 {
 197         struct group * gr = NULL;
 198
 199         static char * grtmp = NULL;
 200         static int grlen = 0;
 201         static char ** mems = NULL;
 202         static int memlen = 0;
 203
 204         extendline(&grtmp, &grlen, MAXPATHLEN);
 205         strlcpy(grtmp, getgrpath(_GROUP), MAXPATHLEN);
 206
 207         if (grp_fp != NULL || (grp_fp = fopen(grtmp, "r")) != NULL) {
 208                 int done = 0;
 209
 210                 static struct group grp;
 211
 212                 while (!done && fgets(grtmp, grlen, grp_fp) != NULL)
 213                 {
 214                         int i, quickout = 0;
 215                         int mno = 0;
 216                         char * q, * p;
 217                         const char * sep = ":\n";
 218
 219                         if ((p = strchr(grtmp, '\n')) == NULL) {
 220                                 int l;
 221                                 extendline(&grtmp, &grlen, grlen + PWBUFSZ);
 222                                 l = strlen(grtmp);
 223                                 if (fgets(grtmp + l, grlen - l, grp_fp) == NULL)
 224                                   break;        /* No newline terminator on last line */
 225                         }
 226                         /* Skip comments and empty lines */
 227                         if (*grtmp == '\n' || *grtmp == '#')
 228                                 continue;
 229                         i = 0;
 230                         q = p = grtmp;
 231                         bzero(&grp, sizeof grp);
 232                         extendarray(&mems, &memlen, 200);
 233                         while (!quickout && (p = strsep(&q, sep)) != NULL) {
 234                                 switch (i++)
 235                                 {
 236                                 case 0:   /* groupname */
 237                                         grp.gr_name = p;
 238                                         if (nam) {
 239                                                 if (strcmp(nam, p) == 0)
 240                                                         done = 1;
 241                                                 else
 242                                                         quickout = 1;
 243                                         }
 244                                         break;
 245                                 case 1:   /* password */
 246                                         grp.gr_passwd = p;
 247                                         break;
 248                                 case 2:   /* gid */
 249                                         grp.gr_gid = atoi(p);
 250                                         if (gid != (gid_t)-1) {
 251                                                 if (gid == (gid_t)grp.gr_gid)
 252                                                         done = 1;
 253                                                 else
 254                                                         quickout = 1;
 255                                         } else if (nam == NULL)
 256                                                 done = 1;
 257                                         break;
 258                                 case 3:
 259                                         q = p;
 260                                         sep = ",\n";
 261                                         break;
 262                                 default:
 263                                         if (*p) {
 264                                                 extendarray(&mems, &memlen, mno + 2);
 265                                                 mems[mno++] = p;
 266                                         }
 267                                         break;
 268                                 }
 269                         }
 270                         grp.gr_mem = mems;
 271                         mems[mno] = NULL;
 272                 }
 273                 if (doclose)
 274                         vendgrent();
 275                 if (done && grp.gr_name) {
 276                         gr = &grp;
 277
 278                         CKNULL(grp.gr_passwd);
 279                 }
 280         }
 281         return gr;
 282 }
 283
 284 struct group *
 285 vgetgrent(void)
 286 {
 287   return vnextgrent(NULL, -1, 0);
 288 }
 289
 290
 291 struct group *
 292 vgetgrgid(gid_t gid)
 293 {
 294   return vnextgrent(NULL, gid, 1);
 295 }
 296
 297 struct group *
 298 vgetgrnam(const char * nam)
 299 {
 300   return vnextgrent(nam, -1, 1);
 301 }
 302