usr.sbin/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  * $FreeBSD: src/usr.sbin/pw/pw_vpw.c,v 1.3 2000/01/15 00:20:21 davidn Exp $
  27  * $DragonFly: src/usr.sbin/pw/pw_vpw.c,v 1.4 2005/12/05 02:40:27 swildner Exp $
  28  */
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <sys/param.h>
  34
  35 #include "pwupd.h"
  36
  37 static FILE * pwd_fp = NULL;
  38
  39 void
  40 vendpwent(void)
  41 {
  42         if (pwd_fp != NULL) {
  43                 fclose(pwd_fp);
  44                 pwd_fp = NULL;
  45         }
  46 }
  47
  48 void
  49 vsetpwent(void)
  50 {
  51         vendpwent();
  52 }
  53
  54 static struct passwd *
  55 vnextpwent(char const * nam, uid_t uid, int doclose)
  56 {
  57         struct passwd * pw = NULL;
  58         static char pwtmp[1024];
  59
  60         strncpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof pwtmp);
  61         pwtmp[sizeof pwtmp - 1] = '\0';
  62
  63         if (pwd_fp != NULL || (pwd_fp = fopen(pwtmp, "r")) != NULL) {
  64                 int done = 0;
  65
  66                 static struct passwd pwd;
  67
  68                 while (!done && fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL)
  69                 {
  70                         int i, quickout = 0;
  71                         char * q;
  72                         char * p = strchr(pwtmp, '\n');
  73
  74                         if (p == NULL) {
  75                                 while (fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL && strchr(pwtmp, '\n')==NULL)
  76                                         ; /* Skip long lines */
  77                                 continue;
  78                         }
  79
  80                         /* skip comments & empty lines */
  81                         if (*pwtmp =='\n' || *pwtmp == '#')
  82                                 continue;
  83
  84                         i = 0;
  85                         q = p = pwtmp;
  86                         bzero(&pwd, sizeof pwd);
  87                         while (!quickout && (p = strsep(&q, ":\n")) != NULL) {
  88                                 switch (i++)
  89                                 {
  90                                 case 0:   /* username */
  91                                         pwd.pw_name = p;
  92                                         if (nam) {
  93                                                 if (strcmp(nam, p) == 0)
  94                                                         done = 1;
  95                                                 else
  96                                                         quickout = 1;
  97                                         }
  98                                         break;
  99                                 case 1:   /* password */
 100                                         pwd.pw_passwd = p;
 101                                         break;
 102                                 case 2:   /* uid */
 103                                         pwd.pw_uid = atoi(p);
 104                                         if (uid != (uid_t)-1) {
 105                                                 if (uid == pwd.pw_uid)
 106                                                         done = 1;
 107                                                 else
 108                                                         quickout = 1;
 109                                         }
 110                                         break;
 111                                 case 3:   /* gid */
 112                                         pwd.pw_gid = atoi(p);
 113                                         break;
 114                                 case 4:   /* class */
 115                                         if (nam == NULL && uid == (uid_t)-1)
 116                                                 done = 1;
 117                                         pwd.pw_class = p;
 118                                         break;
 119                                 case 5:   /* change */
 120                                         pwd.pw_change = (time_t)atol(p);
 121                                         break;
 122                                 case 6:   /* expire */
 123                                         pwd.pw_expire = (time_t)atol(p);
 124                                         break;
 125                                 case 7:   /* gecos */
 126                                         pwd.pw_gecos = p;
 127                                         break;
 128                                 case 8:   /* directory */
 129                                         pwd.pw_dir = p;
 130                                         break;
 131                                 case 9:   /* shell */
 132                                         pwd.pw_shell = p;
 133                                         break;
 134                                 }
 135                         }
 136                 }
 137                 if (doclose)
 138                         vendpwent();
 139                 if (done && pwd.pw_name) {
 140                         pw = &pwd;
 141
 142                         #define CKNULL(s)   s = s ? s : ""
 143                         CKNULL(pwd.pw_passwd);
 144                         CKNULL(pwd.pw_class);
 145                         CKNULL(pwd.pw_gecos);
 146                         CKNULL(pwd.pw_dir);
 147                         CKNULL(pwd.pw_shell);
 148                 }
 149         }
 150         return pw;
 151 }
 152
 153 struct passwd *
 154 vgetpwent(void)
 155 {
 156   return vnextpwent(NULL, -1, 0);
 157 }
 158
 159 struct passwd *
 160 vgetpwuid(uid_t uid)
 161 {
 162   return vnextpwent(NULL, uid, 1);
 163 }
 164
 165 struct passwd *
 166 vgetpwnam(const char * nam)
 167 {
 168   return vnextpwent(nam, -1, 1);
 169 }
 170
 171 int
 172 vpwdb(char *arg, ...)
 173 {
 174   arg=arg;
 175   return 0;
 176 }
 177
 178
 179
 180 static FILE * grp_fp = NULL;
 181
 182 void
 183 vendgrent(void)
 184 {
 185         if (grp_fp != NULL) {
 186                 fclose(grp_fp);
 187                 grp_fp = NULL;
 188         }
 189 }
 190
 191 RET_SETGRENT
 192 vsetgrent(void)
 193 {
 194         vendgrent();
 195 #if defined(__DragonFly__)
 196         return 0;
 197 #endif
 198 }
 199
 200 static struct group *
 201 vnextgrent(char const * nam, gid_t gid, int doclose)
 202 {
 203         struct group * gr = NULL;
 204
 205         static char * grtmp = NULL;
 206         static int grlen = 0;
 207         static char ** mems = NULL;
 208         static int memlen = 0;
 209
 210         extendline(&grtmp, &grlen, MAXPATHLEN);
 211         strncpy(grtmp, getgrpath(_GROUP), MAXPATHLEN);
 212         grtmp[MAXPATHLEN - 1] = '\0';
 213
 214         if (grp_fp != NULL || (grp_fp = fopen(grtmp, "r")) != NULL) {
 215                 int done = 0;
 216
 217                 static struct group grp;
 218
 219                 while (!done && fgets(grtmp, grlen, grp_fp) != NULL)
 220                 {
 221                         int i, quickout = 0;
 222                         int mno = 0;
 223                         char * q, * p;
 224                         char * sep = ":\n";
 225
 226                         if ((p = strchr(grtmp, '\n')) == NULL) {
 227                                 int l;
 228                                 extendline(&grtmp, &grlen, grlen + PWBUFSZ);
 229                                 l = strlen(grtmp);
 230                                 if (fgets(grtmp + l, grlen - l, grp_fp) == NULL)
 231                                   break;        /* No newline terminator on last line */
 232                         }
 233                         /* Skip comments and empty lines */
 234                         if (*grtmp == '\n' || *grtmp == '#')
 235                                 continue;
 236                         i = 0;
 237                         q = p = grtmp;
 238                         bzero(&grp, sizeof grp);
 239                         extendarray(&mems, &memlen, 200);
 240                         while (!quickout && (p = strsep(&q, sep)) != NULL) {
 241                                 switch (i++)
 242                                 {
 243                                 case 0:   /* groupname */
 244                                         grp.gr_name = p;
 245                                         if (nam) {
 246                                                 if (strcmp(nam, p) == 0)
 247                                                         done = 1;
 248                                                 else
 249                                                         quickout = 1;
 250                                         }
 251                                         break;
 252                                 case 1:   /* password */
 253                                         grp.gr_passwd = p;
 254                                         break;
 255                                 case 2:   /* gid */
 256                                         grp.gr_gid = atoi(p);
 257                                         if (gid != (gid_t)-1) {
 258                                                 if (gid == (gid_t)grp.gr_gid)
 259                                                         done = 1;
 260                                                 else
 261                                                         quickout = 1;
 262                                         } else if (nam == NULL)
 263                                                 done = 1;
 264                                         break;
 265                                 case 3:
 266                                         q = p;
 267                                         sep = ",\n";
 268                                         break;
 269                                 default:
 270                                         if (*p) {
 271                                                 extendarray(&mems, &memlen, mno + 2);
 272                                                 mems[mno++] = p;
 273                                         }
 274                                         break;
 275                                 }
 276                         }
 277                         grp.gr_mem = mems;
 278                         mems[mno] = NULL;
 279                 }
 280                 if (doclose)
 281                         vendgrent();
 282                 if (done && grp.gr_name) {
 283                         gr = &grp;
 284
 285                         CKNULL(grp.gr_passwd);
 286                 }
 287         }
 288         return gr;
 289 }
 290
 291 struct group *
 292 vgetgrent(void)
 293 {
 294   return vnextgrent(NULL, -1, 0);
 295 }
 296
 297
 298 struct group *
 299 vgetgrgid(gid_t gid)
 300 {
 301   return vnextgrent(NULL, gid, 1);
 302 }
 303
 304 struct group *
 305 vgetgrnam(const char * nam)
 306 {
 307   return vnextgrent(nam, -1, 1);
 308 }
 309
 310 int
 311 vgrdb(char *arg, ...)
 312 {
 313   arg=arg;
 314   return 0;
 315 }
 316