libexec/mknetid/mknetid.c

   1 /*
   2  * Copyright (c) 1995, 1996
   3  *      Bill Paul <wpaul@ctr.columbia.edu>.  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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Bill Paul.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * netid map generator program
  33  *
  34  * Written by Bill Paul <wpaul@ctr.columbia.edu>
  35  * Center for Telecommunications Research
  36  * Columbia University, New York City
  37  */
  38
  39 #include <sys/types.h>
  40
  41 #include <rpc/rpc.h>
  42 #include <rpcsvc/yp_prot.h>
  43 #include <rpcsvc/ypclnt.h>
  44
  45 #include <err.h>
  46 #include <grp.h>
  47 #include <netdb.h>
  48 #include <pwd.h>
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52 #include <unistd.h>
  53
  54 #include "hash.h"
  55
  56 #ifndef lint
  57 static const char rcsid[] =
  58   "$FreeBSD$";
  59 #endif /* not lint */
  60
  61 #define LINSIZ 1024
  62 #define OPSYS "unix"
  63
  64 /* Default location of group file. */
  65 char *groupfile = _PATH_GROUP;
  66 /* Default location of master.passwd file. */
  67 char *passfile = _PATH_PASSWD;
  68 /* Default location of hosts file. */
  69 char *hostsfile = _PATH_HOSTS;
  70 /* Default location of netid file */
  71 char *netidfile = "/etc/netid";
  72
  73 /*
  74  * Stored hash table of 'reverse' group member database
  75  * which we will construct.
  76  */
  77 struct member_entry *mtable[TABLESIZE];
  78
  79 /*
  80  * Dupe table: used to keep track of entries so we don't
  81  * print the same thing twice.
  82  */
  83 struct member_entry *dtable[TABLESIZE];
  84
  85 extern struct group *_getgrent(void);
  86 extern int _setgrent(void);
  87 extern void _endgrent(void);
  88
  89 static void
  90 usage(void)
  91 {
  92         fprintf (stderr, "%s\n%s\n",
  93         "usage: mknetid [-q] [-g group_file] [-p passwd_file] [-h hosts_file]",
  94         "               [-n netid_file] [-d domain]");
  95         exit(1);
  96 }
  97
  98 extern FILE *_gr_fp;
  99
 100 int
 101 main(int argc, char *argv[])
 102 {
 103         FILE *gfp, *pfp, *hfp, *nfp;
 104         char readbuf[LINSIZ];
 105         char writebuf[LINSIZ];
 106         struct group *gr;
 107         struct grouplist *glist;
 108         char *domain;
 109         int ch;
 110         gid_t i;
 111         char *ptr, *pidptr, *gidptr, *hptr;
 112         int quiet = 0;
 113
 114         domain = NULL;
 115         while ((ch = getopt(argc, argv, "g:p:h:n:d:q")) != -1) {
 116                 switch(ch) {
 117                 case 'g':
 118                         groupfile = optarg;
 119                         break;
 120                 case 'p':
 121                         passfile = optarg;
 122                         break;
 123                 case 'h':
 124                         hostsfile = optarg;
 125                         break;
 126                 case 'n':
 127                         netidfile = optarg;
 128                         break;
 129                 case 'd':
 130                         domain = optarg;
 131                         break;
 132                 case 'q':
 133                         quiet++;
 134                         break;
 135                 default:
 136                         usage();
 137                         break;
 138                 }
 139         }
 140
 141         if (domain == NULL) {
 142                 if (yp_get_default_domain(&domain))
 143                         errx(1, "no domain name specified and default \
 144 domain not set");
 145         }
 146
 147         if ((gfp = fopen(groupfile, "r")) == NULL) {
 148                 err(1, "%s", groupfile);
 149         }
 150
 151         if ((pfp = fopen(passfile, "r")) == NULL) {
 152                 err(1, "%s", passfile);
 153         }
 154
 155         if ((hfp = fopen(hostsfile, "r")) == NULL) {
 156                 err(1, "%s", hostsfile);
 157         }
 158
 159         if ((nfp = fopen(netidfile, "r")) == NULL) {
 160                 /* netid is optional -- just continue */
 161                 nfp = NULL;
 162         }
 163
 164         _gr_fp = gfp;
 165
 166         /* Load all the group membership info into a hash table. */
 167
 168         _setgrent();
 169         while((gr = _getgrent()) != NULL) {
 170                 while(*gr->gr_mem) {
 171                         mstore(mtable, *gr->gr_mem, gr->gr_gid, 0);
 172                         gr->gr_mem++;
 173                 }
 174         }
 175
 176         fclose(gfp);
 177         _endgrent();
 178
 179         /*
 180          * Now parse the passwd database, spewing out the extra
 181          * group information we just stored if necessary.
 182          */
 183         while(fgets(readbuf, LINSIZ, pfp)) {
 184                 /* Ignore comments: ^[ \t]*# */
 185                 for (ptr = readbuf; *ptr != '\0'; ptr++)
 186                         if (*ptr != ' ' && *ptr != '\t')
 187                                 break;
 188                 if (*ptr == '#' || *ptr == '\0')
 189                         continue;
 190                 if ((ptr = strchr(readbuf, ':')) == NULL) {
 191                         warnx("bad passwd file entry: %s", readbuf);
 192                         continue;
 193                 }
 194                 *ptr = '\0';
 195                 ptr++;
 196                 if ((ptr = strchr(ptr, ':')) == NULL) {
 197                         warnx("bad passwd file entry: %s", readbuf);
 198                         continue;
 199                 }
 200                 *ptr = '\0';
 201                 ptr++;
 202                 pidptr = ptr;
 203                 if ((ptr = strchr(ptr, ':')) == NULL) {
 204                         warnx("bad passwd file entry: %s", readbuf);
 205                         continue;
 206                 }
 207                 *ptr = '\0';
 208                 ptr++;
 209                 gidptr = ptr;
 210                 if ((ptr = strchr(ptr, ':')) == NULL) {
 211                         warnx("bad passwd file entry: %s", readbuf);
 212                         continue;
 213                 }
 214                 *ptr = '\0';
 215                 i = atol(gidptr);
 216
 217                 snprintf(writebuf, sizeof(writebuf), "%s.%s@%s", OPSYS,
 218                                                         pidptr, domain);
 219
 220                 if (lookup(dtable, writebuf)) {
 221                         if (!quiet)
 222                                 warnx("duplicate netid '%s.%s@%s' -- skipping",
 223                                                 OPSYS, pidptr, domain);
 224                         continue;
 225                 } else {
 226                         mstore(dtable, writebuf, 0, 1);
 227                 }
 228                 printf("%s.%s@%s %s:%s", OPSYS, pidptr, domain, pidptr, gidptr);
 229                 if ((glist = lookup(mtable, (char *)&readbuf)) != NULL) {
 230                         while(glist) {
 231                                 if (glist->groupid != i)
 232                                         printf(",%lu", (u_long)glist->groupid);
 233                                 glist = glist->next;
 234                         }
 235                 }
 236                 printf ("\n");
 237         }
 238
 239         fclose(pfp);
 240
 241         /*
 242          * Now parse the hosts database (this part sucks).
 243          */
 244
 245         while ((ptr = fgets(readbuf, LINSIZ, hfp))) {
 246                 if (*ptr == '#')
 247                         continue;
 248                 if (!(hptr = strpbrk(ptr, "#\n")))
 249                         continue;
 250                 *hptr = '\0';
 251                 if (!(hptr = strpbrk(ptr, " \t")))
 252                         continue;
 253                 *hptr++ = '\0';
 254                 ptr = hptr;
 255                 while (*ptr == ' ' || *ptr == '\t')
 256                         ptr++;
 257                 if (!(hptr = strpbrk(ptr, " \t")))
 258                         continue;
 259                 *hptr++ = '\0';
 260                 snprintf(writebuf, sizeof(writebuf), "%s.%s@%s", OPSYS,
 261                                                                 ptr, domain);
 262                 if (lookup(dtable, (char *)&writebuf)) {
 263                         if (!quiet)
 264                                 warnx("duplicate netid '%s' -- skipping",
 265                                                                 writebuf);
 266                         continue;
 267                 } else {
 268                         mstore(dtable, (char *)&writebuf, 0, 1);
 269                 }
 270                 printf ("%s.%s@%s 0:%s\n", OPSYS, ptr, domain, ptr);
 271         }
 272
 273         fclose(hfp);
 274
 275         /*
 276          * Lastly, copy out any extra information in the netid
 277          * file. If it's not open, just ignore it: it's optional anyway.
 278          */
 279
 280         if (nfp != NULL) {
 281                 while(fgets(readbuf, LINSIZ, nfp)) {
 282                         if (readbuf[0] == '#')
 283                                 continue;
 284                         if ((ptr = strpbrk((char*)&readbuf, " \t")) == NULL) {
 285                                 warnx("bad netid entry: '%s'", readbuf);
 286                                 continue;
 287                         }
 288
 289                         writebuf[0] = *ptr;
 290                         *ptr = '\0';
 291                         if (lookup(dtable, (char *)&readbuf)) {
 292                                 if (!quiet)
 293                                         warnx("duplicate netid '%s' -- skipping",
 294                                                                 readbuf);
 295                                 continue;
 296                         } else {
 297                                 mstore(dtable, (char *)&readbuf, 0, 1);
 298                         }
 299                         *ptr = writebuf[0];
 300                         printf("%s",readbuf);
 301                 }
 302                 fclose(nfp);
 303         }
 304
 305         exit(0);
 306 }