bin/uuidgen/uuidgen.c

   1 /*
   2  * Copyright (c) 2002 Marcel Moolenaar
   3  * 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  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/usr.bin/uuidgen/uuidgen.c,v 1.3 2003/03/15 02:27:10 marcel Exp $
  27  */
  28
  29 #include <err.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <uuid.h>
  34
  35 static void
  36 usage(void)
  37 {
  38         (void)fprintf(stderr, "usage: uuidgen [-1] [-n count] [-o filename]\n");
  39         exit(1);
  40 }
  41
  42 int
  43 main(int argc, char *argv[])
  44 {
  45         FILE *fp;
  46         uuid_t *store, *uuid;
  47         char *p;
  48         int ch, count, i, iterate;
  49
  50         count = -1;     /* no count yet */
  51         fp = stdout;    /* default output file */
  52         iterate = 0;    /* not one at a time */
  53         while ((ch = getopt(argc, argv, "1n:o:")) != -1)
  54                 switch (ch) {
  55                 case '1':
  56                         iterate = 1;
  57                         break;
  58                 case 'n':
  59                         if (count > 0)
  60                                 usage();
  61                         count = strtol(optarg, &p, 10);
  62                         if (*p != 0 || count < 1)
  63                                 usage();
  64                         break;
  65                 case 'o':
  66                         if (fp != stdout)
  67                                 errx(1, "multiple output files not allowed");
  68                         fp = fopen(optarg, "w");
  69                         if (fp == NULL)
  70                                 err(1, "fopen");
  71                         break;
  72                 default:
  73                         usage();
  74                 }
  75         argv += optind;
  76         argc -= optind;
  77
  78         if (argc)
  79                 usage();
  80
  81         if (count == -1)
  82                 count = 1;
  83
  84         store = (uuid_t*)malloc(sizeof(uuid_t) * count);
  85         if (store == NULL)
  86                 err(1, "malloc()");
  87
  88         if (!iterate) {
  89                 /* Get them all in a single batch */
  90                 if (uuidgen(store, count) != 0)
  91                         err(1, "uuidgen()");
  92         } else {
  93                 uuid = store;
  94                 for (i = 0; i < count; i++) {
  95                         if (uuidgen(uuid++, 1) != 0)
  96                                 err(1, "uuidgen()");
  97                 }
  98         }
  99
 100         uuid = store;
 101         while (count--) {
 102                 uuid_to_string(uuid++, &p, NULL);
 103                 fprintf(fp, "%s\n", p);
 104                 free(p);
 105         }
 106
 107         free(store);
 108         if (fp != stdout)
 109                 fclose(fp);
 110         return (0);
 111 }