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  */
  27
  28 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <err.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <uuid.h>
  36
  37 static void
  38 usage(void)
  39 {
  40         (void)fprintf(stderr, "usage: uuidgen [-1] [-n count] [-o filename]\n");
  41         exit(1);
  42 }
  43
  44 int
  45 main(int argc, char *argv[])
  46 {
  47         FILE *fp;
  48         uuid_t *store, *uuid;
  49         char *p;
  50         int ch, count, i, iterate;
  51
  52         count = -1;     /* no count yet */
  53         fp = stdout;    /* default output file */
  54         iterate = 0;    /* not one at a time */
  55         while ((ch = getopt(argc, argv, "1n:o:")) != -1)
  56                 switch (ch) {
  57                 case '1':
  58                         iterate = 1;
  59                         break;
  60                 case 'n':
  61                         if (count > 0)
  62                                 usage();
  63                         count = strtol(optarg, &p, 10);
  64                         if (*p != 0 || count < 1)
  65                                 usage();
  66                         break;
  67                 case 'o':
  68                         if (fp != stdout)
  69                                 errx(1, "multiple output files not allowed");
  70                         fp = fopen(optarg, "w");
  71                         if (fp == NULL)
  72                                 err(1, "fopen");
  73                         break;
  74                 default:
  75                         usage();
  76                 }
  77         argv += optind;
  78         argc -= optind;
  79
  80         if (argc)
  81                 usage();
  82
  83         if (count == -1)
  84                 count = 1;
  85
  86         store = (uuid_t*)malloc(sizeof(uuid_t) * count);
  87         if (store == NULL)
  88                 err(1, "malloc()");
  89
  90         if (!iterate) {
  91                 /* Get them all in a single batch */
  92                 if (uuidgen(store, count) != 0)
  93                         err(1, "uuidgen()");
  94         } else {
  95                 uuid = store;
  96                 for (i = 0; i < count; i++) {
  97                         if (uuidgen(uuid++, 1) != 0)
  98                                 err(1, "uuidgen()");
  99                 }
 100         }
 101
 102         uuid = store;
 103         while (count--) {
 104                 uuid_to_string(uuid++, &p, NULL);
 105                 fprintf(fp, "%s\n", p);
 106                 free(p);
 107         }
 108
 109         free(store);
 110         if (fp != stdout)
 111                 fclose(fp);
 112         return (0);
 113 }