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 <sys/capsicum.h>
32
33#include <capsicum_helpers.h>
34#include <err.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <unistd.h>
38#include <uuid.h>
39
40static void
41usage(void)
42{
43	(void)fprintf(stderr, "usage: uuidgen [-1] [-n count] [-o filename]\n");
44	exit(1);
45}
46
47int
48main(int argc, char *argv[])
49{
50	FILE *fp;
51	uuid_t *store, *uuid;
52	char *p;
53	int ch, count, i, iterate, status;
54
55	count = -1;	/* no count yet */
56	fp = stdout;	/* default output file */
57	iterate = 0;	/* not one at a time */
58	while ((ch = getopt(argc, argv, "1n:o:")) != -1)
59		switch (ch) {
60		case '1':
61			iterate = 1;
62			break;
63		case 'n':
64			if (count > 0)
65				usage();
66			count = strtol(optarg, &p, 10);
67			if (*p != 0 || count < 1)
68				usage();
69			break;
70		case 'o':
71			if (fp != stdout)
72				errx(1, "multiple output files not allowed");
73			fp = fopen(optarg, "w");
74			if (fp == NULL)
75				err(1, "fopen");
76			break;
77		default:
78			usage();
79		}
80	argv += optind;
81	argc -= optind;
82
83	if (argc)
84		usage();
85
86	caph_cache_catpages();
87	if (caph_limit_stdio() < 0)
88		err(1, "Unable to limit stdio");
89	if (caph_enter() < 0)
90		err(1, "Unable to enter capability mode");
91
92	if (count == -1)
93		count = 1;
94
95	store = (uuid_t*)malloc(sizeof(uuid_t) * count);
96	if (store == NULL)
97		err(1, "malloc()");
98
99	if (!iterate) {
100		/* Get them all in a single batch */
101		if (uuidgen(store, count) != 0)
102			err(1, "uuidgen()");
103	} else {
104		uuid = store;
105		for (i = 0; i < count; i++) {
106			if (uuidgen(uuid++, 1) != 0)
107				err(1, "uuidgen()");
108		}
109	}
110
111	uuid = store;
112	while (count--) {
113		uuid_to_string(uuid++, &p, &status);
114		if (status != uuid_s_ok)
115		     err(1, "cannot stringify a UUID");
116		fprintf(fp, "%s\n", p);
117		free(p);
118	}
119
120	free(store);
121	if (fp != stdout)
122		fclose(fp);
123	return (0);
124}
125