1 /*	$OpenBSD: installboot.c,v 1.11 2015/11/29 00:14:07 deraadt Exp $	*/
2 
3 /*
4  * Copyright (c) 2012, 2013 Joel Sing <jsing@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <err.h>
20 #include <fcntl.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <unistd.h>
25 #include <util.h>
26 
27 #include "installboot.h"
28 
29 int	nowrite;
30 int	stages;
31 int	verbose;
32 
33 char	*root = "/";
34 char	*stage1;
35 char	*stage2;
36 
37 static __dead void
38 usage(void)
39 {
40 	extern char *__progname;
41 
42 	fprintf(stderr, "usage: %s [-nv] [-r root] disk [stage1%s]\n",
43 	    __progname, (stages >= 2) ? " [stage2]" : "");
44 
45 	exit(1);
46 }
47 
48 int
49 main(int argc, char **argv)
50 {
51 	char *dev, *realdev;
52 	int devfd, opt;
53 
54 	md_init();
55 
56 	while ((opt = getopt(argc, argv, "nr:v")) != -1) {
57 		switch (opt) {
58 		case 'n':
59 			nowrite = 1;
60 			break;
61 		case 'r':
62 			root = strdup(optarg);
63 			if (root == NULL)
64 				err(1, "strdup");
65 			break;
66 		case 'v':
67 			verbose = 1;
68 			break;
69 		default:
70 			usage();
71 		}
72 	}
73 
74 	argc -= optind;
75 	argv += optind;
76 
77 	if (argc < 1 || argc > stages + 1)
78 		usage();
79 
80 	dev = argv[0];
81 	if (argc > 1)
82 		stage1 = argv[1];
83 	if (argc > 2)
84 		stage2 = argv[2];
85 
86 	/* Prefix stages with root, unless they were user supplied. */
87 	if (verbose)
88 		fprintf(stderr, "Using %s as root\n", root);
89 	if (argc <= 1 && stage1 != NULL) {
90 		stage1 = fileprefix(root, stage1);
91 		if (stage1 == NULL)
92 			exit(1);
93 	}
94 	if (argc <= 2 && stage2 != NULL) {
95 		stage2 = fileprefix(root, stage2);
96 		if (stage2 == NULL)
97 			exit(1);
98 	}
99 
100 	if ((devfd = opendev(dev, (nowrite ? O_RDONLY : O_RDWR), OPENDEV_PART,
101 	    &realdev)) < 0)
102 		err(1, "open: %s", realdev);
103 
104         if (verbose) {
105 		fprintf(stderr, "%s bootstrap on %s\n",
106 		    (nowrite ? "would install" : "installing"), realdev);
107 		if (stage1)
108 			fprintf(stderr, "using first-stage %s", stage1);
109 		if (stage2)
110 			fprintf(stderr, ", second-stage %s", stage2);
111 		fprintf(stderr, "\n");
112 	}
113 
114 	md_loadboot();
115 
116 #ifdef SOFTRAID
117 	sr_installboot(devfd, dev);
118 #else
119 	md_installboot(devfd, realdev);
120 #endif
121 
122 	return 0;
123 }
124