1 /*	$OpenBSD: installboot.c,v 1.16 2022/11/08 12:08:53 kn 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	prepare;
31 int	stages;
32 int	verbose;
33 
34 char	*root;
35 char	*stage1;
36 char	*stage2;
37 
38 static __dead void
39 usage(void)
40 {
41 	fprintf(stderr, "usage:\t%1$s [-nv] [-r root] disk [stage1%2$s]\n"
42 	    "\t%1$s [-nv] -p disk\n",
43 	    getprogname(), (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, "npr:v")) != -1) {
57 		switch (opt) {
58 		case 'n':
59 			nowrite = 1;
60 			break;
61 		case 'p':
62 			prepare = 1;
63 			break;
64 		case 'r':
65 			root = optarg;
66 			break;
67 		case 'v':
68 			verbose = 1;
69 			break;
70 		default:
71 			usage();
72 		}
73 	}
74 
75 	argc -= optind;
76 	argv += optind;
77 
78 	if (argc < 1 || argc > stages + 1)
79 		usage();
80 	if (prepare && (root != NULL || argc > 1))
81 		usage();
82 
83 	dev = argv[0];
84 	if (argc > 1)
85 		stage1 = argv[1];
86 	if (argc > 2)
87 		stage2 = argv[2];
88 
89 	if ((devfd = opendev(dev, (nowrite ? O_RDONLY : O_RDWR), OPENDEV_PART,
90 	    &realdev)) == -1)
91 		err(1, "open: %s", realdev);
92 
93 	if (prepare) {
94 #if SOFTRAID
95 		sr_prepareboot(devfd, dev);
96 #else
97 		md_prepareboot(devfd, realdev);
98 #endif
99 		return 0;
100 	}
101 
102 	/* Prefix stages with root, unless they were user supplied. */
103 	if (root == NULL)
104 		root = "/";
105 	if (verbose)
106 		fprintf(stderr, "Using %s as root\n", root);
107 	if (argc <= 1 && stage1 != NULL) {
108 		stage1 = fileprefix(root, stage1);
109 		if (stage1 == NULL)
110 			exit(1);
111 	}
112 	if (argc <= 2 && stage2 != NULL) {
113 		stage2 = fileprefix(root, stage2);
114 		if (stage2 == NULL)
115 			exit(1);
116 	}
117 
118         if (verbose) {
119 		fprintf(stderr, "%s bootstrap on %s\n",
120 		    (nowrite ? "would install" : "installing"), realdev);
121 		if (stage1 || stage2) {
122 			if (stage1)
123 				fprintf(stderr, "using first-stage %s", stage1);
124 			if (stage2)
125 				fprintf(stderr, ", second-stage %s", stage2);
126 			fprintf(stderr, "\n");
127 		}
128 	}
129 
130 	md_loadboot();
131 
132 #ifdef SOFTRAID
133 	sr_installboot(devfd, dev);
134 #else
135 	md_installboot(devfd, realdev);
136 #endif
137 
138 	return 0;
139 }
140