xref: /freebsd/sbin/ldconfig/ldconfig.c (revision 65990b68a2cd89a08f0350e187df1968b16f4255)
1 /*-
2  * SPDX-License-Identifier: BSD-4-Clause
3  *
4  * Copyright (c) 1993,1995 Paul Kranenburg
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *      This product includes software developed by Paul Kranenburg.
18  * 4. The name of the author may not be used to endorse or promote products
19  *    derived from this software without specific prior written permission
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <sys/param.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <sys/mman.h>
37 #include <a.out.h>
38 #include <ctype.h>
39 #include <dirent.h>
40 #include <elf-hints.h>
41 #include <err.h>
42 #include <errno.h>
43 #include <fcntl.h>
44 #include <stdbool.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49 
50 #include "ldconfig.h"
51 #include "rtld_paths.h"
52 
53 #define	_PATH_LD32_HINTS	"/var/run/ld32.so.hints"
54 #define	_PATH_ELF32_HINTS	"/var/run/ld-elf32.so.hints"
55 
56 static void usage(void);
57 
58 int
59 main(int argc, char **argv)
60 {
61 	const char *hints_file;
62 	int c;
63 	bool is_32, justread, merge, rescan, verbose;
64 
65 	is_32 = justread = merge = rescan = verbose = false;
66 
67 	while (argc > 1) {
68 		if (strcmp(argv[1], "-aout") == 0) {
69 			errx(1, "aout is not supported");
70 		} else if (strcmp(argv[1], "-elf") == 0) {
71 			argc--;
72 			argv++;
73 		} else if (strcmp(argv[1], "-32") == 0) {
74 			is_32 = true;
75 			argc--;
76 			argv++;
77 		} else {
78 			break;
79 		}
80 	}
81 
82 	if (is_32)
83 		hints_file = _PATH_ELF32_HINTS;
84 	else
85 		hints_file = _PATH_ELF_HINTS;
86 	while((c = getopt(argc, argv, "Rf:imrsv")) != -1) {
87 		switch (c) {
88 		case 'R':
89 			rescan = true;
90 			break;
91 		case 'f':
92 			hints_file = optarg;
93 			break;
94 		case 'i':
95 			insecure = true;
96 			break;
97 		case 'm':
98 			merge = true;
99 			break;
100 		case 'r':
101 			justread = true;
102 			break;
103 		case 's':
104 			/* was nostd */
105 			break;
106 		case 'v':
107 			verbose = true;
108 			break;
109 		default:
110 			usage();
111 			break;
112 		}
113 	}
114 
115 	if (justread) {
116 		list_elf_hints(hints_file);
117 	} else {
118 		if (argc == optind)
119 			rescan = true;
120 		update_elf_hints(hints_file, argc - optind,
121 		    argv + optind, merge || rescan);
122 	}
123 	exit(0);
124 }
125 
126 static void
127 usage(void)
128 {
129 	fprintf(stderr,
130 	    "usage: ldconfig [-32] [-elf] [-Rimrv] [-f hints_file] "
131 	    "[directory | file ...]\n");
132 	exit(1);
133 }
134