ldd.c revision 1153 
1/*
2 * Copyright (c) 1993 Paul Kranenburg
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 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *      This product includes software developed by Paul Kranenburg.
16 * 4. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 *	$Id: ldd.c,v 1.2 1993/11/09 04:19:27 paul Exp $
31 */
32
33#include <sys/param.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <errno.h>
38#include <sys/types.h>
39#include <sys/stat.h>
40#include <sys/file.h>
41#include <sys/time.h>
42#include <sys/resource.h>
43#include <fcntl.h>
44#include <sys/wait.h>
45#include <a.out.h>
46
47static char	*progname;
48
49void
50usage()
51{
52	fprintf(stderr, "Usage: %s <filename> ...\n", progname);
53}
54
55int
56main(argc, argv)
57int	argc;
58char	*argv[];
59{
60	int		rval = 0;
61	int		c;
62	extern int	optind;
63
64	if ((progname = strrchr(argv[0], '/')) == NULL)
65		progname = argv[0];
66	else
67		progname++;
68
69	while ((c = getopt(argc, argv, "")) != EOF) {
70		switch (c) {
71		default:
72			usage();
73			exit(1);
74		}
75	}
76	argc -= optind;
77	argv += optind;
78
79	if (argc <= 0) {
80		usage();
81		exit(1);
82	}
83
84	/* ld.so magic */
85	setenv("LD_TRACE_LOADED_OBJECTS", "", 1);
86
87	while (argc--) {
88		int	fd;
89		struct exec hdr;
90		int	status;
91
92		if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
93			perror(*argv);
94			rval |= 1;
95			argv++;
96			continue;
97		}
98		if (read(fd, &hdr, sizeof hdr) != sizeof hdr ||
99					!(N_GETFLAG(hdr) & EX_DYNAMIC)) {
100			fprintf(stderr, "%s: not a dynamic executable\n",
101						*argv);
102			(void)close(fd);
103			rval |= 1;
104			argv++;
105			continue;
106		}
107		(void)close(fd);
108
109		printf("%s:\n", *argv);
110		fflush(stdout);
111
112		switch (fork()) {
113		case -1:
114			perror("fork");
115			exit(1);
116			break;
117		default:
118			if (wait(&status) <= 0)
119				perror("wait");
120
121			if (WIFSIGNALED(status)) {
122				fprintf(stderr, "%s: signal %d\n",
123						*argv, WTERMSIG(status));
124				rval |= 1;
125			} else if (WIFEXITED(status) && WEXITSTATUS(status)) {
126				fprintf(stderr, "%s: exit status %d\n",
127						*argv, WEXITSTATUS(status));
128				rval |= 1;
129			}
130			break;
131		case 0:
132			rval != execl(*argv, *argv, NULL) != 0;
133			perror(*argv);
134			_exit(1);
135		}
136		argv++;
137	}
138
139	return rval;
140}
141