2 * Copyright (c) 1993 Paul Kranenburg
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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
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.
30 * $FreeBSD: src/usr.bin/ldd/ldd.c,v 1.18.2.7 2002/02/27 18:35:53 sobomax Exp $
33 #include <sys/param.h>
36 #include <machine/elf.h>
44 static void usage(void);
49 fprintf(stderr
, "usage: ldd [-av] [-f format] program ...\n");
54 main(int argc
, char **argv
)
56 char *fmt1
= NULL
, *fmt2
= NULL
;
62 while ((c
= getopt(argc
, argv
, "af:v")) != -1) {
70 errx(1, "too many formats");
91 if (setenv("LD_TRACE_LOADED_OBJECTS", "yes", 1) == -1)
92 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS=1");
94 if (setenv("LD_TRACE_LOADED_OBJECTS_FMT1", fmt1
, 1) == -1)
95 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS_FMT1=%s", fmt1
);
98 if (setenv("LD_TRACE_LOADED_OBJECTS_FMT2", fmt2
, 1) == -1)
99 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS_FMT2=%s", fmt2
);
103 for ( ; argc
> 0; argc
--, argv
++) {
113 if ((fd
= open(*argv
, O_RDONLY
, 0)) < 0) {
118 if ((n
= read(fd
, &hdr
, sizeof hdr
)) == -1) {
119 warn("%s: can't read program header", *argv
);
127 if ((size_t)n
>= sizeof hdr
.elf
&& IS_ELF(hdr
.elf
)) {
132 if (lseek(fd
, 0, SEEK_SET
) == -1 ||
133 read(fd
, &ehdr
, sizeof ehdr
) != sizeof ehdr
||
134 lseek(fd
, ehdr
.e_phoff
, SEEK_SET
) == -1
136 warnx("%s: can't read program header", *argv
);
139 for (i
= 0; i
< ehdr
.e_phnum
; i
++) {
140 if (read(fd
, &phdr
, ehdr
.e_phentsize
)
142 warnx("%s: can't read program header",
147 if (phdr
.p_type
== PT_DYNAMIC
)
152 warnx("%s: not a dynamic executable", *argv
);
154 } else if (hdr
.elf
.e_type
== ET_DYN
) {
158 warnx("%s: not a dynamic executable", *argv
);
167 if (setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv
, 1) == -1)
168 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS_PROGNAME=%s", *argv
);
169 if (aflag
) setenv("LD_TRACE_LOADED_OBJECTS_ALL", "1", 1);
170 else if (fmt1
== NULL
&& fmt2
== NULL
)
171 /* Default formats */
172 printf("%s:\n", *argv
);
180 if (wait(&status
) <= 0) {
183 } else if (WIFSIGNALED(status
)) {
184 fprintf(stderr
, "%s: signal %d\n",
185 *argv
, WTERMSIG(status
));
187 } else if (WIFEXITED(status
) && WEXITSTATUS(status
)) {
188 fprintf(stderr
, "%s: exit status %d\n",
189 *argv
, WEXITSTATUS(status
));
195 execl(*argv
, *argv
, NULL
);
198 dlopen(*argv
, RTLD_TRACE
);
199 warnx("%s: %s", *argv
, dlerror());