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>
45 extern void dump_file(const char *);
46 extern int error_count
;
51 fprintf(stderr
, "usage: ldd [-a] [-v] [-f format] program ...\n");
56 main(int argc
, char **argv
)
58 char *fmt1
= NULL
, *fmt2
= NULL
;
64 while ((c
= getopt(argc
, argv
, "avf:")) != -1) {
72 errx(1, "too many formats");
89 errx(1, "-v may not be used with -f");
98 for (c
= 0; c
< argc
; c
++)
100 exit(error_count
== 0 ? EXIT_SUCCESS
: EXIT_FAILURE
);
105 if (setenv("LD_TRACE_LOADED_OBJECTS", "yes", 1) == -1)
106 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS=1");
108 if (setenv("LD_TRACE_LOADED_OBJECTS_FMT1", fmt1
, 1) == -1)
109 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS_FMT1=%s", fmt1
);
112 if (setenv("LD_TRACE_LOADED_OBJECTS_FMT2", fmt2
, 1) == -1)
113 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS_FMT2=%s", fmt2
);
117 for ( ; argc
> 0; argc
--, argv
++) {
128 if ((fd
= open(*argv
, O_RDONLY
, 0)) < 0) {
133 if ((n
= read(fd
, &hdr
, sizeof hdr
)) == -1) {
134 warn("%s: can't read program header", *argv
);
142 if (n
>= sizeof hdr
.aout
&& !N_BADMAG(hdr
.aout
)) {
144 if ((N_GETFLAG(hdr
.aout
) & EX_DPMASK
) != EX_DYNAMIC
145 #if 1 /* Compatibility */
146 || hdr
.aout
.a_entry
< __LDPGSZ
149 warnx("%s: not a dynamic executable", *argv
);
152 } else if (n
>= sizeof hdr
.elf
&& IS_ELF(hdr
.elf
)) {
157 if (lseek(fd
, 0, SEEK_SET
) == -1 ||
158 read(fd
, &ehdr
, sizeof ehdr
) != sizeof ehdr
||
159 lseek(fd
, ehdr
.e_phoff
, SEEK_SET
) == -1
161 warnx("%s: can't read program header", *argv
);
164 for (i
= 0; i
< ehdr
.e_phnum
; i
++) {
165 if (read(fd
, &phdr
, ehdr
.e_phentsize
)
167 warnx("%s: can't read program header",
172 if (phdr
.p_type
== PT_DYNAMIC
)
177 warnx("%s: not a dynamic executable", *argv
);
179 } else if (hdr
.elf
.e_type
== ET_DYN
) {
183 warnx("%s: not a dynamic executable", *argv
);
192 if (setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv
, 1) == -1)
193 err(1, "setenv: cannot set LD_TRACE_LOADED_OBJECTS_PROGNAME=%s", *argv
);
194 if (aflag
) setenv("LD_TRACE_LOADED_OBJECTS_ALL", "1", 1);
195 else if (fmt1
== NULL
&& fmt2
== NULL
)
196 /* Default formats */
197 printf("%s:\n", *argv
);
205 if (wait(&status
) <= 0) {
208 } else if (WIFSIGNALED(status
)) {
209 fprintf(stderr
, "%s: signal %d\n",
210 *argv
, WTERMSIG(status
));
212 } else if (WIFEXITED(status
) && WEXITSTATUS(status
)) {
213 fprintf(stderr
, "%s: exit status %d\n",
214 *argv
, WEXITSTATUS(status
));
220 execl(*argv
, *argv
, NULL
);
223 dlopen(*argv
, RTLD_TRACE
);
224 warnx("%s: %s", *argv
, dlerror());