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.
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
36 #include <machine/elf.h>
38 #include <arpa/inet.h>
53 fprintf(stderr, "usage: ldd [-a] [-v] [-f format] program ...\n");
58 main(int argc, char *argv[])
60 char *fmt1 = NULL, *fmt2 = NULL;
67 while ((c = getopt(argc, argv, "avf:")) != -1) {
78 errx(1, "too many formats");
92 errx(1, "-v may not be used with -f");
101 for (c = 0; c < argc; c++)
103 exit(error_count == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
108 setenv("LD_TRACE_LOADED_OBJECTS", "yes", 1);
110 setenv("LD_TRACE_LOADED_OBJECTS_FMT1", fmt1, 1);
112 setenv("LD_TRACE_LOADED_OBJECTS_FMT2", fmt2, 1);
115 for ( ; argc > 0; argc--, argv++) {
126 if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
131 if ((n = read(fd, &hdr, sizeof hdr)) == -1) {
132 warn("%s: can't read program header", *argv);
140 if ((size_t)n >= sizeof hdr.aout && !N_BADMAG(hdr.aout)) {
142 if ((N_GETFLAG(hdr.aout) & EX_DPMASK) != EX_DYNAMIC
143 #if 1 /* Compatibility */
144 || hdr.aout.a_entry < __LDPGSZ
147 warnx("%s: not a dynamic executable", *argv);
150 } else if ((size_t)n >= sizeof hdr.elf && IS_ELF(hdr.elf)) {
155 if (lseek(fd, 0, SEEK_SET) == -1 ||
156 read(fd, &ehdr, sizeof ehdr) != sizeof ehdr ||
157 lseek(fd, ehdr.e_phoff, SEEK_SET) == -1
159 warnx("%s: can't read program header", *argv);
162 for (i = 0; i < ehdr.e_phnum; i++) {
163 if (read(fd, &phdr, ehdr.e_phentsize)
165 warnx("%s: can't read program header",
170 if (phdr.p_type == PT_DYNAMIC)
175 warnx("%s: not a dynamic executable", *argv);
177 } else if (hdr.elf.e_type == ET_DYN) {
178 if (hdr.elf.e_ident[EI_OSABI] & ELFOSABI_FREEBSD) {
181 warnx("%s: not a FreeBSD ELF shared "
187 warnx("%s: not a dynamic executable", *argv);
196 setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv, 1);
197 if (aflag) setenv("LD_TRACE_LOADED_OBJECTS_ALL", "1", 1);
198 else if (fmt1 == NULL && fmt2 == NULL)
199 /* Default formats */
200 printf("%s:\n", *argv);
209 if (wait(&status) <= 0) {
212 } else if (WIFSIGNALED(status)) {
213 fprintf(stderr, "%s: signal %d\n",
214 *argv, WTERMSIG(status));
216 } else if (WIFEXITED(status) && WEXITSTATUS(status)) {
217 fprintf(stderr, "%s: exit status %d\n",
218 *argv, WEXITSTATUS(status));
224 execl(*argv, *argv, (char *)NULL);
227 dlopen(*argv, RTLD_TRACE);
228 warnx("%s: %s", *argv, dlerror());