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/*
* Copyright (c) 1993 Paul Kranenburg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: ldd.c,v 1.9 1996/11/22 13:58:03 peter Exp $
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <a.out.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
extern void dump_filename __P((const char *));
extern int error_count;
void
usage()
{
fprintf(stderr, "usage: ldd [-v] [-f format] program ...\n");
exit(1);
}
int
main(argc, argv)
int argc;
char *argv[];
{
char *fmt1 = NULL, *fmt2 = NULL;
int rval;
int c;
int vflag = 0;
while ((c = getopt(argc, argv, "vf:")) != EOF) {
switch (c) {
case 'v':
vflag++;
break;
case 'f':
if (fmt1) {
if (fmt2)
errx(1, "Too many formats");
fmt2 = optarg;
} else
fmt1 = optarg;
break;
default:
usage();
/*NOTREACHED*/
}
}
argc -= optind;
argv += optind;
if (vflag && fmt1)
errx(1, "-v may not be used with -f");
if (argc <= 0) {
usage();
/*NOTREACHED*/
}
if (vflag) {
for (c = 0; c < argc; c++)
dump_file(argv[c]);
exit(error_count == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
/* ld.so magic */
setenv("LD_TRACE_LOADED_OBJECTS", "", 1);
if (fmt1)
setenv("LD_TRACE_LOADED_OBJECTS_FMT1", fmt1, 1);
if (fmt2)
setenv("LD_TRACE_LOADED_OBJECTS_FMT2", fmt2, 1);
rval = 0;
while (argc--) {
int fd;
struct exec hdr;
int status;
if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
warn("%s", *argv);
rval |= 1;
argv++;
continue;
}
if (read(fd, &hdr, sizeof hdr) != sizeof hdr
|| (N_GETFLAG(hdr) & EX_DPMASK) != EX_DYNAMIC
#if 1 /* Compatibility */
|| hdr.a_entry < __LDPGSZ
#endif
) {
warnx("%s: not a dynamic executable", *argv);
(void)close(fd);
rval |= 1;
argv++;
continue;
}
(void)close(fd);
setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv, 1);
if (fmt1 == NULL && fmt2 == NULL)
/* Default formats */
printf("%s:\n", *argv);
fflush(stdout);
switch (fork()) {
case -1:
err(1, "fork");
break;
default:
if (wait(&status) <= 0) {
warn("wait");
rval |= 1;
} else if (WIFSIGNALED(status)) {
fprintf(stderr, "%s: signal %d\n",
*argv, WTERMSIG(status));
rval |= 1;
} else if (WIFEXITED(status) && WEXITSTATUS(status)) {
fprintf(stderr, "%s: exit status %d\n",
*argv, WEXITSTATUS(status));
rval |= 1;
}
break;
case 0:
rval |= execl(*argv, *argv, NULL) != 0;
perror(*argv);
_exit(1);
}
argv++;
}
return rval;
}
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