175 lines
4.2 KiB
C
175 lines
4.2 KiB
C
/*
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* Copyright (c) 1993 Paul Kranenburg
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: ldd.c,v 1.8 1996/10/29 18:45:20 peter Exp $
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/wait.h>
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#include <a.out.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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extern void dump_filename __P((const char *));
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extern int error_count;
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void
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usage()
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{
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extern char *__progname;
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fprintf(stderr, "Usage: %s [-f format] [-v] <filename> ...\n",
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__progname);
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exit(1);
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}
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *fmt1 = NULL, *fmt2 = NULL;
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int rval;
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int c;
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int vflag = 0;
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while ((c = getopt(argc, argv, "vf:")) != EOF) {
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switch (c) {
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case 'v':
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vflag++;
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break;
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case 'f':
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if (fmt1) {
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if (fmt2)
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errx(1, "Too many formats");
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fmt2 = optarg;
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} else
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fmt1 = optarg;
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break;
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default:
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usage();
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/*NOTREACHED*/
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}
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}
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argc -= optind;
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argv += optind;
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if (vflag && fmt1)
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errx(1, "-v may not be used with -f");
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if (argc <= 0) {
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usage();
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/*NOTREACHED*/
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}
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if (vflag) {
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for (c = 0; c < argc; c++)
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dump_file(argv[c]);
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exit(error_count == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
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}
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/* ld.so magic */
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setenv("LD_TRACE_LOADED_OBJECTS", "", 1);
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if (fmt1)
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setenv("LD_TRACE_LOADED_OBJECTS_FMT1", fmt1, 1);
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if (fmt2)
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setenv("LD_TRACE_LOADED_OBJECTS_FMT2", fmt2, 1);
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rval = 0;
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while (argc--) {
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int fd;
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struct exec hdr;
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int status;
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if ((fd = open(*argv, O_RDONLY, 0)) < 0) {
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warn("%s", *argv);
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rval |= 1;
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argv++;
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continue;
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}
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if (read(fd, &hdr, sizeof hdr) != sizeof hdr
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|| (N_GETFLAG(hdr) & EX_DPMASK) != EX_DYNAMIC
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#if 1 /* Compatibility */
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|| hdr.a_entry < __LDPGSZ
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#endif
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) {
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warnx("%s: not a dynamic executable", *argv);
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(void)close(fd);
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rval |= 1;
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argv++;
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continue;
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}
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(void)close(fd);
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setenv("LD_TRACE_LOADED_OBJECTS_PROGNAME", *argv, 1);
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if (fmt1 == NULL && fmt2 == NULL)
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/* Default formats */
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printf("%s:\n", *argv);
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fflush(stdout);
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switch (fork()) {
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case -1:
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err(1, "fork");
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break;
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default:
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if (wait(&status) <= 0) {
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warn("wait");
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rval |= 1;
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} else if (WIFSIGNALED(status)) {
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fprintf(stderr, "%s: signal %d\n",
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*argv, WTERMSIG(status));
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rval |= 1;
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} else if (WIFEXITED(status) && WEXITSTATUS(status)) {
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fprintf(stderr, "%s: exit status %d\n",
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*argv, WEXITSTATUS(status));
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rval |= 1;
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}
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break;
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case 0:
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rval |= execl(*argv, *argv, NULL) != 0;
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perror(*argv);
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_exit(1);
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}
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argv++;
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}
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return rval;
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}
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