NetBSD-5.0.2/usr.bin/ldd/ldd.c
/* $NetBSD: ldd.c,v 1.2.12.2 2009/02/25 03:09:31 snj Exp $ */
/*-
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright 1996 John D. Polstra.
* Copyright 1996 Matt Thomas <matt@3am-software.com>
* 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 John Polstra.
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: ldd.c,v 1.2.12.2 2009/02/25 03:09:31 snj Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <a.out.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include "debug.h"
#include "rtld.h"
#include "ldd.h"
/*
* Data declarations.
*/
static char *error_message; /* Message for dlopen(), or NULL */
bool _rtld_trust; /* False for setuid and setgid programs */
Obj_Entry *_rtld_objlist; /* Head of linked list of shared objects */
Obj_Entry **_rtld_objtail = &_rtld_objlist;
/* Link field of last object in list */
Obj_Entry *_rtld_objmain; /* The main program shared object */
int _rtld_pagesz;
Search_Path *_rtld_default_paths;
Search_Path *_rtld_paths;
Library_Xform *_rtld_xforms;
static void usage(void) __dead;
char *main_local;
char *main_progname;
static void
usage(void)
{
fprintf(stderr, "Usage: %s [-f <format 1>] [-f <format 2>] <filename>"
" ...\n", getprogname());
exit(1);
}
int
main(int argc, char **argv)
{
char *fmt1 = NULL, *fmt2 = NULL;
int c;
#ifdef DEBUG
debug = 1;
#endif
while ((c = getopt(argc, argv, "f:")) != -1) {
switch (c) {
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 (argc <= 0) {
usage();
/*NOTREACHED*/
}
for (; argc != 0; argc--, argv++) {
int fd;
fd = open(*argv, O_RDONLY);
if (fd == -1) {
warn("%s", *argv);
continue;
}
if (elf_ldd(fd, *argv, fmt1, fmt2) == -1 &&
/* Alpha never had 32 bit support. */
#if defined(_LP64) && !defined(__alpha__)
elf32_ldd(fd, *argv, fmt1, fmt2) == -1 &&
#endif
aout_ldd(fd, *argv, fmt1, fmt2) == -1)
warnx("%s", error_message);
close(fd);
}
return 0;
}
/*
* Error reporting function. Use it like printf. If formats the message
* into a buffer, and sets things up so that the next call to dlerror()
* will return the message.
*/
void
_rtld_error(const char *fmt, ...)
{
static char buf[512];
va_list ap;
va_start(ap, fmt);
xvsnprintf(buf, sizeof buf, fmt, ap);
error_message = buf;
va_end(ap);
}
char *
dlerror()
{
char *msg = error_message;
error_message = NULL;
return msg;
}
void
fmtprint(const char *libname, Obj_Entry *obj, const char *fmt1,
const char *fmt2)
{
const char *libpath = obj ? obj->path : "not found";
char libnamebuf[200];
char *libmajor = NULL;
const char *fmt;
char *cp;
int c;
if (strncmp(libname, "lib", 3) == 0 &&
(cp = strstr(libname, ".so")) != NULL) {
int i = cp - (libname + 3);
if (i >= sizeof(libnamebuf))
i = sizeof(libnamebuf) - 1;
(void)memcpy(libnamebuf, libname + 3, i);
libnamebuf[i] = '\0';
if (cp[3] && isdigit((unsigned char)cp[4]))
libmajor = &cp[4];
libname = libnamebuf;
}
if (fmt1 == NULL)
fmt1 = libmajor != NULL ?
"\t-l%o.%m => %p\n" :
"\t-l%o => %p\n";
if (fmt2 == NULL)
fmt2 = "\t%o => %p\n";
fmt = libname == libnamebuf ? fmt1 : fmt2;
while ((c = *fmt++) != '\0') {
switch (c) {
default:
putchar(c);
continue;
case '\\':
switch (c = *fmt) {
case '\0':
continue;
case 'n':
putchar('\n');
break;
case 't':
putchar('\t');
break;
}
break;
case '%':
switch (c = *fmt) {
case '\0':
continue;
case '%':
default:
putchar(c);
break;
case 'A':
printf("%s", main_local);
break;
case 'a':
printf("%s", main_progname);
break;
case 'o':
printf("%s", libname);
break;
case 'm':
printf("%s", libmajor);
break;
case 'n':
/* XXX: not supported for elf */
break;
case 'p':
printf("%s", libpath);
break;
case 'x':
printf("%p", obj ? obj->mapbase : 0);
break;
}
break;
}
++fmt;
}
}
void
print_needed(Obj_Entry *obj, const char *fmt1, const char *fmt2)
{
const Needed_Entry *needed;
for (needed = obj->needed; needed != NULL; needed = needed->next) {
const char *libname = obj->strtab + needed->name;
if (needed->obj != NULL) {
print_needed(needed->obj, fmt1, fmt2);
if (!needed->obj->printed) {
fmtprint(libname, needed->obj, fmt1, fmt2);
needed->obj->printed = 1;
}
} else {
fmtprint(libname, needed->obj, fmt1, fmt2);
}
}
}