184 lines
5.3 KiB
C
184 lines
5.3 KiB
C
/* $NetBSD: ldd.c,v 1.8 1999/12/13 09:10:16 christos Exp $ */
|
||
|
||
/*
|
||
* 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 <err.h>
|
||
#include <errno.h>
|
||
#include <fcntl.h>
|
||
#include <stdarg.h>
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <unistd.h>
|
||
#include <sys/types.h>
|
||
#include <sys/mman.h>
|
||
#include <dirent.h>
|
||
|
||
#include "debug.h"
|
||
#include "rtld.h"
|
||
|
||
/*
|
||
* Data declarations.
|
||
*/
|
||
const char *_rtld_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 */
|
||
#ifdef VARPSZ
|
||
int _rtld_pagesz = 8192; /* XXX fake variable page size */
|
||
#endif
|
||
|
||
Search_Path *_rtld_default_paths;
|
||
Search_Path *_rtld_paths;
|
||
Library_Xform *_rtld_xforms;
|
||
|
||
static void print_needed(Obj_Entry *);
|
||
|
||
int
|
||
main(
|
||
int argc,
|
||
char **argv)
|
||
{
|
||
#ifdef DEBUG
|
||
debug = 1;
|
||
#endif
|
||
_rtld_add_paths(&_rtld_default_paths, RTLD_DEFAULT_LIBRARY_PATH, true);
|
||
|
||
|
||
_rtld_trust = geteuid() == getuid() && getegid() == getgid();
|
||
|
||
if (_rtld_trust) {
|
||
_rtld_add_paths(&_rtld_paths, getenv("LD_LIBRARY_PATH"), true);
|
||
}
|
||
|
||
_rtld_process_hints(&_rtld_paths, &_rtld_xforms, _PATH_LD_HINTS, true);
|
||
|
||
for (argc--, argv++; argc != 0; argc--, argv++) {
|
||
int fd = open(*argv, O_RDONLY);
|
||
if (fd == -1) {
|
||
warn("%s", *argv);
|
||
continue;
|
||
}
|
||
_rtld_objmain = _rtld_map_object(*argv, fd, NULL);
|
||
close(fd);
|
||
if (_rtld_objmain == NULL) {
|
||
warnx("%s", _rtld_error_message);
|
||
continue;
|
||
}
|
||
|
||
_rtld_objmain->path = xstrdup(*argv);
|
||
_rtld_objmain->mainprog = true;
|
||
_rtld_digest_dynamic(_rtld_objmain);
|
||
|
||
/* Link the main program into the list of objects. */
|
||
*_rtld_objtail = _rtld_objmain;
|
||
_rtld_objtail = &_rtld_objmain->next;
|
||
++_rtld_objmain->refcount;
|
||
|
||
(void) _rtld_load_needed_objects(_rtld_objmain, true);
|
||
|
||
printf("%s:\n", _rtld_objmain->path);
|
||
print_needed(_rtld_objmain);
|
||
|
||
while (_rtld_objlist != NULL) {
|
||
Obj_Entry *obj = _rtld_objlist;
|
||
_rtld_objlist = obj->next;
|
||
while (obj->rpaths != NULL) {
|
||
const Search_Path *rpath = obj->rpaths;
|
||
obj->rpaths = rpath->sp_next;
|
||
free((void *) rpath->sp_path);
|
||
free((void *) rpath);
|
||
}
|
||
while (obj->needed != NULL) {
|
||
const Needed_Entry *needed = obj->needed;
|
||
obj->needed = needed->next;
|
||
free((void *) needed);
|
||
}
|
||
(void) munmap(obj->relocbase, obj->mapsize);
|
||
free(obj->path);
|
||
free(obj);
|
||
}
|
||
|
||
_rtld_objmain = NULL;
|
||
_rtld_objtail = &_rtld_objlist;
|
||
}
|
||
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);
|
||
_rtld_error_message = buf;
|
||
va_end(ap);
|
||
}
|
||
|
||
static void
|
||
print_needed(
|
||
Obj_Entry *obj)
|
||
{
|
||
const Needed_Entry *needed;
|
||
|
||
for (needed = obj->needed; needed != NULL; needed = needed->next) {
|
||
char libnamebuf[200];
|
||
const char *libname = obj->strtab + needed->name, *cp;
|
||
if (strncmp(libname, "lib", 3) == 0
|
||
&& (cp = strstr(libname, ".so")) != NULL) {
|
||
strcpy(libnamebuf, "-l");
|
||
memcpy(&libnamebuf[2], libname + 3, cp - (libname + 3));
|
||
strcpy(&libnamebuf[cp - (libname + 3) + 2], cp + 3);
|
||
libname = libnamebuf;
|
||
}
|
||
|
||
if (needed->obj != NULL) {
|
||
print_needed(needed->obj);
|
||
if (!needed->obj->printed) {
|
||
printf("\t %s => %s\n", libname, needed->obj->path);
|
||
needed->obj->printed = 1;
|
||
}
|
||
} else {
|
||
printf("\t %s => not found\n", libname);
|
||
}
|
||
}
|
||
}
|