c2b2b84657
handling of errors through the standard err() and warn() more fixes for Geoff Rehmet's NULL pointer bug. fixes NULL pointer bugs when linking mono and nested X servers. supports a `-nostdlib' option. accept object files without a symbol table don't attempt dynamic linking when `-A' is given a few variable names have chaged (desc -> fd), and the formatting has changed which should make it much easier to track his sources. I tested 'make world' for /usr/src and X twice with these changes.
280 lines
6.2 KiB
C
280 lines
6.2 KiB
C
/*
|
|
* 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: shlib.c,v 1.8 1994/02/13 20:41:43 jkh Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/file.h>
|
|
#include <sys/time.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <dirent.h>
|
|
#include <a.out.h>
|
|
|
|
#include "ld.h"
|
|
|
|
#ifdef SUNOS4
|
|
char *strsep();
|
|
#endif
|
|
|
|
/*
|
|
* Standard directories to search for files specified by -l.
|
|
*/
|
|
#ifndef STANDARD_SEARCH_DIRS
|
|
#define STANDARD_SEARCH_DIRS "/usr/lib", "/usr/X11R6/lib", "/usr/X386/lib", "/usr/local/lib"
|
|
#endif
|
|
|
|
/*
|
|
* Actual vector of library search directories,
|
|
* including `-L'ed and LD_LIBARAY_PATH spec'd ones.
|
|
*/
|
|
char **search_dirs;
|
|
int n_search_dirs;
|
|
|
|
char *standard_search_dirs[] = {
|
|
STANDARD_SEARCH_DIRS
|
|
};
|
|
|
|
|
|
void
|
|
add_search_dir(name)
|
|
char *name;
|
|
{
|
|
n_search_dirs++;
|
|
search_dirs = (char **)
|
|
xrealloc(search_dirs, n_search_dirs * sizeof(char *));
|
|
search_dirs[n_search_dirs - 1] = strdup(name);
|
|
}
|
|
|
|
void
|
|
add_search_path(path)
|
|
char *path;
|
|
{
|
|
register char *cp;
|
|
|
|
if (path == NULL)
|
|
return;
|
|
|
|
/* Add search directories from `paths' */
|
|
while ((cp = strsep(&path, ":")) != NULL) {
|
|
add_search_dir(cp);
|
|
if (path)
|
|
*(path-1) = ':';
|
|
}
|
|
}
|
|
|
|
void
|
|
std_search_path()
|
|
{
|
|
int i, n;
|
|
|
|
/* Append standard search directories */
|
|
n = sizeof standard_search_dirs / sizeof standard_search_dirs[0];
|
|
for (i = 0; i < n; i++)
|
|
add_search_dir(standard_search_dirs[i]);
|
|
}
|
|
|
|
/*
|
|
* Return true if CP points to a valid dewey number.
|
|
* Decode and leave the result in the array DEWEY.
|
|
* Return the number of decoded entries in DEWEY.
|
|
*/
|
|
|
|
int
|
|
getdewey(dewey, cp)
|
|
int dewey[];
|
|
char *cp;
|
|
{
|
|
int i, n;
|
|
|
|
for (n = 0, i = 0; i < MAXDEWEY; i++) {
|
|
if (*cp == '\0')
|
|
break;
|
|
|
|
if (*cp == '.') cp++;
|
|
if (!isdigit(*cp))
|
|
return 0;
|
|
|
|
dewey[n++] = strtol(cp, &cp, 10);
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* Compare two dewey arrays.
|
|
* Return -1 if `d1' represents a smaller value than `d2'.
|
|
* Return 1 if `d1' represents a greater value than `d2'.
|
|
* Return 0 if equal.
|
|
*/
|
|
int
|
|
cmpndewey(d1, n1, d2, n2)
|
|
int d1[], d2[];
|
|
int n1, n2;
|
|
{
|
|
register int i;
|
|
|
|
for (i = 0; i < n1 && i < n2; i++) {
|
|
if (d1[i] < d2[i])
|
|
return -1;
|
|
if (d1[i] > d2[i])
|
|
return 1;
|
|
}
|
|
|
|
if (n1 == n2)
|
|
return 0;
|
|
|
|
if (i == n1)
|
|
return -1;
|
|
|
|
if (i == n2)
|
|
return 1;
|
|
|
|
errx(1, "cmpndewey: cant happen");
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Search directories for a shared library matching the given
|
|
* major and minor version numbers.
|
|
*
|
|
* MAJOR == -1 && MINOR == -1 --> find highest version
|
|
* MAJOR != -1 && MINOR == -1 --> find highest minor version
|
|
* MAJOR == -1 && MINOR != -1 --> invalid
|
|
* MAJOR != -1 && MINOR != -1 --> find highest micro version
|
|
*/
|
|
|
|
/* Not interested in devices right now... */
|
|
#undef major
|
|
#undef minor
|
|
|
|
char *
|
|
findshlib(name, majorp, minorp, do_dot_a)
|
|
char *name;
|
|
int *majorp, *minorp;
|
|
int do_dot_a;
|
|
{
|
|
int dewey[MAXDEWEY];
|
|
int ndewey;
|
|
int tmp[MAXDEWEY];
|
|
int i;
|
|
int len;
|
|
char *lname, *path = NULL;
|
|
int major = *majorp, minor = *minorp;
|
|
|
|
len = strlen(name);
|
|
lname = (char *)alloca(len + sizeof("lib"));
|
|
sprintf(lname, "lib%s", name);
|
|
len += 3;
|
|
|
|
ndewey = 0;
|
|
|
|
for (i = 0; i < n_search_dirs; i++) {
|
|
DIR *dd = opendir(search_dirs[i]);
|
|
struct dirent *dp;
|
|
int found_dot_a = 0;
|
|
|
|
if (dd == NULL)
|
|
continue;
|
|
|
|
while ((dp = readdir(dd)) != NULL) {
|
|
int n, might_take_it = 0;
|
|
|
|
if (do_dot_a && path == NULL &&
|
|
dp->d_namlen == len + 2 &&
|
|
strncmp(dp->d_name, lname, len) == 0 &&
|
|
(dp->d_name+len)[0] == '.' &&
|
|
(dp->d_name+len)[1] == 'a') {
|
|
|
|
path = concat(search_dirs[i], "/", dp->d_name);
|
|
found_dot_a = 1;
|
|
}
|
|
|
|
if (dp->d_namlen < len + 4)
|
|
continue;
|
|
if (strncmp(dp->d_name, lname, len) != 0)
|
|
continue;
|
|
if (strncmp(dp->d_name+len, ".so.", 4) != 0)
|
|
continue;
|
|
|
|
if ((n = getdewey(tmp, dp->d_name+len+4)) == 0)
|
|
continue;
|
|
|
|
if (major != -1 && found_dot_a) { /* XXX */
|
|
free(path);
|
|
path = NULL;
|
|
found_dot_a = 0;
|
|
}
|
|
|
|
if (major == -1 && minor == -1) {
|
|
might_take_it = 1;
|
|
} else if (major != -1 && minor == -1) {
|
|
if (tmp[0] == major)
|
|
might_take_it = 1;
|
|
} else if (major != -1 && minor != -1) {
|
|
if (tmp[0] == major)
|
|
if (n == 1 || tmp[1] >= minor)
|
|
might_take_it = 1;
|
|
}
|
|
|
|
if (!might_take_it)
|
|
continue;
|
|
|
|
if (cmpndewey(tmp, n, dewey, ndewey) <= 0)
|
|
continue;
|
|
|
|
/* We have a better version */
|
|
if (path)
|
|
free(path);
|
|
path = concat(search_dirs[i], "/", dp->d_name);
|
|
found_dot_a = 0;
|
|
bcopy(tmp, dewey, sizeof(dewey));
|
|
ndewey = n;
|
|
*majorp = dewey[0];
|
|
*minorp = dewey[1];
|
|
}
|
|
closedir(dd);
|
|
|
|
if (found_dot_a)
|
|
/*
|
|
* There's a .a archive here.
|
|
*/
|
|
return path;
|
|
}
|
|
|
|
return path;
|
|
}
|