c79eac4c4c
NetBSD ld code except for local changes for dlopen() and friends and the hashing on the minor value of the shlibs. We should be binary compatible now with all their libraries. Obtained from: NetBSD
280 lines
6.2 KiB
C
280 lines
6.2 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: shlib.c,v 1.11 1995/01/05 02:36:29 swallace Exp $
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*/
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#include <sys/param.h>
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#include <stdio.h>
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#include <stdlib.h>
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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 <err.h>
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#include <fcntl.h>
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#include <string.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <a.out.h>
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#include "ld.h"
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#ifdef SUNOS4
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char *strsep();
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#endif
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/*
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* Standard directories to search for files specified by -l.
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*/
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#ifndef STANDARD_SEARCH_DIRS
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#define STANDARD_SEARCH_DIRS "/usr/lib", "/usr/local/lib"
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#endif
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/*
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* Actual vector of library search directories,
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* including `-L'ed and LD_LIBARAY_PATH spec'd ones.
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*/
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char **search_dirs;
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int n_search_dirs;
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char *standard_search_dirs[] = {
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STANDARD_SEARCH_DIRS
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};
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void
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add_search_dir(name)
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char *name;
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{
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n_search_dirs++;
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search_dirs = (char **)
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xrealloc(search_dirs, n_search_dirs * sizeof(char *));
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search_dirs[n_search_dirs - 1] = strdup(name);
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}
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void
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add_search_path(path)
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char *path;
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{
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register char *cp;
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if (path == NULL)
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return;
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/* Add search directories from `paths' */
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while ((cp = strsep(&path, ":")) != NULL) {
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add_search_dir(cp);
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if (path)
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*(path-1) = ':';
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}
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}
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void
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std_search_path()
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{
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int i, n;
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/* Append standard search directories */
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n = sizeof standard_search_dirs / sizeof standard_search_dirs[0];
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for (i = 0; i < n; i++)
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add_search_dir(standard_search_dirs[i]);
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}
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/*
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* Return true if CP points to a valid dewey number.
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* Decode and leave the result in the array DEWEY.
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* Return the number of decoded entries in DEWEY.
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*/
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int
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getdewey(dewey, cp)
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int dewey[];
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char *cp;
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{
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int i, n;
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for (n = 0, i = 0; i < MAXDEWEY; i++) {
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if (*cp == '\0')
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break;
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if (*cp == '.') cp++;
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if (!isdigit(*cp))
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return 0;
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dewey[n++] = strtol(cp, &cp, 10);
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}
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return n;
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}
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/*
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* Compare two dewey arrays.
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* Return -1 if `d1' represents a smaller value than `d2'.
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* Return 1 if `d1' represents a greater value than `d2'.
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* Return 0 if equal.
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*/
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int
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cmpndewey(d1, n1, d2, n2)
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int d1[], d2[];
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int n1, n2;
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{
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register int i;
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for (i = 0; i < n1 && i < n2; i++) {
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if (d1[i] < d2[i])
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return -1;
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if (d1[i] > d2[i])
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return 1;
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}
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if (n1 == n2)
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return 0;
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if (i == n1)
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return -1;
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if (i == n2)
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return 1;
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errx(1, "cmpndewey: cant happen");
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return 0;
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}
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/*
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* Search directories for a shared library matching the given
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* major and minor version numbers.
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*
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* MAJOR == -1 && MINOR == -1 --> find highest version
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* MAJOR != -1 && MINOR == -1 --> find highest minor version
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* MAJOR == -1 && MINOR != -1 --> invalid
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* MAJOR != -1 && MINOR != -1 --> find highest micro version
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*/
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/* Not interested in devices right now... */
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#undef major
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#undef minor
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char *
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findshlib(name, majorp, minorp, do_dot_a)
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char *name;
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int *majorp, *minorp;
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int do_dot_a;
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{
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int dewey[MAXDEWEY];
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int ndewey;
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int tmp[MAXDEWEY];
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int i;
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int len;
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char *lname, *path = NULL;
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int major = *majorp, minor = *minorp;
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len = strlen(name);
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lname = (char *)alloca(len + sizeof("lib"));
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sprintf(lname, "lib%s", name);
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len += 3;
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ndewey = 0;
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for (i = 0; i < n_search_dirs; i++) {
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DIR *dd = opendir(search_dirs[i]);
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struct dirent *dp;
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int found_dot_a = 0;
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if (dd == NULL)
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continue;
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while ((dp = readdir(dd)) != NULL) {
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int n, might_take_it = 0;
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if (do_dot_a && path == NULL &&
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dp->d_namlen == len + 2 &&
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strncmp(dp->d_name, lname, len) == 0 &&
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(dp->d_name+len)[0] == '.' &&
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(dp->d_name+len)[1] == 'a') {
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path = concat(search_dirs[i], "/", dp->d_name);
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found_dot_a = 1;
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}
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if (dp->d_namlen < len + 4)
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continue;
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if (strncmp(dp->d_name, lname, len) != 0)
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continue;
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if (strncmp(dp->d_name+len, ".so.", 4) != 0)
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continue;
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if ((n = getdewey(tmp, dp->d_name+len+4)) == 0)
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continue;
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if (major != -1 && found_dot_a) { /* XXX */
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free(path);
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path = NULL;
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found_dot_a = 0;
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}
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if (major == -1 && minor == -1) {
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might_take_it = 1;
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} else if (major != -1 && minor == -1) {
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if (tmp[0] == major)
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might_take_it = 1;
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} else if (major != -1 && minor != -1) {
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if (tmp[0] == major)
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if (n == 1 || tmp[1] >= minor)
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might_take_it = 1;
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}
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if (!might_take_it)
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continue;
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if (cmpndewey(tmp, n, dewey, ndewey) <= 0)
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continue;
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/* We have a better version */
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if (path)
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free(path);
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path = concat(search_dirs[i], "/", dp->d_name);
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found_dot_a = 0;
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bcopy(tmp, dewey, sizeof(dewey));
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ndewey = n;
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*majorp = dewey[0];
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*minorp = dewey[1];
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}
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closedir(dd);
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if (found_dot_a)
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/*
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* There's a .a archive here.
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*/
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return path;
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}
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return path;
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}
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