109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/* $NetBSD: paths.c,v 1.4 1999/03/01 16:40:07 christos Exp $ */
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/*
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* Copyright 1996 Matt Thomas <matt@3am-software.com>
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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. 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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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.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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#include <sys/types.h>
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#include <sys/mman.h>
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#include <dirent.h>
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#include "debug.h"
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#include "rtld.h"
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static Search_Path *_rtld_find_path __P((Search_Path *, const char *, size_t));
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static Search_Path *
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_rtld_find_path(path, pathstr, pathlen)
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Search_Path *path;
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const char *pathstr;
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size_t pathlen;
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{
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for (; path != NULL; path = path->sp_next) {
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if (pathlen == path->sp_pathlen &&
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memcmp(path->sp_path, pathstr, pathlen) == 0)
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return path;
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}
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return NULL;
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}
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void
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_rtld_add_paths(path_p, pathstr, dodebug)
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Search_Path ** path_p;
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const char *pathstr;
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bool dodebug;
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{
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Search_Path *path, **head_p = path_p;
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if (pathstr == NULL)
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return;
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if (pathstr[0] == ':') {
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/*
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* Leading colon means append to current path
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*/
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while ((*path_p) != NULL)
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path_p = &(*path_p)->sp_next;
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pathstr++;
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}
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for (;;) {
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const char *bp = pathstr;
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const char *ep = strchr(bp, ':');
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if (ep == NULL)
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ep = &pathstr[strlen(pathstr)];
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if (bp < ep &&
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(path = _rtld_find_path(*head_p, bp, ep - bp)) == NULL) {
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char *cp;
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path = CNEW(Search_Path);
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path->sp_pathlen = ep - bp;
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cp = xmalloc(path->sp_pathlen + 1);
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strncpy(cp, bp, path->sp_pathlen);
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cp[path->sp_pathlen] = '\0';
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path->sp_path = cp;
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path->sp_next = (*path_p);
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(*path_p) = path;
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path_p = &path->sp_next;
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if (dodebug)
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dbg((" added path \"%s\"", path->sp_path));
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}
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if (ep[0] == '\0')
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break;
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pathstr = ep + 1;
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}
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}
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