7551d83c35
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
651 lines
14 KiB
C
651 lines
14 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1993,1995 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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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <a.out.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <elf-hints.h>
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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 <sys/link_aout.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 "ldconfig.h"
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#include "shlib.h"
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#include "support.h"
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#if DEBUG
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/* test */
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#undef _PATH_LD_HINTS
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#define _PATH_LD_HINTS "./ld.so.hints"
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#undef _PATH_ELF_HINTS
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#define _PATH_ELF_HINTS "./ld-elf.so.hints"
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#endif
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#define _PATH_LD32_HINTS "/var/run/ld32.so.hints"
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#define _PATH_ELF32_HINTS "/var/run/ld-elf32.so.hints"
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#define _PATH_ELFSOFT_HINTS "/var/run/ld-elf-soft.so.hints"
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#undef major
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#undef minor
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static int verbose;
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static int nostd;
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static int justread;
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static int merge;
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static int rescan;
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static const char *hints_file;
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struct shlib_list {
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/* Internal list of shared libraries found */
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char *name;
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char *path;
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int dewey[MAXDEWEY];
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int ndewey;
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#define major dewey[0]
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#define minor dewey[1]
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struct shlib_list *next;
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};
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static struct shlib_list *shlib_head = NULL, **shlib_tail = &shlib_head;
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static char *dir_list;
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static int buildhints(void);
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static int dodir(char *, int);
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int dofile(char *, int);
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static void enter(char *, char *, char *, int *, int);
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static void listhints(void);
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static int readhints(void);
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static void usage(void);
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/*
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* Note on aout/a.out support.
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* To properly support shared libraries for compat2x, which are a.out, we need
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* to support a.out here. As of 2013, bug reports are still coming in for this
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* feature (on amd64 no less), so we know it is still in use.
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*/
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int
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main(int argc, char **argv)
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{
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int i, c;
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int rval = 0;
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int is_aout = 0;
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int is_32 = 0;
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int is_soft = 0;
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while (argc > 1) {
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if (strcmp(argv[1], "-aout") == 0) {
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is_aout = 1;
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argc--;
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argv++;
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} else if (strcmp(argv[1], "-elf") == 0) {
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is_aout = 0;
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argc--;
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argv++;
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} else if (strcmp(argv[1], "-32") == 0) {
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is_32 = 1;
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argc--;
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argv++;
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} else if (strcmp(argv[1], "-soft") == 0) {
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is_soft = 1;
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argc--;
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argv++;
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} else {
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break;
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}
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}
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if (is_soft)
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hints_file = _PATH_ELFSOFT_HINTS; /* Never will have a.out softfloat */
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else if (is_32)
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hints_file = is_aout ? _PATH_LD32_HINTS : _PATH_ELF32_HINTS;
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else
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hints_file = is_aout ? _PATH_LD_HINTS : _PATH_ELF_HINTS;
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if (argc == 1)
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rescan = 1;
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else while((c = getopt(argc, argv, "Rf:imrsv")) != -1) {
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switch (c) {
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case 'R':
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rescan = 1;
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break;
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case 'f':
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hints_file = optarg;
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break;
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case 'i':
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insecure = 1;
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break;
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case 'm':
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merge = 1;
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break;
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case 'r':
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justread = 1;
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break;
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case 's':
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nostd = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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default:
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usage();
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break;
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}
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}
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if (!is_aout) {
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if (justread)
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list_elf_hints(hints_file);
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else
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update_elf_hints(hints_file, argc - optind,
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argv + optind, merge || rescan);
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return 0;
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}
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/* Here begins the aout libs processing */
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dir_list = strdup("");
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if (justread || merge || rescan) {
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if ((rval = readhints()) != 0)
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return rval;
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}
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if (!nostd && !merge && !rescan)
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std_search_path();
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/* Add any directories/files from the command line */
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if (!justread) {
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for (i = optind; i < argc; i++) {
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struct stat stbuf;
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if (stat(argv[i], &stbuf) == -1) {
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warn("%s", argv[i]);
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rval = -1;
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} else if (strcmp(argv[i], "/usr/lib") == 0) {
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warnx("WARNING! '%s' can not be used", argv[i]);
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rval = -1;
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} else {
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/*
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* See if this is a directory-containing
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* file instead of a directory
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*/
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if (S_ISREG(stbuf.st_mode))
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rval |= dofile(argv[i], 0);
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else
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add_search_path(argv[i]);
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}
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}
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}
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for (i = 0; i < n_search_dirs; i++) {
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char *cp = concat(dir_list, *dir_list?":":"", search_dirs[i]);
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free(dir_list);
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dir_list = cp;
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}
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if (justread) {
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listhints();
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return 0;
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}
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for (i = 0; i < n_search_dirs; i++)
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rval |= dodir(search_dirs[i], 1);
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rval |= buildhints();
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return rval;
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}
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static void
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usage(void)
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{
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fprintf(stderr,
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"usage: ldconfig [-32] [-aout | -elf] [-Rimrsv] [-f hints_file] [directory | file ...]\n");
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exit(1);
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}
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int
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dofile(char *fname, int silent)
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{
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FILE *hfp;
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char buf[MAXPATHLEN];
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int rval = 0;
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char *cp, *sp;
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if ((hfp = fopen(fname, "r")) == NULL) {
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warn("%s", fname);
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return -1;
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}
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while (fgets(buf, sizeof(buf), hfp)) {
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cp = buf;
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while (isspace(*cp))
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cp++;
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if (*cp == '#' || *cp == '\0')
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continue;
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sp = cp;
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while (!isspace(*cp) && *cp != '\0')
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cp++;
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if (*cp != '\n') {
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*cp = '\0';
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warnx("%s: trailing characters ignored", sp);
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}
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*cp = '\0';
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rval |= dodir(sp, silent);
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}
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(void)fclose(hfp);
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return rval;
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}
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int
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dodir(char *dir, int silent)
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{
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DIR *dd;
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struct dirent *dp;
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char name[MAXPATHLEN];
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int dewey[MAXDEWEY], ndewey;
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if ((dd = opendir(dir)) == NULL) {
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if (silent && errno == ENOENT) /* Ignore the error */
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return 0;
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warn("%s", dir);
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return -1;
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}
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while ((dp = readdir(dd)) != NULL) {
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int n;
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char *cp;
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/* Check for `lib' prefix */
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if (dp->d_name[0] != 'l' ||
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dp->d_name[1] != 'i' ||
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dp->d_name[2] != 'b')
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continue;
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/* Copy the entry minus prefix */
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(void)strcpy(name, dp->d_name + 3);
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n = strlen(name);
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if (n < 4)
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continue;
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/* Find ".so." in name */
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for (cp = name + n - 4; cp > name; --cp) {
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if (cp[0] == '.' &&
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cp[1] == 's' &&
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cp[2] == 'o' &&
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cp[3] == '.')
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break;
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}
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if (cp <= name)
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continue;
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*cp = '\0';
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if (!isdigit(*(cp+4)))
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continue;
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bzero((caddr_t)dewey, sizeof(dewey));
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ndewey = getdewey(dewey, cp + 4);
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if (ndewey < 2)
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continue;
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enter(dir, dp->d_name, name, dewey, ndewey);
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}
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closedir(dd);
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return 0;
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}
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static void
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enter(char *dir, char *file, char *name, int dewey[], int ndewey)
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{
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struct shlib_list *shp;
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for (shp = shlib_head; shp; shp = shp->next) {
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if (strcmp(name, shp->name) != 0 || major != shp->major)
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continue;
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/* Name matches existing entry */
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if (cmpndewey(dewey, ndewey, shp->dewey, shp->ndewey) > 0) {
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/* Update this entry with higher versioned lib */
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if (verbose)
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printf("Updating lib%s.%d.%d to %s/%s\n",
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shp->name, shp->major, shp->minor,
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dir, file);
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free(shp->name);
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shp->name = strdup(name);
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free(shp->path);
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shp->path = concat(dir, "/", file);
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bcopy(dewey, shp->dewey, sizeof(shp->dewey));
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shp->ndewey = ndewey;
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}
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break;
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}
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if (shp)
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/* Name exists: older version or just updated */
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return;
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/* Allocate new list element */
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if (verbose)
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printf("Adding %s/%s\n", dir, file);
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shp = (struct shlib_list *)xmalloc(sizeof *shp);
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shp->name = strdup(name);
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shp->path = concat(dir, "/", file);
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bcopy(dewey, shp->dewey, sizeof(shp->dewey));
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shp->ndewey = ndewey;
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shp->next = NULL;
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*shlib_tail = shp;
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shlib_tail = &shp->next;
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}
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static int
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hinthash(char *cp, int vmajor)
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{
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int k = 0;
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while (*cp)
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k = (((k << 1) + (k >> 14)) ^ (*cp++)) & 0x3fff;
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k = (((k << 1) + (k >> 14)) ^ (vmajor*257)) & 0x3fff;
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return k;
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}
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int
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buildhints(void)
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{
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struct hints_header hdr;
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struct hints_bucket *blist;
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struct shlib_list *shp;
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char *strtab;
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int i, n, str_index = 0;
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int strtab_sz = 0; /* Total length of strings */
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int nhints = 0; /* Total number of hints */
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int fd;
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char *tmpfilename;
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for (shp = shlib_head; shp; shp = shp->next) {
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strtab_sz += 1 + strlen(shp->name);
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strtab_sz += 1 + strlen(shp->path);
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nhints++;
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}
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/* Fill hints file header */
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hdr.hh_magic = HH_MAGIC;
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hdr.hh_version = LD_HINTS_VERSION_2;
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hdr.hh_nbucket = 1 * nhints;
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n = hdr.hh_nbucket * sizeof(struct hints_bucket);
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hdr.hh_hashtab = sizeof(struct hints_header);
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hdr.hh_strtab = hdr.hh_hashtab + n;
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hdr.hh_dirlist = strtab_sz;
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strtab_sz += 1 + strlen(dir_list);
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hdr.hh_strtab_sz = strtab_sz;
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hdr.hh_ehints = hdr.hh_strtab + hdr.hh_strtab_sz;
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if (verbose)
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printf("Totals: entries %d, buckets %ld, string size %d\n",
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nhints, (long)hdr.hh_nbucket, strtab_sz);
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/* Allocate buckets and string table */
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blist = (struct hints_bucket *)xmalloc(n);
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bzero((char *)blist, n);
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for (i = 0; i < hdr.hh_nbucket; i++)
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/* Empty all buckets */
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blist[i].hi_next = -1;
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strtab = (char *)xmalloc(strtab_sz);
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/* Enter all */
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for (shp = shlib_head; shp; shp = shp->next) {
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struct hints_bucket *bp;
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bp = blist +
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(hinthash(shp->name, shp->major) % hdr.hh_nbucket);
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if (bp->hi_pathx) {
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int j;
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for (j = 0; j < hdr.hh_nbucket; j++) {
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if (blist[j].hi_pathx == 0)
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break;
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}
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if (j == hdr.hh_nbucket) {
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warnx("bummer!");
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return -1;
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}
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while (bp->hi_next != -1)
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bp = &blist[bp->hi_next];
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bp->hi_next = j;
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bp = blist + j;
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}
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/* Insert strings in string table */
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bp->hi_namex = str_index;
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strcpy(strtab + str_index, shp->name);
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str_index += 1 + strlen(shp->name);
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bp->hi_pathx = str_index;
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strcpy(strtab + str_index, shp->path);
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str_index += 1 + strlen(shp->path);
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/* Copy versions */
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bcopy(shp->dewey, bp->hi_dewey, sizeof(bp->hi_dewey));
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bp->hi_ndewey = shp->ndewey;
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}
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/* Copy search directories */
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strcpy(strtab + str_index, dir_list);
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str_index += 1 + strlen(dir_list);
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/* Sanity check */
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if (str_index != strtab_sz) {
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errx(1, "str_index(%d) != strtab_sz(%d)", str_index, strtab_sz);
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}
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tmpfilename = concat(hints_file, ".XXXXXXXXXX", "");
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umask(0); /* Create with exact permissions */
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if ((fd = mkstemp(tmpfilename)) == -1) {
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warn("%s", tmpfilename);
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return -1;
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}
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fchmod(fd, 0444);
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if (write(fd, &hdr, sizeof(struct hints_header)) !=
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sizeof(struct hints_header)) {
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warn("%s", hints_file);
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return -1;
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}
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if (write(fd, blist, hdr.hh_nbucket * sizeof(*blist)) !=
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(ssize_t)(hdr.hh_nbucket * sizeof(*blist))) {
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warn("%s", hints_file);
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return -1;
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}
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if (write(fd, strtab, strtab_sz) != strtab_sz) {
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warn("%s", hints_file);
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return -1;
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}
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if (close(fd) != 0) {
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warn("%s", hints_file);
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return -1;
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}
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/* Install it */
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if (unlink(hints_file) != 0 && errno != ENOENT) {
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warn("%s", hints_file);
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return -1;
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}
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if (rename(tmpfilename, hints_file) != 0) {
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warn("%s", hints_file);
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return -1;
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}
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return 0;
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}
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static int
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readhints(void)
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{
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int fd;
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void *addr;
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long fsize;
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long msize;
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struct hints_header *hdr;
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struct hints_bucket *blist;
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char *strtab;
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struct shlib_list *shp;
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int i;
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if ((fd = open(hints_file, O_RDONLY, 0)) == -1) {
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warn("%s", hints_file);
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return -1;
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}
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msize = PAGE_SIZE;
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addr = mmap(0, msize, PROT_READ, MAP_PRIVATE, fd, 0);
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if (addr == MAP_FAILED) {
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warn("%s", hints_file);
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return -1;
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}
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hdr = (struct hints_header *)addr;
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if (HH_BADMAG(*hdr)) {
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warnx("%s: bad magic: %lo", hints_file,
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(unsigned long)hdr->hh_magic);
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return -1;
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}
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if (hdr->hh_version != LD_HINTS_VERSION_1 &&
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hdr->hh_version != LD_HINTS_VERSION_2) {
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warnx("unsupported version: %ld", (long)hdr->hh_version);
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return -1;
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}
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|
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if (hdr->hh_ehints > msize) {
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fsize = hdr->hh_ehints;
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munmap(addr, msize);
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addr = mmap(0, fsize, PROT_READ, MAP_PRIVATE, fd, 0);
|
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if (addr == MAP_FAILED) {
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warn("%s", hints_file);
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return -1;
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}
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hdr = (struct hints_header *)addr;
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}
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close(fd);
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|
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strtab = (char *)addr + hdr->hh_strtab;
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|
|
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if (hdr->hh_version >= LD_HINTS_VERSION_2)
|
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add_search_path(strtab + hdr->hh_dirlist);
|
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else if (rescan)
|
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errx(1, "%s too old and does not contain the search path",
|
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hints_file);
|
|
|
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if (rescan)
|
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return 0;
|
|
|
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blist = malloc(sizeof(*blist) * hdr->hh_nbucket);
|
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if (blist == NULL)
|
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err(1, "readhints");
|
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memcpy(blist, (char *)addr + hdr->hh_hashtab,
|
|
sizeof(*blist) * hdr->hh_nbucket);
|
|
|
|
|
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for (i = 0; i < hdr->hh_nbucket; i++) {
|
|
struct hints_bucket *bp = &blist[i];
|
|
|
|
/* Sanity check */
|
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if (bp->hi_namex >= hdr->hh_strtab_sz) {
|
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warnx("bad name index: %#x", bp->hi_namex);
|
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free(blist);
|
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return -1;
|
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}
|
|
if (bp->hi_pathx >= hdr->hh_strtab_sz) {
|
|
warnx("bad path index: %#x", bp->hi_pathx);
|
|
free(blist);
|
|
return -1;
|
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}
|
|
|
|
/* Allocate new list element */
|
|
shp = (struct shlib_list *)xmalloc(sizeof *shp);
|
|
shp->name = strdup(strtab + bp->hi_namex);
|
|
shp->path = strdup(strtab + bp->hi_pathx);
|
|
bcopy(bp->hi_dewey, shp->dewey, sizeof(shp->dewey));
|
|
shp->ndewey = bp->hi_ndewey;
|
|
shp->next = NULL;
|
|
|
|
*shlib_tail = shp;
|
|
shlib_tail = &shp->next;
|
|
}
|
|
|
|
free(blist);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
listhints(void)
|
|
{
|
|
struct shlib_list *shp;
|
|
int i;
|
|
|
|
printf("%s:\n", hints_file);
|
|
printf("\tsearch directories: %s\n", dir_list);
|
|
|
|
for (i = 0, shp = shlib_head; shp; i++, shp = shp->next)
|
|
printf("\t%d:-l%s.%d.%d => %s\n",
|
|
i, shp->name, shp->major, shp->minor, shp->path);
|
|
|
|
return;
|
|
}
|