5e6220d9d0
longer includes machine/elf.h. * consumers of elf.h now use the minimalist elf header possible. This change is motivated by Binutils 2.11.0 and too much clashing over our base elf headers and the Binutils elf headers.
621 lines
13 KiB
C
621 lines
13 KiB
C
/*
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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 <link.h>
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#include <objformat.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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#undef major
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#undef minor
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|
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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 char *hints_file;
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|
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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 __P((void));
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static int dodir __P((char *, int));
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int dofile __P((char *, int));
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static void enter __P((char *, char *, char *, int *, int));
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static void listhints __P((void));
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static int readhints __P((void));
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static void usage __P((void));
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|
int
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main(argc, argv)
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int argc;
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|
char *argv[];
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{
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int i, c;
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int rval = 0;
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char objformat[32];
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int is_aout;
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if (getobjformat(objformat, sizeof objformat, &argc, argv) == -1)
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errx(1, "getobjformat failed: name too long");
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if (strcmp(objformat, "aout") == 0)
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is_aout = 1;
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else if (strcmp(objformat, "elf") == 0)
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is_aout = 0;
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else
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errx(1, "unknown object format \"%s\"", objformat);
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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()
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{
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fprintf(stderr,
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"usage: ldconfig [-aout | -elf] [-Rimrsv] [-f hints_file] [dir | file ...]\n");
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exit(1);
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}
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|
int
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dofile(fname, silent)
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char *fname;
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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(dir, silent)
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char *dir;
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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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register int n;
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register 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(dir, file, name, dewey, ndewey)
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char *dir, *file, *name;
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int dewey[], 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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|
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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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|
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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, MAXDEWEY);
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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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int
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hinthash(cp, vmajor)
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char *cp;
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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()
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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 *tmpfile;
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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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|
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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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|
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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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|
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|
strtab = (char *)xmalloc(strtab_sz);
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|
|
|
/* Enter all */
|
|
for (shp = shlib_head; shp; shp = shp->next) {
|
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struct hints_bucket *bp;
|
|
|
|
bp = blist +
|
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(hinthash(shp->name, shp->major) % hdr.hh_nbucket);
|
|
|
|
if (bp->hi_pathx) {
|
|
int i;
|
|
|
|
for (i = 0; i < hdr.hh_nbucket; i++) {
|
|
if (blist[i].hi_pathx == 0)
|
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break;
|
|
}
|
|
if (i == hdr.hh_nbucket) {
|
|
warnx("bummer!");
|
|
return -1;
|
|
}
|
|
while (bp->hi_next != -1)
|
|
bp = &blist[bp->hi_next];
|
|
bp->hi_next = i;
|
|
bp = blist + i;
|
|
}
|
|
|
|
/* Insert strings in string table */
|
|
bp->hi_namex = str_index;
|
|
strcpy(strtab + str_index, shp->name);
|
|
str_index += 1 + strlen(shp->name);
|
|
|
|
bp->hi_pathx = str_index;
|
|
strcpy(strtab + str_index, shp->path);
|
|
str_index += 1 + strlen(shp->path);
|
|
|
|
/* Copy versions */
|
|
bcopy(shp->dewey, bp->hi_dewey, sizeof(bp->hi_dewey));
|
|
bp->hi_ndewey = shp->ndewey;
|
|
}
|
|
|
|
/* Copy search directories */
|
|
strcpy(strtab + str_index, dir_list);
|
|
str_index += 1 + strlen(dir_list);
|
|
|
|
/* Sanity check */
|
|
if (str_index != strtab_sz) {
|
|
errx(1, "str_index(%d) != strtab_sz(%d)", str_index, strtab_sz);
|
|
}
|
|
|
|
tmpfile = concat(hints_file, ".XXXXXXXXXX", "");
|
|
umask(0); /* Create with exact permissions */
|
|
if ((fd = mkstemp(tmpfile)) == -1) {
|
|
warn("%s", tmpfile);
|
|
return -1;
|
|
}
|
|
fchmod(fd, 0444);
|
|
|
|
if (write(fd, &hdr, sizeof(struct hints_header)) !=
|
|
sizeof(struct hints_header)) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
if (write(fd, blist, hdr.hh_nbucket * sizeof(struct hints_bucket)) !=
|
|
hdr.hh_nbucket * sizeof(struct hints_bucket)) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
if (write(fd, strtab, strtab_sz) != strtab_sz) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
if (close(fd) != 0) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
|
|
/* Install it */
|
|
if (unlink(hints_file) != 0 && errno != ENOENT) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
|
|
if (rename(tmpfile, hints_file) != 0) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
readhints()
|
|
{
|
|
int fd;
|
|
void *addr;
|
|
long fsize;
|
|
long msize;
|
|
struct hints_header *hdr;
|
|
struct hints_bucket *blist;
|
|
char *strtab;
|
|
struct shlib_list *shp;
|
|
int i;
|
|
|
|
if ((fd = open(hints_file, O_RDONLY, 0)) == -1) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
|
|
msize = PAGE_SIZE;
|
|
addr = mmap(0, msize, PROT_READ, MAP_COPY, fd, 0);
|
|
|
|
if (addr == MAP_FAILED) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
|
|
hdr = (struct hints_header *)addr;
|
|
if (HH_BADMAG(*hdr)) {
|
|
warnx("%s: bad magic: %lo", hints_file,
|
|
(unsigned long)hdr->hh_magic);
|
|
return -1;
|
|
}
|
|
|
|
if (hdr->hh_version != LD_HINTS_VERSION_1 &&
|
|
hdr->hh_version != LD_HINTS_VERSION_2) {
|
|
warnx("unsupported version: %ld", (long)hdr->hh_version);
|
|
return -1;
|
|
}
|
|
|
|
if (hdr->hh_ehints > msize) {
|
|
fsize = hdr->hh_ehints;
|
|
munmap(addr, msize);
|
|
addr = mmap(0, fsize, PROT_READ, MAP_COPY, fd, 0);
|
|
if (addr == MAP_FAILED) {
|
|
warn("%s", hints_file);
|
|
return -1;
|
|
}
|
|
hdr = (struct hints_header *)addr;
|
|
}
|
|
close(fd);
|
|
|
|
blist = (struct hints_bucket *)(addr + hdr->hh_hashtab);
|
|
strtab = (char *)(addr + hdr->hh_strtab);
|
|
|
|
if (hdr->hh_version >= LD_HINTS_VERSION_2)
|
|
add_search_path(strtab + hdr->hh_dirlist);
|
|
else if (rescan)
|
|
errx(1, "%s too old and does not contain the search path",
|
|
hints_file);
|
|
|
|
if (rescan)
|
|
return 0;
|
|
|
|
for (i = 0; i < hdr->hh_nbucket; i++) {
|
|
struct hints_bucket *bp = &blist[i];
|
|
|
|
/* Sanity check */
|
|
if (bp->hi_namex >= hdr->hh_strtab_sz) {
|
|
warnx("bad name index: %#x", bp->hi_namex);
|
|
return -1;
|
|
}
|
|
if (bp->hi_pathx >= hdr->hh_strtab_sz) {
|
|
warnx("bad path index: %#x", bp->hi_pathx);
|
|
return -1;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
listhints()
|
|
{
|
|
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;
|
|
}
|