1 files changed, 521 insertions, 0 deletions

diff --git a/sbin/ldconfig/ldconfig.c b/sbin/ldconfig/ldconfig.c
new file mode 100644
index 0000000..1189d6d
--- /dev/null
+++ b/sbin/ldconfig/ldconfig.c
@@ -0,0 +1,521 @@
+/*
+ * Copyright (c) 1993,1995 Paul Kranenburg
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Paul Kranenburg.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *	$Id: ldconfig.c,v 1.15 1996/10/10 23:14:23 jdp Exp $
+ */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/file.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sys/resource.h>
+#include <dirent.h>
+#include <errno.h>
+#include <err.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <ar.h>
+#include <ranlib.h>
+#include <a.out.h>
+#include <stab.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <machine/param.h>
+
+#include <link.h>
+#include "shlib.h"
+#include "support.h"
+
+#if DEBUG
+/* test */
+#undef _PATH_LD_HINTS
+#define _PATH_LD_HINTS		"./ld.so.hints"
+#endif
+
+#undef major
+#undef minor
+
+extern char			*__progname;
+
+static int			verbose;
+static int			nostd;
+static int			justread;
+static int			merge;
+static char			*hints_file = _PATH_LD_HINTS;
+
+struct shlib_list {
+	/* Internal list of shared libraries found */
+	char			*name;
+	char			*path;
+	int			dewey[MAXDEWEY];
+	int			ndewey;
+#define major dewey[0]
+#define minor dewey[1]
+	struct shlib_list	*next;
+};
+
+static struct shlib_list	*shlib_head = NULL, **shlib_tail = &shlib_head;
+static char			*dir_list;
+
+static void	enter __P((char *, char *, char *, int *, int));
+static int	dodir __P((char *, int));
+static int	buildhints __P((void));
+static int	readhints __P((void));
+static void	listhints __P((void));
+
+int
+main(argc, argv)
+int	argc;
+char	*argv[];
+{
+	int		i, c;
+	int		rval = 0;
+
+	while ((c = getopt(argc, argv, "f:mrsv")) != EOF) {
+		switch (c) {
+		case 'f':
+			hints_file = optarg;
+			break;
+		case 'm':
+			merge = 1;
+			break;
+		case 'r':
+			justread = 1;
+			break;
+		case 's':
+			nostd = 1;
+			break;
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			errx(1, "Usage: %s [-mrsv] [-f hints_file] [dir ...]",
+				__progname);
+			break;
+		}
+	}
+
+	dir_list = strdup("");
+
+	if (justread || merge) {
+		if ((rval = readhints()) != 0)
+			return rval;
+	}
+
+	if (!nostd && !merge)
+		std_search_path();
+
+	if (!justread) {  /* Add any directories from the command line */
+		for (i = optind; i < argc; i++) {
+			if (access(argv[i], F_OK) == -1) {  /* Doesn't exist */
+				warn("%s", argv[i]);
+				rval = -1;
+			} else
+				add_search_path(argv[i]);
+		}
+	}
+
+	for (i = 0; i < n_search_dirs; i++) {
+		char *cp = concat(dir_list, *dir_list?":":"", search_dirs[i]);
+		free(dir_list);
+		dir_list = cp;
+	}
+
+	if (justread) {
+		listhints();
+		return 0;
+	}
+
+	for (i = 0; i < n_search_dirs; i++)
+		rval |= dodir(search_dirs[i], 1);
+
+	rval |= buildhints();
+
+	return rval;
+}
+
+int
+dodir(dir, silent)
+char	*dir;
+int	silent;
+{
+	DIR		*dd;
+	struct dirent	*dp;
+	char		name[MAXPATHLEN];
+	int		dewey[MAXDEWEY], ndewey;
+
+	if ((dd = opendir(dir)) == NULL) {
+		if (silent && errno == ENOENT)	/* Ignore the error */
+			return 0;
+		warn("%s", dir);
+		return -1;
+	}
+
+	while ((dp = readdir(dd)) != NULL) {
+		register int n;
+		register char *cp;
+
+		/* Check for `lib' prefix */
+		if (dp->d_name[0] != 'l' ||
+		    dp->d_name[1] != 'i' ||
+		    dp->d_name[2] != 'b')
+			continue;
+
+		/* Copy the entry minus prefix */
+		(void)strcpy(name, dp->d_name + 3);
+		n = strlen(name);
+		if (n < 4)
+			continue;
+
+		/* Find ".so." in name */
+		for (cp = name + n - 4; cp > name; --cp) {
+			if (cp[0] == '.' &&
+			    cp[1] == 's' &&
+			    cp[2] == 'o' &&
+			    cp[3] == '.')
+				break;
+		}
+		if (cp <= name)
+			continue;
+
+		*cp = '\0';
+		if (!isdigit(*(cp+4)))
+			continue;
+
+		bzero((caddr_t)dewey, sizeof(dewey));
+		ndewey = getdewey(dewey, cp + 4);
+		enter(dir, dp->d_name, name, dewey, ndewey);
+	}
+
+	return 0;
+}
+
+static void
+enter(dir, file, name, dewey, ndewey)
+char	*dir, *file, *name;
+int	dewey[], ndewey;
+{
+	struct shlib_list	*shp;
+
+	for (shp = shlib_head; shp; shp = shp->next) {
+		if (strcmp(name, shp->name) != 0 || major != shp->major)
+			continue;
+
+		/* Name matches existing entry */
+		if (cmpndewey(dewey, ndewey, shp->dewey, shp->ndewey) > 0) {
+
+			/* Update this entry with higher versioned lib */
+			if (verbose)
+				printf("Updating lib%s.%d.%d to %s/%s\n",
+					shp->name, shp->major, shp->minor,
+					dir, file);
+
+			free(shp->name);
+			shp->name = strdup(name);
+			free(shp->path);
+			shp->path = concat(dir, "/", file);
+			bcopy(dewey, shp->dewey, sizeof(shp->dewey));
+			shp->ndewey = ndewey;
+		}
+		break;
+	}
+
+	if (shp)
+		/* Name exists: older version or just updated */
+		return;
+
+	/* Allocate new list element */
+	if (verbose)
+		printf("Adding %s/%s\n", dir, file);
+
+	shp = (struct shlib_list *)xmalloc(sizeof *shp);
+	shp->name = strdup(name);
+	shp->path = concat(dir, "/", file);
+	bcopy(dewey, shp->dewey, MAXDEWEY);
+	shp->ndewey = ndewey;
+	shp->next = NULL;
+
+	*shlib_tail = shp;
+	shlib_tail = &shp->next;
+}
+
+
+int
+hinthash(cp, vmajor)
+char	*cp;
+int	vmajor;
+{
+	int	k = 0;
+
+	while (*cp)
+		k = (((k << 1) + (k >> 14)) ^ (*cp++)) & 0x3fff;
+
+	k = (((k << 1) + (k >> 14)) ^ (vmajor*257)) & 0x3fff;
+
+	return k;
+}
+
+int
+buildhints()
+{
+	struct hints_header	hdr;
+	struct hints_bucket	*blist;
+	struct shlib_list	*shp;
+	char			*strtab;
+	int			i, n, str_index = 0;
+	int			strtab_sz = 0;	/* Total length of strings */
+	int			nhints = 0;	/* Total number of hints */
+	int			fd;
+	char			*tmpfile;
+
+	for (shp = shlib_head; shp; shp = shp->next) {
+		strtab_sz += 1 + strlen(shp->name);
+		strtab_sz += 1 + strlen(shp->path);
+		nhints++;
+	}
+
+	/* Fill hints file header */
+	hdr.hh_magic = HH_MAGIC;
+	hdr.hh_version = LD_HINTS_VERSION_2;
+	hdr.hh_nbucket = 1 * nhints;
+	n = hdr.hh_nbucket * sizeof(struct hints_bucket);
+	hdr.hh_hashtab = sizeof(struct hints_header);
+	hdr.hh_strtab = hdr.hh_hashtab + n;
+	hdr.hh_dirlist = strtab_sz;
+	strtab_sz += 1 + strlen(dir_list);
+	hdr.hh_strtab_sz = strtab_sz;
+	hdr.hh_ehints = hdr.hh_strtab + hdr.hh_strtab_sz;
+
+	if (verbose)
+		printf("Totals: entries %d, buckets %ld, string size %d\n",
+					nhints, hdr.hh_nbucket, strtab_sz);
+
+	/* Allocate buckets and string table */
+	blist = (struct hints_bucket *)xmalloc(n);
+	bzero((char *)blist, n);
+	for (i = 0; i < hdr.hh_nbucket; i++)
+		/* Empty all buckets */
+		blist[i].hi_next = -1;
+
+	strtab = (char *)xmalloc(strtab_sz);
+
+	/* Enter all */
+	for (shp = shlib_head; shp; shp = shp->next) {
+		struct hints_bucket	*bp;
+
+		bp = blist +
+		  (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)
+					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, ".XXXXXX", "");
+	if ((tmpfile = mktemp(tmpfile)) == NULL) {
+		warn("%s", tmpfile);
+		return -1;
+	}
+
+	umask(0);	/* Create with exact permissions */
+	if ((fd = open(tmpfile, O_RDWR|O_CREAT|O_TRUNC, 0444)) == -1) {
+		warn("%s", hints_file);
+		return -1;
+	}
+
+	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;
+	caddr_t			addr;
+	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 == (caddr_t)-1) {
+		warn("%s", hints_file);
+		return -1;
+	}
+
+	hdr = (struct hints_header *)addr;
+	if (HH_BADMAG(*hdr)) {
+		warnx("%s: Bad magic: %o",
+			hints_file, hdr->hh_magic);
+		return -1;
+	}
+
+	if (hdr->hh_version != LD_HINTS_VERSION_1 &&
+	    hdr->hh_version != LD_HINTS_VERSION_2) {
+		warnx("Unsupported version: %d", hdr->hh_version);
+		return -1;
+	}
+
+	if (hdr->hh_ehints > msize) {
+		if (mmap(addr+msize, hdr->hh_ehints - msize,
+				PROT_READ, MAP_COPY|MAP_FIXED,
+				fd, msize) != (caddr_t)(addr+msize)) {
+
+			warn("%s", hints_file);
+			return -1;
+		}
+	}
+	close(fd);
+
+	blist = (struct hints_bucket *)(addr + hdr->hh_hashtab);
+	strtab = (char *)(addr + hdr->hh_strtab);
+
+	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;
+	}
+	if (hdr->hh_version >= LD_HINTS_VERSION_2)
+		add_search_path(strtab + hdr->hh_dirlist);
+
+	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;
+}