Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ldconfig(8) now lives in `src/sbin/ldconfig'

Browse Source
This commit is contained in:
pk 1998-12-17 11:47:20 +00:00
parent d2db1ca59a
commit cec94710e3
3 changed files with 0 additions and 739 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
gnu/usr.bin/ld/ldconfig/Makefile
View File

@ -1,19 +0,0 @@
# $NetBSD: Makefile,v 1.13 1998/03/02 19:46:44 cgd Exp $
.include <bsd.own.mk>
.if (${MACHINE_ARCH} == "i386") || \
(${MACHINE_ARCH} == "m68k") || \
(${MACHINE_ARCH} == "ns32k") || \
(${MACHINE_ARCH} == "sparc") || \
(${MACHINE_ARCH} == "vax") || \
(${MACHINE_ARCH} == "arm32")
PROG= ldconfig
SRCS= ldconfig.c shlib.c etc.c
LDSTATIC?=-static
BINDIR= /sbin
.endif
MAN= ldconfig.8
.include <bsd.prog.mk>

151
gnu/usr.bin/ld/ldconfig/ldconfig.8
View File

@ -1,151 +0,0 @@
.\" $NetBSD: ldconfig.8,v 1.9 1998/09/05 13:08:40 pk Exp $
.\"
.\" Copyright (c) 1998 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Paul Kranenburg.
.\"
.\" 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 the NetBSD
.\" Foundation, Inc. and its contributors.
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
.\" contributors may be used to endorse or promote products derived
.\" from this software without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
.\" ``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 FOUNDATION OR CONTRIBUTORS
.\" 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.
.\"
.Dd August 24, 1997
.Dt LDCONFIG 8
.Os NetBSD
.Sh NAME
.Nm ldconfig
.Nd configure the shared library cache
.Sh SYNOPSIS
.Nm ldconfig
.Op Fl cmrsSv
.Op Ar directory Ar ...
.Sh DESCRIPTION
.Nm
is used to prepare a set of
.Dq hints
for use by the run-time linker
.Nm ld.so
to facilitate quick lookup of shared libraries available in multiple
directories. By default, it scans a set of built-in system directories,
directories listed in
.Pa /etc/ld.so.conf ,
and any
.Ar directories
specified on the command line (in the given order) looking for shared
libraries and stores the results in the file
.Pa /var/run/ld.so.hints
to forestall the overhead that would otherwise result from the
directory search operations
.Nm ld.so
would have to perform to load required shared libraries.
.Pp
The shared libraries so found will be automatically available for loading
if needed by the program being prepared for execution. This obviates the need
for storing search paths within the executable.
.Pp
The
.Ev LD_LIBRARY_PATH
environment variable can be used to override the use of
directories (or the order thereof) from the cache or to specify additional
directories where shared libraries might be found.
.Ev LD_LIBRARY_PATH
is a
.Sq \:
separated list of directory paths that are searched by
.Nm ld.so
when it needs to load a shared library. It can be viewed as the run-time
equivalent of the
.Fl L
switch of
.Nm ld .
.Pp
.Nm
is typically run as part of the boot sequence.
.Pp
The following options are recognized by
.Nm ldconfig :
.Bl -tag -width indent
.It Fl c
Do not scan directories listed in
.Pa /etc/ld.so.conf
for shared libraries.
.It Fl m
Merge the result of the scan of the directories given as arguments into
the existing hints file. The default action is to build the hints file afresh.
.It Fl r
Lists the current contents of
.Pa ld.so.hints
on the standard output. The hints file will not be modified.
.It Fl s
Do not scan the built-in system directory
.Pq Dq /usr/lib ,
nor any directories listed in
.Pa /etc/ld.so.conf
for shared libraries.
.It Fl S
Do not scan the built-in system directory
.Pq Dq /usr/lib ,
for shared libraries. (Directories listed in
.Pa /etc/ld.so.conf
are still scanned.)
.It Fl v
Switch on verbose mode.
.Sh Security
Special care must be taken when loading shared libraries into the address
space of
.Ev set-user-ID
programs. Whenever such a program is run,
.Nm ld.so
will only load shared libraries from the
.Pa ld.so.hints
file. In particular, the
.Ev LD_LIBRARY_PATH
is not used to search for libraries. Thus, the role of ldconfig is dual. In
addition to building a set of hints for quick lookup, it also serves to
specify the trusted collection of directories from which shared objects can
be safely loaded. It is presumed that the set of directories specified to
.Nm
is under control of the system's administrator.
.Nm ld.so
further assists set-user-ID programs by erasing the
.Ev LD_LIBRARY_PATH
from the environment.
.Sh FILES
.Pa /var/run/ld.so.hints ,
.Pa /etc/ld.so.conf
.Sh SEE ALSO
.Xr ld 1 ,
.Xr ld.so 1 ,
.Xr ld.so.conf 5 ,
.Xr link 5
.Sh HISTORY
A
.Nm
utility first appeared in SunOS 4.0, it appeared in its current form
in NetBSD 0.9a.

569
gnu/usr.bin/ld/ldconfig/ldconfig.c
View File

@ -1,569 +0,0 @@
/* $NetBSD: ldconfig.c,v 1.21 1998/12/15 22:27:14 pk Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Paul Kranenburg.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
#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 <ctype.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <link.h>
#include "ld.h"
#define _PATH_LD_SO_CONF "/etc/ld.so.conf"
#undef major
#undef minor
extern char *__progname;
static int verbose;
static int nostd;
static int noconf;
static int justread;
static int merge;
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, int));
static int do_conf __P((void));
static int buildhints __P((void));
static int readhints __P((void));
static void listhints __P((void));
static int hinthash __P((char *, int, int));
int main __P((int, char *[]));
int
main(argc, argv)
int argc;
char *argv[];
{
int i, c;
int rval = 0;
while ((c = getopt(argc, argv, "cmrsSv")) != -1) {
switch (c) {
case 'c':
noconf = 1;
break;
case 'm':
merge = 1;
break;
case 'r':
justread = 1;
break;
case 's':
nostd = 1;
noconf = 1;
break;
case 'S':
nostd = 1;
break;
case 'v':
verbose = 1;
break;
default:
errx(1, "Usage: %s [-c][-m][-r][-s][-S][-v][dir ...]",
__progname);
break;
}
}
dir_list = xmalloc(1);
*dir_list = '\0';
if (justread || merge) {
if ((rval = readhints()) != 0)
return (rval);
if (justread) {
listhints();
return (rval);
}
}
if (!nostd && !merge)
std_search_path();
for (i = 0; i < n_search_dirs; i++)
rval |= dodir(search_dirs[i], 1, 0);
if (!noconf && !merge)
rval |= do_conf();
for (i = optind; i < argc; i++) {
rval |= dodir(argv[i], 0, 1);
}
rval |= buildhints();
return (rval);
}
int
do_conf ()
{
FILE *conf;
char *line, *c;
char *cline = NULL;
size_t len;
int rval = 0;
if ((conf = fopen(_PATH_LD_SO_CONF, "r")) == NULL)
return (-1);
while ((line = fgetln(conf, &len)) != NULL) {
if (*line == '#' || *line == '\n')
continue;
if (line[len-1] == '\n') {
line[--len] = '\0';
} else {
cline = xmalloc(len+1);
bcopy(line, cline, len);
line = cline;
line[len] = '\0';
}
while (isblank(*line)) { line++; len--; }
if ((c = strchr(line, '#')) == NULL)
c = line + len;
while (--c >= line && isblank(*c)) continue;
if (c >= line) {
*++c = '\0';
rval |= dodir(line, 0, 1);
}
if (cline) {
free(cline);
cline = NULL;
}
}
return (rval);
}
int
dodir(dir, silent, update_dir_list)
char *dir;
int silent;
int update_dir_list;
{
DIR *dd;
struct dirent *dp;
char name[MAXPATHLEN];
int dewey[MAXDEWEY], ndewey;
if ((dd = opendir(dir)) == NULL) {
if (!silent || errno != ENOENT)
warn("%s", dir);
return (-1);
}
if (update_dir_list) {
/* Check for duplicates? */
char *cp = concat(dir_list, *dir_list?":":"", dir);
free(dir_list);
dir_list = cp;
}
while ((dp = readdir(dd)) != NULL) {
int n;
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;
}
#if DEBUG
/* test */
#undef _PATH_LD_HINTS
#define _PATH_LD_HINTS "./ld.so.hints"
#endif
/* XXX - should be a common function with rtld.c */
int
hinthash(cp, vmajor, vminor)
char *cp;
int vmajor, vminor;
{
int k = 0;
while (*cp)
k = (((k << 1) + (k >> 14)) ^ (*cp++)) & 0x3fff;
k = (((k << 1) + (k >> 14)) ^ (vmajor*257)) & 0x3fff;
#if 0
k = (((k << 1) + (k >> 14)) ^ (vminor*167)) & 0x3fff;
#endif
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, shp->minor) % 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(_PATH_LD_HINTS, ".XXXXXX", "");
if ((fd = mkstemp(tmpfile)) == -1) {
warn("%s", tmpfile);
return (-1);
}
if (write(fd, &hdr, sizeof(struct hints_header)) !=
sizeof(struct hints_header)) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
if (write(fd, blist, hdr.hh_nbucket * sizeof(struct hints_bucket)) !=
hdr.hh_nbucket * sizeof(struct hints_bucket)) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
if (write(fd, strtab, strtab_sz) != strtab_sz) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
if (fchmod(fd, 0444) == -1) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
if (close(fd) != 0) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
/* Install it */
if (unlink(_PATH_LD_HINTS) != 0 && errno != ENOENT) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
if (rename(tmpfile, _PATH_LD_HINTS) != 0) {
warn("%s", _PATH_LD_HINTS);
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(_PATH_LD_HINTS, O_RDONLY, 0)) == -1) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
msize = getpagesize();
addr = mmap(0, msize, PROT_READ, MAP_FILE|MAP_COPY, fd, 0);
if (addr == (caddr_t)-1) {
warn("%s", _PATH_LD_HINTS);
return (-1);
}
hdr = (struct hints_header *)addr;
if (HH_BADMAG(*hdr)) {
warnx("%s: Bad magic: %lo",
_PATH_LD_HINTS, hdr->hh_magic);
return (-1);
}
if (hdr->hh_version != LD_HINTS_VERSION_2) {
warnx("Unsupported version: %ld", hdr->hh_version);
return (-1);
}
if (hdr->hh_ehints > msize) {
if (mmap(addr+msize, hdr->hh_ehints - msize,
PROT_READ, MAP_FILE|MAP_COPY|MAP_FIXED,
fd, msize) != (caddr_t)(addr+msize)) {
warn("%s", _PATH_LD_HINTS);
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;
}
dir_list = strdup(strtab + hdr->hh_dirlist);
return (0);
}
static void
listhints()
{
struct shlib_list *shp;
int i;
printf("%s:\n", _PATH_LD_HINTS);
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;
}