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glibc/elf/ldconfig.c
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/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Andreas Jaeger <aj@suse.de>, 1999. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Library General Public License as | |
published by the Free Software Foundation; either version 2 of the | |
License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Library General Public License for more details. | |
You should have received a copy of the GNU Library General Public | |
License along with the GNU C Library; see the file COPYING.LIB. If not, | |
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
Boston, MA 02111-1307, USA. */ | |
#include <alloca.h> | |
#include <argp.h> | |
#include <dirent.h> | |
#include <elf.h> | |
#include <error.h> | |
#include <errno.h> | |
#include <libintl.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#include <unistd.h> | |
#include <stdint.h> | |
#include <sys/fcntl.h> | |
#include <sys/mman.h> | |
#include <sys/stat.h> | |
#include <sys/types.h> | |
#include "ldconfig.h" | |
#include "dl-cache.h" | |
/* We don't need this here - silence the compiler. */ | |
#define _dl_sysdep_message(string, args...) do {} while (0); | |
#include "dl-procinfo.h" | |
#ifndef LD_SO_CONF | |
# define LD_SO_CONF SYSCONFDIR "/ld.so.conf" | |
#endif | |
/* Get libc version number. */ | |
#include <version.h> | |
#define PACKAGE _libc_intl_domainname | |
struct lib_entry | |
{ | |
int flags; | |
uint64_t hwcap; | |
char *lib; | |
char *path; | |
}; | |
static const struct | |
{ | |
const char *name; | |
int flag; | |
} lib_types [] = | |
{ | |
{"libc4", FLAG_LIBC4}, | |
{"libc5", FLAG_ELF_LIBC5}, | |
{"libc6", FLAG_ELF_LIBC6}, | |
{"glibc2", FLAG_ELF_LIBC6} | |
}; | |
/* List of directories to handle. */ | |
struct dir_entry | |
{ | |
char *path; | |
int flag; | |
struct dir_entry *next; | |
}; | |
/* The list is unsorted, contains no duplicates. Entries are added at | |
the end. */ | |
static struct dir_entry *dir_entries; | |
/* Flags for different options. */ | |
/* Print Cache. */ | |
static int opt_print_cache = 0; | |
/* Be verbose. */ | |
int opt_verbose = 0; | |
/* Format to support. */ | |
/* 0: only libc5/glibc2; 1: both; 2: only glibc 2.2. */ | |
int opt_format = 1; | |
/* Build cache. */ | |
static int opt_build_cache = 1; | |
/* Generate links. */ | |
static int opt_link = 1; | |
/* Only process directories specified on the command line. */ | |
static int opt_only_cline = 0; | |
/* Path to root for chroot. */ | |
static char *opt_chroot; | |
/* Manually link given shared libraries. */ | |
static int opt_manual_link = 0; | |
/* Cache file to use. */ | |
static char *cache_file; | |
/* Configuration file. */ | |
static const char *config_file; | |
/* Name and version of program. */ | |
static void print_version (FILE *stream, struct argp_state *state); | |
void (*argp_program_version_hook) (FILE *, struct argp_state *) | |
= print_version; | |
/* Definitions of arguments for argp functions. */ | |
static const struct argp_option options[] = | |
{ | |
{ "print-cache", 'p', NULL, 0, N_("Print cache"), 0}, | |
{ "verbose", 'v', NULL, 0, N_("Generate verbose messages"), 0}, | |
{ NULL, 'N', NULL, 0, N_("Don't build cache"), 0}, | |
{ NULL, 'X', NULL, 0, N_("Don't generate links"), 0}, | |
{ NULL, 'r', "ROOT", 0, N_("Change to and use ROOT as root directory"), 0}, | |
{ NULL, 'C', "CACHE", 0, N_("Use CACHE as cache file"), 0}, | |
{ NULL, 'f', "CONF", 0, N_("Use CONF as configuration file"), 0}, | |
{ NULL, 'n', NULL, 0, N_("Only process directories specified on the command line. Don't build cache."), 0}, | |
{ NULL, 'l', NULL, 0, N_("Manually link individual libraries."), 0}, | |
{ "format", 'c', "FORMAT", 0, N_("Format to use: new, old or compat (default)"), 0}, | |
{ NULL, 0, NULL, 0, NULL, 0 } | |
}; | |
/* Short description of program. */ | |
static const char doc[] = N_("Configure Dynamic Linker Run Time Bindings."); | |
/* Prototype for option handler. */ | |
static error_t parse_opt (int key, char *arg, struct argp_state *state); | |
/* Data structure to communicate with argp functions. */ | |
static struct argp argp = | |
{ | |
options, parse_opt, NULL, doc, NULL, NULL, NULL | |
}; | |
/* Check if string corresponds to an important hardware capability or | |
a platform. */ | |
static int | |
is_hwcap_platform (const char *name) | |
{ | |
int hwcap_idx = _dl_string_hwcap (name); | |
if (hwcap_idx != -1 && ((1 << hwcap_idx) & HWCAP_IMPORTANT)) | |
return 1; | |
hwcap_idx = _dl_string_platform (name); | |
if (hwcap_idx != -1) | |
return 1; | |
return 0; | |
} | |
/* Get hwcap (including platform) encoding of path. */ | |
static uint64_t | |
path_hwcap (const char *path) | |
{ | |
char *str = xstrdup (path); | |
char *ptr; | |
uint64_t hwcap = 0; | |
uint64_t h; | |
size_t len; | |
len = strlen (str); | |
if (str[len] == '/') | |
str[len] = '\0'; | |
/* Search pathname from the end and check for hwcap strings. */ | |
for (;;) | |
{ | |
ptr = strrchr (str, '/'); | |
if (ptr == NULL) | |
break; | |
h = _dl_string_hwcap (ptr + 1); | |
if (h == (uint64_t) -1) | |
{ | |
h = _dl_string_platform (ptr + 1); | |
if (h == (uint64_t) -1) | |
break; | |
} | |
hwcap += 1ULL << h; | |
/* Search the next part of the path. */ | |
*ptr = '\0'; | |
} | |
free (str); | |
return hwcap; | |
} | |
/* Handle program arguments. */ | |
static error_t | |
parse_opt (int key, char *arg, struct argp_state *state) | |
{ | |
switch (key) | |
{ | |
case 'C': | |
cache_file = arg; | |
break; | |
case 'f': | |
config_file = arg; | |
break; | |
case 'l': | |
opt_manual_link = 1; | |
break; | |
case 'N': | |
opt_build_cache = 0; | |
break; | |
case 'n': | |
opt_build_cache = 0; | |
opt_only_cline = 1; | |
break; | |
case 'p': | |
opt_print_cache = 1; | |
break; | |
case 'r': | |
opt_chroot = arg; | |
break; | |
case 'v': | |
opt_verbose = 1; | |
break; | |
case 'X': | |
opt_link = 0; | |
break; | |
case 'c': | |
if (strcmp (arg, "old") == 0) | |
opt_format = 0; | |
else if (strcmp (arg, "compat") == 0) | |
opt_format = 1; | |
else if (strcmp (arg, "new") == 0) | |
opt_format = 2; | |
break; | |
default: | |
return ARGP_ERR_UNKNOWN; | |
} | |
return 0; | |
} | |
/* Print the version information. */ | |
static void | |
print_version (FILE *stream, struct argp_state *state) | |
{ | |
fprintf (stream, "ldconfig (GNU %s) %s\n", PACKAGE, VERSION); | |
fprintf (stream, gettext ("\ | |
Copyright (C) %s Free Software Foundation, Inc.\n\ | |
This is free software; see the source for copying conditions. There is NO\n\ | |
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\ | |
"), "2000"); | |
fprintf (stream, gettext ("Written by %s.\n"), | |
"Andreas Jaeger"); | |
} | |
/* Add a single directory entry. */ | |
static void | |
add_single_dir (struct dir_entry *entry, int verbose) | |
{ | |
struct dir_entry *ptr, *prev; | |
ptr = dir_entries; | |
prev = ptr; | |
while (ptr != NULL) | |
{ | |
/* Check for duplicates. */ | |
if (strcmp (ptr->path, entry->path) == 0) | |
{ | |
if (opt_verbose && verbose) | |
error (0, 0, _("Path `%s' given more than once"), entry->path); | |
/* Use the newer information. */ | |
ptr->flag = entry->flag; | |
free (entry); | |
break; | |
} | |
prev = ptr; | |
ptr = ptr->next; | |
} | |
/* Is this the first entry? */ | |
if (ptr == NULL && dir_entries == NULL) | |
dir_entries = entry; | |
else if (ptr == NULL) | |
prev->next = entry; | |
} | |
/* Add one directory to the list of directories to process. */ | |
static void | |
add_dir (const char *line) | |
{ | |
char *equal_sign; | |
struct dir_entry *entry; | |
unsigned int i; | |
entry = xmalloc (sizeof (struct dir_entry)); | |
entry->next = NULL; | |
/* Search for an '=' sign. */ | |
entry->path = xstrdup (line); | |
equal_sign = strchr (entry->path, '='); | |
if (equal_sign) | |
{ | |
*equal_sign = '\0'; | |
++equal_sign; | |
entry->flag = FLAG_ANY; | |
for (i = 0; i < sizeof (lib_types) / sizeof (lib_types [0]); ++i) | |
if (strcmp (equal_sign, lib_types[i].name) == 0) | |
{ | |
entry->flag = lib_types[i].flag; | |
break; | |
} | |
if (entry->flag == FLAG_ANY) | |
error (0, 0, _("%s is not a known library type"), equal_sign); | |
} | |
else | |
{ | |
entry->flag = FLAG_ANY; | |
} | |
/* Canonify path: for now only remove trailing slashes. */ | |
i = strlen (entry->path) - 1; | |
while (entry->path[i] == '/' && i > 0) | |
{ | |
entry->path [i] = '\0'; | |
--i; | |
} | |
add_single_dir (entry, 1); | |
} | |
static int | |
chroot_stat (const char *real_path, const char *path, struct stat64 *st) | |
{ | |
int ret; | |
char *canon_path; | |
if (!opt_chroot) | |
return stat64 (real_path, st); | |
ret = lstat64 (real_path, st); | |
if (ret || !S_ISLNK (st->st_mode)) | |
return ret; | |
canon_path = chroot_canon (opt_chroot, path); | |
if (canon_path == NULL) | |
return -1; | |
ret = stat64 (canon_path, st); | |
free (canon_path); | |
return ret; | |
} | |
/* Create a symbolic link from soname to libname in directory path. */ | |
static void | |
create_links (const char *real_path, const char *path, const char *libname, | |
const char *soname) | |
{ | |
char *full_libname, *full_soname; | |
char *real_full_libname, *real_full_soname; | |
struct stat64 stat_lib, stat_so, lstat_so; | |
int do_link = 1; | |
int do_remove = 1; | |
/* XXX: The logics in this function should be simplified. */ | |
/* Get complete path. */ | |
full_libname = alloca (strlen (path) + strlen (libname) + 2); | |
full_soname = alloca (strlen (path) + strlen (soname) + 2); | |
sprintf (full_libname, "%s/%s", path, libname); | |
sprintf (full_soname, "%s/%s", path, soname); | |
if (opt_chroot) | |
{ | |
real_full_libname = alloca (strlen (real_path) + strlen (libname) + 2); | |
real_full_soname = alloca (strlen (real_path) + strlen (soname) + 2); | |
sprintf (real_full_libname, "%s/%s", real_path, libname); | |
sprintf (real_full_soname, "%s/%s", real_path, soname); | |
} | |
else | |
{ | |
real_full_libname = full_libname; | |
real_full_soname = full_soname; | |
} | |
/* Does soname already exist and point to the right library? */ | |
if (chroot_stat (real_full_soname, full_soname, &stat_so) == 0) | |
{ | |
if (chroot_stat (real_full_libname, full_libname, &stat_lib)) | |
{ | |
error (0, 0, _("Can't stat %s\n"), full_libname); | |
return; | |
} | |
if (stat_lib.st_dev == stat_so.st_dev | |
&& stat_lib.st_ino == stat_so.st_ino) | |
/* Link is already correct. */ | |
do_link = 0; | |
else if (lstat64 (full_soname, &lstat_so) == 0 | |
&& !S_ISLNK (lstat_so.st_mode)) | |
{ | |
error (0, 0, _("%s is not a symbolic link\n"), full_soname); | |
do_link = 0; | |
do_remove = 0; | |
} | |
} | |
else if (lstat64 (real_full_soname, &lstat_so) != 0 | |
|| !S_ISLNK (lstat_so.st_mode)) | |
/* Unless it is a stale symlink, there is no need to remove. */ | |
do_remove = 0; | |
if (opt_verbose) | |
printf ("\t%s -> %s", soname, libname); | |
if (do_link && opt_link) | |
{ | |
/* Remove old link. */ | |
if (do_remove) | |
if (unlink (real_full_soname)) | |
{ | |
error (0, 0, _("Can't unlink %s"), full_soname); | |
do_link = 0; | |
} | |
/* Create symbolic link. */ | |
if (do_link && symlink (libname, real_full_soname)) | |
{ | |
error (0, 0, _("Can't link %s to %s"), full_soname, libname); | |
do_link = 0; | |
} | |
if (opt_verbose) | |
{ | |
if (do_link) | |
fputs (_(" (changed)\n"), stdout); | |
else | |
fputs (_(" (SKIPPED)\n"), stdout); | |
} | |
} | |
else if (opt_verbose) | |
fputs ("\n", stdout); | |
} | |
/* Manually link the given library. */ | |
static void | |
manual_link (char *library) | |
{ | |
char *path; | |
char *real_path; | |
char *real_library; | |
char *libname; | |
char *soname; | |
struct stat64 stat_buf; | |
int flag; | |
/* Prepare arguments for create_links call. Split library name in | |
directory and filename first. Since path is allocated, we've got | |
to be careful to free at the end. */ | |
path = xstrdup (library); | |
libname = strrchr (path, '/'); | |
if (libname) | |
{ | |
/* Successfully split names. Check if path is just "/" to avoid | |
an empty path. */ | |
if (libname == path) | |
{ | |
libname = library + 1; | |
path = xrealloc (path, 2); | |
strcpy (path, "/"); | |
} | |
else | |
{ | |
*libname = '\0'; | |
++libname; | |
} | |
} | |
else | |
{ | |
/* There's no path, construct one. */ | |
libname = library; | |
path = xrealloc (path, 2); | |
strcpy (path, "."); | |
} | |
if (opt_chroot) | |
{ | |
real_path = chroot_canon (opt_chroot, path); | |
if (real_path == NULL) | |
{ | |
error (0, errno, _("Can't find %s"), path); | |
free (path); | |
return; | |
} | |
real_library = alloca (strlen (real_path) + strlen (libname) + 2); | |
sprintf (real_library, "%s/%s", real_path, libname); | |
} | |
else | |
{ | |
real_path = path; | |
real_library = library; | |
} | |
/* Do some sanity checks first. */ | |
if (lstat64 (real_library, &stat_buf)) | |
{ | |
error (0, errno, _("Can't lstat %s"), library); | |
free (path); | |
return; | |
} | |
/* We don't want links here! */ | |
else if (!S_ISREG (stat_buf.st_mode)) | |
{ | |
error (0, 0, _("Ignored file %s since it is not a regular file."), | |
library); | |
free (path); | |
return; | |
} | |
if (process_file (real_library, library, libname, &flag, &soname, 0)) | |
{ | |
error (0, 0, _("No link created since soname could not be found for %s"), | |
library); | |
free (path); | |
return; | |
} | |
create_links (real_path, path, libname, soname); | |
free (soname); | |
free (path); | |
} | |
/* Read a whole directory and search for libraries. | |
The purpose is two-fold: | |
- search for libraries which will be added to the cache | |
- create symbolic links to the soname for each library | |
This has to be done separatly for each directory. | |
To keep track of which libraries to add to the cache and which | |
links to create, we save a list of all libraries. | |
The algorithm is basically: | |
for all libraries in the directory do | |
get soname of library | |
if soname is already in list | |
if new library is newer, replace entry | |
otherwise ignore this library | |
otherwise add library to list | |
For example, if the two libraries libxy.so.1.1 and libxy.so.1.2 | |
exist and both have the same soname, e.g. libxy.so, a symbolic link | |
is created from libxy.so.1.2 (the newer one) to libxy.so. | |
libxy.so.1.2 and libxy.so are added to the cache - but not | |
libxy.so.1.1. */ | |
/* Information for one library. */ | |
struct dlib_entry | |
{ | |
char *name; | |
char *soname; | |
int flag; | |
int is_link; | |
struct dlib_entry *next; | |
}; | |
static void | |
search_dir (const struct dir_entry *entry) | |
{ | |
DIR *dir; | |
struct dirent *direntry; | |
char *file_name, *dir_name, *real_file_name, *real_name; | |
int file_name_len, real_file_name_len, len; | |
char *soname; | |
struct dlib_entry *dlibs; | |
struct dlib_entry *dlib_ptr; | |
struct stat64 stat_buf; | |
int is_link; | |
uint64_t hwcap = path_hwcap (entry->path); | |
file_name_len = PATH_MAX; | |
file_name = alloca (file_name_len); | |
dlibs = NULL; | |
if (opt_verbose) | |
{ | |
if (hwcap != 0) | |
printf ("%s: (hwcap: 0x%Lx)\n", entry->path, hwcap); | |
else | |
printf ("%s:\n", entry->path); | |
} | |
if (opt_chroot) | |
{ | |
dir_name = chroot_canon (opt_chroot, entry->path); | |
real_file_name_len = PATH_MAX; | |
real_file_name = alloca (real_file_name_len); | |
} | |
else | |
{ | |
dir_name = entry->path; | |
real_file_name_len = 0; | |
real_file_name = file_name; | |
} | |
if (dir_name == NULL || (dir = opendir (dir_name)) == NULL) | |
{ | |
if (opt_verbose) | |
error (0, errno, _("Can't open directory %s"), entry->path); | |
if (opt_chroot && dir_name) | |
free (dir_name); | |
return; | |
} | |
while ((direntry = readdir (dir)) != NULL) | |
{ | |
int flag; | |
#ifdef _DIRENT_HAVE_D_TYPE | |
/* We only look at links and regular files. */ | |
if (direntry->d_type != DT_UNKNOWN | |
&& direntry->d_type != DT_LNK | |
&& direntry->d_type != DT_REG | |
&& direntry->d_type != DT_DIR) | |
continue; | |
#endif /* _DIRENT_HAVE_D_TYPE */ | |
/* Does this file look like a shared library or is it a hwcap | |
subdirectory? The dynamic linker is also considered as | |
shared library. */ | |
if (((strncmp (direntry->d_name, "lib", 3) != 0 | |
&& strncmp (direntry->d_name, "ld-", 3) != 0) | |
|| strstr (direntry->d_name, ".so") == NULL) | |
&& !is_hwcap_platform (direntry->d_name)) | |
continue; | |
len = strlen (entry->path) + strlen (direntry->d_name); | |
if (len > file_name_len) | |
{ | |
file_name_len = len + 1; | |
file_name = alloca (file_name_len); | |
if (!opt_chroot) | |
real_file_name = file_name; | |
} | |
sprintf (file_name, "%s/%s", entry->path, direntry->d_name); | |
if (opt_chroot) | |
{ | |
len = strlen (dir_name) + strlen (direntry->d_name); | |
if (len > real_file_name_len) | |
{ | |
real_file_name_len = len + 1; | |
real_file_name = alloca (real_file_name_len); | |
} | |
sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name); | |
} | |
#ifdef _DIRENT_HAVE_D_TYPE | |
if (direntry->d_type != DT_UNKNOWN) | |
stat_buf.st_mode = DTTOIF (direntry->d_type); | |
else | |
#endif | |
if (lstat64 (real_file_name, &stat_buf)) | |
{ | |
error (0, errno, _("Can't lstat %s"), file_name); | |
continue; | |
} | |
if (S_ISDIR (stat_buf.st_mode) && is_hwcap_platform (direntry->d_name)) | |
{ | |
/* Handle subdirectory later. */ | |
struct dir_entry *new_entry; | |
new_entry = xmalloc (sizeof (struct dir_entry)); | |
new_entry->path = xstrdup (file_name); | |
new_entry->flag = entry->flag; | |
new_entry->next = NULL; | |
add_single_dir (new_entry, 0); | |
continue; | |
} | |
else if (!S_ISREG (stat_buf.st_mode) && !S_ISLNK (stat_buf.st_mode)) | |
continue; | |
is_link = S_ISLNK (stat_buf.st_mode); | |
if (opt_chroot && is_link) | |
{ | |
real_name = chroot_canon (opt_chroot, file_name); | |
if (real_name == NULL) | |
{ | |
if (strstr (file_name, ".so") == NULL) | |
error (0, 0, _("Input file %s not found.\n"), file_name); | |
continue; | |
} | |
} | |
else | |
real_name = real_file_name; | |
if (process_file (real_name, file_name, direntry->d_name, &flag, | |
&soname, is_link)) | |
{ | |
if (real_name != real_file_name) | |
free (real_name); | |
continue; | |
} | |
if (real_name != real_file_name) | |
free (real_name); | |
/* Links will just point to itself. */ | |
if (is_link) | |
{ | |
free (soname); | |
soname = xstrdup (direntry->d_name); | |
} | |
if (flag == FLAG_ELF | |
&& (entry->flag == FLAG_ELF_LIBC5 | |
|| entry->flag == FLAG_ELF_LIBC6)) | |
flag = entry->flag; | |
/* Some sanity checks to print warnings. */ | |
if (opt_verbose) | |
{ | |
if (flag == FLAG_ELF_LIBC5 && entry->flag != FLAG_ELF_LIBC5 | |
&& entry->flag != FLAG_ANY) | |
error (0, 0, _("libc5 library %s in wrong directory"), file_name); | |
if (flag == FLAG_ELF_LIBC6 && entry->flag != FLAG_ELF_LIBC6 | |
&& entry->flag != FLAG_ANY) | |
error (0, 0, _("libc6 library %s in wrong directory"), file_name); | |
if (flag == FLAG_LIBC4 && entry->flag != FLAG_LIBC4 | |
&& entry->flag != FLAG_ANY) | |
error (0, 0, _("libc4 library %s in wrong directory"), file_name); | |
} | |
/* Add library to list. */ | |
for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) | |
{ | |
/* Is soname already in list? */ | |
if (strcmp (dlib_ptr->soname, soname) == 0) | |
{ | |
/* Prefer a file to a link, otherwise check which one | |
is newer. */ | |
if ((!is_link && dlib_ptr->is_link) | |
|| (is_link == dlib_ptr->is_link | |
&& _dl_cache_libcmp (dlib_ptr->name, direntry->d_name) < 0)) | |
{ | |
/* It's newer - add it. */ | |
/* Flag should be the same - sanity check. */ | |
if (dlib_ptr->flag != flag) | |
{ | |
if (dlib_ptr->flag == FLAG_ELF | |
&& (flag == FLAG_ELF_LIBC5 || flag == FLAG_ELF_LIBC6)) | |
dlib_ptr->flag = flag; | |
else if ((dlib_ptr->flag == FLAG_ELF_LIBC5 | |
|| dlib_ptr->flag == FLAG_ELF_LIBC6) | |
&& flag == FLAG_ELF) | |
dlib_ptr->flag = flag; | |
else | |
error (0, 0, _("libraries %s and %s in directory %s have same soname but different type."), | |
dlib_ptr->name, direntry->d_name, entry->path); | |
} | |
free (dlib_ptr->name); | |
dlib_ptr->name = xstrdup (direntry->d_name); | |
dlib_ptr->is_link = is_link; | |
} | |
/* Don't add this library, abort loop. */ | |
/* Also free soname, since it's dynamically allocated. */ | |
free (soname); | |
break; | |
} | |
} | |
/* Add the library if it's not already in. */ | |
if (dlib_ptr == NULL) | |
{ | |
dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry)); | |
dlib_ptr->name = xstrdup (direntry->d_name); | |
dlib_ptr->flag = flag; | |
dlib_ptr->soname = soname; | |
dlib_ptr->is_link = is_link; | |
/* Add at head of list. */ | |
dlib_ptr->next = dlibs; | |
dlibs = dlib_ptr; | |
} | |
} | |
closedir (dir); | |
/* Now dlibs contains a list of all libs - add those to the cache | |
and created all symbolic links. */ | |
for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next) | |
{ | |
/* Don't create links to links. */ | |
if (dlib_ptr->is_link == 0) | |
create_links (dir_name, entry->path, dlib_ptr->name, | |
dlib_ptr->soname); | |
if (opt_build_cache) | |
add_to_cache (entry->path, dlib_ptr->soname, dlib_ptr->flag, hwcap); | |
} | |
/* Free all resources. */ | |
while (dlibs) | |
{ | |
dlib_ptr = dlibs; | |
free (dlib_ptr->soname); | |
free (dlib_ptr->name); | |
dlibs = dlibs->next; | |
free (dlib_ptr); | |
} | |
if (opt_chroot && dir_name) | |
free (dir_name); | |
} | |
/* Search through all libraries. */ | |
static void | |
search_dirs (void) | |
{ | |
struct dir_entry *entry; | |
for (entry = dir_entries; entry != NULL; entry = entry->next) | |
search_dir (entry); | |
/* Free all allocated memory. */ | |
while (dir_entries) | |
{ | |
entry = dir_entries; | |
dir_entries = dir_entries->next; | |
free (entry->path); | |
free (entry); | |
} | |
} | |
/* Parse configuration file. */ | |
static void | |
parse_conf (const char *filename) | |
{ | |
FILE *file = NULL; | |
char *line = NULL; | |
const char *canon; | |
size_t len = 0; | |
if (opt_chroot) | |
{ | |
canon = chroot_canon (opt_chroot, filename); | |
if (canon) | |
file = fopen (canon, "r"); | |
else | |
canon = filename; | |
} | |
else | |
{ | |
canon = filename; | |
file = fopen (filename, "r"); | |
} | |
if (file == NULL) | |
{ | |
error (0, errno, _("Can't open configuration file %s"), canon); | |
if (canon != filename) | |
free ((char *) canon); | |
return; | |
} | |
if (canon != filename) | |
free ((char *) canon); | |
do | |
{ | |
ssize_t n = getline (&line, &len, file); | |
if (n < 0) | |
break; | |
if (line[n - 1] == '\n') | |
line[n - 1] = '\0'; | |
/* Because the file format does not know any form of quoting we | |
can search forward for the next '#' character and if found | |
make it terminating the line. */ | |
*strchrnul (line, '#') = '\0'; | |
/* If the line is blank it is ignored. */ | |
if (line[0] == '\0') | |
continue; | |
add_dir (line); | |
} while (!feof (file)); | |
/* Free buffer and close file. */ | |
free (line); | |
fclose (file); | |
} | |
int | |
main (int argc, char **argv) | |
{ | |
int remaining; | |
/* Parse and process arguments. */ | |
argp_parse (&argp, argc, argv, 0, &remaining, NULL); | |
/* Remaining arguments are additional libraries if opt_manual_link | |
is not set. */ | |
if (remaining != argc && !opt_manual_link) | |
{ | |
int i; | |
for (i = remaining; i < argc; ++i) | |
add_dir (argv [i]); | |
} | |
if (opt_chroot) | |
{ | |
/* Normalize the path a bit, we might need it for printing later. */ | |
char *endp = strchr (opt_chroot, '\0'); | |
while (endp > opt_chroot && endp[-1] == '/') | |
--endp; | |
*endp = '\0'; | |
if (endp == opt_chroot) | |
opt_chroot = NULL; | |
if (opt_chroot) | |
{ | |
/* It is faster to use chroot if we can. */ | |
if (!chroot (opt_chroot)) | |
{ | |
if (chdir ("/")) | |
error (EXIT_FAILURE, errno, _("Can't chdir to /")); | |
opt_chroot = NULL; | |
} | |
} | |
} | |
if (cache_file == NULL) | |
{ | |
cache_file = alloca (strlen (LD_SO_CACHE) + 1); | |
strcpy (cache_file, LD_SO_CACHE); | |
} | |
if (config_file == NULL) | |
config_file = LD_SO_CONF; | |
if (opt_print_cache) | |
{ | |
if (opt_chroot) | |
{ | |
char *p = chroot_canon (opt_chroot, cache_file); | |
if (p == NULL) | |
error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"), | |
cache_file); | |
cache_file = p; | |
} | |
print_cache (cache_file); | |
if (opt_chroot) | |
free (cache_file); | |
exit (0); | |
} | |
if (opt_chroot) | |
{ | |
/* Canonicalize the directory name of cache_file, not cache_file, | |
because we'll rename a temporary cache file to it. */ | |
char *p = strrchr (cache_file, '/'); | |
char *canon = chroot_canon (opt_chroot, | |
p ? (*p = '\0', cache_file) : "/"); | |
if (canon == NULL) | |
{ | |
error (EXIT_FAILURE, errno, | |
_("Can't open cache file directory %s\n"), | |
p ? cache_file : "/"); | |
} | |
if (p) | |
++p; | |
else | |
p = cache_file; | |
cache_file = alloca (strlen (canon) + strlen (p) + 2); | |
sprintf (cache_file, "%s/%s", canon, p); | |
free (canon); | |
} | |
if (opt_manual_link) | |
{ | |
/* Link all given libraries manually. */ | |
int i; | |
for (i = remaining; i < argc; ++i) | |
manual_link (argv [i]); | |
exit (0); | |
} | |
if (opt_build_cache) | |
init_cache (); | |
if (!opt_only_cline) | |
{ | |
/* Always add the standard search paths. */ | |
add_dir (SLIBDIR); | |
if (strcmp (SLIBDIR, LIBDIR)) | |
add_dir (LIBDIR); | |
parse_conf (config_file); | |
} | |
search_dirs (); | |
if (opt_build_cache) | |
save_cache (cache_file); | |
return 0; | |
} |