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authorUlrich Drepper <drepper@redhat.com>2007-08-12 20:09:16 +0000
committerUlrich Drepper <drepper@redhat.com>2007-08-12 20:09:16 +0000
commit27d9ffda17df4d2388687afd12897774fde39bcc (patch)
treee68c74b095d9ae0b5eea23c0b80c54b73b94d3b6 /elf/ldconfig.c
parent8d944b0fc6195a2cd2308287e96a46b21f675015 (diff)
downloadglibc-27d9ffda17df4d2388687afd12897774fde39bcc.tar.gz
2007-08-01 Andreas Jaeger <aj@suse.de>
Jakub Jelinek <jakub@redhat.com> * elf/ldconfig.c (opt_ignore_aux_cache): Add new option. (options): Add option. (parse_opt): Handle option. (manual_link): Adjust process_file caller. Call implicit_soname. (search_dir): Formatting. Use and populate auxiliary cache. (main): Load and save auxiliary cache. * elf/readlib.c (process_file): Add stat_buf argument. Pass struct stat64 from fstat64 to caller. (implicit_soname): New function. * elf/readelflib.c (process_elf_file): If DT_SONAME is not present, leave *soname as NULL. * elf/cache.c: Include libgen.h. (print_entry, print_cache, compare, save_cache, add_to_cache): Formatting and cleanups. (aux_cache_entry_id, aux_cache_entry, aux_cache_file_entry, aux_cache_file): New structures. (AUX_CACHEMAGIC): Define. (primes): New array. (aux_hash_size, aux_hash): New variables. (aux_cache_entry_id_hash, nextprime, init_aux_cache, search_aux_cache, insert_to_aux_cache, add_to_aux_cache, load_aux_cache, save_aux_cache): New functions. * sysdeps/generic/ldconfig.h (_PATH_LDCONFIG_AUX_CACHE): Define. (init_aux_cache, search_aux_cache, add_to_aux_cache, load_aux_cache, save_aux_cache, implicit_soname): New prototypes. (process_file): Adjust prototype.
Diffstat (limited to 'elf/ldconfig.c')
-rw-r--r--elf/ldconfig.c148
1 files changed, 95 insertions, 53 deletions
diff --git a/elf/ldconfig.c b/elf/ldconfig.c
index accc9f95d5..31d13c4802 100644
--- a/elf/ldconfig.c
+++ b/elf/ldconfig.c
@@ -112,6 +112,9 @@ static char *opt_chroot;
/* Manually link given shared libraries. */
static int opt_manual_link;
+/* Should we ignore an old auxiliary cache file? */
+static int opt_ignore_aux_cache;
+
/* Cache file to use. */
static char *cache_file;
@@ -142,6 +145,7 @@ static const struct argp_option options[] =
{ 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', N_("FORMAT"), 0, N_("Format to use: new, old or compat (default)"), 0},
+ { "ignore-aux-cache", 'i', NULL, 0, N_("Ignore auxiliary cache file"), 0},
{ NULL, 0, NULL, 0, NULL, 0 }
};
@@ -238,10 +242,15 @@ parse_opt (int key, char *arg, struct argp_state *state)
{
case 'C':
cache_file = arg;
+ /* Ignore auxiliary cache since we use non-standard cache. */
+ opt_ignore_aux_cache = 1;
break;
case 'f':
config_file = arg;
break;
+ case 'i':
+ opt_ignore_aux_cache = 1;
+ break;
case 'l':
opt_manual_link = 1;
break;
@@ -518,7 +527,7 @@ manual_link (char *library)
if (libname)
{
/* Successfully split names. Check if path is just "/" to avoid
- an empty path. */
+ an empty path. */
if (libname == path)
{
libname = library + 1;
@@ -572,14 +581,17 @@ manual_link (char *library)
free (path);
return;
}
+
if (process_file (real_library, library, libname, &flag, &osversion,
- &soname, 0))
+ &soname, 0, &stat_buf))
{
error (0, 0, _("No link created since soname could not be found for %s"),
library);
free (path);
return;
}
+ if (soname == NULL)
+ soname = implicit_soname (libname, flag);
create_links (real_path, path, libname, soname);
free (soname);
free (path);
@@ -625,23 +637,7 @@ struct dlib_entry
static void
search_dir (const struct dir_entry *entry)
{
- DIR *dir;
- struct dirent64 *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 lstat_buf, stat_buf;
- int is_link, is_dir;
uint64_t hwcap = path_hwcap (entry->path);
- unsigned int osversion;
-
- file_name_len = PATH_MAX;
- file_name = alloca (file_name_len);
-
- dlibs = NULL;
-
if (opt_verbose)
{
if (hwcap != 0)
@@ -650,6 +646,11 @@ search_dir (const struct dir_entry *entry)
printf ("%s:\n", entry->path);
}
+ char *dir_name;
+ char *real_file_name;
+ size_t real_file_name_len;
+ size_t file_name_len = PATH_MAX;
+ char *file_name = alloca (file_name_len);
if (opt_chroot)
{
dir_name = chroot_canon (opt_chroot, entry->path);
@@ -663,6 +664,7 @@ search_dir (const struct dir_entry *entry)
real_file_name = file_name;
}
+ DIR *dir;
if (dir_name == NULL || (dir = opendir (dir_name)) == NULL)
{
if (opt_verbose)
@@ -672,6 +674,8 @@ search_dir (const struct dir_entry *entry)
return;
}
+ struct dirent64 *direntry;
+ struct dlib_entry *dlibs = NULL;
while ((direntry = readdir64 (dir)) != NULL)
{
int flag;
@@ -695,7 +699,8 @@ search_dir (const struct dir_entry *entry)
#endif
!is_hwcap_platform (direntry->d_name)))
continue;
- len = strlen (direntry->d_name);
+
+ size_t len = strlen (direntry->d_name);
/* Skip temporary files created by the prelink program. Files with
names like these are never really DSOs we want to look at. */
if (len >= sizeof (".#prelink#") - 1)
@@ -727,7 +732,10 @@ search_dir (const struct dir_entry *entry)
}
sprintf (real_file_name, "%s/%s", dir_name, direntry->d_name);
}
+
+ struct stat64 lstat_buf;
#ifdef _DIRENT_HAVE_D_TYPE
+ /* We optimize and try to do the lstat call only if needed. */
if (direntry->d_type != DT_UNKNOWN)
lstat_buf.st_mode = DTTOIF (direntry->d_type);
else
@@ -738,9 +746,11 @@ search_dir (const struct dir_entry *entry)
continue;
}
- is_link = S_ISLNK (lstat_buf.st_mode);
+ struct stat64 stat_buf;
+ int is_dir;
+ int is_link = S_ISLNK (lstat_buf.st_mode);
if (is_link)
- {
+ {
/* In case of symlink, we check if the symlink refers to
a directory. */
if (__builtin_expect (stat64 (real_file_name, &stat_buf), 0))
@@ -754,6 +764,12 @@ search_dir (const struct dir_entry *entry)
continue;
}
is_dir = S_ISDIR (stat_buf.st_mode);
+
+ /* lstat_buf is later stored, update contents. */
+ lstat_buf.st_dev = stat_buf.st_dev;
+ lstat_buf.st_ino = stat_buf.st_ino;
+ lstat_buf.st_size = stat_buf.st_size;
+ lstat_buf.st_ctime = stat_buf.st_ctime;
}
else
is_dir = S_ISDIR (lstat_buf.st_mode);
@@ -767,36 +783,28 @@ search_dir (const struct dir_entry *entry)
new_entry->path = xstrdup (file_name);
new_entry->flag = entry->flag;
new_entry->next = NULL;
- if (is_link)
+#ifdef _DIRENT_HAVE_D_TYPE
+ /* We have filled in lstat only #ifndef
+ _DIRENT_HAVE_D_TYPE. Fill it in if needed. */
+ if (!is_link
+ && direntry->d_type != DT_UNKNOWN
+ && __builtin_expect (lstat64 (real_file_name, &lstat_buf), 0))
{
- new_entry->ino = stat_buf.st_ino;
- new_entry->dev = stat_buf.st_dev;
+ error (0, errno, _("Cannot lstat %s"), file_name);
+ free (new_entry->path);
+ free (new_entry);
+ continue;
}
- else
- {
-#ifdef _DIRENT_HAVE_D_TYPE
- /* We have filled in lstat only #ifndef
- _DIRENT_HAVE_D_TYPE. Fill it in if needed. */
- if (direntry->d_type != DT_UNKNOWN
- && __builtin_expect (lstat64 (real_file_name, &lstat_buf),
- 0))
- {
- error (0, errno, _("Cannot lstat %s"), file_name);
- free (new_entry->path);
- free (new_entry);
- continue;
- }
#endif
-
- new_entry->ino = lstat_buf.st_ino;
- new_entry->dev = lstat_buf.st_dev;
- }
+ new_entry->ino = lstat_buf.st_ino;
+ new_entry->dev = lstat_buf.st_dev;
add_single_dir (new_entry, 0);
continue;
}
else if (!S_ISREG (lstat_buf.st_mode) && !is_link)
continue;
+ char *real_name;
if (opt_chroot && is_link)
{
real_name = chroot_canon (opt_chroot, file_name);
@@ -810,14 +818,36 @@ search_dir (const struct dir_entry *entry)
else
real_name = real_file_name;
- if (process_file (real_name, file_name, direntry->d_name, &flag,
- &osversion, &soname, is_link))
+#ifdef _DIRENT_HAVE_D_TYPE
+ /* Call lstat64 if not done yet. */
+ if (!is_link
+ && direntry->d_type != DT_UNKNOWN
+ && __builtin_expect (lstat64 (real_file_name, &lstat_buf), 0))
{
- if (real_name != real_file_name)
- free (real_name);
+ error (0, errno, _("Cannot lstat %s"), file_name);
continue;
}
+#endif
+
+ /* First search whether the auxiliary cache contains this
+ library already and it's not changed. */
+ char *soname;
+ unsigned int osversion;
+ if (!search_aux_cache (&lstat_buf, &flag, &osversion, &soname))
+ {
+ if (process_file (real_name, file_name, direntry->d_name, &flag,
+ &osversion, &soname, is_link, &lstat_buf))
+ {
+ if (real_name != real_file_name)
+ free (real_name);
+ continue;
+ }
+ else if (opt_build_cache)
+ add_to_aux_cache (&lstat_buf, flag, osversion, soname);
+ }
+ if (soname == NULL)
+ soname = implicit_soname (direntry->d_name, flag);
/* A link may just point to itself. */
if (is_link)
@@ -834,7 +864,7 @@ search_dir (const struct dir_entry *entry)
|| strncmp (real_base_name, soname, len) != 0)
is_link = 0;
}
- }
+ }
if (real_name != real_file_name)
free (real_name);
@@ -849,6 +879,7 @@ search_dir (const struct dir_entry *entry)
&& (entry->flag == FLAG_ELF_LIBC5
|| entry->flag == FLAG_ELF_LIBC6))
flag = entry->flag;
+
/* Some sanity checks to print warnings. */
if (opt_verbose)
{
@@ -864,6 +895,7 @@ search_dir (const struct dir_entry *entry)
}
/* Add library to list. */
+ struct dlib_entry *dlib_ptr;
for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next)
{
/* Is soname already in list? */
@@ -888,12 +920,13 @@ search_dir (const struct dir_entry *entry)
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);
+ dlib_ptr->name, direntry->d_name,
+ entry->path);
}
free (dlib_ptr->name);
- dlib_ptr->osversion = osversion;
dlib_ptr->name = xstrdup (direntry->d_name);
dlib_ptr->is_link = is_link;
+ dlib_ptr->osversion = osversion;
}
/* Don't add this library, abort loop. */
/* Also free soname, since it's dynamically allocated. */
@@ -906,10 +939,10 @@ search_dir (const struct dir_entry *entry)
{
dlib_ptr = (struct dlib_entry *)xmalloc (sizeof (struct dlib_entry));
dlib_ptr->name = xstrdup (direntry->d_name);
- dlib_ptr->flag = flag;
- dlib_ptr->osversion = osversion;
dlib_ptr->soname = soname;
+ dlib_ptr->flag = flag;
dlib_ptr->is_link = is_link;
+ dlib_ptr->osversion = osversion;
/* Add at head of list. */
dlib_ptr->next = dlibs;
dlibs = dlib_ptr;
@@ -920,6 +953,7 @@ search_dir (const struct dir_entry *entry)
/* Now dlibs contains a list of all libs - add those to the cache
and created all symbolic links. */
+ struct dlib_entry *dlib_ptr;
for (dlib_ptr = dlibs; dlib_ptr != NULL; dlib_ptr = dlib_ptr->next)
{
/* Don't create links to links. */
@@ -1246,7 +1280,7 @@ main (int argc, char **argv)
if (opt_chroot)
{
/* Canonicalize the directory name of cache_file, not cache_file,
- because we'll rename a temporary cache file to it. */
+ 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) : "/");
@@ -1293,10 +1327,18 @@ main (int argc, char **argv)
add_system_dir (LIBDIR);
}
+ if (! opt_ignore_aux_cache)
+ load_aux_cache (_PATH_LDCONFIG_AUX_CACHE);
+ else
+ init_aux_cache ();
+
search_dirs ();
if (opt_build_cache)
- save_cache (cache_file);
+ {
+ save_cache (cache_file);
+ save_aux_cache (_PATH_LDCONFIG_AUX_CACHE);
+ }
return 0;
}