diff options
Diffstat (limited to 'elf/ldconfig.c')
| -rw-r--r-- | elf/ldconfig.c | 148 |
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; } |