Import glibc-mainline for 2006-08-16

git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d

1 files changed, 1297 insertions, 0 deletions

diff --git a/libc/elf/ldconfig.c b/libc/elf/ldconfig.c
new file mode 100644
index 000000000..5b9a5b174
--- /dev/null
+++ b/libc/elf/ldconfig.c
@@ -0,0 +1,1297 @@
+/* Copyright (C) 1999-2004, 2005, 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 1999.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#define PROCINFO_CLASS static
+#include <alloca.h>
+#include <argp.h>
+#include <dirent.h>
+#include <elf.h>
+#include <error.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <libintl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <glob.h>
+#include <libgen.h>
+
+#include <ldconfig.h>
+#include <dl-cache.h>
+
+#include <dl-procinfo.h>
+
+#ifdef _DL_FIRST_PLATFORM
+# define _DL_FIRST_EXTRA (_DL_FIRST_PLATFORM + _DL_PLATFORMS_COUNT)
+#else
+# define _DL_FIRST_EXTRA _DL_HWCAP_COUNT
+#endif
+
+#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
+
+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;
+  ino64_t ino;
+  dev_t dev;
+  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;
+
+/* Be verbose.  */
+int opt_verbose;
+
+/* 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;
+
+/* Path to root for chroot.  */
+static char *opt_chroot;
+
+/* Manually link given shared libraries.  */
+static int opt_manual_link;
+
+/* Cache file to use.  */
+static char *cache_file;
+
+/* Configuration file.  */
+static const char *config_file;
+
+/* Mask to use for important hardware capabilities.  */
+static unsigned long int hwcap_mask = HWCAP_IMPORTANT;
+
+/* Configuration-defined capabilities defined in kernel vDSOs.  */
+static const char *hwcap_extra[64 - _DL_FIRST_EXTRA];
+
+/* 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', N_("ROOT"), 0, N_("Change to and use ROOT as root directory"), 0},
+  { NULL, 'C', N_("CACHE"), 0, N_("Use CACHE as cache file"), 0},
+  { NULL, 'f', N_("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', N_("FORMAT"), 0, N_("Format to use: new, old or compat (default)"), 0},
+  { NULL, 0, NULL, 0, NULL, 0 }
+};
+
+#define PROCINFO_CLASS static
+#include <dl-procinfo.c>
+
+/* 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_mask))
+    return 1;
+
+  hwcap_idx = _dl_string_platform (name);
+  if (hwcap_idx != -1)
+    return 1;
+
+  for (hwcap_idx = _DL_FIRST_EXTRA; hwcap_idx < 64; ++hwcap_idx)
+    if (hwcap_extra[hwcap_idx - _DL_FIRST_EXTRA] != NULL
+	&& !strcmp (name, hwcap_extra[hwcap_idx - _DL_FIRST_EXTRA]))
+      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)
+	    {
+	      for (h = _DL_FIRST_EXTRA; h < 64; ++h)
+		if (hwcap_extra[h - _DL_FIRST_EXTRA] != NULL
+		    && !strcmp (ptr + 1, hwcap_extra[h - _DL_FIRST_EXTRA]))
+		  break;
+	      if (h == 64)
+		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\
+"), "2006");
+  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 (ptr->ino == entry->ino && ptr->dev == entry->dev)
+	{
+	  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->path);
+	  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)
+{
+  unsigned int i;
+  struct dir_entry *entry = xmalloc (sizeof (struct dir_entry));
+  entry->next = NULL;
+
+  /* Search for an '=' sign.  */
+  entry->path = xstrdup (line);
+  char *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 leading and trailing
+     whitespace and the trailing slashes slashes.  */
+  i = strlen (entry->path) - 1;
+
+  while (isspace (entry->path[i]) && i > 0)
+    entry->path[i--] = '\0';
+
+  while (entry->path[i] == '/' && i > 0)
+    entry->path[i--] = '\0';
+
+  char *path = entry->path;
+  if (opt_chroot)
+    path = chroot_canon (opt_chroot, path);
+
+  struct stat64 stat_buf;
+  if (path == NULL || stat64 (path, &stat_buf))
+    {
+      if (opt_verbose)
+	error (0, errno, _("Can't stat %s"), entry->path);
+      free (entry->path);
+      free (entry);
+    }
+  else
+    {
+      entry->ino = stat_buf.st_ino;
+      entry->dev = stat_buf.st_dev;
+
+      add_single_dir (entry, 1);
+    }
+
+  if (opt_chroot)
+    free (path);
+}
+
+
+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;
+  unsigned int osversion;
+
+  /* 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, &osversion,
+		    &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;
+  unsigned int osversion;
+  struct dlib_entry *next;
+};
+
+
+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)
+	printf ("%s: (hwcap: %#.16" PRIx64 ")\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 = readdir64 (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)
+	  && (
+#ifdef _DIRENT_HAVE_D_TYPE
+	      direntry->d_type == DT_REG ||
+#endif
+	      !is_hwcap_platform (direntry->d_name)))
+	continue;
+      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)
+	{
+	  if (strcmp (direntry->d_name + len - sizeof (".#prelink#") + 1,
+		      ".#prelink#") == 0)
+	    continue;
+	  if (len >= sizeof (".#prelink#.XXXXXX") - 1
+	      && memcmp (direntry->d_name + len - sizeof (".#prelink#.XXXXXX")
+			 + 1, ".#prelink#.", sizeof (".#prelink#.") - 1) == 0)
+	    continue;
+	}
+      len += strlen (entry->path);
+      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)
+	lstat_buf.st_mode = DTTOIF (direntry->d_type);
+      else
+#endif
+	if (__builtin_expect (lstat64 (real_file_name, &lstat_buf), 0))
+	  {
+	    error (0, errno, _("Cannot lstat %s"), file_name);
+	    continue;
+	  }
+
+      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))
+	    {
+	      if (opt_verbose)
+		error (0, errno, _("Cannot stat %s"), file_name);
+
+	      /* Remove stale symlinks.  */
+	      if (strstr (direntry->d_name, ".so."))
+		unlink (real_file_name);
+	      continue;
+	    }
+	  is_dir = S_ISDIR (stat_buf.st_mode);
+	}
+      else
+	is_dir = S_ISDIR (lstat_buf.st_mode);
+
+      if (is_dir && 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;
+	  if (is_link)
+	    {
+	      new_entry->ino = stat_buf.st_ino;
+	      new_entry->dev = stat_buf.st_dev;
+	    }
+	  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;
+	    }
+	  add_single_dir (new_entry, 0);
+	  continue;
+	}
+      else if (!S_ISREG (lstat_buf.st_mode) && !is_link)
+	continue;
+
+      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,
+			&osversion, &soname, is_link))
+	{
+	  if (real_name != real_file_name)
+	    free (real_name);
+	  continue;
+	}
+
+
+      /* A link may just point to itself.  */
+      if (is_link)
+	{
+	  /* If the path the link points to isn't its soname and it is not
+	     .so symlink for ld(1) only, we treat it as a normal file.  */
+	  const char *real_base_name = basename (real_file_name);
+
+	  if (strcmp (real_base_name, soname) != 0)
+	    {
+	      len = strlen (real_base_name);
+	      if (len < strlen (".so")
+		  || strcmp (real_base_name + len - strlen (".so"), ".so") != 0
+		  || strncmp (real_base_name, soname, len) != 0)
+		is_link = 0;
+	    }
+        }
+
+      if (real_name != real_file_name)
+	free (real_name);
+
+      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->osversion = osversion;
+		  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->osversion = osversion;
+	  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,
+		      dlib_ptr->osversion, 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);
+    }
+}
+
+
+static void parse_conf_include (const char *config_file, unsigned int lineno,
+				bool do_chroot, const char *pattern);
+
+/* Parse configuration file.  */
+static void
+parse_conf (const char *filename, bool do_chroot)
+{
+  FILE *file = NULL;
+  char *line = NULL;
+  const char *canon;
+  size_t len = 0;
+  unsigned int lineno;
+
+  if (do_chroot && 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;
+    }
+
+  /* No threads use this stream.  */
+  __fsetlocking (file, FSETLOCKING_BYCALLER);
+
+  if (canon != filename)
+    free ((char *) canon);
+
+  lineno = 0;
+  do
+    {
+      ssize_t n = getline (&line, &len, file);
+      if (n < 0)
+	break;
+
+      ++lineno;
+      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';
+
+      /* Remove leading whitespace.  NUL is no whitespace character.  */
+      char *cp = line;
+      while (isspace (*cp))
+	++cp;
+
+      /* If the line is blank it is ignored.  */
+      if (cp[0] == '\0')
+	continue;
+
+      if (!strncmp (cp, "include", 7) && isblank (cp[7]))
+	{
+	  char *dir;
+	  cp += 8;
+	  while ((dir = strsep (&cp, " \t")) != NULL)
+	    if (dir[0] != '\0')
+	      parse_conf_include (filename, lineno, do_chroot, dir);
+	}
+      else if (!strncasecmp (cp, "hwcap", 5) && isblank (cp[5]))
+	{
+	  cp += 6;
+	  char *p, *name = NULL;
+	  unsigned long int n = strtoul (cp, &cp, 0);
+	  if (cp != NULL && isblank (*cp))
+	    while ((p = strsep (&cp, " \t")) != NULL)
+	      if (p[0] != '\0')
+		{
+		  if (name == NULL)
+		    name = p;
+		  else
+		    {
+		      name = NULL;
+		      break;
+		    }
+		}
+	  if (name == NULL)
+	    {
+	      error (EXIT_FAILURE, 0, _("%s:%u: bad syntax in hwcap line"),
+		     filename, lineno);
+	      break;
+	    }
+	  if (n >= (64 - _DL_FIRST_EXTRA))
+	    error (EXIT_FAILURE, 0,
+		   _("%s:%u: hwcap index %lu above maximum %u"),
+		   filename, lineno, n, 64 - _DL_FIRST_EXTRA - 1);
+	  if (hwcap_extra[n] == NULL)
+	    {
+	      for (unsigned long int h = 0; h < (64 - _DL_FIRST_EXTRA); ++h)
+		if (hwcap_extra[h] != NULL && !strcmp (name, hwcap_extra[h]))
+		  error (EXIT_FAILURE, 0,
+			 _("%s:%u: hwcap index %lu already defined as %s"),
+			 filename, lineno, h, name);
+	      hwcap_extra[n] = xstrdup (name);
+	    }
+	  else
+	    {
+	      if (strcmp (name, hwcap_extra[n]))
+		error (EXIT_FAILURE, 0,
+		       _("%s:%u: hwcap index %lu already defined as %s"),
+		       filename, lineno, n, hwcap_extra[n]);
+	      if (opt_verbose)
+		error (0, 0, _("%s:%u: duplicate hwcap %lu %s"),
+		       filename, lineno, n, name);
+	    }
+	}
+      else
+	add_dir (cp);
+    }
+  while (!feof_unlocked (file));
+
+  /* Free buffer and close file.  */
+  free (line);
+  fclose (file);
+}
+
+/* Handle one word in an `include' line, a glob pattern of additional
+   config files to read.  */
+static void
+parse_conf_include (const char *config_file, unsigned int lineno,
+		    bool do_chroot, const char *pattern)
+{
+  if (opt_chroot && pattern[0] != '/')
+    error (EXIT_FAILURE, 0,
+	   _("need absolute file name for configuration file when using -r"));
+
+  char *copy = NULL;
+  if (pattern[0] != '/' && strchr (config_file, '/') != NULL)
+    {
+      if (asprintf (&copy, "%s/%s", dirname (strdupa (config_file)),
+		    pattern) < 0)
+	error (EXIT_FAILURE, 0, _("memory exhausted"));
+      pattern = copy;
+    }
+
+  glob64_t gl;
+  int result;
+  if (do_chroot && opt_chroot)
+    {
+      char *canon = chroot_canon (opt_chroot, pattern);
+      result = glob64 (canon ?: pattern, 0, NULL, &gl);
+      free (canon);
+    }
+  else
+    result = glob64 (pattern, 0, NULL, &gl);
+
+  switch (result)
+    {
+    case 0:
+      for (size_t i = 0; i < gl.gl_pathc; ++i)
+	parse_conf (gl.gl_pathv[i], false);
+      globfree64 (&gl);
+      break;
+
+    case GLOB_NOMATCH:
+      break;
+
+    case GLOB_NOSPACE:
+      errno = ENOMEM;
+    case GLOB_ABORTED:
+      if (opt_verbose)
+	error (0, errno, _("%s:%u: cannot read directory %s"),
+	       config_file, lineno, pattern);
+      break;
+
+    default:
+      abort ();
+      break;
+    }
+
+  if (copy)
+    free (copy);
+}
+
+/* Honour LD_HWCAP_MASK.  */
+static void
+set_hwcap (void)
+{
+  char *mask = getenv ("LD_HWCAP_MASK");
+
+  if (mask)
+    hwcap_mask = strtoul (mask, NULL, 0);
+}
+
+
+int
+main (int argc, char **argv)
+{
+  int remaining;
+
+  /* Parse and process arguments.  */
+  argp_parse (&argp, argc, argv, 0, &remaining, NULL);
+
+  /* Remaining arguments are additional directories if opt_manual_link
+     is not set.  */
+  if (remaining != argc && !opt_manual_link)
+    {
+      int i;
+      for (i = remaining; i < argc; ++i)
+	if (opt_build_cache && argv[i][0] != '/')
+	  error (EXIT_FAILURE, 0,
+		 _("relative path `%s' used to build cache"),
+		 argv[i]);
+	else
+	  add_dir (argv[i]);
+    }
+
+#ifdef USE_TLS
+  hwcap_extra[63 - _DL_FIRST_EXTRA] = "tls";
+#endif
+
+  set_hwcap ();
+
+  if (opt_chroot)
+    {
+      /* Normalize the path a bit, we might need it for printing later.  */
+      char *endp = rawmemchr (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)
+    {
+      parse_conf (config_file, true);
+
+      /* Always add the standard search paths.  */
+      add_system_dir (SLIBDIR);
+      if (strcmp (SLIBDIR, LIBDIR))
+	add_system_dir (LIBDIR);
+    }
+
+  search_dirs ();
+
+  if (opt_build_cache)
+    save_cache (cache_file);
+
+  return 0;
+}