Update.

1999-11-30 Andreas Jaeger <aj@suse.de> Add ldconfig: * elf/Makefile (extra-objs): Added ldconfig-modules. (ldconfig-modules): New. Added vpath for xstrdup and xmalloc. Check for use-ldconfig instead of has-ldconfig. ($(objpfx)ldconfig): New rule with dependencies. (distribute): Add new files. * sysdeps/unix/sysv/linux/sparc/readelflib.c: New file, developed together with Jakub Jelinek <jakub@redhat.com>. * sysdeps/generic/readelflib.c: Likewise. * elf/cache.c: New file. * elf/ldconfig.c: New file. * elf/ldconfig.h: New file. * elf/readlib.c: New file. * Makefile (install): Remove flag -d in ldconfig call. * configure.in: Rename has_ldconfig to use_ldconfig, set it to no by default. * config.make.in (has-ldconfig): Renamed to use-ldconfig, changed comment.
2026-01-06 11:51:29 +03:00 · 1999-12-04 08:00:00 +00:00
parent 589328764d
commit 591e1ffbf8
12 changed files with 1516 additions and 7 deletions
--- a/elf/cache.c
+++ b/elf/cache.c
@@ -0,0 +1,363 @@
+/* Copyright (C) 1999 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.  */
+
+#define _GNU_SOURCE 1
+
+#include <assert.h>
+#include <errno.h>
+#include <error.h>
+#include <dirent.h>
+#include <libintl.h>
+#include <stdio.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 "ldconfig.h"
+
+#define CACHEMAGIC "ld.so-1.7.0"
+
+struct cache_entry
+{
+  char *lib;
+  char *path;
+  int flags;
+  struct cache_entry *next;
+};
+
+struct file_entry
+{
+  int flags;		/* This is 1 for an ELF library.  */
+  unsigned int key, value; /* String table indices.  */
+};
+
+
+struct cache_file
+{
+  char magic[sizeof CACHEMAGIC - 1];
+  unsigned int nlibs;
+  struct file_entry libs[0];
+};
+
+
+/* List of all cache entries.  */
+static struct cache_entry *entries;
+
+static const char *flag_descr[] =
+{ "libc4", "ELF", "libc5", "libc6"};
+
+
+/* Print a single entry.  */
+static void
+print_entry (const char *lib, int flag, const char *key)
+{
+  printf ("\t%s (", lib);
+  switch (flag)
+    {
+    case FLAG_LIBC4:
+    case FLAG_ELF:
+    case FLAG_ELF_LIBC5:
+    case FLAG_ELF_LIBC6:
+      fputs (flag_descr [flag & FLAG_TYPE_MASK], stdout);
+      break;
+    default:
+      fputs ("unknown", stdout);
+      break;
+    }
+  switch (flag & FLAG_REQUIRED_MASK)
+    {
+#ifdef __sparc__
+    case FLAG_SPARC_LIB64:
+      fputs (",64bit", stdout);
+#endif
+    case 0:
+      break;
+    default:
+      fprintf (stdout, ",%d", flag & FLAG_REQUIRED_MASK);
+      break;
+    }
+  printf (") => %s\n", key);
+}
+
+
+/* Print the whole cache file.  */
+void
+print_cache (const char *cache_name)
+{
+  size_t cache_size;
+  struct stat st;
+  int fd;
+  unsigned int i;
+  struct cache_file *cache;
+  const char *cache_data;
+  
+  fd = open (cache_name, O_RDONLY);
+  if (fd < 0)
+    error (EXIT_FAILURE, errno, _("Can't open cache file %s\n"), cache_name);
+
+  if (fstat (fd, &st) < 0
+      /* No need to map the file if it is empty.  */
+      || st.st_size == 0)
+    {
+      close (fd);
+      return;
+    }
+  
+  cache = mmap (0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+  if (cache == MAP_FAILED)
+    error (EXIT_FAILURE, errno, _("mmap of cache file failed.\n"));
+  cache_size = st.st_size;
+
+  if (cache_size < sizeof (struct cache_file)
+      || memcmp (cache->magic, CACHEMAGIC, sizeof CACHEMAGIC - 1))
+    return;
+  /* This is where the strings start.  */
+  cache_data = (const char *) &cache->libs[cache->nlibs];
+
+  printf (_("%d libs found in cache `%s'\n"), cache->nlibs, cache_name);
+  
+  /* Print everything.  */
+  for (i = 0; i < cache->nlibs; i++)
+    print_entry (cache_data + cache->libs[i].key,
+		 cache->libs[i].flags,
+		 cache_data + cache->libs[i].value);
+
+  /* Cleanup.  */
+  munmap (cache, cache_size);
+  close (fd);
+}
+
+/* Initialize cache data structures.  */
+void
+init_cache (void)
+{
+  entries = NULL;
+}
+
+
+/* Helper function which must match the one in the dynamic linker, so that
+   we rely on the same sort order.  */
+int
+cache_libcmp (const char *p1, const char *p2)
+{
+  while (*p1 != '\0')
+    {
+      if (*p1 >= '0' && *p1 <= '9')
+        {
+          if (*p2 >= '0' && *p2 <= '9')
+            {
+	      /* Must compare this numerically.  */
+	      int val1;
+	      int val2;
+
+	      val1 = *p1++ - '0';
+	      val2 = *p2++ - '0';
+	      while (*p1 >= '0' && *p1 <= '9')
+	        val1 = val1 * 10 + *p1++ - '0';
+	      while (*p2 >= '0' && *p2 <= '9')
+	        val2 = val2 * 10 + *p2++ - '0';
+	      if (val1 != val2)
+		return val1 - val2;
+	    }
+	  else
+            return 1;
+        }
+      else if (*p2 >= '0' && *p2 <= '9')
+        return -1;
+      else if (*p1 != *p2)
+        return *p1 - *p2;
+      else
+	{
+	  ++p1;
+	  ++p2;
+	}
+    }
+  return *p1 - *p2;
+}
+
+static
+int compare (const struct cache_entry *e1, const struct cache_entry *e2)
+{
+  int res;
+  
+  /* We need to swap entries here to get the correct sort order.  */
+  res = cache_libcmp (e2->lib, e1->lib);
+  if (res == 0)
+    {
+      if (e1->flags < e2->flags)
+	return 1;
+      else if (e1->flags > e2->flags)
+	return -1;
+    }
+  return res;
+}
+
+
+/* Save the contents of the cache.  */
+void
+save_cache (const char *cache_name)
+{
+  struct cache_entry *entry;
+  int i, fd;
+  size_t total_strlen, len;
+  char *strings, *str, *temp_name;
+  struct cache_file *file_entries;
+  size_t file_entries_size;
+  unsigned int str_offset;
+  /* Number of cache entries.  */
+  int cache_entry_count = 0;
+
+  /* The cache entries are sorted already, save them in this order. */
+
+  /* Count the length of all strings.  */
+  total_strlen = 0;
+  for (entry = entries; entry != NULL; entry = entry->next)
+    {
+      /* Account the final NULs.  */
+      total_strlen += strlen (entry->lib) + strlen (entry->path) + 2;
+      ++cache_entry_count;
+    }
+  
+  /* Create the on disk cache structure.  */
+  /* First an array for all strings.  */
+  strings = (char *)xmalloc (total_strlen + 1);
+
+  /* And the list of all entries.  */
+  file_entries_size = sizeof (struct cache_file)
+    + cache_entry_count * sizeof (struct file_entry);
+  file_entries = (struct cache_file *) xmalloc (file_entries_size);
+
+  /* Fill in the header.  */
+  memset (file_entries, 0, sizeof (struct cache_file));
+  memcpy (file_entries->magic, CACHEMAGIC, sizeof CACHEMAGIC - 1);
+  
+  file_entries->nlibs = cache_entry_count;
+
+  str_offset = 0;
+  str = strings;
+  for (i = 0, entry = entries; entry != NULL; entry = entry->next, ++i)
+    {
+      file_entries->libs[i].flags = entry->flags;
+      /* First the library.  */
+      /* XXX: Actually we can optimize here and remove duplicates.  */
+      file_entries->libs[i].key = str_offset;
+      len = strlen (entry->lib);
+      str = stpcpy (str, entry->lib);
+      /* Account the final NUL.  */
+      ++str;
+      str_offset += len + 1;
+      /* Then the path.  */
+      file_entries->libs[i].value = str_offset;
+      len = strlen (entry->path);
+      str = stpcpy (str, entry->path);
+      /* Account the final NUL.  */
+      ++str;
+      str_offset += len + 1;
+    }
+  assert (str_offset == total_strlen);
+
+  /* Write out the cache.  */
+
+  /* Write cache first to a temporary file and rename it later.  */
+  temp_name = xmalloc (strlen (cache_name) + 2);
+  sprintf (temp_name, "%s~", cache_name);
+  /* First remove an old copy if it exists.  */
+  if (unlink (temp_name) && errno != ENOENT)
+    error (EXIT_FAILURE, errno, _("Can't remove old temporary cache file %s"),
+	   temp_name);
+
+  /* Create file.  */
+  fd = open (temp_name, O_CREAT|O_WRONLY|O_TRUNC|O_NOFOLLOW, 0644);
+  if (fd < 0)
+    error (EXIT_FAILURE, errno, _("Can't create temporary cache file %s"),
+	   temp_name);
+
+  /* Write contents.  */
+  if (write (fd, file_entries, file_entries_size) != (ssize_t)file_entries_size)
+    error (EXIT_FAILURE, errno, _("Writing of cache data failed"));
+
+  if (write (fd, strings, total_strlen) != (ssize_t)total_strlen)
+    error (EXIT_FAILURE, errno, _("Writing of cache data failed."));
+
+  close (fd);
+
+  /* Move temporary to its final location.  */
+  if (rename (temp_name, cache_name))
+    error (EXIT_FAILURE, errno, _("Renaming of %s to %s failed"), temp_name,
+	   cache_name);
+  
+  /* Free all allocated memory.  */
+  free (file_entries);
+  free (strings);
+
+  while (entries)
+    {
+      entry = entries;
+      free (entry->path);
+      free (entry->lib);
+      entries = entries->next;
+      free (entry);
+    }
+}
+
+/* Add one library to the cache.  */
+void
+add_to_cache (const char *path, const char *lib, int flags)
+{
+  struct cache_entry *new_entry, *ptr, *prev;
+  char *full_path;
+  int len;
+
+  new_entry = (struct cache_entry *) xmalloc (sizeof (struct cache_entry));
+
+  len = strlen (lib) + strlen (path) + 2;
+
+  full_path = (char *) xmalloc (len);
+  snprintf (full_path, len, "%s/%s", path, lib);
+  
+  new_entry->lib = xstrdup (lib);
+  new_entry->path = full_path;
+  new_entry->flags = flags;
+
+  /* Keep the list sorted - search for right place to insert.  */
+  ptr = entries;
+  prev = entries;
+  while (ptr != NULL)
+    {
+      if (compare (ptr, new_entry) > 0)
+	break;
+      prev = ptr;
+      ptr = ptr->next;
+    }
+  /* Is this the first entry?  */
+  if (ptr == entries)
+    {
+      new_entry->next = entries;
+      entries = new_entry;
+    }
+  else
+    {
+      new_entry->next = prev->next;
+      prev->next = new_entry;
+    }
+}