Update.

1998-08-25  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/generic/dl-cache.c: Move static variable cache and cachesize
	to toplevel.
	(_dl_unload_cache): New function.
	* elf/Versions [libc GLIBC_2.1]: Add _dl_unload_cache.
	* elf/dl-open.c (_dl_open): Unload map file before freeing the lock.
	* elf/rtld (dl_main): Unload map file before jumping to user code.

	* sysdeps/unix/sysv/linux/alpha/bits/fcntl.h: Define O_DIRECT.
	Correct comment for O_LARGEFILE.
	* sysdeps/unix/sysv/linux/bits/fcntl.h: Define O_DIRECT.
	Change O_LARGEFILE to correct value.

1998-08-25 14:34  Ulrich Drepper  <drepper@cygnus.com>

	* libio/iogetline.c (_IO_getline_info): Don't read anything for
	N == 0.  Patch by HJ Lu.

1 files changed, 20 insertions, 2 deletions

diff --git a/sysdeps/generic/dl-cache.c b/sysdeps/generic/dl-cache.c
index da7d2e49dd..f14cf96da1 100644
--- a/sysdeps/generic/dl-cache.c
+++ b/sysdeps/generic/dl-cache.c
@@ -44,6 +44,10 @@ struct cache_file
       } libs[0];
   };
 
+/* This is the starting address and the size of the mmap()ed file.  */
+static struct cache_file *cache;
+static size_t cachesize;
+
 /* This is the cache ID we expect.  Normally it is 3 for glibc linked
    binaries.  */
 int _dl_correct_cache_id = 3;
@@ -54,8 +58,6 @@ int _dl_correct_cache_id = 3;
 const char *
 _dl_load_cache_lookup (const char *name)
 {
-  static struct cache_file *cache;
-  static size_t cachesize;
   unsigned int i;
   const char *best;
 
@@ -114,3 +116,19 @@ _dl_load_cache_lookup (const char *name)
 
   return best;
 }
+
+#ifndef MAP_COPY
+/* If the system does not support MAP_COPY we cannot leave the file open
+   all the time since this would create problems when the file is replaced.
+   Therefore we provide this function to close the file and open it again
+   once needed.  */
+void
+_dl_unload_cache (void)
+{
+  if (cache != NULL && cache != (struct cache_file *) -1)
+    {
+      __munmap (cache, cachesize);
+      cache = NULL;
+    }
+}
+#endif