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.

1 files changed, 160 insertions, 0 deletions

diff --git a/elf/readlib.c b/elf/readlib.c
new file mode 100644
index 0000000000..e6d0619091
--- /dev/null
+++ b/elf/readlib.c
@@ -0,0 +1,160 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Jaeger <aj@suse.de>, 1999 and
+		  Jakub Jelinek <jakub@redhat.com>, 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.  */
+
+/* The code in this file and in readelflib is a heavily simplified
+   version of the readelf program that's part of the current binutils
+   development version.  Besides the simplification, it has also been
+   modified to read some other file formats.  */
+
+
+#include <a.out.h>
+#include <elf.h>
+#include <error.h>
+#include <link.h>
+#include <libintl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include "ldconfig.h"
+
+#define Elf32_CLASS ELFCLASS32
+#define Elf64_CLASS ELFCLASS64
+
+struct known_names
+{
+  const char *soname;
+  int flag;
+};
+
+static struct known_names interpreters [] =
+{
+  {"/lib/ld-linux.so.2", FLAG_ELF_LIBC6},
+  {"/lib/ld-linux.so.1", FLAG_ELF_LIBC5}
+};
+
+static struct known_names known_libs [] =
+{
+  {"libc.so.6", FLAG_ELF_LIBC6},
+  {"libc.so.5", FLAG_ELF_LIBC5},
+  {"libm.so.6", FLAG_ELF_LIBC6},
+  {"libm.so.5", FLAG_ELF_LIBC5}
+};
+
+
+
+/* Returns 0 if everything is ok, != 0 in case of error.  */
+int
+process_file (const char *file_name, const char *lib, int *flag, char **soname, int is_link)
+{
+  FILE *file;
+  struct stat statbuf;
+  void *file_contents;
+  int ret;
+  
+  ElfW(Ehdr) *elf_header;
+  struct exec *aout_header;
+
+  ret = 0;
+  *flag = FLAG_ANY;
+  *soname = NULL;
+
+  file = fopen (file_name, "rb");
+  if (file == NULL)
+    {
+      /* No error for stale symlink.  */
+      if (is_link && strstr (file_name, ".so.") != NULL)
+	return 1;
+      error (0, 0, _("Input file %s not found.\n"), file_name);
+      return 1;
+    }
+
+  if (fstat (fileno (file), &statbuf) < 0)
+    {
+      error (0, 0, _("Cannot fstat file %s.\n"), file_name);
+      return 1;
+    }
+
+  file_contents = mmap (0, statbuf.st_size, PROT_READ, MAP_SHARED, fileno (file), 0);
+  if (file_contents == MAP_FAILED)
+    {
+      error (0, 0, _("Cannot mmap file %s.\n"), file_name);
+      fclose (file);
+      return 1;
+    }
+
+  /* First check if this is an aout file.  */
+  aout_header = (struct exec *) file_contents;
+  if (N_MAGIC (*aout_header) == ZMAGIC
+      || N_MAGIC (*aout_header) == QMAGIC)
+    {
+      /* Aout files don't have a soname, just return the the name
+         including the major number.  */
+      char *copy, *major, *dot;
+      copy = xstrdup (lib);
+      major = strstr (copy, ".so.");
+      if (major)
+	{
+	  dot = strstr (major + 4, ".");
+	  if (dot)
+	    *dot = '\0';
+	}
+      *soname = copy;
+      *flag = FLAG_LIBC4;
+      goto done;
+    }
+  
+  elf_header = (ElfW(Ehdr) *) file_contents;
+  if (elf_header->e_ident [EI_MAG0] != ELFMAG0
+      || elf_header->e_ident [EI_MAG1] != ELFMAG1
+      || elf_header->e_ident [EI_MAG2] != ELFMAG2
+      || elf_header->e_ident [EI_MAG3] != ELFMAG3)
+    {
+      /* The file is neither ELF nor aout.  Check if it's a linker script,
+	 like libc.so - otherwise complain.  */
+      int len = statbuf.st_size;
+      /* Only search the beginning of the file.  */
+      if (len > 512)
+	len = 512;
+      if (memmem (file_contents, len, "GROUP", 5) == NULL
+	  && memmem (file_contents, len, "GNU ld script", 13) == NULL)
+	error (0, 0, _("%s is not an ELF file - it has the wrong magic bytes at the start.\n"),
+	       file_name);
+      ret = 1;
+      goto done;
+    }
+
+  if (process_elf_file (file_name, lib, flag, soname, file_contents))
+    ret = 1;
+
+ done:
+  /* Clean up allocated memory and resources.  */
+  munmap (file_contents, statbuf.st_size);
+  fclose (file);
+
+  return ret;
+}
+
+/* Get architecture specific version of process_elf_file.  */
+#include "readelflib.c"
+