Add --list-archive FILE support to localedef.

This feature largely supports the integrated work

for InstLang support, and does not explicitly change

any help text or behaviour at the API level for these

routines. The basic purpose is to allow a file name to

propagate to through the internal APIs to be used instead

of the default locale archive. Given that build-locale-archive

links against copies of the internal API it can use these

non-public APIs without problem.

Author: Carlos O'Donell <carlos@redhat.com>

Date:   Mon Feb 24 22:33:35 2014 -0500

    Fix failure load locale template.

    The call to open_tmpl_archive was being passed a pointer to an

    object allocated on the stack. The object on the stack is not

    guaranteed to be initialized to zero so we need to minimally

    initialize `fname' in the struct locarhandle to ensure that

    open_tml_archive loads the default tempalte.

    This error was seen while debugging glibc installs in a qemu

    VM where it is more likely the stack pages were dirty. It has

    not been reported on non-VM systems.

Author: Carlos O'Donell <carlos@redhat.com>

Date:   Fri Oct 18 23:27:45 2013 -0400

    Allow fill_archive to be called with NULL fname.

    The fill_archive function should support being

    called with a NULL fname argument. A NULL fname

    argument indicates that the default archive should

    be opened. We enable this by setting ah.fname to

    NULL before initializing ah or calling open_archive.

    This way if fname is NULL then ah.fname remains NULL

    and open_archive opens the default archive.

Author: Carlos O'Donell <carlos@redhat.com>

Date:   Thu Oct 3 05:22:51 2013 -0400

[snip]

    - Support `--list-archive FILE' in localedef utility.

This landed upstream in:

commit 484c12fb1e3664fb434291234ea5787c5e3df4f5

Author: Carlos O'Donell <carlos@redhat.com>

Date:   Fri Oct 18 23:41:30 2013 -0400

    Enhance localedef --list-archive option.

    The localedef --list-archive option claims that it can

    accept a [file] argument and list the contents of that

    archive. The support was never implemented. This patch

    adds that support and allows --list-archive to work as

    expected. You can now use localedef to list the contents

    of arbitrary locale archives by using:

    ./localedef --list-archive file

The defaultfname flag was removed there, see

<https://sourceware.org/ml/libc-alpha/2013-10/msg00127.html>.

Index: glibc-2.17-c758a686/locale/locarchive.h

===================================================================

--- glibc-2.17-c758a686.orig/locale/locarchive.h

+++ glibc-2.17-c758a686/locale/locarchive.h

@@ -80,6 +80,8 @@ struct locrecent

 struct locarhandle

 {

+  /* Full path to the locale archive file.  */

+  const char *fname;

   int fd;

   void *addr;

   size_t mmaped;

Index: glibc-2.17-c758a686/locale/programs/localedef.c

===================================================================

--- glibc-2.17-c758a686.orig/locale/programs/localedef.c

+++ glibc-2.17-c758a686/locale/programs/localedef.c

@@ -202,7 +202,7 @@ main (int argc, char *argv[])

   /* Handle a few special cases.  */

   if (list_archive)

-    show_archive_content (verbose);

+    show_archive_content (remaining > 1 ? argv[remaining] : NULL, verbose);

   if (add_to_archive)

     return add_locales_to_archive (argc - remaining, &argv[remaining],

 				   replace_archive);

Index: glibc-2.17-c758a686/locale/programs/localedef.h

===================================================================

--- glibc-2.17-c758a686.orig/locale/programs/localedef.h

+++ glibc-2.17-c758a686/locale/programs/localedef.h

@@ -176,7 +176,8 @@ extern int add_locales_to_archive (size_

 /* Removed named locales from archive.  */

 extern int delete_locales_from_archive (size_t nlist, char *list[]);

-/* List content of locale archive.  */

-extern void show_archive_content (int verbose) __attribute__ ((noreturn));

+/* List content of locale archive. If FNAME is non-null use that as

+   the locale archive to list, otherwise the default.  */

+extern void show_archive_content (char *fname, int verbose) __attribute__ ((noreturn));

 #endif /* localedef.h */

Index: glibc-2.17-c758a686/locale/programs/locarchive.c

===================================================================

--- glibc-2.17-c758a686.orig/locale/programs/locarchive.c

+++ glibc-2.17-c758a686/locale/programs/locarchive.c

@@ -197,6 +197,7 @@ create_archive (const char *archivefname

 	     _("cannot change mode of new locale archive"));

     }

+  ah->fname = NULL;

   ah->fd = fd;

   ah->addr = p;

   ah->mmaped = total;

@@ -519,11 +520,19 @@ open_archive (struct locarhandle *ah, bo

   struct locarhead head;

   int retry = 0;

   size_t prefix_len = output_prefix ? strlen (output_prefix) : 0;

-  char archivefname[prefix_len + sizeof (ARCHIVE_NAME)];

-

-  if (output_prefix)

-    memcpy (archivefname, output_prefix, prefix_len);

-  strcpy (archivefname + prefix_len, ARCHIVE_NAME);

+  char fname[prefix_len + sizeof (ARCHIVE_NAME)];

+  char *archivefname = ah->fname;

+  bool defaultfname = false;

+

+  /* If ah has a non-NULL fname open that otherwise open the default.  */

+  if (archivefname == NULL)

+    {

+      defaultfname = true;

+      archivefname = fname;

+      if (output_prefix)

+        memcpy (archivefname, output_prefix, prefix_len);

+      strcpy (archivefname + prefix_len, ARCHIVE_NAME);

+    }

   while (1)

     {

@@ -531,8 +540,11 @@ open_archive (struct locarhandle *ah, bo

       fd = open64 (archivefname, readonly ? O_RDONLY : O_RDWR);

       if (fd == -1)

 	{

-	  /* Maybe the file does not yet exist.  */

-	  if (errno == ENOENT)

+	  /* Maybe the file does not yet exist? If we are opening

+	     the default locale archive we ignore the failure and

+	     list an empty archive, otherwise we print an error

+	     and exit.  */

+	  if (errno == ENOENT && defaultfname)

 	    {

 	      if (readonly)

 		{

@@ -1258,6 +1270,7 @@ add_locales_to_archive (nlist, list, rep

   /* Open the archive.  This call never returns if we cannot

      successfully open the archive.  */

+  ah.fname = NULL;

   open_archive (&ah, false);

   while (nlist-- > 0)

@@ -1457,6 +1470,7 @@ delete_locales_from_archive (nlist, list

   /* Open the archive.  This call never returns if we cannot

      successfully open the archive.  */

+  ah.fname = NULL;

   open_archive (&ah, false);

   head = ah.addr;

@@ -1545,7 +1559,7 @@ dataentcmp (const void *a, const void *b

 void

-show_archive_content (int verbose)

+show_archive_content (char *fname, int verbose)

 {

   struct locarhandle ah;

   struct locarhead *head;

@@ -1555,6 +1569,7 @@ show_archive_content (int verbose)

   /* Open the archive.  This call never returns if we cannot

      successfully open the archive.  */

+  ah.fname = fname;

   open_archive (&ah, true);

   head = ah.addr;

Index: glibc-2.17-c758a686/locale/programs/locfile.c

===================================================================

--- glibc-2.17-c758a686.orig/locale/programs/locfile.c

+++ glibc-2.17-c758a686/locale/programs/locfile.c

@@ -337,6 +337,7 @@ write_all_categories (struct localedef_t

       /* Open the archive.  This call never returns if we cannot

 	 successfully open the archive.  */

+      ah.fname = NULL;

       open_archive (&ah, false);

       if (add_locale_to_archive (&ah, locname, to_archive, true) != 0)