* locale/loadarchive.c (_nl_load_locale_from_archive): Parse locale

	name to find codeset name (if any) and normalize it.  If the
	normalized name differs, look up only that in the archive.
	* locale/programs/locarchive.c (add_locale_to_archive): If the name
	contains a codeset, normalize the codeset store only the normalized
	name in the archive.  If not, add an alias containing the locale's
	normalized codeset name.  Apply codeset name normalization when
	matching entries in the alias file.

	* locale/programs/locarchive.c (delete_locales_from_archive): Don't
	decrement HEAD->namehash_used here.
	(add_locale): Only need to insert name string when name_offset != 0.

	* locale/programs/localedef.c (options): Add -A/--alias-file.
	(alias_file): New variable.
	(parse_opt): Grok -A, set that.
	* locale/programs/localedef.h: Declare it.

	* locale/programs/locarchive.c (insert_name): New function, broken out
	of ...
	(add_locale_to_archive): ... here.  Call that.
	(add_alias): New function.
	(add_locale): New static function, add_locale_to_archive renamed.
	(add_locale_to_archive): Call that and use add_alias to add an alias
	for the name with codeset if the given name lacks it.
	(enlarge_archive): Call add_locale instead of add_locale_to_archive.

	* locale/Makefile (routines): Add loadarchive.
	* locale/loadarchive.c: New file, started from code by Ulrich Drepper.
	(_nl_load_locale_from_archive): New function.
	* locale/localeinfo.h: Declare it.
	* locale/findlocale.c (_nl_find_locale): If using default locale path,
	try _nl_load_locale_from_archive first.

	* locale/loadlocale.c (_nl_intern_locale_data): New function,
	broken out of _nl_load_locale.
	(_nl_load_locale): Call that.
	* locale/localeinfo.h: Declare it.
	(struct locale_data): Replace member `mmaped' with `alloc', an enum.
	(struct locale_data): Remove unused member `options'.
	* locale/findlocale.c (_nl_remove_locale): Update uses.
	* locale/loadlocale.c (_nl_load_locale, _nl_unload_locale): Likewise.
	* locale/C-collate.c: Update initializer.
	* locale/C-identification.c: Likewise.
	* locale/C-measurement.c: Likewise.
	* locale/C-telephone.c: Likewise.
	* locale/C-address.c: Likewise.
	* locale/C-name.c: Likewise.
	* locale/C-paper.c: Likewise.
	* locale/C-time.c: Likewise.
	* locale/C-numeric.c: Likewise.
	* locale/C-monetary.c: Likewise.
	* locale/C-messages.c : Likewise.
	* locale/C-ctype.c: Likewise.

	* locale/hashval.h [! LONGBITS]: Include <limits.h> here and
	use CHAR_BIT instead of BITSPERBYTE.

	* locale/localeinfo.h (_nl_find_locale, _nl_load_locale,
	_nl_unload_locale): Add `internal_function attribute_hidden' to decls.
	* locale/findlocale.c (_nl_find_locale): Add internal_function to defn.
	(_nl_remove_locale): Likewise.
	* locale/loadlocale.c (_nl_load_locale, _nl_unload_locale): Likewise.

	* locale/findlocale.c (_nl_default_locale_path): New variable.
	(_nl_find_locale): If LOCALE_PATH is null, default to that.
	* locale/localeinfo.h: Declare it.
	* locale/setlocale.c (setlocale): Use _nl_default_locale_path
	in place of LOCALEDIR.  If no LOCPATH, pass null to _nl_find_locale.
	* locale/newlocale.c (__newlocale): Likewise.

	* misc/err.c (vwarnx, vwarn): Fix typos in libc_hidden_def uses.
	* inet/rexec.c (rexec_af): Add libc_hidden_def.
	* sysdeps/generic/morecore.c: Likewise.
	* signal/allocrtsig.c (__libc_current_sigrtmin): Likewise.
	(__libc_current_sigrtmax): Likewise.

2002-08-08  Roland McGrath  <roland@redhat.com>

	* locale/loadlocale.c (_nl_load_locale): Don't use MAP_INHERIT.
	* catgets/open_catalog.c (__open_catalog): Likewise.

	* locale/programs/locarchive.c (INITIAL_NUM_NAMES): Renamed
	from typo INITIAL_NUM_NANES.
	(create_archive): Update use.

1 files changed, 447 insertions, 0 deletions

diff --git a/locale/loadarchive.c b/locale/loadarchive.c
new file mode 100644
index 0000000000..08e5f94905
--- /dev/null
+++ b/locale/loadarchive.c
@@ -0,0 +1,447 @@
+/* Code to load locale data from the locale archive file.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <locale.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <assert.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+
+#include "localeinfo.h"
+#include "locarchive.h"
+
+/* Define the hash function.  We define the function as static inline.  */
+#define compute_hashval static inline compute_hashval
+#include "hashval.h"
+#undef compute_hashval
+
+#undef LOCALEDIR
+#define LOCALEDIR "/spare/roland/tmp/usr/lib/locale/"
+
+/* Name of the locale archive file.  */
+static const char archfname[] = LOCALEDIR "locale-archive";
+
+
+/* Record of contiguous pages already mapped from the locale archive.  */
+struct archmapped
+{
+  void *ptr;
+  uint32_t from;
+  uint32_t len;
+  struct archmapped *next;
+};
+static struct archmapped *archmapped;
+
+/* This describes the mapping at the beginning of the file that contains
+   the header data.  There could be data in the following partial page,
+   so this is searched like any other.  Once the archive has been used,
+   ARCHMAPPED points to this; if mapping the archive header failed,
+   then headmap.ptr is null.  */
+static struct archmapped headmap;
+static struct stat64 archive_stat; /* stat of archive when header mapped.  */
+
+/* Record of locales that we have already loaded from the archive.  */
+struct locale_in_archive
+{
+  struct locale_in_archive *next;
+  const char *name;
+  struct locale_data *data[__LC_LAST];
+};
+static struct locale_in_archive *archloaded;
+
+
+/* Local structure and subroutine of _nl_load_archive, see below.  */
+struct range
+{
+  uint32_t from;
+  uint32_t len;
+  int category;
+  void *result;
+};
+
+static int
+rangecmp (const void *p1, const void *p2)
+{
+  return ((struct range *) p1)->from - ((struct range *) p2)->from;
+}
+
+
+/* Calculate the amount of space needed for all the tables described
+   by the given header.  Note we do not include the empty table space
+   that has been preallocated in the file, so our mapping may not be
+   large enough if localedef adds data to the file in place.  However,
+   doing that would permute the header fields while we are accessing
+   them and thus not be safe anyway, so we don't allow for that.  */
+static inline off_t
+calculate_head_size (const struct locarhead *h)
+{
+  off_t namehash_end = (h->namehash_offset
+			+ h->namehash_size * sizeof (struct namehashent));
+  off_t string_end =  h->string_offset + h->string_used;
+  off_t locrectab_end = (h->locrectab_offset
+			 + h->locrectab_used * sizeof (struct locrecent));
+  return MAX (namehash_end, MAX (string_end, locrectab_end));
+}
+
+
+/* Find the locale *NAMEP in the locale archive, and return the
+   internalized data structure for its CATEGORY data.  If this locale has
+   already been loaded from the archive, just returns the existing data
+   structure.  If successful, sets *NAMEP to point directly into the mapped
+   archive string table; that way, the next call can short-circuit strcmp.  */
+struct locale_data *
+internal_function
+_nl_load_locale_from_archive (int category, const char **namep)
+{
+  const char *name = *namep;
+  struct
+  {
+    void *addr;
+    size_t len;
+  } results[__LC_LAST];
+  struct locale_in_archive *lia;
+  struct locarhead *head;
+  struct namehashent *namehashtab;
+  struct locrecent *locrec;
+  struct archmapped *mapped;
+  struct archmapped *last;
+  unsigned long int hval;
+  size_t idx;
+  size_t incr;
+  struct range ranges[__LC_LAST - 1];
+  int nranges;
+  int cnt;
+  size_t ps = __sysconf (_SC_PAGE_SIZE);
+  int fd = -1;
+
+  /* Check if we have already loaded this locale from the archive.
+     If we previously loaded the locale but found bogons in the data,
+     then we will have stored a null pointer to return here.  */
+  for (lia = archloaded; lia != NULL; lia = lia->next)
+    if (name == lia->name || !strcmp (name, lia->name))
+      {
+	*namep = lia->name;
+	return lia->data[category];
+      }
+
+  {
+    /* If the name contains a codeset, then we normalize the name before
+       doing the lookup.  */
+    const char *p = strchr (name, '.');
+    if (p != NULL && p[1] != '@' && p[1] != '\0')
+      {
+	const char *rest = __strchrnul (++p, '@');
+	const char *normalized_codeset = _nl_normalize_codeset (p, rest - p);
+	if (normalized_codeset == NULL)	/* malloc failure */
+	  return NULL;
+	if (strncmp (normalized_codeset, p, rest - p) != 0
+	    || normalized_codeset[rest - p] != '\0')
+	  {
+	    /* There is a normalized codeset name that is different from
+	       what was specified; reconstruct a new locale name using it.  */
+	    size_t normlen = strlen (normalized_codeset);
+	    size_t restlen = strlen (rest) + 1;
+	    char *newname = alloca (p - name + normlen + restlen);
+	    memcpy (__mempcpy (__mempcpy (newname, name, p - name),
+			       normalized_codeset, normlen),
+		    rest, restlen);
+	    free ((char *) normalized_codeset);
+	    name = newname;
+	  }
+      }
+  }
+
+  /* Make sure the archive is loaded.  */
+  if (archmapped == NULL)
+    {
+      /* We do this early as a sign that we have tried to open the archive.
+	 If headmap.ptr remains null, that's an indication that we tried
+	 and failed, so we won't try again.  */
+      archmapped = &headmap;
+
+      /* The archive has never been opened.  */
+      fd = __open64 (archfname, O_RDONLY);
+      if (fd < 0)
+	/* Cannot open the archive, for whatever reason.  */
+	return NULL;
+
+      if (__fxstat64 (_STAT_VER, fd, &archive_stat) == -1)
+	{
+	  /* stat failed, very strange.  */
+	close_and_out:
+	  __close (fd);
+	  return NULL;
+	}
+
+      if (sizeof (void *) > 4)
+	{
+	  /* We will just map the whole file, what the hell.  */
+	  void *result = __mmap64 (NULL, archive_stat.st_size,
+				   PROT_READ, MAP_SHARED, fd, 0);
+	  if (result == MAP_FAILED)
+	    goto close_and_out;
+	  /* Check whether the file is large enough for the sizes given in the
+	     header.  */
+	  if (calculate_head_size ((const struct locarhead *) result)
+	      > archive_stat.st_size)
+	    {
+	      (void) munmap (result, archive_stat.st_size);
+	      goto close_and_out;
+	    }
+	  __close (fd);
+	  fd = -1;
+
+	  headmap.ptr = result;
+	  /* headmap.from already initialized to zero.  */
+	  headmap.len = archive_stat.st_size;
+	}
+      else
+	{
+	  struct locarhead head;
+	  off_t head_size;
+	  void *result;
+
+	  if (TEMP_FAILURE_RETRY (__read (fd, &head, sizeof (head)))
+	      != sizeof (head))
+	    goto close_and_out;
+	  head_size = calculate_head_size (&head);
+	  if (head_size > archive_stat.st_size)
+	    goto close_and_out;
+	  result = __mmap64 (NULL, head_size, PROT_READ, MAP_SHARED, fd, 0);
+	  if (result == MAP_FAILED)
+	    goto close_and_out;
+
+	  /* Record that we have mapped the initial pages of the file.  */
+	  headmap.ptr = result;
+	  headmap.len = MIN ((head_size + ps - 1) & ~(ps - 1),
+			     archive_stat.st_size);
+	}
+    }
+
+  /* If there is no archive or it cannot be loaded for some reason fail.  */
+  if (__builtin_expect (headmap.ptr == NULL, 0))
+    return NULL;
+
+  /* We have the archive available.  To find the name we first have to
+     determine its hash value.  */
+  hval = compute_hashval (name, strlen (name));
+
+  head = headmap.ptr;
+  namehashtab = (struct namehashent *) ((char *) head
+					+ head->namehash_offset);
+
+  idx = hval % head->namehash_size;
+  incr = 1 + hval % (head->namehash_size - 2);
+
+  /* If the name_offset field is zero this means this is a
+     deleted entry and therefore no entry can be found.  */
+  while (1)
+    {
+      if (namehashtab[idx].name_offset == 0)
+	/* Not found.  */
+	return NULL;
+
+      if (namehashtab[idx].hashval == hval
+	  && strcmp (name, headmap.ptr + namehashtab[idx].name_offset) == 0)
+	/* Found the entry.  */
+	break;
+
+      idx += incr;
+      if (idx >= head->namehash_size)
+	idx -= head->namehash_size;
+    }
+
+  /* We found an entry.  It might be a placeholder for a removed one.  */
+  if (namehashtab[idx].locrec_offset == 0)
+    return NULL;
+
+  locrec = (struct locrecent *) (headmap.ptr + namehashtab[idx].locrec_offset);
+
+  if (sizeof (void *) > 4 /* || headmap.len == archive_stat.st_size */)
+    {
+      /* We already have the whole locale archive mapped in.  */
+      assert (headmap.len == archive_stat.st_size);
+      for (cnt = 0; cnt < __LC_LAST; ++cnt)
+	if (cnt != LC_ALL)
+	  {
+	    if (locrec->record[cnt].offset + locrec->record[cnt].len
+		> headmap.len)
+	      /* The archive locrectab contains bogus offsets.  */
+	      return NULL;
+	    results[cnt].addr = headmap.ptr + locrec->record[cnt].offset;
+	    results[cnt].len = locrec->record[cnt].len;
+	  }
+    }
+  else
+    {
+      /* Get the offsets of the data files and sort them.  */
+      for (cnt = nranges = 0; cnt < __LC_LAST; ++cnt)
+	if (cnt != LC_ALL)
+	  {
+	    ranges[nranges].from = locrec->record[cnt].offset;
+	    ranges[nranges].len = locrec->record[cnt].len;
+	    ranges[nranges].category = cnt;
+	    ranges[nranges].result = NULL;
+
+	    ++nranges;
+	  }
+
+      qsort (ranges, nranges, sizeof (ranges[0]), rangecmp);
+
+      /* The information about mmap'd blocks is kept in a list.
+	 Skip over the blocks which are before the data we need.  */
+      last = mapped = archmapped;
+      for (cnt = 0; cnt < nranges; ++cnt)
+	{
+	  int upper;
+	  size_t from;
+	  size_t to;
+	  void *addr;
+	  struct archmapped *newp;
+
+	  /* Determine whether the appropriate page is already mapped.  */
+	  while (mapped != NULL
+		 && mapped->from + mapped->len <= ranges[cnt].from)
+	    {
+	      last = mapped;
+	      mapped = mapped->next;
+	    }
+
+	  /* Do we have a match?  */
+	  if (mapped != NULL
+	      && mapped->from <= ranges[cnt].from
+	      && ((char *) ranges[cnt].from + ranges[cnt].len
+		  <= (char *) mapped->from + mapped->len))
+	    {
+	      /* Yep, already loaded.  */
+	      results[ranges[cnt].category].addr = ((char *) mapped->ptr
+						    + ranges[cnt].from
+						    - mapped->from);
+	      results[ranges[cnt].category].len = ranges[cnt].len;
+	      continue;
+	    }
+
+	  /* Map the range with the locale data from the file.  We will
+	     try to cover as much of the locale as possible.  I.e., if the
+	     next category (next as in "next offset") is on the current or
+	     immediately following page we use it as well.  */
+	  assert (powerof2 (ps));
+	  from = ranges[cnt].from & ~(ps - 1);
+	  upper = cnt;
+	  do
+	    {
+	      to = ((ranges[upper].from + ranges[upper].len + ps - 1)
+		    & ~(ps - 1));
+	      ++upper;
+	    }
+	  /* Loop while still in contiguous pages. */
+	  while (upper < nranges && ranges[upper].from < to + ps);
+
+	  if (to > archive_stat.st_size)
+	    /* The archive locrectab contains bogus offsets.  */
+	    return NULL;
+
+	  /* Open the file if it hasn't happened yet.  */
+	  if (fd == -1)
+	    {
+	      struct stat64 st;
+	      fd = __open64 (archfname, O_RDONLY);
+	      if (fd == -1)
+		/* Cannot open the archive, for whatever reason.  */
+		return NULL;
+	      /* Now verify we think this is really the same archive file
+		 we opened before.  If it has been changed we cannot trust
+		 the header we read previously.  */
+	      if (__fxstat64 (_STAT_VER, fd, &st) < 0
+		  || st.st_size != archive_stat.st_size
+		  || st.st_mtime != archive_stat.st_mtime
+		  || st.st_dev != archive_stat.st_dev
+		  || st.st_ino != archive_stat.st_ino)
+		return NULL;
+	    }
+
+	  /* Map the range from the archive.  */
+	  addr = __mmap64 (NULL, to - from, PROT_READ, MAP_SHARED, fd, from);
+	  if (addr == MAP_FAILED)
+	    return NULL;
+
+	  /* Allocate a record for this mapping.  */
+	  newp = (struct archmapped *) malloc (sizeof (struct archmapped));
+	  if (newp == NULL)
+	    {
+	      (void) munmap (addr, to - from);
+	      return NULL;
+	    }
+
+	  /* And queue it.  */
+	  newp->ptr = addr;
+	  newp->from = from;
+	  newp->len = to - from;
+	  assert (last->next == mapped);
+	  newp->next = mapped;
+	  last->next = newp;
+	  last = newp;
+
+	  /* Determine the load addresses for the category data.  */
+	  do
+	    {
+	      assert (ranges[cnt].from >= from);
+	      results[ranges[cnt].category].addr = ((char *) addr
+						    + ranges[cnt].from - from);
+	      results[ranges[cnt].category].len = ranges[cnt].len;
+	    }
+	  while (++cnt < upper);
+	  --cnt;		/* The 'for' will increase 'cnt' again.  */
+	}
+    }
+
+  /* We succeeded in mapping all the necessary regions of the archive.
+     Now we need the expected data structures to point into the data.  */
+
+  lia = malloc (sizeof *lia);
+  if (__builtin_expect (lia == NULL, 0))
+    return NULL;
+
+  lia->name = headmap.ptr + namehashtab[idx].name_offset;
+  lia->next = archloaded;
+  archloaded = lia;
+
+  for (cnt = 0; cnt < __LC_LAST; ++cnt)
+    if (cnt != LC_ALL)
+      {
+	lia->data[cnt] = _nl_intern_locale_data (cnt,
+						 results[cnt].addr,
+						 results[cnt].len);
+	if (__builtin_expect (lia->data[cnt] != NULL, 1))
+	  {
+	    /* _nl_intern_locale_data leaves us these fields to initialize.  */
+	    lia->data[cnt]->alloc = ld_archive;
+	    lia->data[cnt]->name = lia->name;
+	  }
+      }
+
+  *namep = lia->name;
+  return lia->data[category];
+}