Arrange to set the LC_XXX environment variables to match our locale setup.

Back-patch of previous fix in HEAD for plperl-vs-locale issue.

src/backend/access/transam/xlog.c

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.109.2.5 2005/05/31 19:11:14 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.109.2.6 2006/01/05 00:55:35 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -37,6 +37,7 @@
 #include "storage/sinval.h"
 #include "storage/spin.h"
 #include "utils/builtins.h"
+#include "utils/pg_locale.h"
 #include "utils/relcache.h"
 #include "miscadmin.h"
 
@@ -2283,13 +2284,13 @@ ReadControlFile(void)
 			 "\tIt looks like you need to initdb.",
 			 ControlFile->localeBuflen, LOCALE_NAME_BUFLEN);
 
-	if (setlocale(LC_COLLATE, ControlFile->lc_collate) == NULL)
+	if (pg_perm_setlocale(LC_COLLATE, ControlFile->lc_collate) == NULL)
 		elog(PANIC,
 		   "The database cluster was initialized with LC_COLLATE '%s',\n"
 			 "\twhich is not recognized by setlocale().\n"
 			 "\tIt looks like you need to initdb.",
 			 ControlFile->lc_collate);
-	if (setlocale(LC_CTYPE, ControlFile->lc_ctype) == NULL)
+	if (pg_perm_setlocale(LC_CTYPE, ControlFile->lc_ctype) == NULL)
 		elog(PANIC,
 			 "The database cluster was initialized with LC_CTYPE '%s',\n"
 			 "\twhich is not recognized by setlocale().\n"

src/backend/main/main.c

@@ -13,7 +13,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/main/main.c,v 1.55 2002/10/31 22:37:19 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/main/main.c,v 1.55.2.1 2006/01/05 00:55:36 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -38,6 +38,7 @@
 #include "miscadmin.h"
 #include "bootstrap/bootstrap.h"
 #include "tcop/tcopprot.h"
+#include "utils/pg_locale.h"
 #include "utils/ps_status.h"
 
 
@@ -130,19 +131,26 @@ main(int argc, char *argv[])
 	 * get already localized behavior during startup (e.g., error
 	 * messages).
 	 */
-	setlocale(LC_COLLATE, "");
+	pg_perm_setlocale(LC_COLLATE, "");
-	setlocale(LC_CTYPE, "");
+	pg_perm_setlocale(LC_CTYPE, "");
 #ifdef LC_MESSAGES
-	setlocale(LC_MESSAGES, "");
+	pg_perm_setlocale(LC_MESSAGES, "");
 #endif
 
 	/*
 	 * We don't use these during startup.  See also pg_locale.c about why
 	 * these are set to "C".
 	 */
-	setlocale(LC_MONETARY, "C");
+	pg_perm_setlocale(LC_MONETARY, "C");
-	setlocale(LC_NUMERIC, "C");
+	pg_perm_setlocale(LC_NUMERIC, "C");
-	setlocale(LC_TIME, "C");
+	pg_perm_setlocale(LC_TIME, "C");
+
+	/*
+	 * Now that we have absorbed as much as we wish to from the locale
+	 * environment, remove any LC_ALL setting, so that the environment
+	 * variables installed by pg_perm_setlocale have force.
+	 */
+	unsetenv("LC_ALL");
 
 #ifdef ENABLE_NLS
 	bindtextdomain("postgres", LOCALEDIR);

src/backend/utils/adt/pg_locale.c

@@ -4,7 +4,7 @@
  *
  * Portions Copyright (c) 2002, PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.20 2002/10/18 20:44:02 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/pg_locale.c,v 1.20.2.1 2006/01/05 00:55:36 tgl Exp $
  *
  *-----------------------------------------------------------------------
  */
@@ -50,13 +50,10 @@
 
 #include <locale.h>
 
+#include "catalog/pg_control.h"
 #include "utils/pg_locale.h"
 
 
-/* indicated whether locale information cache is valid */
-static bool CurrentLocaleConvValid = false;
-
-
 /* GUC storage area */
 
 char	   *locale_messages;
@@ -64,6 +61,120 @@ char	   *locale_monetary;
 char	   *locale_numeric;
 char	   *locale_time;
 
+/* indicates whether locale information cache is valid */
+static bool CurrentLocaleConvValid = false;
+
+/* Environment variable storage area */
+
+#define LC_ENV_BUFSIZE (LOCALE_NAME_BUFLEN + 20)
+
+static char lc_collate_envbuf[LC_ENV_BUFSIZE];
+static char lc_ctype_envbuf[LC_ENV_BUFSIZE];
+#ifdef LC_MESSAGES
+static char lc_messages_envbuf[LC_ENV_BUFSIZE];
+#endif
+static char lc_monetary_envbuf[LC_ENV_BUFSIZE];
+static char lc_numeric_envbuf[LC_ENV_BUFSIZE];
+static char lc_time_envbuf[LC_ENV_BUFSIZE];
+
+
+/*
+ * pg_perm_setlocale
+ *
+ * This is identical to the libc function setlocale(), with the addition
+ * that if the operation is successful, the corresponding LC_XXX environment
+ * variable is set to match.  By setting the environment variable, we ensure
+ * that any subsequent use of setlocale(..., "") will preserve the settings
+ * made through this routine.  Of course, LC_ALL must also be unset to fully
+ * ensure that, but that has to be done elsewhere after all the individual
+ * LC_XXX variables have been set correctly.  (Thank you Perl for making this
+ * kluge necessary.)
+ */
+char *
+pg_perm_setlocale(int category, const char *locale)
+{
+	char   *result;
+	const char *envvar;
+	char   *envbuf;
+
+#ifndef WIN32
+	result = setlocale(category, locale);
+#else
+	/*
+	 * On Windows, setlocale(LC_MESSAGES) does not work, so just assume
+	 * that the given value is good and set it in the environment variables.
+	 * We must ignore attempts to set to "", which means "keep using the
+	 * old environment value".
+	 */
+#ifdef LC_MESSAGES
+	if (category == LC_MESSAGES)
+	{
+		result = (char *) locale;
+		if (locale == NULL || locale[0] == '\0')
+			return result;
+	}
+	else
+#endif
+		result = setlocale(category, locale);
+#endif /* WIN32 */
+
+	if (result == NULL)
+		return result;			/* fall out immediately on failure */
+
+	switch (category)
+	{
+		case LC_COLLATE:
+			envvar = "LC_COLLATE";
+			envbuf = lc_collate_envbuf;
+			break;
+		case LC_CTYPE:
+			envvar = "LC_CTYPE";
+			envbuf = lc_ctype_envbuf;
+			break;
+#ifdef LC_MESSAGES
+		case LC_MESSAGES:
+			envvar = "LC_MESSAGES";
+			envbuf = lc_messages_envbuf;
+			break;
+#endif
+		case LC_MONETARY:
+			envvar = "LC_MONETARY";
+			envbuf = lc_monetary_envbuf;
+			break;
+		case LC_NUMERIC:
+			envvar = "LC_NUMERIC";
+			envbuf = lc_numeric_envbuf;
+			break;
+		case LC_TIME:
+			envvar = "LC_TIME";
+			envbuf = lc_time_envbuf;
+			break;
+		default:
+			elog(FATAL, "unrecognized LC category: %d", category);
+			envvar = NULL;		/* keep compiler quiet */
+			envbuf = NULL;
+			break;
+	}
+
+	snprintf(envbuf, LC_ENV_BUFSIZE-1, "%s=%s", envvar, result);
+
+#ifndef WIN32
+	if (putenv(envbuf))
+		return NULL;
+#else
+	/*
+	 * On Windows, we need to modify both the process environment and the
+	 * cached version in msvcrt
+	 */
+	if (!SetEnvironmentVariable(envvar, result))
+		return NULL;
+	if (_putenv(envbuf))
+		return NULL;
+#endif
+
+	return result;
+}
+
 
 /* GUC assign hooks */
 
@@ -130,7 +241,7 @@ locale_messages_assign(const char *value, bool doit, bool interactive)
 #ifdef LC_MESSAGES
 	if (doit)
 	{
-		if (!setlocale(LC_MESSAGES, value))
+		if (!pg_perm_setlocale(LC_MESSAGES, value))
 			return NULL;
 	}
 	else

src/include/utils/pg_locale.h

@@ -2,7 +2,7 @@
  *
  * PostgreSQL locale utilities
  *
- * $Id: pg_locale.h,v 1.14 2002/09/04 20:31:45 momjian Exp $
+ * $Id: pg_locale.h,v 1.14.2.1 2006/01/05 00:55:36 tgl Exp $
  *
  * Copyright (c) 2002, PostgreSQL Global Development Group
  *
@@ -28,6 +28,8 @@ extern const char *locale_numeric_assign(const char *value,
 extern const char *locale_time_assign(const char *value,
 				   bool doit, bool interactive);
 
+extern char *pg_perm_setlocale(int category, const char *locale);
+
 extern bool lc_collate_is_c(void);
 
 /*