MFC r304703, r304755

1) _locale.h
LC_*_MASK bit shifting order was partially broken from the initial commit
time at year 2012. Only LC_COLLATE_MASK and LC_CTYPE_MASK are in the
right order.

The order here should match XLC_* from "xlocale_private.h" which, in turn,
match LC_* publicly visible order from <locale.h> which determines how
locale components are stored in the structure.
LC_*_MASK -> XLC_* translation done as "ffs(mask) - 1" in the querylocale()
and equivalent shift loop in the newlocale(), so mapped to some wrong
components (excluding two mentioned above).

Formally the fix is ABI breakage, but old code using those masks
never works properly in any case.
Only newlocale() and querylocale() are affected.

2) msgcat.c
Use current locale (f.e. set by thread). It was global locale always
previously.

PR:     211743

2 files changed, 10 insertions, 9 deletions

diff --git a/include/xlocale/_locale.h b/include/xlocale/_locale.h
index f8aafb8..2b4387b 100644
--- a/include/xlocale/_locale.h
+++ b/include/xlocale/_locale.h
@@ -32,12 +32,13 @@
 #ifndef _XLOCALE_LOCALE_H
 #define _XLOCALE_LOCALE_H
 
+/* Bit shifting order of LC_*_MASK should match XLC_* and LC_* order. */
 #define LC_COLLATE_MASK  (1<<0)
 #define LC_CTYPE_MASK    (1<<1)
-#define LC_MESSAGES_MASK (1<<2)
-#define LC_MONETARY_MASK (1<<3)
-#define LC_NUMERIC_MASK  (1<<4)
-#define LC_TIME_MASK     (1<<5)
+#define LC_MONETARY_MASK (1<<2)
+#define LC_NUMERIC_MASK  (1<<3)
+#define LC_TIME_MASK     (1<<4)
+#define LC_MESSAGES_MASK (1<<5)
 #define LC_ALL_MASK      (LC_COLLATE_MASK | LC_CTYPE_MASK | LC_MESSAGES_MASK | \
 			  LC_MONETARY_MASK | LC_NUMERIC_MASK | LC_TIME_MASK)
 #define LC_GLOBAL_LOCALE ((locale_t)-1)
diff --git a/lib/libc/nls/msgcat.c b/lib/libc/nls/msgcat.c
index 3df76b6..f2d9584 100644
--- a/lib/libc/nls/msgcat.c
+++ b/lib/libc/nls/msgcat.c
@@ -47,7 +47,6 @@ __FBSDID("$FreeBSD$");
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
-#include <locale.h>
 #include <nl_types.h>
 #include <pthread.h>
 #include <stdio.h>
@@ -56,7 +55,7 @@ __FBSDID("$FreeBSD$");
 #include <unistd.h>
 #include "un-namespace.h"
 
-#include "../locale/setlocale.h"        /* for ENCODING_LEN */
+#include "../locale/xlocale_private.h"
 
 #define _DEFAULT_NLS_PATH "/usr/share/nls/%L/%N.cat:/usr/share/nls/%N/%L:/usr/local/share/nls/%L/%N.cat:/usr/local/share/nls/%N/%L"
 
@@ -115,9 +114,10 @@ catopen(const char *name, int type)
 {
 	struct stat sbuf;
 	struct catentry *np;
-	char *base, *cptr, *cptr1, *lang, *nlspath, *pathP, *pcode;
-	char *plang, *pter, *tmpptr;
+	char *base, *cptr, *cptr1, *nlspath, *pathP, *pcode;
+	char *plang, *pter;
 	int saverr, spcleft;
+	const char *lang, *tmpptr;
 	char path[PATH_MAX];
 
 	/* sanity checking */
@@ -129,7 +129,7 @@ catopen(const char *name, int type)
 		lang = NULL;
 	else {
 		if (type == NL_CAT_LOCALE)
-			lang = setlocale(LC_MESSAGES, NULL);
+			lang = querylocale(LC_MESSAGES_MASK, __get_locale());
 		else
 			lang = getenv("LANG");