locales: use higher prio LC_ALL variable

For reseting locale environment into significantly less memory
consuming version 'C' - use LC_ALL instead of LANG since it has
higher priority in locale settings.

Otherwise we may observe whole locale-archive which might be
over 100MB on i.e. Fedora systems locked in memory with
some daemons.

WHATS_NEW

@@ -1,5 +1,6 @@
 Version 2.02.99 - 
 ===================================
+  Set locales with LC_ALL instead of lower priority LANG variable.
   Fix a crash-inducing race condition in lvmetad.
   Add log/debug_classes to lvm.conf to control debug log messages.
   Synchronize with udev in pvscan --cache and fix dangling udev_sync cookies.

daemons/clvmd/clvmd.c

@@ -440,8 +440,8 @@ int main(int argc, char *argv[])
 	 * used by some glibc (on some distributions it takes over 100MB).
 	 * Daemon currently needs to use mlockall().
 	 */
-	if (setenv("LANG", "C", 1))
+	if (setenv("LC_ALL", "C", 1))
-		perror("Cannot set LANG to C");
+		perror("Cannot set LC_ALL to C");
 
 	/* Setting debug options on an existing clvmd */
 	if (debug_opt && !check_local_clvmd()) {

daemons/dmeventd/dmeventd.c

@@ -1965,8 +1965,8 @@ int main(int argc, char *argv[])
 	 * used by some glibc (on some distributions it takes over 100MB).
 	 * Daemon currently needs to use mlockall().
 	 */
-	if (setenv("LANG", "C", 1))
+	if (setenv("LC_ALL", "C", 1))
-		perror("Cannot set LANG to C");
+		perror("Cannot set LC_ALL to C");
 
 	if (_restart)
 		restart();

libdaemon/server/daemon-server.c

@@ -456,8 +456,8 @@ void daemon_start(daemon_state s)
 	 * some glibc (on some distributions it takes over 100MB). Some daemons
 	 * need to use mlockall().
 	 */
-	if (setenv("LANG", "C", 1))
+	if (setenv("LC_ALL", "C", 1))
-		perror("Cannot set LANG to C");
+		perror("Cannot set LC_ALL to C");
 
 #ifdef linux
 	_systemd_activation = _systemd_handover(&s);

scripts/fsadm.sh

@@ -213,8 +213,8 @@ detect_mounted()  {
 
 	# for systems with different device names - check also mount output
 	if test -z "$MOUNTED" ; then
-		MOUNTED=$(LANG=C "$MOUNT" | "$GREP" "^$VOLUME[ \t]")
+		MOUNTED=$(LC_ALL=C "$MOUNT" | "$GREP" "^$VOLUME[ \t]")
-		test -z "$MOUNTED" && MOUNTED=$(LANG=C "$MOUNT" | "$GREP" "^$RVOLUME[ \t]")
+		test -z "$MOUNTED" && MOUNTED=$(LC_ALL=C "$MOUNT" | "$GREP" "^$RVOLUME[ \t]")
 		MOUNTED=${MOUNTED##* on }
 		MOUNTED=${MOUNTED% type *} # allow type in the mount name
 	fi
@@ -283,7 +283,7 @@ validate_parsing() {
 ####################################
 resize_ext() {
 	verbose "Parsing $TUNE_EXT -l \"$VOLUME\""
-	for i in $(LANG=C "$TUNE_EXT" -l "$VOLUME"); do
+	for i in $(LC_ALL=C "$TUNE_EXT" -l "$VOLUME"); do
 		case "$i" in
 		  "Block size"*) BLOCKSIZE=${i##*  } ;;
 		  "Block count"*) BLOCKCOUNT=${i##*  } ;;
@@ -318,7 +318,7 @@ resize_reiser() {
 	detect_mounted && verbose "ReiserFS resizes only unmounted filesystem" && try_umount
 	REMOUNT=$MOUNTED
 	verbose "Parsing $TUNE_REISER \"$VOLUME\""
-	for i in $(LANG=C "$TUNE_REISER" "$VOLUME"); do
+	for i in $(LC_ALL=C "$TUNE_REISER" "$VOLUME"); do
 		case "$i" in
 		  "Blocksize"*) BLOCKSIZE=${i##*: } ;;
 		  "Count of blocks"*) BLOCKCOUNT=${i##*: } ;;
@@ -347,7 +347,7 @@ resize_xfs() {
 		temp_mount || error "Cannot mount Xfs filesystem"
 	fi
 	verbose "Parsing $TUNE_XFS \"$MOUNTPOINT\""
-	for i in $(LANG=C "$TUNE_XFS" "$MOUNTPOINT"); do
+	for i in $(LC_ALL=C "$TUNE_XFS" "$MOUNTPOINT"); do
 		case "$i" in
 		  "data"*) BLOCKSIZE=${i##*bsize=} ; BLOCKCOUNT=${i##*blocks=} ;;
 		esac
@@ -389,7 +389,7 @@ resize() {
 
 ####################################
 # Calclulate diff between two dates
-#  LANG=C input is expected the
+#  LC_ALL=C input is expected the
 #  only one supported
 ####################################
 diff_dates() {
@@ -410,7 +410,7 @@ check() {
 	  "ext2"|"ext3"|"ext4")
 		IFS_CHECK=$IFS
 		IFS=$NL
-		for i in $(LANG=C "$TUNE_EXT" -l "$VOLUME"); do
+		for i in $(LC_ALL=C "$TUNE_EXT" -l "$VOLUME"); do
 			case "$i" in
 			  "Last mount"*) LASTMOUNT=${i##*: } ;;
 			  "Last checked"*) LASTCHECKED=${i##*: } ;;