[PBCKP-216] review fixes

Author: Daniel Shelepanov

src/show.c

@@ -12,6 +12,7 @@
 
 #include <time.h>
 #include <dirent.h>
+#include <locale.h>
 #include <sys/stat.h>
 
 #include "utils/json.h"
@@ -1045,15 +1046,16 @@ show_archive_json(const char *instance_name, uint32 xlog_seg_size,
 		appendPQExpBuffer(buf, "%lu", tlinfo->size);
 
 		json_add_key(buf, "zratio", json_level);
-
 		// forcing comma-based floating point representation
-		char *save_locale = setlocale(LC_NUMERIC, NULL);
-		setlocale(LC_NUMERIC, "POSIX");
+		locale_t newloc = newlocale(LC_NUMERIC_MASK, "POSIX", (locale_t)0);
+		locale_t saveloc = uselocale(newloc);
 		if (tlinfo->size != 0)
 			zratio = ((float)xlog_seg_size*tlinfo->n_xlog_files) / tlinfo->size;
 		appendPQExpBuffer(buf, "%.2f", zratio);
 		// restoring previous locale
-		setlocale(LC_NUMERIC, save_locale);
+		if(saveloc != (locale_t)0)
+			uselocale(saveloc);
+		freelocale(newloc);
 
 		if (tlinfo->closest_backup != NULL)
 			snprintf(tmp_buf, lengthof(tmp_buf), "%s",