utils: add lxc_getpagesize()

src/lxc/utils.c

@@ -2420,3 +2420,14 @@ int lxc_make_tmpfile(char *template, bool rm)
 
 	return fd;
 }
+
+uint64_t lxc_getpagesize(void)
+{
+	int64_t pgsz;
+
+	pgsz = sysconf(_SC_PAGESIZE);
+	if (pgsz <= 0)
+		pgsz = 1 << 12;
+
+	return pgsz;
+}

src/lxc/utils.h

@@ -467,5 +467,6 @@ extern bool has_fs_type(const char *path, fs_type_magic magic_val);
 extern bool is_fs_type(const struct statfs *fs, fs_type_magic magic_val);
 extern bool lxc_nic_exists(char *nic);
 extern int lxc_make_tmpfile(char *template, bool rm);
+extern uint64_t lxc_getpagesize(void);
 
 #endif /* __LXC_UTILS_H */