- if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) != 0)
-#elif _XOPEN_SOURCE >= 600 || _POSIX_C_SOURCE >= 200112L
-#warning Using posix_fallocate() fallback. Linux fallocate() is strongly recommended if available: recompile with -D_GNU_SOURCE
- if(posix_fallocate(fileno(f), offset, len) != 0)
+ if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) == 0)
+ {
+ lua_pushboolean(L, 1);
+ return 1;
+ }
+
+ if(errno != ENOSYS && errno != EOPNOTSUPP)
+ {
+ lua_pushnil(L);
+ lua_pushstring(L, strerror(errno));
+ return 2;
+ }
+#else
+#warning Only using posix_fallocate() fallback.
+#warning Linux fallocate() is strongly recommended if available: recompile with -D_GNU_SOURCE
+#warning Note that posix_fallocate() will still be used on filesystems that dont support fallocate()