# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1398386515 -7200
# Node ID dc3497041aca8e66619e4e304dd2f34246b1859d
# Parent  dfe88a0e18fdb2c5fd076ef0773b20b4f0d77601
util.pposix: Fix error reporting from really old Linux fallocate() that did not use errno for some reason (thanks pro)

diff -r dfe88a0e18fd -r dc3497041aca util-src/pposix.c
--- a/util-src/pposix.c	Fri Apr 25 00:36:01 2014 +0200
+++ b/util-src/pposix.c	Fri Apr 25 02:41:55 2014 +0200
@@ -674,11 +674,15 @@
 	len = luaL_checkinteger(L, 3);
 
 #if defined(__linux__) && defined(_GNU_SOURCE)
-	if(fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len) == 0)
+	errno = 0;
+	ret = fallocate(fileno(f), FALLOC_FL_KEEP_SIZE, offset, len);
+	if(ret == 0)
 	{
 		lua_pushboolean(L, 1);
 		return 1;
 	}
+	/* Some old versions of Linux apparently use the return value instead of errno */
+	if(errno == 0) errno = ret;
 
 	if(errno != ENOSYS && errno != EOPNOTSUPP)
 	{