From: Kim Alvefur <zash@zash.se>
Date: Fri, 25 Apr 2014 00:41:55 +0000 (+0200)
Subject: util.pposix: Fix error reporting from really old Linux fallocate() that did not use... 
X-Git-Url: https://git.enpas.org/?a=commitdiff_plain;ds=sidebyside;h=ff7dd1a3168a5ebfc1560d5886171df3c82d4225;p=prosody.git

util.pposix: Fix error reporting from really old Linux fallocate() that did not use errno for some reason (thanks pro)
---

diff --git a/util-src/pposix.c b/util-src/pposix.c
index a8654995..df814c28 100644
--- a/util-src/pposix.c
+++ b/util-src/pposix.c
@@ -674,11 +674,15 @@ int lc_fallocate(lua_State* L)
 	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)
 	{