util.pposix: Fix error reporting from really old Linux fallocate() that did not use...

diff --git a/util-src/pposix.c b/util-src/pposix.c
index a8654995a5daa147049ac782b49776e6167afaa4..df814c2899fc98d90ccfed116cd1ada3cd3a2d1d 100644 (file)
--- 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)
        {