Make errnum-verification more flexible (#824)

Instead of hardcoding the value to check against, use a more dynamic method to verify the error number before passing it to the kernel.

diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index 4b9ee89e3336a2eb3e678254ab8fc120848e98e6..fdef193bd1e4d5a53695484b3fdb4ef1b997e36e 100644 (file)
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -213,7 +213,12 @@ int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
 {
        struct fuse_out_header out;
 
+#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 32
+       const char *str = strerrordesc_np(error * -1);
+       if ((str == NULL && error != 0) || error > 0) {
+#else
        if (error <= -1000 || error > 0) {
+#endif
                fuse_log(FUSE_LOG_ERR, "fuse: bad error value: %i\n",   error);
                error = -ERANGE;
        }