coccinelle: make use of SYNTHETIC_ERRNO

Ideally, coccinelle would strip unnecessary braces too. But I do not see any
option in coccinelle for this, so instead, I edited the patch text using
search&replace to remove the braces. Unfortunately this is not fully automatic,
in particular it didn't deal well with if-else-if-else blocks and ifdefs, so
there is an increased likelikehood be some bugs in such spots.

I also removed part of the patch that coccinelle generated for udev, where we
returns -1 for failure. This should be fixed independently.

1 files changed, 6 insertions, 4 deletions

diff --git a/src/resolve/resolved-dnstls-gnutls.c b/src/resolve/resolved-dnstls-gnutls.c
index 15055284d5..ddf9758bb3 100644
--- a/src/resolve/resolved-dnstls-gnutls.c
+++ b/src/resolve/resolved-dnstls-gnutls.c
@@ -155,8 +155,9 @@ ssize_t dnstls_stream_write(DnsStream *stream, const char *buf, size_t count) {
                 case GNUTLS_E_AGAIN:
                         return -EAGAIN;
                 default:
-                        log_debug("Failed to invoke gnutls_record_send: %s", gnutls_strerror(ss));
-                        return -EPIPE;
+                        return log_debug_errno(SYNTHETIC_ERRNO(EPIPE),
+                                               "Failed to invoke gnutls_record_send: %s",
+                                               gnutls_strerror(ss));
                 }
 
         return ss;
@@ -178,8 +179,9 @@ ssize_t dnstls_stream_read(DnsStream *stream, void *buf, size_t count) {
                 case GNUTLS_E_AGAIN:
                         return -EAGAIN;
                 default:
-                        log_debug("Failed to invoke gnutls_record_recv: %s", gnutls_strerror(ss));
-                        return -EPIPE;
+                        return log_debug_errno(SYNTHETIC_ERRNO(EPIPE),
+                                               "Failed to invoke gnutls_record_recv: %s",
+                                               gnutls_strerror(ss));
                 }
 
         return ss;