tree-wide: use -EBADF for fd initialization

-1 was used everywhere, but -EBADF or -EBADFD started being used in various
places. Let's make things consistent in the new style.

Note that there are two candidates:
EBADF 9 Bad file descriptor
EBADFD 77 File descriptor in bad state

Since we're initializating the fd, we're just assigning a value that means
"no fd yet", so it's just a bad file descriptor, and the first errno fits
better. If instead we had a valid file descriptor that became invalid because
of some operation or state change, the other errno would fit better.

In some places, initialization is dropped if unnecessary.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c
index 635763954b..0c062efc98 100644
--- a/src/resolve/resolved-dns-scope.c
+++ b/src/resolve/resolved-dns-scope.c
@@ -351,7 +351,7 @@ static int dns_scope_socket(
                 uint16_t port,
                 union sockaddr_union *ret_socket_address) {
 
-        _cleanup_close_ int fd = -1;
+        _cleanup_close_ int fd = -EBADF;
         union sockaddr_union sa;
         socklen_t salen;
         int r, ifindex;