errno is positive

Make sure we compare errno against positive error codes.
The ones in hwclock.c and install.c can have an impact, the
rest are unlikely to be hit or in code that isn't widely
used.

Also check that errno > 0, to help gcc know that we are
returning a negative error code.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/readahead/sd-readahead.c b/src/readahead/sd-readahead.c
index 4a096eed42..675d82cdd1 100644
--- a/src/readahead/sd-readahead.c
+++ b/src/readahead/sd-readahead.c
@@ -65,7 +65,7 @@ static int touch(const char *path) {
                 if (close(fd) >= 0)
                         break;
 
-                if (errno != -EINTR)
+                if (errno != EINTR)
                         return -errno;
         }