loop: make uloop_run() return the cancelling signal

When a process quits in response to a signal it handles, it should to so
be re-sending the signal to itself. This especially important for SIGINT,
as is explained in [1].

uloop currently hides the reason for quitting uloop_run(). Fix this by
returning the signal that caused the loop to quit (or 0 when uloop_end()
was used), so a program using loop an comply with [1].

[1] https://www.cons.org/cracauer/sigint.html

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/uloop.h b/uloop.h
index 7564514..2f1eb4c 100644
--- a/uloop.h
+++ b/uloop.h
@@ -103,7 +103,7 @@ static inline void uloop_end(void)
 }
 
 int uloop_init(void);
-void uloop_run(void);
+int uloop_run(void);
 void uloop_done(void);
 
 #endif