From: Egor <egor@patchysicp.xyz>
Date: Sat, 21 Oct 2023 11:23:56 +0000 (+0300)
Subject: use SA_RESTART for SIGINT
X-Git-Url: https://git.patchysicp.xyz/?a=commitdiff_plain;h=918805c027e39fe9c2ee1c9f637740a77395112e;p=patchyircd.git

use SA_RESTART for SIGINT

SA_RESTART specifically doesn't affect polling syscalls (the thing we
want to interrupt), but it prevents stupid things like having to check
for EINTR on recv/send (which we weren't doing anyway)
---

diff --git a/src/main.c b/src/main.c
index 16d96a8..739a6f0 100644
--- a/src/main.c
+++ b/src/main.c
@@ -18,7 +18,8 @@ static void set_handler()
 	struct sigaction sa;
 	sa.sa_handler = on_sigint;
 	sigemptyset(&sa.sa_mask);
-	sa.sa_flags = SA_RESETHAND; // only run it once
+	/* Note that SA_RESTART doesn't affect select/poll/epoll_wait. */
+	sa.sa_flags = SA_RESETHAND | SA_RESTART;
 	if (sigaction(SIGINT, &sa, NULL) == -1)
 		perror("sigaction");
 	sa.sa_handler = SIG_IGN;