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From:   Gal Ben-Haim <gbenhaim@augury.com>
To:     linux-bluetooth@vger.kernel.org
Cc:     Gal Ben-Haim <gbenhaim@augury.com>
Subject: [PATCH BlueZ] core: Catch SIGPIPE
Date:   Sat, 17 Nov 2018 08:00:24 +0200
Message-Id: <20181117060024.10390-1-gbenhaim@augury.com>
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Sender: linux-bluetooth-owner@vger.kernel.org
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bluetoothd receives a SIGPIPE and terminates if writing to a pipe that
was acquired by AcquireNotify and there are no readers. it can be
reproduced by terminating the reader process without closing the reader
end of the pipe.

Catching SIGPIPE will cause the write call to return an EPIPE error
which will be logged as "io_send: Broken pipe".
---
 src/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main.c b/src/main.c
index 4716f5388..54cdb8d3f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -533,6 +533,8 @@ static gboolean signal_handler(GIOChannel *channel, GIOCondition cond,
 	case SIGUSR2:
 		__btd_toggle_debug();
 		break;
+	case SIGPIPE:
+		break;
 	}
 
 	return TRUE;
@@ -549,6 +551,7 @@ static guint setup_signalfd(void)
 	sigaddset(&mask, SIGINT);
 	sigaddset(&mask, SIGTERM);
 	sigaddset(&mask, SIGUSR2);
+	sigaddset(&mask, SIGPIPE);
 
 	if (sigprocmask(SIG_BLOCK, &mask, NULL) < 0) {
 		perror("Failed to set signal mask");
-- 
2.19.1