From 7337853ae2b58fbccea28e795996f47fe151b0c9 Mon Sep 17 00:00:00 2001
From: Stéphane Raimbault <stephane.raimbault@gmail.com>
Date: Thu, 6 Jan 2011 08:25:49 +0100
Subject: [PATCH] Install an ignore handler for SIGPIPE on *BSD to mimic MSG_NOSIGNAL

---
 NEWS             |  2 ++
 src/modbus-tcp.c | 13 +++++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/NEWS b/NEWS
index b31a221..f9cd880 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,8 @@
 libmodbus 2.9.3 (2011-01-XX)
 ============================
 
+- Install an ignore handler for SIGPIPE on *BSD
+  Original patch by Jason Oster.
 - Fix closing of Win32 socket.
   Reported by Petr Parýzek.
 - Fix unit identifier not copied by the TCP server.
diff --git a/src/modbus-tcp.c b/src/modbus-tcp.c
index 50d3624..aa4e3c6 100644
--- a/src/modbus-tcp.c
+++ b/src/modbus-tcp.c
@@ -425,6 +425,19 @@ modbus_t* modbus_new_tcp(const char *ip, int port)
     modbus_t *ctx;
     modbus_tcp_t *ctx_tcp;
 
+#if defined(OS_BSD)
+    /* MSG_NOSIGNAL is unsupported on *BSD so we install an ignore
+       handler for SIGPIPE. */
+    struct sigaction sa;
+
+    sa.sa_handler = SIG_IGN;
+    if (sigaction(SIGPIPE, &sa, NULL) < 0) {
+        /* The debug flag can't be set here... */
+        fprintf(stderr, "Coud not install SIGPIPE handler.\n");
+        return -1;
+    }
+#endif
+
     ctx = (modbus_t *) malloc(sizeof(modbus_t));
     _modbus_init_common(ctx);
 
--
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