sched/signal: Add support for SIGPIPE. SIGPIPE uses SIG_SIGPIPE_ACTION which terminates process by default. It also could be ignored.

include/signal.h

@@ -92,7 +92,7 @@
  *   SIGILL     A       Illegal instruction
  *   SIGINT     T (3)   Terminal interrupt signal
  *   SIGKILL    T (3)   Kill (cannot be caught or ignored)
- *   SIGPIPE    T       Write on a pipe with no one to read it
+ *   SIGPIPE    T (7)   Write on a pipe with no one to read it
  *   SIGQUIT    A       Terminal quit signal
  *   SIGSEGV    A       Invalid memory reference
  *   SIGSTOP    S (2)   Stop executing (cannot be caught or ignored)
@@ -132,6 +132,7 @@
  * (4)  The default action can be enabled with CONFIG_SIG_SIGUSR1_ACTION
  * (5)  The default action can be enabled with CONFIG_SIG_SIGUSR2_ACTION
  * (6)  The default action can be enabled with CONFIG_SIG_SIGPOLL_ACTION
+ * (7)  The default action can be enabled with CONFIG_SIG_SIGPIPE_ACTION
  */
 
 /* A few of the real time signals are used within the OS.  They have
@@ -190,6 +191,12 @@
 #  define SIGINT      CONFIG_SIG_INT
 #endif
 
+#ifndef CONFIG_SIG_SIGPIPE
+#  define SIGPIPE       11
+#else
+#  define SIGPIPE       CONFIG_SIG_SIGPIPE
+#endif
+
 /* The following are non-standard signal definitions */
 
 #ifndef CONFIG_DISABLE_PTHREAD

sched/Kconfig

@@ -1414,6 +1414,12 @@ config SIG_SIGKILL_ACTION
 		Enable the default action for SIGINT and SIGKILL (terminate the
 		task).
 
+config SIG_SIGPIPE_ACTION
+	bool "SIGPIPE"
+	default y
+	---help---
+		Enable the default action for SIGPIPE (terminate the task).
+
 endif # SIG_DEFAULT
 
 menu "Signal Numbers"
@@ -1500,6 +1506,14 @@ config SIG_INT
 
 endif # SIG_DEFAULT
 
+config SIG_PIPE
+	int "SIGPIPE"
+	default 11
+	---help---
+		The SIGPIPE signal is sent to a task termination event.
+		This signal is generated when write on a pipe with no one to read it.
+		SIGPIPE may be ignored.
+
 comment "Non-standard Signal Numbers"
 
 config SIG_SIGCONDTIMEDOUT

sched/signal/sig_default.c

@@ -138,7 +138,10 @@ static const struct nxsig_defaction_s g_defactions[] =
 #endif
 #ifdef CONFIG_SIG_SIGKILL_ACTION
   { SIGINT,  0,                nxsig_abnormal_termination },
-  { SIGKILL, SIG_FLAG_NOCATCH, nxsig_abnormal_termination }
+  { SIGKILL, SIG_FLAG_NOCATCH, nxsig_abnormal_termination },
+#endif
+#ifdef CONFIG_SIG_SIGPIPE_ACTION
+  { SIGPIPE, 0,                nxsig_abnormal_termination }
 #endif
 };