From d36e1c87fe458a9b6ebb3c5897ef9de57c855394 Mon Sep 17 00:00:00 2001
From: ligd <liguiding@pinecone.net>
Date: Sun, 26 Aug 2018 07:48:38 -0600
Subject: [PATCH] apps/nshlib:  Add control-C support for terminating built-in
 and exec'ed file tasks.

---
 nshlib/nsh_builtin.c  | 10 ++++++++++
 nshlib/nsh_fileapps.c | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/nshlib/nsh_builtin.c b/nshlib/nsh_builtin.c
index 128757b2e..4d8736644 100644
--- a/nshlib/nsh_builtin.c
+++ b/nshlib/nsh_builtin.c
@@ -47,6 +47,7 @@
 #include <nuttx/config.h>
 
 #ifdef CONFIG_SCHED_WAITPID
+#  include <sys/ioctl.h>
 #  include <sys/wait.h>
 #endif
 
@@ -134,6 +135,13 @@ int nsh_builtin(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd,
         {
           int rc = 0;
 
+          /* Setup up to receive SIGKILL if control-C entered.  The return
+           * value is ignored because this console device may not support
+           * SIGKILL.
+           */
+
+          (void)ioctl(stdout->fs_fd, TIOCSCTTY, ret);
+
           /* Wait for the application to exit.  We did lock the scheduler
            * above, but that does not guarantee that the application did not
            * already run to completion in the case where I/O was redirected.
@@ -187,6 +195,8 @@ int nsh_builtin(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd,
               * the most recently executed task.
               */
             }
+
+          (void)ioctl(stdout->fs_fd, TIOCSCTTY, -1);
         }
 #  ifndef CONFIG_NSH_DISABLEBG
       else
diff --git a/nshlib/nsh_fileapps.c b/nshlib/nsh_fileapps.c
index ca6cccbc8..868a26df2 100644
--- a/nshlib/nsh_fileapps.c
+++ b/nshlib/nsh_fileapps.c
@@ -40,6 +40,7 @@
 #include <nuttx/config.h>
 
 #ifdef CONFIG_SCHED_WAITPID
+#  include <sys/ioctl.h>
 #  include <sys/wait.h>
 #endif
 
@@ -171,6 +172,13 @@ int nsh_fileapp(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd,
         {
           int rc = 0;
 
+          /* Setup up to receive SIGKILL if control-C entered.  The return
+           * value is ignored because this console device may not support
+           * SIGKILL.
+           */
+
+          (void)ioctl(stdout->fs_fd, TIOCSCTTY, pid);
+
           /* Wait for the application to exit.  We did lock the scheduler
            * above, but that does not guarantee that the application did not
            * already run to completion in the case where I/O was redirected.
@@ -219,6 +227,8 @@ int nsh_fileapp(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd,
               * the most recently executed task.
               */
             }
+
+          (void)ioctl(stdout->fs_fd, TIOCSCTTY, -1);
         }
 #  ifndef CONFIG_NSH_DISABLEBG
       else