ash: kill background processes on SIGINT

Consider this script:

   #!/bin/sh -e
   f() {
       for n in $(seq 1 10); do
           echo "Background $n ..."
           sleep 1
       done
   }
   f 1 &
   f 2 &
   f 3 &
   wait

If this was interrupted by Ctrl+C the background jobs continued to
run.  Avoid this by sending SIGINT to all children of the shell.

Saves 16 bytes.

(See GitHub PR #500)

1 files changed, 1 insertions, 0 deletions

diff --git a/shell/ash.c b/shell/ash.c
index efb80dfe4..99fbf6053 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -929,6 +929,7 @@ raise_interrupt(void)
                 raise(SIGINT);
 #else
                 fflush_all();
+                kill(-getpid(), SIGINT);
                 _exit(SIGINT << 24);
 #endif
         }