ash: fix signal handling

Commit 89aa9d783 (win32: changes to signal handling) caused a
regression:  'httpd -f' could no longer be interrupted by Ctrl-C.

The specific issue is the use of exit(2) to replace raise(3) in
raise_interrupt().  This change was made so the shell would return
the expected exit code of 130 rather than the default code of 3
which Windows uses when a signal with SIG_DFL disposition is caught.

The problem can be avoided by calling _exit(2) instead.  A call to
fflush_all() has also been added, as _exit(2) doesn't do that.

(GitHub issue #365)

1 files changed, 2 insertions, 1 deletions

diff --git a/shell/ash.c b/shell/ash.c
index a19a3c686..dcc73031f 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -955,7 +955,8 @@ raise_interrupt(void)
                 signal(SIGINT, SIG_DFL);
                 raise(SIGINT);
 #else
-                exit(SIGINT << 24);
+                fflush_all();
+                _exit(SIGINT << 24);
 #endif
         }
 #if ENABLE_PLATFORM_MINGW32