ash: improve signal handling

Allow waitpid() to detect SIGTERM/SIGKILL by checking the (Windows)
status returned by GetExitCodeProcess() and updating the Unix
status to suit.  This allows ash to detect when a process has been
'signalled'.

Provide our own implementation of strsignal(3) which returns
expanded text for SIGTERM/SIGKILL.

Costs 192 bytes.

1 files changed, 9 insertions, 0 deletions

diff --git a/win32/mingw.c b/win32/mingw.c
index 40714296f..b8dd6a511 100644
--- a/win32/mingw.c
+++ b/win32/mingw.c
@@ -171,6 +171,15 @@ char *mingw_strerror(int errnum)
         return strerror(errnum);
 }
 
+char *strsignal(int sig)
+{
+        if (sig == SIGTERM)
+                return (char *)"Terminated";
+        else if (sig == SIGKILL)
+                return (char *)"Killed";
+        return (char *)get_signame(sig);
+}
+
 static int zero_fd = -1;
 static int rand_fd = -1;