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.

2 files changed, 1 insertions, 1 deletions

diff --git a/include/mingw.h b/include/mingw.h
index d48ad3814..74a65116c 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -210,6 +210,7 @@ int unsetenv(const char *env);
  */
 char *strndup(char const *s, size_t n);
 char *mingw_strerror(int errnum);
+char *strsignal(int sig);
 
 #define strerror mingw_strerror
 
diff --git a/include/platform.h b/include/platform.h
index 37e48dcc5..7bb39fd93 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -473,7 +473,6 @@ typedef unsigned smalluint;
 # undef HAVE_STRCASESTR
 # undef HAVE_STRCHRNUL
 # undef HAVE_STRSEP
-# undef HAVE_STRSIGNAL
 # undef HAVE_STRVERSCMP
 #if !defined(__MINGW64_VERSION_MAJOR)
 # undef HAVE_VASPRINTF