signal, exec, wait, pid: improvements, especially to exec

- fix popen [open "|pipeline ..."] to return meaningful status in close
  (but note that stderr is not captured)
- popen pipelines can now be used as the target of exec redirection
- overally improvements to exec on windows. Now crt file descriptors
  are used throughout
- add support for [pid], [wait] and popen on windows
- os.wait is now wait, and integrates with [exec ... &] to be able
  to wait for running background tasks
- [socket pipe] is now also [pipe] and is supported on windows
- [file tempfile] is supported on windows
- move duplicated code between jim-aio.c and jim-exec.c to jimiocompat.c
- Fix [exec] on windows to match unix semantics wrt sharing the parent stream
  unless redirected rather than using /dev/null
- On windows redirect to or from /dev/null is automatically converted to NUL:
- If signal support is disabled, implement a minimal Jim_SignalId() for exec and wait
- aio now supports getfd, to return the underlying file descriptor.
  This is used by exec to support redirection, and allows popen channels
  to support exec redirection.

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 28 insertions, 0 deletions

diff --git a/jim-nosignal.c b/jim-nosignal.c
new file mode 100644
index 0000000..bc39712
--- /dev/null
+++ b/jim-nosignal.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <signal.h>
+
+#include <jim-signal.h>
+#include <jim.h>
+
+/* Implement trivial Jim_SignalId() just good enough for JimMakeErrorCode() in [exec] */
+
+
+/* This works for mingw, but is not really portable */
+#ifndef SIGPIPE
+#define SIGPIPE 13
+#endif
+#ifndef SIGINT
+#define SIGINT 2
+#endif
+
+const char *Jim_SignalId(int sig)
+{
+	static char buf[10];
+	switch (sig) {
+		case SIGINT: return "SIGINT";
+		case SIGPIPE: return "SIGPIPE";
+
+	}
+	snprintf(buf, sizeof(buf), "%d", sig);
+	return buf;
+}