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, 26 insertions, 0 deletions

diff --git a/tests/exec2.test b/tests/exec2.test
index e43bba0..91108da 100644
--- a/tests/exec2.test
+++ b/tests/exec2.test
@@ -44,4 +44,30 @@ test exec2-2.4 "Remove all env var" {
 
 array set env [array get saveenv]
 
+test exec2-3.1 "close pipeline return value" {
+	set f [open |false]
+	set rc [catch {close $f} msg opts]
+	lassign [dict get $opts -errorcode] status pid exitcode
+	list $rc $msg $status $exitcode
+} {1 {child process exited abnormally} CHILDSTATUS 1}
+
+test exec2-3.2 "close pipeline return value" -body {
+	set f [open "|echo abc | grep def | wc" ]
+	set rc [catch {close $f} msg opts]
+	lassign [dict get $opts -errorcode] status pid exitcode
+	list $rc $msg $status $exitcode
+} -match glob -result {1 {child killed*} CHILDKILLED SIGPIPE}
+
+
+test exec2-3.4 "wait for background task" {
+	set pid [exec sleep 0.1 &]
+	lassign [wait $pid] status newpid exitcode
+	if {$pid != $newpid} {
+		error "Got wrong pid from wait"
+	} else {
+		list $status $exitcode
+	}
+} {CHILDSTATUS 0}
+
+
 testreport