launch_daemon: Add API to get information on jobs.

* Ie. a listing of all targets/jobs, as well as specific (basic) info
  on each.
* Also added a bit of optional debug output.
* Moved translating the path to launch time -- we should take the job's
  environment into account here at some point.

headers/private/app/LaunchDaemonDefs.h

@@ -32,6 +32,10 @@ enum {
 	B_UNREGISTER_LAUNCH_EVENT	= 'lnue',
 	B_NOTIFY_LAUNCH_EVENT		= 'lnne',
 	B_RESET_STICKY_LAUNCH_EVENT	= 'lnRe',
+	B_GET_LAUNCH_TARGETS		= 'lngt',
+	B_GET_LAUNCH_JOBS			= 'lngj',
+	B_GET_LAUNCH_TARGET_INFO	= 'lntI',
+	B_GET_LAUNCH_JOB_INFO		= 'lnjI',
 };
 
 

headers/private/app/LaunchRoster.h

@@ -45,6 +45,11 @@ public:
 			status_t			ResetStickyEvent(const BMessenger& source,
 									const char* name);
 
+			status_t			GetTargets(BStringList& targets);
+			status_t			GetTargetInfo(const char* name, BMessage& info);
+			status_t			GetJobs(const char* target, BStringList& jobs);
+			status_t			GetJobInfo(const char* name, BMessage& info);
+
 	class Private;
 
 private:
@@ -54,6 +59,8 @@ private:
 			status_t			_UpdateEvent(uint32 what,
 									const BMessenger& source, const char* name,
 									uint32 flags = 0);
+			status_t			_GetInfo(uint32 what, const char* name,
+									BMessage& info);
 
 private:
 			BMessenger			fMessenger;