2007-06-11 Jan Kratochvil <jan.kratochvil@redhat.com>

2007-06-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Never interrupt when the attached traced process would be left stopped.
	* strace.c (main): `-p' attaching moved to ...
	(startup_attach): ... a new function, renamed a variable C to TCBI.
	Block interrupting signals since the first tracee has been attached.
	New comment about INTERRUPTED in the nonthreaded case.
	[LINUX] (startup_attach): Check INTERRUPTED after each attached thread.
	(main): Command spawning moved to ...
	(startup_child): ... a new function, replaced RETURN with EXIT.
	[LINUX] (detach): New variable CATCH_SIGSTOP, do not signal
	new SIGSTOP for processes still in TCB_STARTUP.
	(main): Move signals and BLOCKED_SET init before the tracees attaching,
	[SUNOS4] (trace): Removed fixvfork () call as a dead code, SIGSTOP must
	have been already caught before clearing TCB_STARTUP.
	(trace): Removed the `!WIFSTOPPED(status)' dead code.
	Clear TCB_STARTUP only in the case the received signal was SIGSTOP.
	New comment when `TCB_BPTSET && TCB_STARTUP' combination can be set.
	Code advisory: Roland McGrath
	Fixes RH#240986.