wait(2) and SIGCHLD

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

I'm confused regarding the behaviour of wait(2) wrt. SIGCHLD handling.

The wait(2) manpage says:

	wait() will fail and return immediately if:
	[ECHILD]	The calling process has no existing unwaited-for child
			processes; or no status from the terminated child
			process is available because the calling process has
			asked the system to discard such status by ignoring
			the signal SIGCHLD or setting the flag SA_NOCLDWAIT
			for that signal.

However, ignore is the default handler for SIGCHLD.

So does the
	because the calling process has asked the system
	to discard such status by ignoring the signal SIGCHLD
mean that explicitly ignoring SIGCHLD is different from ignoring it per default?