Eric Blake <[EMAIL PROTECTED]> writes: > Perhaps we should add an accessor function that sets a static > variable in the closeout module, defaulting to 0, but that an > application can call to register any errno that it wants tracked (in > this case, after failing fflush, m4 would call the accessor to stash > the ENOSPC), so that when the atexit handler is finally called, the > stashed errno can be used if close_stream fails but without > explaining why.
That sounds really tricky. Much simpler is to say: if you care about the return value of a function, do the function before you call 'exit'. Once you're exiting, don't issue any diagnostics: at that point your only goal is to exit cleanly. This is the general strategy that coreutils uses.
