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If we do, we won't flush, and we might not output everything.
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More's sigatexit handler needs to distinguish between normal exit and exit
due to receipt of a signal.
Change tty_sigreset to look at the signal number too, so that pressing 'q'
to exit top doesn't cause its exit status to be 128.
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And add a test.
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Previously we'd go into an infinite loop because we weren't
incrementing optargs.
Also add a missing flush so an error on stderr won't overtake the
escape code that resets reverse video.
Disclaimer: the new behavior isn't exactly like the desktop version;
surprisingly they try to open the next file _before_ they prompt. That
feels weird to me as a user, and seems like it would lead to a more
awkward implementation, but if you're more concerned about
authenticity...
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> Yes, I know, "don't use pending". Sadly, more(1) is pretty useless
> without this. It gets confused by long lines or tabs.
>
> This patch also adds the missing prompt between multiple files.
actually, it looks like we're already hard-coding some escape
sequences? more(1) doesn't need anything that isn't in ANSI, so here's
an alternative patch that fixes the same bugs as the other patch but
also has a reverse-video prompt:
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consistent).
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