Using less in environment without controlling tty

Cathey, Jim jcathey at
Tue Jul 30 17:12:01 UTC 2013

My understanding (sans looking at any particular code) is that
more/less/et al. read from stdin, write to stdout, and, if necessary,
read _commands_ from /dev/tty.  This allows them to work in a
pipeline as well as interactively.  The /dev/tty access is supposed to
be a last-ditch effort to find a channel to get interactive input from,
like password setting and the like.  So why not use isatty(stdout)
to determine whether or not to open /dev/tty?  That lets things

... | less | tee outfile


-- Jim

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