Werner LEMBERG <[EMAIL PROTECTED]>, 2008-02-20 18:53 +0100: > > > > .if n \" for nroff processing input > > > > > > > .if t \" for troff/groff processing input > > > > I read the groff info node about conditionals, but just didn't know > > how to specify a condition that would only affect console output. > > Hmm. groff.texinfo has an index entry for `nroff mode' which points > to section named `Troff and Nroff Mode', and which explains the > differences. Anyway, I'll add links.
OK, I did now read the following in the that node: "Originally, `nroff' and `troff' were two separate programs, the former for TTY output, the latter for everything else. [...] it is sometimes necessary to make a distinction between TTY and non-TTY devices: `gtroff' provides two built-in conditions `n' and `t' for the `if', `ie', and `while' requests to decide whether `gtroff' shall behave like `nroff' or like `troff'." So that makes it very clear. The problem is that I didn't know enough about the distinction to know what to search for in the index. I wouldn't have thought to search for "nroff mode", because before Clarke pointed out the nroff/troff distinction, I didn't know about it (yeah, I know this reveals I have some basic ignorance about groff fundamentals). What I had been searching for in the index was "TTY". So maybe what would help would be an index entry like "TTY, conditional output for" (or something). --Mike -- Michael(tm) Smith http://people.w3.org/mike/ http://sideshowbarker.net/
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