On 2013-11-21 12:39, Marcin Zajączkowski wrote: > On 2013-11-21 04:59, David Adam wrote: >> On Thu, 21 Nov 2013, David Adam wrote: >>> On Wed, 20 Nov 2013, Marcin Zajączkowski wrote: >>>> How can I determine that my function has something to on read stdin (to >>>> not call "read" then which would open an interactive prompt)? >>> >>> This is a different question; the tty function does not check for the >>> presence or absence of data on stdin. I don't actually know of a clever >>> way of doing this from a shell script; in C I guess you'd do a select() >>> with a zero timeout or something. >> >> I've just been informed that (at least in bash) you can use `read -n 0 -t >> 0`, but this is not implemented in fish at this stage. > > Thanks for your reply! > > I made a workaround in my function and first check if there are any > params and later read from stdin which uses piped content or just the > user for a text. > > Nevertheless it would be useful to have a way to tell read to fail > immediately (and in my case display an error message to the user) when > there is nothing on stdin, e.g. by using a simple switch. I created an > issue: > https://github.com/fish-shell/fish-shell/issues/1134
Ehh, I missed a part of the content of your first message when you provide a way with "if not tty" to determine when to read from stdin. In that case (a simple hacky workaround) my feature request is much less needed. Marcin ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ Fish-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/fish-users
