Re: specifying the source of stdin (pipe / file)
Re: specifying the source of stdin (pipe / file)
- Subject: Re: specifying the source of stdin (pipe / file)
- From: Rick Sustek <email@hidden>
- Date: Fri, 2 May 2008 09:21:30 -0700
Not clear on what you are after.
Do you mean you want to launch your utility from within Xcode and
have Xcode feed a command line to it?
or
Do you mean that you want to launch your utility on a shell command
line, and redirect a file into the stdin of your program?
like:
% cat fooFile | myUtil
or
% myUtil < fooFile
-Rick
Begin forwarded message:
From: Adam Richard <email@hidden>
Date: May 2, 2008 6:17:54 AM PDT
To: email@hidden
Subject: specifying the source of stdin (pipe / file)
I am trying to write a command-line application with XCode.
My application takes input from stdin. The way I normally use it
is to use redirection to specify the input file. For example:
[CODE]program < input.txt[/CODE]
In XCode, this is presumably specified by creating an executable
and editing its info, via Project -> Edit Active Executable "...".
But the dialog doesn't explain how to specify where input comes
from. Changing the arguments to include "< input.txt" doesn't
work, I guess because "<" is a symbol known to the Terminal, and
XCode probably bypasses the Terminal. Changing the option to "Use
Pipe for standard input/output" seems to have no effect - perhaps
there's a way to specify a pipe, but the dialog won't let me.
Searching the XCode User's Guide didn't explain it either - it
mentions the "Use Pipe" option, but doesn't describe how it works.
How can I get standard input from a file?
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