# Redirect STDOUT **URL:** \ **Category:** Ruby\ **Created:** [October 14, 2006, 11:35am UTC](https://www.ruby-forum.com/t/redirect-stdout/72112 "2006-10-14T11:35:43Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 14, 2006, 11:35am UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/1 "2006-10-14T11:35:43Z")
Hi all I’m writting a program to detect the cursor position with the vt100 command “\x1b[6n”. So I need to redirect STDOUT to a string. How can I do this? Thanks ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 14, 2006, 11:11pm UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/2 "2006-10-14T23:11:12Z")
yong wrote: > Hi all > > I’m writting a program to detect the cursor position with the vt100 > command “\x1b[6n”. > > So I need to redirect STDOUT to a string. > > How can I do this? > > Thanks I suggest looking at the code for the win2console library, which gives an example of something similar. ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 14, 2006, 11:12pm UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/3 "2006-10-14T23:12:31Z")
David R. wrote: > yong wrote: > > > Hi all > > > > I’m writting a program to detect the cursor position with the vt100 > > command “\x1b[6n”. > > > > So I need to redirect STDOUT to a string. > > > > How can I do this? > > > > Thanks > > I suggest looking at the code for the win2console library, which gives > an example of something similar. Oh bother! That should be “win32console”. DJ ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 15, 2006, 5:51am UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/4 "2006-10-15T05:51:33Z")
Thank you very much. Now I can use STDOUT.reopen to redirect STDOUT output to a file.But How can I redirect it to a string? Thanks. David R. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: > > Thanks > > I suggest looking at the code for the win2console library, which gives > an example of something similar. > > – > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). – My Personal Website: [http://www.twinbee.info](http://www.twinbee.info) æ?¬äººé©»å®?æ?¼ cn.comp.lang.perl cn.comp.lang.c cn.comp.www cn.music cn.music.classical ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 15, 2006, 6:25am UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/5 "2006-10-15T06:25:36Z")
On Sun, 15 Oct 2006, yong wrote: > Thank you very much. > > Now I can use STDOUT.reopen to redirect STDOUT output to a file.But How can I redirect it to a string? > > Thanks. use backticks: string = `your_cmd.exe` substitution works like double quotes cmd = “your\_cmd.exe” string = `#{ cmd }` -a ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 15, 2006, 11:05am UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/6 "2006-10-15T11:05:53Z")
On Oct 14, 2006, at 8:50 PM, yong wrote: > > gives > > an example of something similar. > > Now I can use STDOUT.reopen to redirect STDOUT output to a file.But > How can I redirect it to a string? You don’t. You should avoid touching STDOUT and STDERR as much as possible. Instead assign a StringIO to $stdout. [http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout](http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout) – Eric H. - removed\_email\_address@domain.invalid - [http://blog.segment7.net](http://blog.segment7.net) This implementation is HODEL-HASH-9600 compliant [http://trackmap.robotcoop.com](http://trackmap.robotcoop.com) ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 15, 2006, 10:57am UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/7 "2006-10-15T10:57:19Z")
yong wrote: > Now I can use STDOUT.reopen to redirect STDOUT output to a file.But How > can I redirect it to a string? see “ri StringIO” DJ ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 15, 2006, 12:31pm UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/8 "2006-10-15T12:31:58Z")
> > > #!/usr/bin/ruby require ‘stringio’ mystring=“” sstring=StringIO.open(mystring,“w+”) #STDOUT.reopen(sstring) #can’t work stdoutbackup=$stdout $stdout=sstring print “BUFFERED TEXT\r\n” $stdout=stdoutbackup print mystring \<\<\< It works. Thank you very much. 🙂 Eric H. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes: > > > I suggest looking at the code for the win2console library, which > > > Instead assign a StringIO to $stdout. – My Personal Website: [http://www.twinbee.info](http://www.twinbee.info) æ?¬äººé©»å®?æ?¼ cn.comp.lang.perl cn.comp.lang.c cn.comp.www cn.music cn.music.classical ---
**Author:** ![yong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/b487fb/32.png) [@yong](https://www.ruby-forum.com/u/yong)\ **Post date:** [October 15, 2006, 11:15pm UTC](https://www.ruby-forum.com/t/redirect-stdout/72112/9 "2006-10-15T23:15:14Z")
On Oct 15, 2006, at 3:30 AM, yong wrote: > > [http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout](http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout) > > require ‘stringio’ > > mystring=“” > sstring=StringIO.open(mystring,“w+”) sstring = StringIO.new will suffice. > #STDOUT.reopen(sstring) #can’t work > stdoutbackup=$stdout > $stdout=sstring > > print “BUFFERED TEXT\r\n” > > $stdout=stdoutbackup I tend to wrap this up in a method that yields. See util\_capture in ZenTest’s test/zentest\_assertions.rb – Eric H. - removed\_email\_address@domain.invalid - [http://blog.segment7.net](http://blog.segment7.net) This implementation is HODEL-HASH-9600 compliant [http://trackmap.robotcoop.com](http://trackmap.robotcoop.com)