I am trying to automate an interactive DOS command line utility (something
like irb)
using ruby 1.7.3 (on Windows 2000).
I tried using IO#popen but could not make the inputs (puts) interlace with
outputs (gets).
I had to batch all the puts’s together before doing the gets.
Any suggestions ?
TIA,
– shanko
Ok, so may be I should explain this with some example code ( here irb is
choosen only for demonstration):
check = IO.popen("ruby c:/ruby/bin/irb.rb",'r+')
check.puts("s = 'abcd'")
check.puts("puts 'matched' if s=~/a|b|c|d/")
check.puts("puts $:")
check.puts("puts $\"")
check.close_write
check.readlines.each { |line| puts line.upcase unless line =~ 'nil' }
which on my machine (ruby 1.7.3 (2002-11-17) [i386-mswin32]) produces:
irb(main):001:0> s = 'abcd'
"abcd"
irb(main):002:0> puts 'matched' if s=~/a|b|c|d/
matched
irb(main):003:0> puts $:
C:/ruby/lib/ruby/site_ruby/1.7
C:/ruby/lib/ruby/site_ruby/1.7/i386-msvcrt
C:/ruby/lib/ruby/site_ruby
C:/ruby/lib/ruby/1.7
C:/ruby/lib/ruby/1.7/i386-mswin32
.
irb(main):004:0> puts $"
irb.rb
e2mmap.rb
irb/init.rb
irb/context.rb
irb/workspace.rb
irb/extend-command.rb
irb/ruby-lex.rb
irb/slex.rb
irb/ruby-token.rb
irb/input-method.rb
irb/locale.rb
tempfile.rb
delegate.rb
irb(main):005:0> exit
Notice that I have to club all the “check.puts” functions before the
“check.close_write” and then do readlines
Is there a way to check.puts each command and then immediately read the
lines of output ?
I think IO#popen3 might do this, but it is not available on Windows.
TIA,
– shanko
“Shashank Date” sdate@kc.rr.com wrote in message
news:e90M9.26673$_b.451371@twister.kc.rr.com…
I am trying to automate an interactive DOS command line utility (something
like irb)
using ruby 1.7.3 (on Windows 2000).I tried using IO#popen but could not make the inputs (puts) interlace with
outputs (gets).
I had to batch all the puts’s together before doing the gets.Any suggestions ?
TIA,
– shanko
Hi,
Is there a way to check.puts each command and then immediately read the
lines of output ?
Try to send “STDOUT.sync = true” line first. This is because
the child process buffers stdout. In many UNIX, using pseudo
TTY tells processes to not buffer output, but Windows has no
this feature or similar.
I remember I wrote about this, regarding cygwin and DOS prompt
issue.
I think IO#popen3 might do this, but it is not available on Windows.
Correct, but impossible as OS doesn’t support it.
At Thu, 19 Dec 2002 13:14:07 +0900, Shashank Date wrote:
–
Nobu Nakada
Per nobu’s suggestion, this is what I did:
check = IO.popen("ruby c:/ruby/bin/irb.rb",'w+')
check.puts("STDOUT.sync = true")
check.puts("puts $:")
check.readlines.each { |line| puts line unless line =~ 'nil' }
check.close_write
check.readlines.each { |line| puts line unless line =~ 'nil' }
But the program seemed to hang.
So I killed it (using CTRL+Break in TextPad) and I got this:
Interrupted!
and after a couple of minutes …
C:/ruby/lib/ruby/1.7/irb.rb:234:in `write': Invalid argument
(Errno::EINVAL)
from C:/ruby/lib/ruby/1.7/irb.rb:234:in print' from C:/ruby/lib/ruby/1.7/irb.rb:234:in signal_handle’
from C:/ruby/lib/ruby/1.7/irb.rb:66:in start' from C:/ruby/lib/ruby/1.7/irb.rb:65:in call’
from C:/ruby/lib/ruby/1.7/irb/input-method.rb:49:in gets' from C:/ruby/lib/ruby/1.7/irb/input-method.rb:49:in gets’
from C:/ruby/lib/ruby/1.7/irb.rb:130:in eval_input' from C:/ruby/lib/ruby/1.7/irb.rb:129:in signal_status’
… 14 levels…
from C:/ruby/lib/ruby/1.7/irb.rb:70:in start' from C:/ruby/lib/ruby/1.7/irb.rb:69:in catch’
from C:/ruby/lib/ruby/1.7/irb.rb:69:in `start’
from c:/ruby/bin/irb.rb:13
Tool completed with exit code 4
Please help.
Thanks very much !
– shanko
nobu.nokada@softhome.net wrote in message
news:200212190443.gBJ4hLb24230@sharui.nakada.kanuma.tochigi.jp…
Hi,
At Thu, 19 Dec 2002 13:14:07 +0900, > Shashank Date wrote:
Is there a way to check.puts each command and then immediately read the
lines of output ?Try to send “STDOUT.sync = true” line first. This is because
the child process buffers stdout. In many UNIX, using pseudo
TTY tells processes to not buffer output, but Windows has no
this feature or similar.I remember I wrote about this, regarding cygwin and DOS prompt
issue.I think IO#popen3 might do this, but it is not available on Windows.
Correct, but impossible as OS doesn’t support it.
–
Nobu Nakada
Hello Shashank,
Thursday, December 19, 2002, 8:14:31 AM, you wrote:
Per nobu’s suggestion, this is what I did:
check = IO.popen("ruby c:/ruby/bin/irb.rb",'w+') check.puts("STDOUT.sync = true")
But the program seemed to hang.
you must exec “sync” at both sides 
add after first line
check.sync = true
i use this techinque to work with perl.exe and it really works
–
Best regards,
Bulat mailto:bulatz@integ.ru
Hello Bulat,
“Bulat Ziganshin” bulatz@integ.ru wrote in message
you must exec “sync” at both sides
check.sync = true
i use this techinque to work with perl.exe and it really works
Ok, so now I have:
check = IO.popen("ruby c:/ruby/bin/irb.rb",'w+')
check.sync = true
check.puts("STDOUT.sync = true")
check.puts("puts $:")
check.readlines.each { |line| puts line unless line =~ 'nil' }
check.close_write
check.readlines.each { |line| puts line unless line =~ 'nil' }
and it still does not work :-((
Can I see your code which drives perl.exe ?
May be it has something to do with the target application (in your case
“perl.exe” in my case “osql.exe”)
I am using “irb” only as an example.
Thanks,
– shanko