IO with external program

[Danny Beaudoin]

Hi!
I would like to run a program from ruby and be able to give it its input and
receive the output. This program usually uses stdin and stdout. How may I
achieve this?
Thanks!

 

[nobu.nokada]

Hi,

At Sun, 29 May 2005 06:14:04 +0900,
Danny Beaudoin wrote in [ruby-talk:143900]:

I would like to run a program from ruby and be able to give it its input and
receive the output. This program usually uses stdin and stdout. How may I
achieve this?

cmd = IO.popen("program arg1 arg2", "r+")
cmd.puts(data)
cmd.close_write
result = cmd.read

close_write might be unnecessary depending on the program, if it
doesn't wait EOF of stdin.