How to execute a program and get the console's output?

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Running a command from Ruby displaying and capturing the output

I have to execute a program on my local server and get, in a variable, the console's output

What have you tried? Where's your code? What error messages have you received? — Todd A. Jacobs, Jun 15 '12 at 09:02
What outputs do you want to capture? Other programs' outputs? — waitingkuo, Jun 15 '12 at 09:05

score 2 · Accepted Answer · answered Jun 15 '12 at 09:11

2

output = `echo "hello"`
puts output # => hello

answered Jun 15 '12 at 09:11

Samy Dindane

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score 1 · Answer 2 · answered Jun 15 '12 at 09:07

1

$ irb
1.9.3p125 :001 > cal = %x[/usr/bin/cal]
1.9.3p125 :002 > puts cal
     June 2012        
Su Mo Tu We Th Fr Sa  
                1  2  
 3  4  5  6  7  8  9  
10 11 12 13 14 15 16  
17 18 19 20 21 22 23  
24 25 26 27 28 29 30

answered Jun 15 '12 at 09:07

Lars Haugseth

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score 0 · Answer 3 · answered Jun 15 '12 at 09:08

0

You can redirect output with IO reopen.

$stdout.reopen("stdout.txt", "w")
$stderr.reopen("stderr.txt", "w")

puts 'stdout redirect'
warn 'stderr redirect'

answered Jun 15 '12 at 09:08

YYZ

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How to execute a program and get the console's output?

3 Answers3