Capture system command output

ruby-talk
1

Hi
my bellow command

#!/usr/bin/ruby

require 'rubygems'
`parted -s /dev/cciss/c0d12 primary 0 100%`
puts $?.to_i

its showing 0, but it should show 1

because check the command line from comand line

parted -s /dev/cciss/c0d12 mkpart primary 0 100%
Error: Can't have overlapping partitions.
# echo $?
1

then why from ruby is showing different ??
thanks

···

--
Posted via http://www.ruby-forum.com/.

2

#!/usr/bin/ruby

require 'rubygems'
`parted -s /dev/cciss/c0d12 primary 0 100%`
puts $?.to_i

$?'s class is Process::Status
You should use $?.exitstatus

···

On 2012-09-02 22:06, Fosiul Alam wrote:

its showing 0, but it should show 1

because check the command line from comand line

parted -s /dev/cciss/c0d12 mkpart primary 0 100%
Error: Can't have overlapping partitions.
# echo $?
1

then why from ruby is showing different ??
thanks

--
Wybo

3

$?'s class is Process::Status
You should use $?.exitstatus

hi i tried that

but no luck , dont know why ..
have a look

require 'rubygems'
`parted -s /dev/cciss/c0d12 primary 0 100%`
puts $?.exitstatus

parted -s /dev/cciss/c0d12 mkpart primary 0 100%
Error: Can't have overlapping partitions.
echo $?
1
[root@us-vp-55 ~]# ruby test.rb
0

···

--
Posted via http://www.ruby-forum.com/\.

4

It works here:

$ irb
irb(main):001:0> `parted -s /dev/cciss/c0d12 primary 0 100%`
=> "Error: Could not stat device /dev/cciss/c0d12 - No such file or
directory.\n"
irb(main):002:0> puts $?.exitstatus
1
=> nil
irb(main):003:0>

···

On 2012-09-02 23:09, Fosiul Alam wrote:

$?'s class is Process::Status
You should use $?.exitstatus

hi i tried that

but no luck , dont know why ..
have a look

require 'rubygems'
`parted -s /dev/cciss/c0d12 primary 0 100%`
puts $?.exitstatus

--
Wybo

5

Wybo Dekker wrote in post #1074357:

`parted -s /dev/cciss/c0d12 primary 0 100%`
puts $?.exitstatus

It works here:

$ irb
irb(main):001:0> `parted -s /dev/cciss/c0d12 primary 0 100%`
=> "Error: Could not stat device /dev/cciss/c0d12 - No such file or
directory.\n"
irb(main):002:0> puts $?.exitstatus
1
=> nil
irb(main):003:0>

in my case

(irb):1: syntax error
parted -s /dev/cciss/c0d12 mkpart primary 0 100%
                                                 ^
(irb):2: syntax error
puts $?.exitstatus
       ^
  from (irb):2
irb(main):003:0>

···

On 2012-09-02 23:09, Fosiul Alam wrote:

  from :0

--
Posted via http://www.ruby-forum.com/\.

6

Fosiul Alam wrote in post #1074358:

in my case

(irb):1: syntax error
parted -s /dev/cciss/c0d12 mkpart primary 0 100%
                                                 ^
(irb):2: syntax error
puts $?.exitstatus
       ^
  from (irb):2
  from :0
irb(main):003:0>

What is that? How about correcting your syntax errors?

~$ irb
1.9.3p194 :001 > `parted -s /dev/cciss/c0d12 primary 0 100%`
Errno::ENOENT: No such file or directory - parted -s /dev/cciss/c0d12
primary 0 100%
  from (irb):1:in ``'
  from (irb):1
  from /Users/7stud/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'
1.9.3p194 :002 > $?.exitstatus
=> 127
1.9.3p194 :003 >

···

--
Posted via http://www.ruby-forum.com/\.