Get system command output

Execute a system command and get its output into the program. The output may be stored in any kind of collection (array, list, etc.).

For some languages this is a non-trivial task.

Example:

<lang ooRexx> /* Execute a system command and retrieve its output into a stem. */

 trace normal

/* Make the default values for the stem null strings. */

 text. =

/* Issue the system command. "address command" is optional.) */

 address command 'ls -l | rxqueue'

/* Remember the return code from the command. */

 ls_rc = rc

/* Remember the number of lines created by the command. */

 text.0 = queued()

/* Fetch each line into a stem variable. */

 do t = 1 to text.0
   parse pull text.t
 end

/* Output each line in reverse order. */

 do t = text.0 to 1 by -1
   say text.t
 end

/* Exit with the system command's return code. */ exit ls_rc </lang>

MainframeFossil (talk) 21:49, 10 April 2014 (UTC)