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Program Example37;
{ Program to demonstrate the Popen function. }
uses BaseUnix,Unix;
var f : text;
i : longint;
begin
writeln ('Creating a shell script to which echoes its arguments');
writeln ('and input back to stdout');
assign (f,'test21a');
rewrite (f);
writeln (f,'#!/bin/sh');
writeln (f,'echo this is the child speaking.... ');
writeln (f,'echo got arguments \*"$*"\*');
writeln (f,'cat');
writeln (f,'exit 2');
writeln (f);
close (f);
fpchmod ('test21a',&755);
popen (f,'./test21a arg1 arg2','W');
if fpgeterrno<>0 then
writeln ('error from POpen : errno : ', fpgeterrno);
for i:=1 to 10 do
writeln (f,'This is written to the pipe, and should appear on stdout.');
Flush(f);
Writeln ('The script exited with status : ',PClose (f));
writeln;
writeln ('Press <return> to remove shell script.');
readln;
assign (f,'test21a');
erase (f)
end.
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