Hi all, I am having trouble with a perl open pipe where it seems to exiting from the called script early for some users. I have a script that talks to an SQL database, but before it even tries to communicate with the SQL database I have it printing a message stating that the script has started running: 

# Subscript
PrintLog("My sub-script is running...","i");
PrintLog("Yes, just to confirm I am running...","i");
...etc...onto the SQL stuff

[download]

My main script then calls this as follows: 

  my $run_pid = open(RUN, "sub_script.pl $options 2>&1 |") or $sub_fai
+led = 1;
  
  if (!$sub_failed) {
    $text .= "Entered if (!\$sub_failed) {\n";
    while (<RUN>) { 
      $text .= "Entered while (<RUN>)\n";
      chomp;
      $_ =~ s/^\s*//;  
      $text .= "$_\n";
    }
    close(RUN);
    if ($? != 0) { $sub_failed = 1; } 
  }
  else { $text .= "Failed to open sub_script.pl\n";}

  print "$text";

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The problem I am seeing is that the print of text at the end can sometimes return any of the following: 
Entered if (!\$sub_failed) {

or

Entered if (!\sub_failed) {
Entered while (<RUN>)

or

Entered if (!\$sub_failed) {
Entered while (<RUN>)
My sub-script is running...

or

Entered if (!\$sub_failed) {
Entered while (<RUN>)
My sub-script is running...
Yes, just to confirm I am running.. 

and so on...

[download]

I am struggling to figure out what my be the cause of thinking the pipe is finished early. I have use piped opens in several places without issue so originally though that the issue was a due to a delay in connecting to the SQL server but the prints show that things can fall over even before I get to the SQL part of things.

Any advice/direction would be appreciated.

Thanks

Albob

In reply to Perl open pipe exiting early by albob

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