CODEWITHSUNDEEP
perl
Vishal Khemani
Vishal Khemani

Reputation: 171

Perl script is not waiting for a .bat file to complete and continuing execution

I am calling a bat file from a perl script.
Since the bat file takes long time for execution, the perl script is not waiting for the bat file to complete and continuing execution from the next line.

Is there a way by which we can suspend the execution of the perl script until the bat file is finished execution and then resume once the bat file is done.

I wrote something like this:

system ("start $bat_file");
print ("Hello");

So it prints hello even before bat file is finished.

Actually what I want to accomplish is:

  1. My bat file creates some file
  2. I want to copy those files to another location once the bat file is done.

But as it is not waiting for the bat file to complete, the copy fails because it tries to copy a folder which does not exist as the bat file is still being processed and has not produced the output file.

Note : Time to complete bat file is not fixed and changes everytime.

Upvotes: 1

Views: 748

Answers (2)

Borodin
Borodin

Reputation: 126732

You need to remove the start command

Without the /wait option, start will create a process and return immediately

But there is no need for start at all. You can write just

system($bat_file);

to achieve the effect that you're asking for

Upvotes: 9

Laser
Laser

Reputation: 6960

The problem that you have is the problem with start command and not with system

When you are using start command on windows it will start your program but will not wait for ending.

You have to use /wait after start
In your code it will be : 

system ("start /wait $bat_file"); 
print ("Hello");`

Start Manual

Upvotes: 2

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