I’m trying to capture output from using Perl’s system
function to execute and redirect a system command’s ouptut to a file, but for some reason I’m not getting the whole output.
I’m using the following method:
system("example.exe >output.txt");
What’s wrong with this code, or is there an alternative way of doing the same thing?
Any command that has a command window output (no matter how big or small) can be appended with > filename. txt and the output will be saved to the specified text file.
the shortcut is Ctrl + Shift + S ; it allows the output to be saved as a text file, or as HTML including colors!
Method 1: Use redirection to save command output to file in Linux. You can use redirection in Linux for this purpose. With redirection operator, instead of showing the output on the screen, it goes to the provided file. The > redirects the command output to a file replacing any existing content on the file.
To send a PowerShell command's output to the Out-File cmdlet, use the pipeline. Alternatively, you can store data in a variable and use the InputObject parameter to pass data to the Out-File cmdlet. Out-File saves data to a file but it does not produce any output objects to the pipeline.
Same as MVS's answer, but modern and safe.
use strict;
use warnings;
open (my $file, '>', 'output.txt') or die "Could not open file: $!";
my $output = `example.exe`;
die "$!" if $?;
print $file $output;
easier
use strict;
use warnings;
use autodie;
open (my $file, '>', 'output.txt');
print $file `example.exe`;
if you need both STDOUT and STDERR
use strict;
use warnings;
use autodie;
use Capture::Tiny 'capture_merged';
open (my $file, '>', 'output.txt');
print $file capture_merged { system('example.exe') };
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With