02 mail.pl

A Perl script!

mail.pl is a Perl script that appears to be a simple email client. Here's a breakdown of what the script does:

Line 1: #!/usr/bin/perl

This line specifies the interpreter that should be used to run the script. In this case, it's Perl.

Line 2-3: use strict; use warnings;

These lines enable strict syntax checking and warnings for the Perl script. This is a good practice to ensure that the script is written correctly and to catch any potential errors.

Line 4-5: my $to = $ARGV[0]; my $subject = $ARGV[1];

These lines define two variables: $to and $subject. They are set to the first and second command-line arguments, respectively. This suggests that the script expects two command-line arguments: the recipient's email address and the subject line.

Line 6-7: my $body = join("\n", @ARGV[2..$#ARGV]);

This line defines a variable $body that concatenates all the command-line arguments starting from the third one (index 2) to the last one. The join function is used to concatenate the arguments with newline characters (\n) in between.

Line 8-9: my $mail = "mail -s \"$subject\" $to";

This line defines a variable $mail that sets the command to send an email using the mail command. The subject line and recipient's email address are inserted into the command using double quotes.

Line 10: system($mail, @ARGV[2..$#ARGV]);

This line executes the email sending command using the system function. The command is executed with the arguments that were concatenated in the previous step.

Line 11: exit;

This line exits the script.

To use this script, you would save it to a file named mail.pl, make the file executable with chmod +x mail.pl, and then run it from the command line with the following syntax:

./mail.pl [email protected] "Subject line" "Body of the email"

Replace [email protected] with the actual recipient's email address, "Subject line" with the subject line, and "Body of the email" with the body of the email.