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.