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perl - rough template thats outputs to screen & log file
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#! /usr/bin/perl | |
use strict; | |
use warnings; | |
use 5.010; | |
use Time::HiRes qw/time gettimeofday/; | |
use POSIX 'strftime'; | |
use FileHandle ('autoflush'); | |
use Getopt::Std; | |
my %opt; | |
sub usage() | |
{ | |
say "Usage = ???.pl [-v] -l <filename>"; | |
exit 58; | |
} | |
sub main() | |
{ | |
parse_args(); | |
say "VERBOSE ENABLED = [$opt{v}]" if $opt{v}; | |
say "FILE LOGGING ENABLED = [$opt{l}]" if exists $opt{l}; | |
while(1) | |
{ | |
out("LOG TEST @ epoch " . time()); | |
sleep(1); | |
} | |
} | |
sub parse_args() | |
{ | |
use Getopt::Std; | |
my $opt_string = 'vhl:'; # -v=verbose // -h=help // -l = output to log file | |
getopts( "$opt_string", \%opt ) or usage(); | |
usage() if $opt{h}; | |
if($opt{l}) | |
{ | |
if(!open(LOG,">$opt{l}")) { die "FILE ERROR" }; | |
LOG->autoflush(1); | |
} | |
} | |
# log to screen + if enabled log to file | |
sub out | |
{ | |
my $data = shift; # get the "text" to output | |
my $msg = now() . " : PID[$$] THREAD[$$] FILENAME[$0] STARTTIME[$^T]: " . $data; # $_[0]; # prefix a timestamp | |
say "$msg"; # to STDOUT | |
if($opt{l}) # if enabled to FILE | |
{ | |
say LOG "$msg"; | |
} | |
} | |
# a decent "datetime" string | |
sub now | |
{ | |
my ($epoch, $microseconds) = gettimeofday; | |
my $now = strftime( q/%Y:%m:%d %H:%M:%S./, localtime($epoch)) . sprintf("%06d", $microseconds); | |
return $now; | |
} | |
main(); | |
exit 0; |
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