package AN::Tools::System ;
#
# This module contains methods used to handle common system tasks.
#
use strict ;
use warnings ;
use Data::Dumper ;
our $ VERSION = "3.0.0" ;
my $ THIS_FILE = "System.pm" ;
### Methods;
# call
# check_daemon
# start_daemon
= pod
= encoding utf8
= head1 NAME
AN::Tools:: System
Provides all methods related to storage on a system .
= head1 SYNOPSIS
use AN::Tools ;
# Get a common object handle on all AN::Tools modules.
my $ an = AN::Tools - > new ( ) ;
# Access to methods using '$an->System->X'.
#
# Example using 'system_call()';
my $ hostname = $ an - > System - > call ( { shell_call = > $ an - > data - > { path } { exe } { hostname } } ) ;
= head1 METHODS
Methods in this module ;
= cut
sub new
{
my $ class = shift ;
my $ self = { } ;
bless $ self , $ class ;
return ( $ self ) ;
}
# Get a handle on the AN::Tools object. I know that technically that is a sibling module, but it makes more
# sense in this case to think of it as a parent.
sub parent
{
my $ self = shift ;
my $ parent = shift ;
$ self - > { HANDLE } { TOOLS } = $ parent if $ parent ;
return ( $ self - > { HANDLE } { TOOLS } ) ;
}
#############################################################################################################
# Public methods #
#############################################################################################################
= head2 call
This method makes a system call and returns the output ( with the last new - line removed ) . If there is a problem , 'C<< #!error!# >>' is returned and the error will be logged .
Parameters ;
= head3 line ( optional )
This is the line number of the source file that called this method . Useful for logging and debugging .
= head3 secure ( optional )
If set to 'C<< 1 >>' , the shell call will be treated as if it contains a password or other sensitive data for logging .
= head3 shell_call ( required )
This is the shell command to call .
= head3 source ( optional )
This is the name of the source file calling this method . Useful for logging and debugging .
= cut
sub call
{
my $ self = shift ;
my $ parameter = shift ;
my $ an = $ self - > parent ;
my $ line = defined $ parameter - > { line } ? $ parameter - > { line } : __LINE__ ;
my $ shell_call = defined $ parameter - > { shell_call } ? $ parameter - > { shell_call } : "" ;
my $ secure = defined $ parameter - > { secure } ? $ parameter - > { secure } : 0 ;
my $ source = defined $ parameter - > { source } ? $ parameter - > { source } : $ THIS_FILE ;
$ an - > Log - > variables ( { source = > $ source , line = > $ line , level = > 2 , secure = > $ secure , list = > { shell_call = > $ shell_call } } ) ;
my $ output = "#!error!#" ;
if ( not $ shell_call )
{
# wat?
$ an - > Log - > entry ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 0 , priority = > "err" , key = > "log_0043" } ) ;
}
else
{
# Make the system call
$ output = "" ;
$ an - > Log - > entry ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 3 , secure = > $ secure , key = > "log_0011" , variables = > { shell_call = > $ shell_call } } ) ;
open ( my $ file_handle , $ shell_call . " 2>&1 |" ) or $ an - > Log - > entry ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 0 , secure = > $ secure , priority = > "err" , key = > "log_0014" , variables = > { shell_call = > $ shell_call , error = > $! } } ) ;
while ( <$file_handle> )
{
chomp ;
my $ line = $ _ ;
$ line =~ s/\n$// ;
$ line =~ s/\r$// ;
$ an - > Log - > entry ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 3 , secure = > $ secure , key = > "log_0017" , variables = > { line = > $ line } } ) ;
$ output . = $ line . "\n" ;
}
close $ file_handle ;
chomp ( $ output ) ;
$ output =~ s/\n$//s ;
}
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 3 , secure = > $ secure , list = > { output = > $ output } } ) ;
return ( $ output ) ;
}
= head2 check_daemon
This method checks to see if a daemon is running or not . If it is , it returns 'C<< 1 >>' . If the daemon isn 't running, it returns ' C << 0 >> '. If the daemon wasn' t found , 'C<< 2 >>' is returned .
Parameters ;
= head3 daemon ( required )
This is the name of the daemon to check .
= cut
sub check_daemon
{
my $ self = shift ;
my $ parameter = shift ;
my $ an = $ self - > parent ;
my $ return = 2 ;
my $ daemon = defined $ parameter - > { daemon } ? $ parameter - > { daemon } : "" ;
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 3 , list = > { daemon = > $ daemon } } ) ;
my $ output = $ an - > System - > call ( { shell_call = > $ an - > data - > { path } { exe } { systemctl } . " status " . $ daemon . ".service; " . $ an - > data - > { path } { exe } { 'echo' } . " return_code:\$?" } ) ;
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 3 , list = > { output = > $ output } } ) ;
foreach my $ line ( split /\n/ , $ output )
{
if ( $ line =~ /return_code:(\d+)/ )
{
my $ return_code = $ 1 ;
if ( $ return_code eq "3" )
{
$ return = 0 ;
}
elsif ( $ return_code eq "0" )
{
$ return = 1 ;
}
}
}
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 3 , list = > { 'return' = > $ return } } ) ;
return ( $ return ) ;
}
= head2 start_daemon
This method starts a daemon .
Parameters ;
= head3 daemon ( required )
This is the name of the daemon to start .
= cut
sub start_daemon
{
my $ self = shift ;
my $ parameter = shift ;
my $ an = $ self - > parent ;
my $ return = 2 ;
my $ daemon = defined $ parameter - > { daemon } ? $ parameter - > { daemon } : "" ;
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 2 , list = > { daemon = > $ daemon } } ) ;
my $ output = $ an - > System - > call ( { shell_call = > $ an - > data - > { path } { exe } { systemctl } . " start " . $ daemon . ".service; " . $ an - > data - > { path } { exe } { 'echo' } . " return_code:\$?" } ) ;
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 2 , list = > { output = > $ output } } ) ;
foreach my $ line ( split /\n/ , $ output )
{
if ( $ line =~ /return_code:(\d+)/ )
{
my $ return_code = $ 1 ;
if ( $ return_code eq "3" )
{
$ return = 0 ;
}
elsif ( $ return_code eq "0" )
{
$ return = 1 ;
}
}
}
$ an - > Log - > variables ( { source = > $ THIS_FILE , line = > __LINE__ , level = > 2 , list = > { 'return' = > $ return } } ) ;
return ( $ return ) ;
}
# =head3
#
# Private Functions;
#
# =cut
#############################################################################################################
# Private functions #
#############################################################################################################
1 ;