Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
#type 'perl' for help # #This program scans a C-class subnet and prints the results to corresp +onding text file. #If a computer has once answered the ping, it will not be added to the + list again. #To sort the output type 'perl sort <textfile>' use strict; use Net::Ping; my $host; my $subnet; my %state; my $h; my $time; my $if; my $of; my $line; if ($ARGV[0] eq 'sort'){ &sort; exit; } unless ($subnet=$ARGV[0]){ &usage; exit; } open OF,">>$subnet\.txt"; for $h(1 .. 255){ $host="$subnet\.$h"; $state{$host}='' } while(){ open OF,">>$subnet\.txt"; for $h(1 .. 254){ #sleep 2; $host="$subnet\.$h"; my $p=Net::Ping->new('icmp'); print "\nPinging host $host"; if ($p->ping($host,1)){ print " alive"; if ($state{$host} ne 'up'){ $time=localtime(); print OF "$host\twas up at $time\n"; $state{$host}='up'; } } } close OF; sleep 600 } sub usage{ print" This program scans a C-class subnet and lists all machines, that have answered ping, in a text file. Use this program to sort the output. Usage: perl <subnet> Example: perl 192.168.0 Sort: perl sort <file> Example: perl sort 192.168.0.txt "; } sub sort{ unless ($if=$ARGV[1]){ &usage; exit; } open IF,"$if" or die "Cannot open file $if for read: $!"; $of=">s.$if"; open OF,$of; my @data=<IF>; my @sorted=grep {s/(^|\D)0+(\d)/$1$2/g,1} sort grep {s/(\d+)/sprintf"%06.6d",$1/ge,1} @data; foreach $line(@sorted){ print OF $line; } close IF; close OF; exit; }

In reply to Scan C-Class for used IP-addresses by cab

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    [Lady_Aleena]: Discipulus, then that is a problem. I wanted to find total seconds of my entire .mp3 collection to do some math on it to see how many days of continuous music i have.
    [LanX]: darn. .. I wanted to see Marine and Melonchon go to next round, just for fun xD
    [Discipulus]: LA use Perl: traversing a dir tree is simple; foreach file mp3 $sec+= use Mp3::Info
    [Lady_Aleena]: Discipulus, I was able to get the sum of the seconds on the command line using awk. Then I ran the result through a perl script and got the result. It came bach with 4 days, 9 hours, 56 minutes, 43 seconds.
    [Lady_Aleena]: s/bach/back/;
    [Discipulus]: gired anyway is the intermediate state between hired and fired (and vice versa;)
    [Lady_Aleena]: Discipuluis, I don't know if I want to fight with File::Find. File::Find and I are not friends.
    [Discipulus]: 4 day Bach is too muche even for me
    [Discipulus]: LA you know who is paco?
    [Lady_Aleena]: Disc, nope.

    How do I use this? | Other CB clients
    Other Users?
    Others making s'mores by the fire in the courtyard of the Monastery: (9)
    As of 2017-04-23 20:32 GMT
    Find Nodes?
      Voting Booth?
      I'm a fool:

      Results (432 votes). Check out past polls.