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Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up pthread bus bus error c++ error up vote 2 down vote favorite I'm doing an exercise. The goal is to make a program in C to crack DES encrypted password. Right now I have the following flow of execution: Load dictionary. Dictionary search. Brute force search of the first 4 characters. Dictionary search combined with brute force (searching for combinations). Only dictionary words of 7-6 characters. Brute force search of bus error linux the first 5 characters. Dictionary search combined with brute force (searching for combinations). Only dictionary words of 5-4 characters. Brute force search of up to 8 characters. The program works fine, but I want to improve it by using multiple threads: 1st thread - main 2nd thread - dictionary and dictionary combined with brute force search 3rd thread - brute force search I've started by making a basic dictionary search thread function, but it fails with Bus Error (Mac OS X) where it should start reading words from the dictionary file. Same code works fine in the regular non- thread function... Here is the code: #include
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Tutorials Poetry RecentThreads NewestNodes Donate What'sNew on Aug 11, 2008 at 23:34UTC ( #703767=perlquestion: print w/replies, xml ) Need Help?? ewhitt has asked for the wisdom of the Perl Monks concerning the following question: I came across this script I have been using http://www.perlmonks.org/?node_id=703767 for handling multiple socket connections. I am new to IO::Socket in general. When https://ubuntuforums.org/showthread.php?t=2173331 a client disconnects, the server ends with a "Bus Error". I am doing this on OSX 10.5.1. Any ideas? #!/usr/bin/perl use strict; use warnings; use IO::Socket; use threads; system("clear"); print "Server Listening on tcp/7890\n"; my $lsn = new IO::Socket::INET( Listen => '10', LocalPort => '7890', Proto => 'tcp', ReUse => 1, ) or bus error die $!; sub do_stuff { my $sock = shift; print "Client connected\n"; while( my $input = <$sock> ) { chomp( $input ); print "$input\n"; } print "Client disconnected\n"; } threads->create( \&do_stuff, $lsn->accept, )->detach while 1; [download] Comment on Bus Error from threading IO::SocketDownload Code Replies are listed 'Best First'. Re: Bus Error from threading IO::Socket by snoopy (Deacon) on Aug 12, 2008 at 02:35UTC I also get bus error in the bus error on OSX 10.5.1. Runs fine for me on Debian. I notice that the bus error goes away when you don't detach the thread, ie, works fine when I change the last line to: threads->create( \&do_stuff, $lsn->accept, ) while 1; [download] Detached threads seem to be a contributing factor. [reply][d/l] Re: Bus Error from threading IO::Socket by jethro (Monsignor) on Aug 12, 2008 at 02:10UTC Just tested the script on my linux box and it worked flawlessly. Is perl included with Mac OS or did you install it? [reply] Re: Bus Error from threading IO::Socket by Perlbotics (Canon) on Aug 12, 2008 at 10:55UTC When the client disconnects, the process usually receives a SIGPIPE signal. That might also contribute to your problem when the corresponding (unaccessible?) handler is called. You might want to install a signal handler to further investigate this? Do you see the "Client disconnected" message? Please add $|=1; early to do_stuff so buffering will not swallow this message. Another Idea: SIGBUS is usually caused by a misaligned memory access. Thus, a change of your dynamically loaded libraries might have caused that (since Perl was compiled). Did you modify LD_LIBRARY_PATH lately? ldd your_perl_executable togeth