Why is the exit code 255 instead of -1 in Perl?

Posted by syker on Stack Overflow See other posts from Stack Overflow or by syker
Published on 2010-04-28T02:21:56Z Indexed on 2010/04/28 3:53 UTC
Read the original article Hit count: 299

Filed under:

perl

|

exit

Why is it that when I shift the exit code, $?, in Perl by eight, I get 255 when I expect it to be -1?

© Stack Overflow or respective owner

Related posts about perl

Munin on Centos 6 - missing perl MODULE_COMPAT_5.8.8

as seen on Server Fault - Search for 'Server Fault'
I'm trying to install Munin on a new VPS through yum install munin but I keep getting an error about a missing perl module: Requires: perl(:MODULE_COMPAT_5.8.8). This is the perl version currently installed: v5.10.1. I've searched all around and still haven't found a solution for this. Here's the… >>> More
Pain removing a perl rootkit

as seen on Server Fault - Search for 'Server Fault'
So, we host a geoservice webserver thing at the office. Someone apparently broke into this box (probably via ftp or ssh), and put some kind of irc-managed rootkit thing. Now I'm trying to clean the whole thing up, I found the process pid who tries to connect via irc, but i can't figure out who's… >>> More
How To Avoid a Perl script calling an Another Perl Script

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, i am calling a perl script client.pl from a main script to capture the output of client.pl in @output. is there anyway to avoid the use of these two files so i can use the output of client.pl in main.pl itself here is my code.... main.pl ======= my @output = readpipe("client.pl"); client… >>> More
Perl :how to sort dates in perl

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, How can I sort the dates in perl. my @dates = ( "02/11/2009" , "12/20/2001" , "11/21/2010" ) ; I have above dates in my array . How can I sort those dates... ? My date format is dd/mm/YYYY. >>> More
please suggest a perl book exclusively for perl programs

as seen on Stack Overflow - Search for 'Stack Overflow'
I want tha name of a perl book for only PERL PROGRAMS. The reason behind is I want to improve my programming skill in perl >>> More

Related posts about exit

Non-zero exit status for clean exit

as seen on Programmers - Search for 'Programmers'
Is it acceptable to return a non-zero exit code if the program in question ran properly? For example, say I have a simple program that (only) does the following: Program takes N arguments. It returns an exit code of min(N, 255). Note that any N is valid for the program. A more realistic program… >>> More
ExtJS : handling browser exit event (click on cross-exit)

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi everybody, First of all, thank you for reading my question. I would like to know if there is any way to handle the browser exit event. For example, I would like to send a query when the user click on the cross-exit or simply close his browser. Thanks a lot. $t0rM >>> More
aide --init show lots of errors

as seen on Server Fault - Search for 'Server Fault'
I have a brand new centos 6.2 server. The first thing I did is yum -y install aide and then next I did aide --init. Below is a whole lot of errors I got.What does it means must I reinstall it? Or leave it ? /usr/sbin/prelink: /usr/sbin/lusermod: at least one of file's dependencies has changed since… >>> More
Recursion causes exit to exit all JFrames (terminates app)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have made an application that gives the user the option to open up a new spawn of the application entirely. When the user does so and closes the application the entire application terminates; not just the window. How should I go about recursively spawning an application and then when the user exits… >>> More
Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in java

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi I like to know difference between the following in java System.exit(0); System.exit(-1); System.exit(1); When do I have to use the above code appropriately. Thanks >>> More