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Full Discussion: gethostbyname_r returns NULL when hostname has dash
Special Forums IP Networking gethostbyname_r returns NULL when hostname has dash Post 302201019 by uunniixx on Friday 30th of May 2008 05:50:24 PM
Old 05-30-2008
This is wired output but as Era stated I could believe it:

From Unix box:

Code:
11> telnet nyustern-.collegemailer.com 80
telnet: nyustern-.collegemailer.com: Name or service not known
nyustern-.collegemailer.com: Unknown host

12> telnet nyustern.collegemailer.com 80
Trying 209.200.118.155...
Connected to nyustern.collegemailer.com.

From DOS command window:

C:\>telnet nyustern-.collegemailer.com 80


GET / HTTP/1.0
Host: nyustern-.collegemailer.com

HTTP/1.1 302 Object moved
Connection: close

But my issue is how can I resolve this at code level - what I need to do in such a case?
Last edited by uunniixx; 06-02-2008 at 03:04 AM..
 

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LEARN ABOUT DEBIAN

hostname

HOSTNAME(5)							   /etc/hostname						       HOSTNAME(5)

NAME

       hostname - Local host name configuration file

SYNOPSIS

       /etc/hostname

DESCRIPTION

       The /etc/hostname file configures the name of the local system that is set during boot, with the sethostname(2) system call. It should
       contain a single newline-terminated host name string. The host name may be a free-form string up to 64 characters in length, however it is
       recommended that it consists only of 7bit ASCII lower-case characters and no spaces or dots, and limits itself to the format allowed for
       DNS domain name labels, even though this is not a strict requirement.

       Depending on the operating system other configuration files might be checked for configuration of the host name as well, however only as
       fallback.

HISTORY

       The simple configuration file format of /etc/hostname originates from Debian GNU/Linux.

SEE ALSO

       systemd(1), sethostname(2), hostname(1), hostname(7), machine-id(5), machine-info(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
	   Developer

systemd 							    10/07/2013							       HOSTNAME(5)
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