03-28-2008
I found a code snippet while via a web search:
struct hostent *hp;
.
.
.
hp = gethostbyname (cat_str);
.
.
.
for (i=0 ......
printf( . . . . . inet_ntoa(*(struct in_addr *)hp->h_addr_list[i]));
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
I have a problem with a Unix server (SCO Unix version 3.2). If this server is rebooted the own server name and it's IP address is removed from the host table.
How is this possible? How can i solve this problem? (3 Replies)
Discussion started by: FIRE
3 Replies
2. UNIX for Advanced & Expert Users
I am using Tru64UX 5.1a on alphaserver 4100.
Users access the application through Telnet sessions to this server.
My requirement is to limit the users login through their PCs only.
Is there any way I can accomplish this on the unix box ?
I want to include a script in the .profile ( or... (1 Reply)
Discussion started by: shauche
1 Replies
3. Solaris
Hi,
I've got a Sun Solaris machine with host ID (840f8e57) and MAC address (0:14:4f:f:8e:57), how do I:
1. Write the MAC address in standard (IEEE 802) format, i.e. xx-xx-xx-xx-xx-xx? Do I need to add 0's before or after the 'f', i.e. 00-14-4f-0f-8e-57 or 00-14-4f-f0-8e-57?
2. What is... (4 Replies)
Discussion started by: TheBlueSky
4 Replies
4. Solaris
Hi
How to get the IP address / Host name of a particular user connected to Unix Server.
For example: If used 'DevUser1' is connected to Unix server. I need to find out from which PC this connection has been made.
How can this be achieved?
Thanks (6 Replies)
Discussion started by: MVL
6 Replies
5. Solaris
Hi All,
In Ultra 10 at time system is not displaying value for Ethernet address and Host ID.
Also, when i am trying to change the value of environment variables i am getting below message and value is not changing
Thanks (4 Replies)
Discussion started by: kumarmani
4 Replies
6. Programming
I'm trying to write a function to get the host name of any given IP address.
I'm trying to follow this manual but I'm stuck. I'm using gcc and Linux. Any ideas?
getnameinfo()
#include <stdio.h>
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>
char... (6 Replies)
Discussion started by: limmer
6 Replies
7. UNIX for Advanced & Expert Users
I do a ssh to remote host(A1) from local host(L1). I then ssh to another remote(A2) from A1.
When I do a who -m from A2, I see the "connected from" as "A1".
=> who -m
userid pts/2 2010-03-27 08:47 (A1)
I want to identify who is the local host who initiated the connection to... (3 Replies)
Discussion started by: gomes1333
3 Replies
8. Red Hat
Hello,
Greetings!!
I have a server with 3 TB of disk space and 12 GB RAM and a i7 processor.
What I did thus far is to install Oracle Enterprise Linux (OEL 5.7)as the host system and install Oracle Virtual box and created 3 VM's. Installed OEL 5.7 on one of the VM, working on installing... (1 Reply)
Discussion started by: rparavastu
1 Replies
9. UNIX for Dummies Questions & Answers
Hi,
In unix or linux is there any command exist to identify Host Name to IP Address or Vice Versa?
Thanks in advance (6 Replies)
Discussion started by: nag_sathi
6 Replies
10. IP Networking
hi,
i want to get the hostname for the specified IP address.
# host www.google.com
www.google.com has address 173.194.69.104
www.google.com has address 173.194.69.105
www.google.com has address 173.194.69.106
www.google.com has address 173.194.69.147
www.google.com has address... (3 Replies)
Discussion started by: kavitha rao
3 Replies
LEARN ABOUT REDHAT
net::hostent
Net::hostent(3pm) Perl Programmers Reference Guide Net::hostent(3pm)
NAME
Net::hostent - by-name interface to Perl's built-in gethost*() functions
SYNOPSIS
use Net::hostent;
DESCRIPTION
This module's default exports override the core gethostbyname() and gethostbyaddr() functions, replacing them with versions that return
"Net::hostent" objects. This object has methods that return the similarly named structure field name from the C's hostent structure from
netdb.h; namely name, aliases, addrtype, length, and addr_list. The aliases and addr_list methods return array reference, the rest
scalars. The addr method is equivalent to the zeroth element in the addr_list array reference.
You may also import all the structure fields directly into your namespace as regular variables using the :FIELDS import tag. (Note that
this still overrides your core functions.) Access these fields as variables named with a preceding "h_". Thus, "$host_obj->name()" corre-
sponds to $h_name if you import the fields. Array references are available as regular array variables, so for example "@{
$host_obj->aliases() }" would be simply @h_aliases.
The gethost() function is a simple front-end that forwards a numeric argument to gethostbyaddr() by way of Socket::inet_aton, and the rest
to gethostbyname().
To access this functionality without the core overrides, pass the "use" an empty import list, and then access function functions with their
full qualified names. On the other hand, the built-ins are still available via the "CORE::" pseudo-package.
EXAMPLES
use Net::hostent;
use Socket;
@ARGV = ('netscape.com') unless @ARGV;
for $host ( @ARGV ) {
unless ($h = gethost($host)) {
warn "$0: no such host: $host
";
next;
}
printf "
%s is %s%s
",
$host,
lc($h->name) eq lc($host) ? "" : "*really* ",
$h->name;
print " aliases are ", join(", ", @{$h->aliases}), "
"
if @{$h->aliases};
if ( @{$h->addr_list} > 1 ) {
my $i;
for $addr ( @{$h->addr_list} ) {
printf " addr #%d is [%s]
", $i++, inet_ntoa($addr);
}
} else {
printf " address is [%s]
", inet_ntoa($h->addr);
}
if ($h = gethostbyaddr($h->addr)) {
if (lc($h->name) ne lc($host)) {
printf " That addr reverses to host %s!
", $h->name;
$host = $h->name;
redo;
}
}
}
NOTE
While this class is currently implemented using the Class::Struct module to build a struct-like class, you shouldn't rely upon this.
AUTHOR
Tom Christiansen
perl v5.8.0 2002-06-01 Net::hostent(3pm)