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Full Discussion: retrieve IP of local machine
Top Forums Programming retrieve IP of local machine Post 96679 by matrixmadhan on Monday 23rd of January 2006 12:11:15 AM
Old 01-23-2006
try this,

Code:
# include<netdb.h>
# include<stdio.h>
# include<netinet/in.h>
# include<arpa/inet.h>
# include<sys/socket.h>

int main(int argc, char *argv[])
{
long conv;
struct hostent *h;
if(argc != 2)
{
fprintf(stderr, "USAGE: <binary> <IP_ADDRESS>\n");
exit(1);
}
if( (int) (conv=inet_addr(argv[1])) == -1 )
{
fprintf(stderr, "IP Notation Wrong\n");
exit(1);
}
h=gethostbyaddr((char*)&conv, sizeof(conv), AF_INET);
if(h == (struct hostent *) NULL)
{
fprintf(stderr, "Resolve failed for %s\n", argv[1]);
exit(1);
}
fprintf(stderr, "Name: %s\n", h->h_name);
return 0;
}

 

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LEARN ABOUT HPUX

systemd-machine-id-commit.service

SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)			 systemd-machine-id-commit.service		      SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)

NAME

       systemd-machine-id-commit.service - Commit a transient machine ID to disk

SYNOPSIS

       systemd-machine-id-commit.service

DESCRIPTION

       systemd-machine-id-commit.service is an early boot service responsible for committing transient /etc/machine-id files to a writable disk
       file system. See machine-id(5) for more information about machine IDs.

       This service is started after local-fs.target in case /etc/machine-id is a mount point of its own (usually from a memory file system such
       as "tmpfs") and /etc is writable. The service will invoke systemd-machine-id-setup --commit, which writes the current transient machine ID
       to disk and unmount the /etc/machine-id file in a race-free manner to ensure that file is always valid and accessible for other processes.
       See systemd-machine-id-setup(1) for details.

       The main use case of this service are systems where /etc/machine-id is read-only and initially not initialized. In this case, the system
       manager will generate a transient machine ID file on a memory file system, and mount it over /etc/machine-id, during the early boot phase.
       This service is then invoked in a later boot phase, as soon as /etc has been remounted writable and the ID may thus be committed to disk to
       make it permanent.

SEE ALSO

       systemd(1), systemd-machine-id-setup(1), machine-id(5), systemd-firstboot(1)

systemd 237												      SYSTEMD-MACHINE-ID-COMMIT.SERVICE(8)
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