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Last login from <ip address>

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Join Date: May 2006

Posts: 1,845

Reputation: ithelp is a name known to all

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ithelp

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Last login from <ip address>

Jan 18th, 2008

You would have seen this message when you telnet to an unix machine, it displays
last login from <ip address> message
What is the sytem command for displaying the same ? Can I code it in C++ without using system command ?

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Join Date: Feb 2005

Posts: 181

Reputation: Paul.Esson is an unknown quantity at this point

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Paul.Esson Paul.Esson is offline

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Junior Poster

Re: Last login from <ip address>

Jan 20th, 2008

Hey,

There is a lastlog command in unix that displays the contents of the /var/log/lastlog file, This is a binary file and a structure describing the contents is located in the <bits/utmp.h> header file

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struct lastlog
{
#if __WORDSIZE == 64 && defined __WORDSIZE_COMPAT32
int32_t ll_time;
#else
__time_t ll_time;
#endif
char ll_line[UT_LINESIZE];
char ll_host[UT_HOSTSIZE];
};

anyhow more useful is prolly this example of a lastlog editor written in C that can be found here