Help in C!

[steve]

I am trying to write a C program to write the following information. Does
anyone know what files I need to search to find the answers to the following
questions?

Steve

what is my host name?
who is my DNS server?
who is my NIS server?
I am NIS server.
I am DNS server.
what order I resolve host names?
what is my domain name?
who I mount NFS from?
do I mount AFS?
what file system I am sharing and whom I am sharing it to?
what is my IP address(es)?
am I a web server?
am I a route? if yes what do I route?
what UNIX system am I running?
who is (are) my DNS server(s)?
who is (are) my NIS server(s)?
I am NIS+ server.
who is my NIS+ master server.
where do I check user names and passwords from?
where do I check network services?

[Tom Brennan]

Hmmm...Best thing for you to do is get this book - Publishers is Wrox Press,
Ttitle Linux Programming 2nd Edition, it will contain the answers to most
of your questions....personally you could get away with it using a shell
script which would be made much easier unless you want to write an administrator
program to do all of this.....
"steve" <SteveCusick@bigfoot.com> wrote:
>
>I am trying to write a C program to write the following information. Does
>anyone know what files I need to search to find the answers to the following
>questions?
>
>Steve
>
>what is my host name?
>who is my DNS server?
>who is my NIS server?
>I am NIS server.
>I am DNS server.
>what order I resolve host names?
>what is my domain name?
>who I mount NFS from?
>do I mount AFS?
>what file system I am sharing and whom I am sharing it to?
>what is my IP address(es)?
>am I a web server?
>am I a route? if yes what do I route?
>what UNIX system am I running?
snip>>>>
try uname -a
>who is (are) my DNS server(s)?
>who is (are) my NIS server(s)?
>I am NIS+ server.
>who is my NIS+ master server.
>where do I check user names and passwords from?
snip>>>
There is a function to read from the passwd file and will tell you what
shell etc....cannot remember the function, the passwords/users etc are located
in /etc/passwd. Beware that the passwd file itself could be shadowed ie.
you will not see the passwd and need root privileges to look into it!!!

>where do I check network services?
snip>>>>
look in /etc/services...some distros have their own front end ...eg suse
6.3 (which I have) comes with yast which will allow you to glance at what
your ip address is etc.....
>

[joe]

I agree that a shell script would do this easier, but there are system functions
you can call to do this as well. If you want to read files though i've put
what i know below.

"Tom Brennan" <tommieb@dds.nl> wrote:
>
>Hmmm...Best thing for you to do is get this book - Publishers is Wrox Press,
>Ttitle Linux Programming 2nd Edition, it will contain the answers to most
>of your questions....personally you could get away with it using a shell
>script which would be made much easier unless you want to write an administrator
>program to do all of this.....
>"steve" <SteveCusick@bigfoot.com> wrote:
>>
>>I am trying to write a C program to write the following information. Does
>>anyone know what files I need to search to find the answers to the following
>>questions?
>>
>>Steve
>>
>>what is my host name?

hostname or hostname.something

>>who is my DNS server?

resolv.conf

>>who is my NIS server?
>>I am NIS server.
>>I am DNS server.
>>what order I resolve host names?

nsswitch.conf

>>what is my domain name?

resolv.conf

>>who I mount NFS from?

mnttab or fstab (I forget which one on Linux)

>>do I mount AFS?
>>what file system I am sharing and whom I am sharing it to?

smb.conf (?)

>>what is my IP address(es)?

ifconfig [interface name] is the command

>>am I a web server?

look for apache.conf and httpd processes

>>am I a route? if yes what do I route?
>>what UNIX system am I running?
>snip>>>>
> try uname -a
>>who is (are) my DNS server(s)?

resolv.conf

>>who is (are) my NIS server(s)?
>>I am NIS+ server.
>>who is my NIS+ master server.
>>where do I check user names and passwords from?
>snip>>>
> There is a function to read from the passwd file and will tell you what
>shell etc....cannot remember the function, the passwords/users etc are located
>in /etc/passwd. Beware that the passwd file itself could be shadowed ie.
>you will not see the passwd and need root privileges to look into it!!!
>
>>where do I check network services?
>snip>>>>
> look in /etc/services...some distros have their own front end ...eg suse
>6.3 (which I have) comes with yast which will allow you to glance at what
>your ip address is etc.....
>>
>