hello friends., while i was checking some programs, i have found those header files
<stdio.h>
<sys/types.h>
<sys/socket.h>
<netinet/in.h>
<netdb.h>
and i have never heard of them


then i have checked some c refrences such as http://www.dinkumware.com/

but also i couldn;t find those header files

i wonder if those files are system dependant or what ??

>then i have checked some c refrences such as
>http://www.dinkumware.com/
>but also i couldn;t find those header files

strange, what version of the internet are you using, maybe you should update it.

http://www.dinkumware.com/manuals/reader.aspx?b=c/&h=stdio.html

the other header part of the GNU Standard C library and they are usualy covered by the POSIX standard or by some RFC
sys/types.h and sys/socket.h are standard POSIX headers.

the rest are RFC headers, don't know if they're guaranteed to exist on other Unix systems.
you should try

man -S3 -K netdb.h
man -S3 -K netinet/in.h

and you can laways query your package management system to see where these files came from (in mandrake you would do urpmf netdb.h).

cheers,
Alaa

thanks alaa,
you were really helpful, but i wonder what is posix???!!
and where can i find a refrence for them
thanks again

posix is a the standard that allunix based systems adhere to and it define(among other things) the standard c calls that is portable among versions and implementations of UNIX
bye

Joe

POSIX: Portable Operating System Extensions
The posix standard requires a set of tools to be on the system with unified command line arguments, A special header files/structs/functions to be present to ensure the portability of apps. on all posix compliant systems
search google for the standard, I remember i had a copy but i donno where it is.

Can be found online at:
http://www.opengroup.org/onlinepubs/007904975/toc.htm

Hicham

thanks people ;)