Programming

Hi guys, i'm programming in C for Linux but i preferred to program in FreeBSD and some FreeBSD system calls are not available in Linux and i want to make my code portable but i don't now really how, but i think if i used some C preprocessors i can make it portable, and the problems is that i don't know how. I'd appreciate if someone enlightened me. Thank you in advance.

What you want to do is get a copy of Stevens 'Advanced Programming in the UNIX Environment'

It shows all of the system calls for linux/solaris/FreeBSD and shows how to get portability.

...your question involves a lot more than you may think.

What system calls have you found to be missing?

unless you are coding based on POSIX standards it doesn't matter what platform your are using. all of them will do the trick.
"Advanced Programming in the UNIX Environment" is one of the best (no i think the best) books for this problem.

If you want portability, you should not be using FreeBSD specific APIs. Stick to the set of APIs defined by the POSIX.1 standard.

The original APUE from Steven's has been reworked by Rago, which gave birth the APUE 2nd edition, see APUE2e. This book is good, no point.

The most recent and comprehensive resource about UNIX system programming, is in my opinion Michael Kerrisk's book: The Linux Programming Interface . While this book deals with Linux specifics, it emphasizes on UNIX standards and writing portable programs.

HTH,
Loïc

I'm sorry about the delay on answering, now in "Advanced Programming" we are working with "Shared memory" to work with functions as shmat(),shmdt(), shmctl(),... and so on i need to include these libraries: sys/ipc.h, sys/ipc.h, sys/shm.h and machine/param.h, and the last one isn't a C library in Linux, i'm wondering how i can include then only if i am running FreeBSD.