UNIX and C

There is a very close link between C and most operating systems that run our C programs. Almost the whole of the UNIX operating system is written in C. This Chapter will look at how C and UNIX interface together.

We have to use UNIX to maintain our file space, edit, compile and run programs etc. (Appendix ).

However UNIX is much more useful than this:

• Advantages of using UNIX with C
• Using UNIX System Calls and Library Functions
• File and Directory Manipulation
  • Directory handling functions
  • File Manipulation Routines
  • errno
• Process Control and Management
  • Running UNIX Commands from C
    • execl()
    • fork()
    • wait()
    • exit()
  • Piping in a C program
    • popen() - Formatted Piping
    • pipe() - Low level Piping
  • Interrupts and Signals
    • Sending Signals - kill()
    • Receiving signals - signal()
• Times Up!!
• Exercises