Types of System Calls

• System calls can be grouped roughly into six major categories:
  • process control, file manipulation, device manipulation, information maintenance, communications,
  • protection.
• Some of the most heavily used POSIX system calls, or more specifically, the library procedures that make those system calls are given in Fig. 2.32.

  Figure 2.32: Some of the major POSIX system calls.

  
• Fig. 2.33 gives some examples of Windows and Unix System Calls.

Figure 2.33: Examples of Windows and Unix System Calls.