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This chapter is from the book

This chapter is from the book

3.5 close Function

An open file is closed by

    #include <unistd.h>

    int close(int filedes);
   
   Returns: 0 if OK, –1 on error

Closing a file also releases any record locks that the process may have on the file. We'll discuss this in Section 12.3.

When a process terminates, all open files are automatically closed by the kernel. Many programs take advantage of this fact and don't explicitly close open files. See Program 1.2, for example.

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