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NetBSD 6.1.5 - man page for exit (netbsd section 3)

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EXIT(3) 			   BSD Library Functions Manual 			  EXIT(3)

     exit -- perform normal program termination

     Standard C Library (libc, -lc)

     #include <stdlib.h>

     exit(int status);

     exit() terminates a process.  The status values EXIT_SUCCESS and EXIT_FAILURE can be used to
     indicate successful and unsuccessful termination, respectively.

     Before termination it performs the following functions in the order listed:

	   1.	Call the functions registered with the atexit(3) function, in the reverse order
		of their registration.

	   2.	Flush all open output streams.

	   3.	Close all open streams.

	   4.	Unlink all files created with the tmpfile(3) function.

     Following this, exit() calls _exit(2).

     Standard C guarantees only that the values zero, EXIT_SUCCESS, and EXIT_FAILURE produce
     meaningful results.  POSIX extends this to guarantee that the least significant 8 bits of
     status are preserved and returned to the parent via wait(2).  Values outside the supported
     range 0-255 are bitwise-truncated; therefore, negative values should not be used.

     The exit() function never returns.

     _exit(2), atexit(3), intro(3), tmpfile(3)

     The exit() function conforms to ANSI X3.159-1989 (``ANSI C89'').

BSD					 January 2, 2012				      BSD
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