ultrix man page for abort

abort(3)						     Library Functions Manual							  abort(3)

Name
       abort - generate an illegal instruction fault

Syntax
       #include <stdlib.h>

       void abort()

Description
       The  subroutine	executes  an  instruction which is illegal in user mode.  This causes a signal that normally terminates the process with a
       core dump, which may be used for debugging.

Diagnostics
       Illegal instruction - core dumped
	-  Bourne shell.

       Illegal instruction (core dumped)
	-  C shell.

Environment
       When your program is compiled using the System V or POSIX environment, closes open files before aborting the process with an IOT fault.

Restrictions
       The function does not flush standard I/O buffers.  Use For further information, see

See Also
       adb(1), exit(2), sigvec(2), fclose(3s)

																	  abort(3)