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exit

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C
 
Program support utilities
Program termination
exit
(C11)
(C99)
Unreachable control flow
(C23)
Communicating with the environment
Memory alignment query
(C23)
Signals
Signal types
Non-local jumps
Types
 
Defined in header <stdlib.h>
void exit( int exit_code );
 (until C11)
_Noreturn void exit( int exit_code );
 (since C11)
(until C23)
[[noreturn]] void exit( int exit_code );
 (since C23)

Causes normal program termination to occur.

Several cleanup steps are performed:

  • functions passed to atexit are called, in reverse order of registration
  • all C streams are flushed and closed
  • files created by tmpfile are removed
  • control is returned to the host environment. If exit_code is zero or EXIT_SUCCESS, an implementation-defined status indicating successful termination is returned. If exit_code is EXIT_FAILURE, an implementation-defined status indicating unsuccessful termination is returned. In other cases implementation-defined status value is returned.

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