_Exit
From cppreference.com
C
Concurrency support (C11)
Program support utilities
Program termination
Unreachable control flow
(C23)
Communicating with the environment
(C11)
Memory alignment query
(C23)
Signals
Signal types
Non-local jumps
Types
Defined in header
<stdlib.h>
void _Exit( int exit_code );
(since C99) (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 without completely cleaning the resources.
Functions passed to at_quick_exit() or atexit() are not called. Whether open streams with unwritten buffered data are flushed, open streams are closed, or temporary files are removed is implementation-defined.
If exit_code is 0 or EXIT_SUCCESS , an implementation-defined status indicating successful termination is returned to the host environment. If exit_code is EXIT_FAILURE , an implementation-defined status, indicating unsuccessful termination, is returned. In other cases an implementation-defined status value is returned.
[edit] Parameters
exit_code
-
exit status of the program
[edit] Return value
(none)
[edit] Example
Run this code
#include <stdlib.h> #include <stdio.h> /* _Exit does not call functions registered with atexit. */ void f1(void) { puts ("pushed first"); } void f2(void) { puts ("pushed second"); } int main(void) { printf ("Enter main()\n"); atexit (f1); atexit (f2); fflush (stdout ); /* _Exit may not flush unwritten buffered data */ _Exit(0); }
Output:
Enter main()
[edit] References
- C17 standard (ISO/IEC 9899:2018):
- 7.22.4.5 The _Exit function (p: 256)
- C11 standard (ISO/IEC 9899:2011):
- 7.22.4.5 The _Exit function (p: 352)
- C99 standard (ISO/IEC 9899:1999):
- 7.20.4.4 The _Exit function (p: 316)
[edit] See also
C++ documentation for _Exit