_Exit

void _Exit( int exit_code );

_Noreturn void _Exit( int exit_code );

Causes normal program termination to occur without completely cleaning the resources.

Destructors of variables with automatic, thread local and static storage durations are not called. Functions passed to at_quick_exit() or atexit() are not called. Whether open resources such as files are closed is implementation defined. If exit_code is EXIT_FAILURE, an implementation-defined status, indicating unsuccessful termination, is returned. In other cases implementation-defined status value is returned.

Parameters

Return value

(none).

Example

#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 does not flush unwritten buffered data */
    _Exit(0);
}

Enter main()

References

• 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)

See also