Register functions to be called during program termination via quick_exit()
#include <stdlib.h> int at_quick_exit( void (*func)(void) );
void func( void );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The at_quick_exit() function registers a function to be called when the program terminates via a call to quick_exit(). If you register more than one function with at_quick_exit(), they're executed in a last-in, first-out order.
0 for success, or nonzero if an error occurs.
#include <stdio.h> #include <stdlib.h> void func1( void ) { printf( "last.\n" ); } void func2( void ) { printf( "this " ); } void func3( void ) { printf( "Do " ); } int main( void ) { at_quick_exit( func1 ); at_quick_exit( func2 ); at_quick_exit( func3 ); printf( "Do this first.\n" ); quick_exit( EXIT_SUCCESS ); }
produces the output:
Do this first. Do this last.