doatexit.c

unix环境高级编程的源代码

#include    "ourhdr.h"
static void    my_exit1(void), my_exit2(void);
int
main(void)
{
    if (atexit(my_exit2) != 0)
        err_sys("can't register my_exit2");
    if (atexit(my_exit1) != 0)
        err_sys("can't register my_exit1");
    if (atexit(my_exit1) != 0)
        err_sys("can't register my_exit1");
    printf("main is done\n");
    return(0);
}
static void
my_exit1(void)
{
    printf("first exit handler\n");
}
static void
my_exit2(void)
{
    printf("second exit handler\n");
}