1 /* 2 * onexit.c 3 */ 4 5 #include <stdlib.h> 6 #include <unistd.h> 7 #include "atexit.h" 8 9 static struct atexit *__atexit_list; 10 11 static __noreturn on_exit_exit(int rv) 12 { 13 struct atexit *ap; 14 15 for (ap = __atexit_list; ap; ap = ap->next) { 16 ap->fctn(rv, ap->arg); /* This assumes extra args are harmless */ 17 } 18 19 _exit(rv); 20 } 21 22 int on_exit(void (*fctn) (int, void *), void *arg) 23 { 24 struct atexit *as = malloc(sizeof(struct atexit)); 25 26 if (!as) 27 return -1; 28 29 as->fctn = fctn; 30 as->arg = arg; 31 32 as->next = __atexit_list; 33 __atexit_list = as; 34 35 return 0; 36 } 37
