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/*
* This test program will register the maximum number of exit functions
* with on_exit(). When this program exits, each exit function should get
* called in the reverse order in which it was registered. (If the system
* supports more than 25 exit functions, the function names will loop, but
* the effect will be the same. Feel free to add more functions if desired)
*/
#include <stdio.h>
#include <stdlib.h>
typedef void (*efuncp) (int, void *);
/* All functions call exit(), in order to test that exit functions can call
* exit() without screwing everything up. The value passed in through arg gets
* used as the next exit status.
*/
static void exitfunc0(int status, void *arg) { printf("Executing exitfunc0 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc1(int status, void *arg) { printf("Executing exitfunc1 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc2(int status, void *arg) { printf("Executing exitfunc2 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc3(int status, void *arg) { printf("Executing exitfunc3 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc4(int status, void *arg) { printf("Executing exitfunc4 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc5(int status, void *arg) { printf("Executing exitfunc5 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc6(int status, void *arg) { printf("Executing exitfunc6 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc7(int status, void *arg) { printf("Executing exitfunc7 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc8(int status, void *arg) { printf("Executing exitfunc8 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc9(int status, void *arg) { printf("Executing exitfunc9 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc10(int status, void *arg) { printf("Executing exitfunc10 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc11(int status, void *arg) { printf("Executing exitfunc11 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc12(int status, void *arg) { printf("Executing exitfunc12 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc13(int status, void *arg) { printf("Executing exitfunc13 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc14(int status, void *arg) { printf("Executing exitfunc14 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc15(int status, void *arg) { printf("Executing exitfunc15 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc16(int status, void *arg) { printf("Executing exitfunc16 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc17(int status, void *arg) { printf("Executing exitfunc17 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc18(int status, void *arg) { printf("Executing exitfunc18 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc19(int status, void *arg) { printf("Executing exitfunc19 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc20(int status, void *arg) { printf("Executing exitfunc20 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc21(int status, void *arg) { printf("Executing exitfunc21 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc22(int status, void *arg) { printf("Executing exitfunc22 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc23(int status, void *arg) { printf("Executing exitfunc23 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static void exitfunc24(int status, void *arg) { printf("Executing exitfunc24 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
static efuncp func_table[] =
{
exitfunc0, exitfunc1, exitfunc2, exitfunc3, exitfunc4,
exitfunc5, exitfunc6, exitfunc7, exitfunc8, exitfunc9,
exitfunc10, exitfunc11, exitfunc12, exitfunc13, exitfunc14,
exitfunc15, exitfunc16, exitfunc17, exitfunc18, exitfunc19,
exitfunc20, exitfunc21, exitfunc22, exitfunc23, exitfunc24
};
/* glibc dynamically adds exit functions, so it will keep adding until
* it runs out of memory! So this will limit the number of exit functions
* we add in the loop below. uClibc has a set limit (currently 20), so the
* loop will go until it can't add any more (so it should not hit this limit).
*/
#define ON_EXIT_LIMIT 20
int
main ( void )
{
int i = 0;
unsigned long count = 0;
int numfuncs = sizeof(func_table)/sizeof(efuncp);
/* loop until no more can be added */
while(count < ON_EXIT_LIMIT && on_exit(func_table[i], (void *)count) >= 0) {
count++;
printf("Registered exitfunc%d with on_exit()\n", i);
i = (i+1) % numfuncs;
}
printf("%lu functions registered with on_exit.\n", count);
exit(count);
}
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