Thread: inotify woes

Greetings,

I have been playing with a piece of code based mostly on Robert Love's article in the Linux journal and the code (which follows) is simply not doing what it is supposed to be doing. Basically, every time select unblocks after an event, the event mask is the same, even though the events are all different. I am quite certain I have missed something very basic but for the life of me I cannot see it. Here is the code:

Code:

#include <stdio.h>
#include <sys/inotify.h>
#include <sys/select.h>

void print_mask(int );

int main (void)
{
int fd, wd, ret;
struct timeval time;
struct inotify_event *event;
fd_set rfds;


// time out after 10 seconds
time.tv_sec = 5;
time.tv_usec = 0;

fd = inotify_init();
if (fd < 0)
perror ("inotify_init");

wd = inotify_add_watch (fd, "/data/temp", IN_MODIFY|IN_CREATE|IN_DELETE);
if (wd < 0)
perror ("inotify_add_watch");

FD_ZERO (&rfds);
FD_SET (fd, &rfds);

ret = select (fd + 1, &rfds, NULL, NULL, NULL);
if (ret < 0)
perror ("select");
else if (!ret)
printf ("timed out\n");
else if (FD_ISSET (fd, &rfds))
{
if (event->mask & IN_CREATE)
{
printf ("File Created!\n");
print_mask (event->mask);
}
else if (event->mask & IN_DELETE)
{
printf ("File Deleted!\n");
printf("0x%08x\n", event->mask);
}
}

ret = inotify_rm_watch (fd, wd);
if (ret)
perror ("inotify_rm_watch");
if (close(fd))
perror ("close");
return 0;
}

void print_mask(int mask)
{
if (mask & IN_ACCESS)
printf("ACCESS ");
if (mask & IN_MODIFY)
printf("MODIFY ");
if (mask & IN_ATTRIB)
printf("ATTRIB ");
if (mask & IN_CLOSE)
printf("CLOSE ");
if (mask & IN_OPEN)
printf("OPEN ");
if (mask & IN_MOVED_FROM)
printf("MOVE_FROM ");
if (mask & IN_MOVED_TO)
printf("MOVE_TO ");
if (mask & IN_DELETE)
printf("DELETE ");
if (mask & IN_CREATE)
printf("CREATE ");
if (mask & IN_DELETE_SELF)
printf("DELETE_SELF ");
if (mask & IN_UNMOUNT)
printf("UNMOUNT ");
if (mask & IN_Q_OVERFLOW)
printf("Q_OVERFLOW ");
if (mask & IN_IGNORED)
printf("IGNORED " );

if (mask & IN_ISDIR)
printf("(dir) ");
else
printf("(file) ");

printf("0x%08x\n", mask);
}

Any help will be most appreciated. Thanks.