Hi,
> I am trying to add inotify support to my tail implementation (for -F).
> This is what happens:
>
> inotify_init() = 4
> inotify_add_watch(4, "/tmp/foo", IN_MODIFY) = 1
> inotify_rm_watch(4, 1) = -1 EINVAL (Invalid argument)
> inotify_add_watch(4, "/tmp/foo", IN_MODIFY) = 2
>
> There is also some polling, some reading and some statting going on here, but
> those are on other descriptors than 4 so they should not matter).
>
> Can somebody explain the EINVAL I'm getting from inotify_rm_watch to me?
> This is a stock kernel 4.5.0.
#include <stdio.h>
#include <sys/inotify.h>
int main() {
int fd, i, j;
printf("init %d\n", fd=inotify_init()); // 3
printf("add %d\n", i=inotify_add_watch(fd, "/tmp/foo", IN_MODIFY)); // 1
printf("rm %d\n", inotify_rm_watch(fd, i)); // 0
printf("add %d\n", j=inotify_add_watch(fd, "/tmp/foo", IN_MODIFY)); // 2
return 0;
}
Ubuntu kernel x86_64 4.4.0-21, seems to work here
so we have to guess what's going on between _add and _rm?
regards, p.
--
Peter Meerwald-Stadler
+43-664-2444418 (mobile)
