> Hello!
>
> This change makes /proc/net/dev a non-seekable file. There is
> software that depends on it to be seekable (1), surprisingly some
> other files in /proc still work fine after this change.
>
> Minimal C testcase:
> ==
> #include <fcntl.h>
> #include <stdio.h>
> #include <unistd.h>
>
> int main() {
> int fd = open("/proc/net/dev", 0);
> off_t o = lseek(fd, 0, SEEK_SET);
> if (o == -1) {
> perror("lseek");
> }
> }
> ==
>
> 1) https://github.com/scottchiefbaker/dool/issues/111
>
> --
> ŁPM
Thanks for your testcase, I have submitted a patch to fix this:
https://lore.kernel.org/all/20250821105806.1453833-1-wangzijie1@xxxxxxxxx
