Re: [PATCH 2/2] selftests/overlayfs: verify device and inode numbers in /proc/pid/maps

[Andrei Vagin]

On Mon, Dec 11, 2023 at 11:30 AM Andrei Vagin <avagin@xxxxxxxxxx> wrote:
> +static long get_file_dev_and_inode(void *addr, struct statx *stx)
> +{
> +       char buf[4096];
> +       FILE *mapf;
> +
> +       mapf = fopen("/proc/self/maps", "r");
> +       if (mapf == NULL)
> +               return pr_perror("fopen(/proc/self/maps)");
> +
> +       while (fgets(buf, sizeof(buf), mapf)) {
> +               unsigned long start, end;
> +               uint32_t maj, min;
> +               __u64 ino;
> +
> +               if (sscanf(buf, "%lx-%lx %*s %*s %x:%x %llx",
> +                               &start, &end, &maj, &min, &ino) != 5)

inode is shown in the decimal format, so the last %llx has to be
replaced with %llu.
I will resend this test in reply to Amir's version of the first patch.

Thanks,
Andrei