/proc/sys/kernel/real-root-dev

[Juan Pedro Vallejo]

Hello.

# parted /dev/hdc
Warning: Unable to determine if partitions are mounted via
/proc/mounts or /etc/mtab.  Make sure you don't attempt to resize or
modify mounted file systems.  (Even read-only mounted)
Ignore/Cancel?

Version 1.6.4. I don't have a /proc/sys/kernel/real-root-dev file, so
_partition_is_root_device() always fails. Shouldn't it return "I don't
know" instead, like _mount_table_search() does?.

And why the checks in _partition_is_mounted_by_path() are not taken
sequentially?. Like this:

static int
_partition_is_mounted_by_path (const char* path)
{
        static int can_probe = 1;

        if (!can_probe)
                return 0;

        /* try first way */
        switch (_partition_is_root_device (path)) {
                case 1: return 1;       /* it is here */
                case 0: return 0;       /* it is not */
        }
        /* we don't know, try second way */
        switch (_mount_table_search ("/proc/mounts", path)) {
                case 1: return 1;       /* it is here */
                case 0: return 0;       /* it is not */
        }
        /* we don't know, try third way */
        switch (_mount_table_search ("/etc/mtab", path)) {
                case 1: return 1;       /* it is here */
                case 0: return 0;       /* it is not */
        }
        /* we don't know, try last way */
        switch (_mount_table_search ("/proc/swaps", path)) {
                case 1: return 1;       /* it is here */
                case 0: return 0;       /* it is not */
        }

        /* we still don't know, and never will */
        can_probe = 0;

        /* ask the animal */
        return ped_exception_throw (...) != PED_EXCEPTION_IGNORE;
}

Also, the message does not mention the other two files it looks at.

Juan Pedro.