On 11/07/2011 01:37 PM, Thomas Weichert wrote:
> Hi,
>
> in the last few days I encountered a problem on my SLES 11.1 Linux
> with the open-iscsi package in version 2.0-871 respectively 0.872. I
> investigated the problem and found out that in my system there are two
> root users with uid = 0 (sadly, this is required). Therefore I digged
> deeper and found out that the problem most probably lies in the two
> code snippets where "root" is defnied explicitely. Those are usr/
> mgmt_ipc.c around line 549 with:
>
> if (!mgmt_peeruser(fd, user) || strncmp(user, "root", PEERUSER_MAX)) {
> err = MGMT_IPC_ERR_ACCESS;
> goto err;
> }
>
> as well as usr/statics.c around line 7:
>
> static struct passwd root_pw = {
> .pw_name = "root",
> }
>
> When the Linux command `whoami` returns something different than
> "root", open-iscsi will not work.
>
> As far as I understand the issue, the function call to mgmt_peeruser()
> in mgmt_ipc.c sets the variable user to the currently logged in user
> name and then it is compared to "root". If my root-user is named
> differently, the strncmp function fails of course. I did not
> investigate the code in statics.c further, whether it plays a role or
> not, since a change to mgmt_ipc.c solves my problem.
>
> Is there a chance to fix this issue just by checking if the user has
> sufficient rights, e.g. has uid=0, or is there any special reason for
> demanding a user named root?
If you have a uid=0, but you do not have the username of root can you
write files like the ones in /etc/iscsi or /var/lib/iscsi or can you
write to some proc/sysfs files like the
/sys/block/sdX/device/queue_depth one?
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