Package: blktool Version: 4-6 Severity: normal blktool can't set devices readonly because it doesn't pass the right parameters to the ioctl.
Set up a test device: $ echo hello > /tmp/foo $ sudo losetup /dev/loop7 /tmp/foo Test read-only status with two tools: $ sudo blktool /dev/loop7 readonly off $ sudo blockdev --getro /dev/loop7 0 Try setting read-only with blktool -- this fails: $ sudo blktool /dev/loop7 readonly on BLKROSET: Bad address $ sudo blktool /dev/loop7 readonly off $ sudo blockdev --getro /dev/loop7 0 Try setting read-only with blockdev -- this works: $ sudo blockdev --setro /dev/loop7 $ sudo blktool /dev/loop7 readonly on $ sudo blockdev --getro /dev/loop7 1 See the difference for why blktool fails and why blockdev succeeds: $ sudo strace -e ioctl blktool /dev/loop7 readonly on ioctl(3, BLKROSET, 0x1) = -1 EFAULT (Bad address) BLKROSET: Bad address $ sudo strace -e ioctl blockdev --setro /dev/loop7 ioctl(3, BLKROSET, 0x7fff1cd4ea98) = 0 -jim -- System Information: Debian Release: 6.0 APT prefers testing APT policy: (300, 'testing'), (50, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 3.0.0-1-amd64 (SMP w/2 CPU cores) Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages blktool depends on: ii libc6 2.11.2-10 Embedded GNU C Library: Shared lib ii libglib2.0-0 2.28.6-1 The GLib library of C routines blktool recommends no packages. blktool suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
