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| author | Karel Zak | 2017-05-26 13:11:37 +0200 |
|---|---|---|
| committer | Karel Zak | 2017-06-28 10:28:41 +0200 |
| commit | 92296e9ba2bf95259520fa7537ff8edc2aa9edbc (patch) | |
| tree | f4e80ea53db450e94f9605f733be64cc7dfce90a /misc-utils/wipefs.8 | |
| parent | libblkid: allow to hide already detected signatures (diff) | |
| download | kernel-qcow2-util-linux-92296e9ba2bf95259520fa7537ff8edc2aa9edbc.tar.gz kernel-qcow2-util-linux-92296e9ba2bf95259520fa7537ff8edc2aa9edbc.tar.xz kernel-qcow2-util-linux-92296e9ba2bf95259520fa7537ff8edc2aa9edbc.zip | |
wipefs: print all signature permutations
The same FS/RAID/PT signature may be detected by more ways and on more
places on the device. The libblkid returns only the first detected
signature by default. This patch use blkid_probe_hide_range() to
re-scan device for all possible permutations of the same signature.
For example the default wipefs(8) output as well as --no-act output will
contains primary as well as backup GPT signature now.
Reported-by: Ruediger Meier <sweet_f_a@gmx.de>
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'misc-utils/wipefs.8')
| -rw-r--r-- | misc-utils/wipefs.8 | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/misc-utils/wipefs.8 b/misc-utils/wipefs.8 index b7c7467fe..283c0b0e5 100644 --- a/misc-utils/wipefs.8 +++ b/misc-utils/wipefs.8 @@ -16,9 +16,9 @@ can erase filesystem, raid or partition-table signatures (magic strings) from the specified .I device to make the signatures invisible for libblkid. - .B wipefs does not erase the filesystem itself nor any other data from the device. + When used without any options, \fBwipefs\fR lists all visible filesystems and the offsets of their basic signatures. @@ -27,14 +27,10 @@ calls the BLKRRPART ioctl when it has erased a partition-table signature to inform the kernel about the change. Note that some filesystems and some partition tables store more magic strings on -the device. The +the device (e.g. FAT, ZFS, GPT). The .B wipefs -command lists only the first offset where a magic string has been detected. The device -is not scanned for additional magic strings for the same filesystem. It is possible -that after a \fBwipefs -o \fIoffset\fR the same filesystem or partition -table will still be visible because of another magic string on another offset. The -option \fB\-\-no\-act\fR is also affected by this behavior and only the first -magic string for the filesystem is reported. +command (since v2.31) lists all the offset where a magic strings have been +detected. When option \fB-a\fR is used, all magic strings that are visible for libblkid are erased. In this case the |