| Commit message (Collapse) | Author | Age | Files | Lines |
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See also:
http://catless.ncl.ac.uk/Risks/26.17.html#subj13.3
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The guestfish-only commands such as 'alloc' and 'edit' are
now generated from one place in the generator instead of being
spread around ad-hoc in the C code.
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The progress bar is updated 3 times per second, and is not displayed
at all for operations which take less than two seconds.
You can disable progress bars by using the flag --no-progress-bars,
and you can enable progress bars in non-interactive sessions with
the flag --progress-bars.
A good way to test this is to use the following command:
guestfish --progress-bars \
-N disk:10G \
zero-device /dev/sda
(adjust "10G" to get different lengths of time).
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Don't shell out to virt-inspector. Instead, use the new C-based
inspection APIs.
This is much faster.
The new syntax is slightly different:
guestfish -a disk.img -i
guestfish -d guest -i
However, the old syntax still works.
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The -d option lets you specify libvirt domains. The disks from
these domains are found and added, as if you'd named them with -a.
The -c option lets you specify a libvirt URI, which is needed
when we consult libvirt to implement the above.
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This adds support for opening LUKS-encrypted disks, via
three new APIs:
luks_open: Create a mapping for an encrypted disk.
luks_open_ro: Same, but read-only mapping.
luks_close: Close a mapping.
A typical guestfish session using this functionality looks
like this:
$ guestfish --ro -a encrypted.img
><fs> run
><fs> list-devices
/dev/vda
><fs> list-partitions
/dev/vda1
/dev/vda2
><fs> vfs-type /dev/vda2
crypto_LUKS
><fs> luks-open /dev/vda2 luksdev
Enter key or passphrase ("key"):
><fs> vgscan
><fs> vg-activate-all true
><fs> pvs
/dev/dm-0
><fs> vgs
vg_f13x64encrypted
><fs> lvs
/dev/vg_f13x64encrypted/lv_root
/dev/vg_f13x64encrypted/lv_swap
><fs> mount /dev/vg_f13x64encrypted/lv_root /
><fs> ll /
total 132
dr-xr-xr-x. 24 root root 4096 Jul 21 12:01 .
dr-xr-xr-x 20 root root 0 Jul 21 20:06 ..
drwx------. 3 root root 4096 Jul 21 11:59 .dbus
drwx------. 2 root root 4096 Jul 21 12:00 .pulse
-rw-------. 1 root root 256 Jul 21 12:00 .pulse-cookie
dr-xr-xr-x. 2 root root 4096 May 13 03:03 bin
NOT included in this patch:
- An easier way to use this from guestfish.
- Ability to create LUKS devices.
- Ability to change LUKS keys on existing devices.
- Direct access to the /dev/mapper device (eg. if it contains
anything apart from VGs).
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Add a 'Key' parameter type, used for passing sensitive key material
into libguestfs.
Eventually the plan is to mlock() key material into memory. However
this is very difficult to achieve because the encoded XDR strings
end up in many places. Therefore users should note that key material
passed to libguestfs might end up in swap.
The only difference between 'Key' and 'String' currently is that
guestfish requests the key from /dev/tty with echoing turned off.
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Follow the example on other manual pages by making the warning
more prominent.
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This checks all available optional groups and prints out which
ones are supported by the daemon. Note you must launch the appliance
first.
Example:
><fs> supported
augeas yes
inotify yes
linuxfsuuid yes
linuxmodules yes
linuxxattrs yes
lvm2 yes
mknod yes
ntfs3g yes
ntfsprogs yes
realpath yes
scrub yes
selinux yes
xz yes
zerofree yes
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This small change uses the gnulib xstrtoll functionality to
enable suffixes on integer parameters in guestfish. For example:
truncate-size /file 1G
(previously you would have had to given the full number).
This also applies to the 'alloc' and 'sparse' commands (and
indirectly to the -N option). The specification for these commands
has changed slightly, in that 'alloc foo 1MB' would now use SI
units, allocating 1000000 bytes instead of a true megabyte. All
existing uses would use 'alloc foo 1M' which still allocates true
megabytes.
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The guestfs_write call can be used to create small files with
arbitrary 8 bit content, including \0 bytes.
This replaces and deprecates write-file, which cannot be modified
to use BufferIn because of an unfortunate choice in the ABI: the
size parameter to write-file, if zero, means that the daemon tries
to calculate the length of the buffer using strlen. However this
fails if we pass a zero-length buffer using BufferIn because then
the daemon tries to do strlen on a (really) zero length buffer, not
even containing a terminating \0 character, thus segfaulting.
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This is more convenient and makes it consistent with the
'alloc' and 'sparse' commands.
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Previously you might have typed:
$ guestfish
><fs> alloc test1.img 100M
><fs> run
><fs> part-disk /dev/sda mbr
><fs> mkfs ext4 /dev/sda1
now you can do the same with:
$ guestfish -N fs:ext4
Some tests have also been updated to use this new
functionality.
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For example:
><fs> upload -<<END /foo
some data
some more data
END
><fs> cat /foo
some data
some more data
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Fix copyright years.
Fix URLs to point to new PRC site.
Make sure guestfish(1) and guestfs(3) manpages reference the
current list of tools.
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Current code uses atoi to parse the generator Int type and
atoll to parse the generator Int64 type. The problem with the
ato* functions is that they don't cope with errors very well,
and they cannot parse numbers that begin with 0.. or 0x..
for octal and hexadecimal respectively.
This replaces the atoi call with a call to Gnulib xstrtol
and the atoll call with a call to Gnulib xstrtoll.
The generated code looks like this for all Int arguments:
{
strtol_error xerr;
long r;
xerr = xstrtol (argv[0], NULL, 0, &r, "");
if (xerr != LONGINT_OK) {
fprintf (stderr,
_("%s: %s: invalid integer parameter (%s returned %d)\n"),
cmd, "memsize", "xstrtol", xerr);
return -1;
}
/* The Int type in the generator is a signed 31 bit int. */
if (r < (-(2LL<<30)) || r > ((2LL<<30)-1)) {
fprintf (stderr, _("%s: %s: integer out of range\n"), cmd, "memsize");
return -1;
}
/* The check above should ensure this assignment does not overflow. */
memsize = r;
}
and like this for all Int64 arguments (note we don't need the
range check for these):
{
strtol_error xerr;
long long r;
xerr = xstrtoll (argv[1], NULL, 0, &r, "");
if (xerr != LONGINT_OK) {
fprintf (stderr,
_("%s: %s: invalid integer parameter (%s returned %d)\n"),
cmd, "size", "xstrtoll", xerr);
return -1;
}
size = r;
}
Note this also fixes an unrelated bug in guestfish handling of
RBufferOut. We were using 'fwrite' without checking the return
value, and this could have caused silent failures, eg. in the case
where there was not enough disk space to store the resulting file,
or even if the program was interrupted (but continued) during the
write.
Replace this with Gnulib 'full-write', and check the return value
and report errors.
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These manual pages have for a very long time 'lived' in the top
source directory.
Clean up this situation by moving those manual pages (plus associated
generated files) into the src/ and fish/ subdirectories respectively.
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