--- name: "guestfs-release-notes-1.32" section: "1" platform: "linux" package: "libguestfs" version: "1.60.1-2" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/guestfs-release-notes-1.32" --- # guestfs-release-notes-1.32(1) libguestfs Release Notes ## NAME guestfs-release-notes - libguestfs Release Notes ## RELEASE NOTES FOR LIBGUESTFS 1.32 These release notes only cover the differences from the previous stable/dev branch split (1.30.0). For detailed changelogs, please see the git repository, or the ChangeLog file distributed in the tarball. ### New features *New tools* The new [**virt-v2v-copy-to-local**(1)](/virt-v2v-copy-to-local/1.md) tool is an ancillary tool for [**virt-v2v**(1)](/virt-v2v/1.md) allowing you to convert source guests that virt-v2v is unable to access directly. *New features in existing tools* Virt-customize knows how to write a random seed to CirrOS (Pino Toscano). On Fedora, virt-customize runs [**dnf**(8)](/dnf/8.md) with the *--best* flag, ensuring it always updates to the latest available packages. Virt-builder now provides 32 bit Fedora templates. Virt-builder and virt-customize *--install* option now works on 32 bit Fedora guests. Previously it would try to install 64 bit packages (Jan Sedlák). Virt-builder can now fetch cloud images using Simple Streams v1.0 metadata (Pino Toscano). Virt-builder can now fetch openSUSE cloud images out of the box (Cédric Bosdonnat). Virt-customize will now use stronger (SHA-512) encrypted passwords by default on openSUSE ≥ 11 (Pino Toscano). Virt-builder will now correctly handle output filenames containing colon characters (`":"`), and will create temporary files in the libguestfs cache directory instead of defaulting to */tmp* (Pino Toscano). Virt-resize has a new *--unknown-filesystems* option to control what to do when asked to resize a filesystem that libguestfs doesn't know how to resize. Virt-v2v now has an *--in-place* flag/mode, allowing in-place conversion of guests (Roman Kagan). Virt-v2v has a *--compressed* option for creating compressed qcow2 output files. Virt-v2v can now correctly get the VMware datacenter path (dcPath) from libvirt, instead of having to calculate it using an algorithm that occasionally got the wrong answer (Matthias Bolte, Tingting Zheng). Virt-v2v now processes RAM sizes correctly for 64 bit guests when running on a 32 bit host. *Language bindings* In Perl and Python programs, the `"get_program_name"` API now returns the true program name, instead of the incorrect string `"perl"` or `"python"`. The Python bindings can now be compiled against a different version of libguestfs, allowing the pip module to be built against any version of libguestfs (instead of requiring the pip module and libguestfs to have exactly the same version). The quality of the Ruby rdoc (documentation) has been improved (Pino Toscano). Perl scripts no longer hard-code the location of perl in the shebang line, but use [**env**(1)](/env/1.md) to locate it instead (Pino Toscano). In OCaml programs, the guestfs handle was incorrectly made into a global root, meaning it could never be garbage collected. If you didn't call the `"close"` function explicitly, the handle would not be closed until the whole program exited. This has now been fixed so handles will be garbage collected in the usual way. This changes the API of the OCaml function `"Guestfs.event_callback"`. Note that non-C language bindings are not covered by the libguestfs API/ABI guarantee, although we try hard not to change them, but in this case it was essential in order to fix this very serious bug. *Inspection* Alpine Linux and the APK package manager, ALT Linux, Frugalware, and PLD Linux are now recognized (Pino Toscano). If it exists, */etc/os-release* will be preferred for inspecting Linux guests (Pino Toscano). The correct kernel version is returned for Windows guests ≥ 10. *Documentation* The large [**guestfs**(3)](/guestfs/3.md) man page has been split into several separate man pages: [**guestfs-hacking**(1)](/guestfs-hacking/1.md) [**guestfs-internals**(1)](/guestfs-internals/1.md) [**guestfs-security**(1)](/guestfs-security/1.md). In the source tree, a new *docs* directory contains this documentation. *Architectures and platforms* Libguestfs now supports ARM 64 bit platforms with vGICv3. ### Security See also [**guestfs-security**(1)](/guestfs-security/1.md). - "CVE-2015-5745" https://bugzilla.redhat.com/1251157 This is not a vulnerability in libguestfs, but because we always give a virtio-serial port to each guest (since that is how guest-host communication happens), an escalation from the appliance to the host qemu process is possible. This could affect you if: - • your libguestfs program runs untrusted programs out of the guest (using "guestfs\_sh" etc), or - • another exploit was found in (for example) kernel filesystem code that allowed a malformed filesystem to take over the appliance. If you use sVirt to confine qemu, that would thwart some attacks. - Virt-customize permissions on *.ssh*, *.ssh/authorized\_keys* https://bugzilla.redhat.com/1260778. Previously when asked to inject an SSH key into a guest, virt-customize (hence virt-builder too) would create the *.ssh* directory and *.ssh/authorized\_keys* file with too broad permissions, allowing other users to read. They are now created as `0700` and `0600` respectively, which is the same as the [**ssh-copy-id**(1)](/ssh-copy-id/1.md) utility. ### API *New APIs* - "guestfs\_get\_identifier" - "guestfs\_set\_identifier" Get/set a per-handle identifier. The main effect of this is to change trace output from: ``` libguestfs: trace: foo ``` to: ``` libguestfs: trace: ID: foo ``` making it easier to follow traces in multi-threaded programs, or where a program uses multiple handles (especially virt-v2v). - "guestfs\_vfs\_minimum\_size" Return the minimum size of a filesystem (when shrunk). This supports ext2/3/4, XFS and btrfs, and can support other filesystem types in future (Maxim Perevedentsev). *Other API changes* - "guestfs\_disk\_create": add "preallocation" = "off"/"metadata"/"full". For raw, this allows `"off"` as a synonym for `"sparse"` (making it consistent with qcow2). For qcow2, this allows `"sparse"` as a synonym for `"off"`. It also adds `"full"`, which corresponds to fully allocated, but uses [**posix\_fallocate**(3)](/posix_fallocate/3.md) for efficiency. - "guestfs\_tar\_in": new "xattrs", "selinux", "acl" parameters. - "guestfs\_tar\_out": new "xattrs", "selinux", "acl" parameters. These extra parameters control whether extended attributes, SELinux contexts and/or POSIX ACLs are restored from / saved to tarballs. - "guestfs\_add\_drive" The existing `"username"` and `"secret"` parameters can be used to supply authentication for iSCSI (Pino Toscano). ### Build changes The `"./configure --enable-valgrind-daemon"` option has been removed. You can no longer build libguestfs on RHEL 5-era (c.2007) machines. See the `"oldlinux"` branch if you need (limited) RHEL 5 support. Virt-p2v can now be built on RHEL 6-era (c.2010) Linux distros. OCaml ≥ 3.11 (released in 2008) is now required to build from git. Building the Perl bindings now requires `"Module::Build"` (instead of `"ExtUtils::MakeMaker"`). Builds should be faster (especially when incrementally rebuilding), because work was done to reduce build times. Both OCaml and the OCaml findlib module are required if you need to run the generator at build time. Previously the build would have failed if findlib was not installed. `"make check"` tests now run in parallel (within each test directory). `"make install"` no longer installs OCaml *bindtests.\** files incorrectly. `"make install"` can now be run twice. Previously it would fail on the second run. `"make clean"` should now remove nearly every file that `"make"` creates. A new `"make installcheck"` rule has been added, allowing the installed copy of libguestfs to be tested. ### Internals Some effort was put into minimizing the size of the appliance, which reduces temporary disk space and time needed by libguestfs handles. The appliance now passes the NIC name to dhcpd, fixing hangs when running the appliance on some distros (Cédric Bosdonnat). OCaml `"Guestfs.Errno"` is now generated (Pino Toscano). In OCaml tools, common code now handles *--debug-gc*, *--verbose* and other common options (Roman Kagan, Pino Toscano). The virt-v2v test harness allows us to boot the test guests at fixed dates in the past, ensuring that Windows reactivation doesn't kick in. There is a new internal API for reading/writing a subprocess via a pipe from library code. Used `"deheader"` program to remove unused `"#include"` directives. In OCaml tools, the `"Char"` and `"String"` modules now implicitly reference the `"Common_utils.Char"` and `"Common_utils.String"` modules (instead of the ones from stdlib). The `"Common_utils"` modules contain a number of extra char/string utility functions, and also hide some unsafe functions in stdlib. Many more virt-v2v tests will now be run even if you don't have rhsrvany and virtio-win installed (Roman Kagan). The huge *configure.ac* file has been split into several smaller files called *m4/guestfs\_\*.m4*. The old *tests/data* and *tests/guests* directories have been moved to *test-data/*. This new top level directory carries all test data which is common, large and/or shared between multiple tests. There is a new top level *website/* directory containing the public http://libguestfs.org website (or most of it). The fuzz testing of inspection (*tests/fuzz*) has been removed. Virt-p2v now saves the source physical machine dmesg output into the conversion server debug directory, making it simpler to debug cases of missing drivers, firmware etc. ### Bugs fixed - https://bugzilla.redhat.com/1294956 set-label returns wrong error message when set the ext3/ext4 filesystem label - https://bugzilla.redhat.com/1288733 Add a Fedora 23 32-bit base image for virt-builder - https://bugzilla.redhat.com/1288201 virt-builder writes temporary files to /tmp - https://bugzilla.redhat.com/1285847 virt-resize does not copy logical partitions - https://bugzilla.redhat.com/1281578 virt-inspector returns version 6.3 for win10 images (should return 10.0) - https://bugzilla.redhat.com/1281577 virt-inspector --xpath segfault on attribute get - https://bugzilla.redhat.com/1280029 libguestfs can run commands with stdin not open (or worse still, connected to arbitrary guest-chosen random devices) - https://bugzilla.redhat.com/1279273 About compression option for qcow2 - https://bugzilla.redhat.com/1278878 guestfish should be able to handle LVM thin layouts - https://bugzilla.redhat.com/1278382 DNF python programming error when run from virt-builder - https://bugzilla.redhat.com/1278371 inspection returns arch="unknown" for Windows guest if file command is not installed - https://bugzilla.redhat.com/1277274 Document permissions needed for non-admin users to use virt-v2v - https://bugzilla.redhat.com/1277122 RFE: virt-sparsify: make '--in-place' sparsification safe to abort (gracefully or ungracefully) - https://bugzilla.redhat.com/1277074 Virt-p2v client shouldn't present the vdsm option because it's not usable - https://bugzilla.redhat.com/1276540 virt-v2v fails to convert Windows raw image: error "device name is not a partition" - https://bugzilla.redhat.com/1275806 virt-builder: error: \[file\] is not a regular file in the guest - https://bugzilla.redhat.com/1270011 Simplestreams test fails: virt-builder: error: the value for the key 'size' is not an integer - https://bugzilla.redhat.com/1267032 guestfish copy-in command behaves oddly/unexpectedly with wildcards - https://bugzilla.redhat.com/1262983 python: Cannot compile pip module if installed libguestfs != pip guestfs version - https://bugzilla.redhat.com/1262127 Better diagnostic message when virbr0 doesn't exist - https://bugzilla.redhat.com/1261436 No warning shows when convert a win7 guest with AVG AntiVirus installed - https://bugzilla.redhat.com/1260778 virt-builder --ssh-inject doesn't set proper permissions on created files - https://bugzilla.redhat.com/1260689 RFE: V2V to check and warn user to disable group policy and anti virus on Windows guests - https://bugzilla.redhat.com/1260590 Wrong graphics protocol and video type set for guest after convert to rhev 3.6 by virt-v2v - https://bugzilla.redhat.com/1258342 extra slashes in vcenter URL confuses virt-v2v - https://bugzilla.redhat.com/1257895 \[RHEV\]\[V2V\] virt-v2v ignores NIC if interface source/@network or source/@bridge is an empty string - https://bugzilla.redhat.com/1256405 virt-builder created Fedora 22 32bit disk image cannot be updated - https://bugzilla.redhat.com/1256222 virt-p2v no GUI mode:error opening control connection to `$ip:22:unexpected` …rompt - https://bugzilla.redhat.com/1251909 Option -oa preallocated -of qcow2 of virt-v2v didn't work efficiently - https://bugzilla.redhat.com/1250715 v2v: spaces need to be escaped as `%20` in paths - https://bugzilla.redhat.com/1248678 Close all incoming ports on virt-p2v ISO - https://bugzilla.redhat.com/1246882 man virt-customize shows synopsis twice - https://bugzilla.redhat.com/1242853 mount-loop failed to setup loop device: No such file or directory - https://bugzilla.redhat.com/1237136 BUG: unable to handle kernel NULL pointer dereference at \ in function \_\_blkg\_lookup - https://bugzilla.redhat.com/1230412 virt-v2v should ignore bogus kernel entries in grub config - https://bugzilla.redhat.com/1229119 Unrelated info in fstab makes virt-v2v fail with unclear error info - https://bugzilla.redhat.com/1227609 virt-p2v: Using "Back" button causes output list to be repopulated multiple times - https://bugzilla.redhat.com/1225789 Wrong video driver is installed for rhel5.11 guest after conversion to libvirt - https://bugzilla.redhat.com/1204131 RFE: virt-builder creates qcow v3 images, add build option for qcow v2 - https://bugzilla.redhat.com/1176801 File /etc/sysconfig/kernel isn't updated when convert XenPV guest with regular kernel installed - https://bugzilla.redhat.com/1174551 "lstatnslist" and "lstatlist" don't give an error if the API is used wrongly - https://bugzilla.redhat.com/1168223 koji spin-livecd cannot build a working live CD - https://bugzilla.redhat.com/1165785 mount-loop command fails: mount failed: Unknown error -1 - https://bugzilla.redhat.com/1164708 set-label can only set \<=127 bytes for btrfs and \<=126 bytes for ntfs filesystem which not meet the help message. Also for ntfs it should give a warning message when the length \>128 bytes - https://bugzilla.redhat.com/1020216 libvirt fails to shut down domain: could not destroy libvirt domain: Requested operation is not valid: domain is not running - https://bugzilla.redhat.com/1011907 mount-loop failed to setup loop device: No such file or directory ## SEE ALSO **guestfs-examples**(1), [**guestfs-faq**(1)](/guestfs-faq/1.md), [**guestfs-performance**(1)](/guestfs-performance/1.md), [**guestfs-recipes**(1)](/guestfs-recipes/1.md), [**guestfs-testing**(1)](/guestfs-testing/1.md), [**guestfs**(3)](/guestfs/3.md), [**guestfish**(1)](/guestfish/1.md), http://libguestfs.org/ ## AUTHOR Richard W.M. Jones ## COPYRIGHT Copyright (C) 2009-2025 Red Hat Inc. ## LICENSE This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. ## BUGS To get a list of bugs against libguestfs, use this link: https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools To report a new bug against libguestfs, use this link: https://bugzilla.redhat.com/enter\_bug.cgi?component=libguestfs&product=Virtualization+Tools When reporting a bug, please supply: - • The version of libguestfs. - • Where you got libguestfs (eg. which Linux distro, compiled from source, etc) - • Describe the bug accurately and give a way to reproduce it. - • Run [**libguestfs-test-tool**(1)](/libguestfs-test-tool/1.md) and paste the **complete, unedited** output into the bug report.