search for: guestfs_cat

.../using-rsync-with-libguestfs/ We are trying to get the libguestfs API guestfs_rsync_out to work. We’ve tried combinations similar to: guestfs_rsync_out(g, “/HostShared”, “rsync://root@10.0.1.90:2999/backup/ -av”, -1) surrounding it with APIs as in the recipe examples, for example replacing libguestfs_cat(), with no luck. In the above example the "backup" rsync module name matches the script on Richard's wordpress.com blog page (above link). Typically in the rsync daemon log we see something like: receiving file list sent 17 bytes received 24 bytes total size 0 but no data is tr...

...est and use a regular network backup. We don't need to use rsync. We know which files will change. For example even if we do this (error checking removed): while (1) { guestfs_mount_options(g, "sync", "/dev/sda2", "/"); printf("%s\n", guestfs_cat(g, "/HostShared/temp.txt")); guestfs_umount(g, "/"); guestfs_fsync(g); usleep(1000*1000); } temp.txt from the Win7 guest is copied correctly the first time, but afterwards any change we make to it (e.g. using Win7 Notepad) is never seen. That's the...

...t the libguestfs API guestfs_rsync_out to work. We’ve tried combinations similar to: >>> >>> guestfs_rsync_out(g, “/HostShared”, “rsync://root@10.0.1.90:2999/backup/ -av”, -1) >>> >>> surrounding it with APIs as in the recipe examples, for example replacing libguestfs_cat(), with no luck. In the >>> above >>> example the "backup" rsync module name matches the script on Richard's wordpress.com blog page (above link). >>> Typically in the rsync daemon log we see something like: >>> >>> receiving file list &g...

...use rsync. We know which files will change. For example even if we do this (error checking >> removed): >> >> while (1) { >> >> guestfs_mount_options(g, "sync", "/dev/sda2", "/"); >> >> printf("%s\n", guestfs_cat(g, "/HostShared/temp.txt")); >> >> guestfs_umount(g, "/"); >> >> guestfs_fsync(g); >> >> usleep(1000*1000); >> } >> >> temp.txt from the Win7 guest is copied correctly the first time, but >> afterwa...

Currently guestfish has mount-vfs, and the libguestfs API has guestfs_mount_vfs(), but guestmount doesn't allow the user to specify a filesystem. This patch extends the --mount argument, so you can force an ext2 partition to mount as ext4: guestmount -a mydisk.img -m /dev/vda:/:defaults:ext4 mountpoint You could also use it to choose between ntfs and ntfs-3g, or between hfsplus and the

...> > We are trying to get the libguestfs API guestfs_rsync_out to work. We’ve tried combinations similar to: > > guestfs_rsync_out(g, “/HostShared”, “rsync://root@10.0.1.90:2999/backup/ -av”, -1) > > surrounding it with APIs as in the recipe examples, for example replacing libguestfs_cat(), with no luck. In the above > example the "backup" rsync module name matches the script on Richard's wordpress.com blog page (above link). > Typically in the rsync daemon log we see something like: > > receiving file list > sent 17 bytes received 24 bytes total...

...h just runs vmlinux > as a userspace process) you'll experience approximately the same > overhead. Ok got it. Thanks again for your reply. We tried guestfs_drop_caches() as follows: while(1) { guestfs_mount(g, "/dev/sda2", "/"); printf("%s\n", guestfs_cat(g, "/HostShared/temp.txt")); guestfs_umount(g, "/"); guestfs_drop_caches(g, 3); usleep(1000*1000); } and still we cannot see changes made to temp.txt (from inside the Win7 guest VM) while this loop continues to run on the host Linux. We still have to re-laun...

...t; > We don't need to use rsync. We know which files will change. For example even if we do this (error checking removed): > > while (1) { > > guestfs_mount_options(g, "sync", "/dev/sda2", "/"); > > printf("%s\n", guestfs_cat(g, "/HostShared/temp.txt")); > > guestfs_umount(g, "/"); > > guestfs_fsync(g); > > usleep(1000*1000); > } > > temp.txt from the Win7 guest is copied correctly the first time, but > afterwards any change we make to it (e.g. us...

The existing mechanism was clunky, slow and used ~ 10 MB of local disk. Rich.

...kend (which just runs vmlinux as a userspace process) you'll experience approximately the same overhead. Ok got it. Thanks again for your reply. We tried guestfs_drop_caches() as follows: while(1) { guestfs_mount(g, "/dev/sda2", "/"); printf("%s\n", guestfs_cat(g, "/HostShared/temp.txt")); guestfs_umount(g, "/"); guestfs_drop_caches(g, 3); usleep(1000*1000); } and still we cannot see changes made to temp.txt (from inside the Win7 guest VM) while this loop continues to run on the host Linux. We still have to re-launch...

...(guestfs_launch (g) == -1) - exit (EXIT_FAILURE); - - /* Because we're using the partition filter, the device should - * appear to be a filesystem directly on a whole disk. - */ - if (guestfs_mount_ro (g, "/dev/sda", "/") == -1) - exit (EXIT_FAILURE); - - data = guestfs_cat (g, "/hello.txt"); - if (!data) - exit (EXIT_FAILURE); - - if (strcmp (data, "hello,world") != 0) { - fprintf (stderr, - "%s FAILED: unexpected content of /hello.txt file " - "(actual: %s, expected: \"hello,world\")\n&quot...

...(guestfs_launch (g) == -1) - exit (EXIT_FAILURE); - - /* Because we're using the partition filter, the device should - * appear to be a filesystem directly on a whole disk. - */ - if (guestfs_mount_ro (g, "/dev/sda", "/") == -1) - exit (EXIT_FAILURE); - - data = guestfs_cat (g, "/hello.txt"); - if (!data) - exit (EXIT_FAILURE); - - if (strcmp (data, "hello,world") != 0) { - fprintf (stderr, - "%s FAILED: unexpected content of /hello.txt file " - "(actual: %s, expected: \"hello,world\")\n&quot...

In libguestfs we have a few tests that require root privileges and they are skipped by default (normally you should not build or test as root), but you can do this to run them: sudo make check-root In nbdkit I wanted to check that the file plugin works with block devices (this is not tested), and the only way I can sensibly think to do this is using a loopback device and root. This commit

...tthew Booth). Hivex (Windows Registry editing) is now directly supported through the API, making reading or editing the Windows Registry much more efficient. Several libguestfs APIs were reimplemented so they no longer have any limits on output. The reimplemented APIs are: guestfs_cat, guestfs_find, guestfs_read_file, guestfs_read_lines, guestfs_write, guestfs_write_append, guestfs_lstatlist, guestfs_lxattrlist, guestfs_readlinklist, guestfs_ls. virt tools guestfish touch 'win:c:\new_file' now works as expected. guestfish has a new --network opti...

Simpler, and including tests. Rich.

There is a small test provided. I tested this a lot more locally and it seems pretty robust. Rich.

I think this addresses everything in Eric's v2 review. Note that the first patch is best viewed using ‘-w’ to ignore whitespaces changes. Rich.

...LL, *actual = NULL; + + if (asprintf (&file, "/mp%zu/disk%zu", i, i) == -1) + error (EXIT_FAILURE, errno, "asprintf"); + if (asprintf (&expected, "This is disk %zu.", i) == -1) + error (EXIT_FAILURE, errno, "asprintf"); + + actual = guestfs_cat (g, file); + if (actual == NULL) + exit (EXIT_FAILURE); + + if (STRNEQ (expected, actual)) { + fprintf (stderr, + "%s: unexpected content in file %s: " + "expected \"%s\", actual \"%s\"\n", + getprogna...

This implements support for MBR logical partitions in nbdkit-partition-filter, complementing existing support in the partitioning plugin. Rich.

This is a revised version of the two series previously posted here: https://www.redhat.com/archives/libguestfs/2019-January/msg00137.html https://www.redhat.com/archives/libguestfs/2019-January/msg00139.html There have been many smaller changes but the highlights are: - Using SECTOR_SIZE instead of hard-coding 512 everywhere. - Additional safety checks that the EBR chain doesn't jump