+++ /dev/null
-/* This inspects a block device and produces an XML representation of
- * the partitions, LVM, filesystems that we find there. This could be
- * useful as example code of how to do this sort of probing, or to
- * feed the XML to other programs.
- *
- * Usage:
- * to-xml guest.img [guest.img ...]
- */
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <unistd.h>
-#include <ctype.h>
-
-#include <guestfs.h>
-
-/* Note that if any API call fails, we can just exit. The
- * standard error handler will have printed the error message
- * to stderr already.
- */
-#define CALL(call,errcode) \
- if ((call) == (errcode)) exit (EXIT_FAILURE);
-
-static void display_partition (guestfs_h *g, const char *dev);
-static void display_partitions (guestfs_h *g, const char *dev);
-static void display_ext234 (guestfs_h *g, const char *dev, const char *fstype);
-
-int
-main (int argc, char *argv[])
-{
- guestfs_h *g;
- int i;
-
- if (argc < 2 || access (argv[1], F_OK) != 0) {
- fprintf (stderr, "Usage: to-xml guest.img [guest.img ...]\n");
- exit (EXIT_FAILURE);
- }
-
- if (!(g = guestfs_create ())) {
- fprintf (stderr, "Cannot create libguestfs handle.\n");
- exit (EXIT_FAILURE);
- }
-
- for (i = 1; i < argc; ++i)
- CALL (guestfs_add_drive_opts (g, argv[i],
- GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
- -1), -1);
-
- CALL (guestfs_launch (g), -1);
-
- printf ("<guestfs-system>\n");
-
- /* list-devices should return the devices that we just attached?
- * Better to find out what the kernel thinks are devices anyway ...
- */
- char **devices;
- CALL (devices = guestfs_list_devices (g), NULL);
- printf ("<devices>\n");
- for (i = 0; devices[i] != NULL; ++i) {
- int64_t size;
- CALL (size = guestfs_blockdev_getsize64 (g, devices[i]), -1);
- printf ("<device dev=\"%s\" size=\"%" PRIi64 "\">\n", devices[i], size);
- display_partitions (g, devices[i]);
- free (devices[i]);
- printf ("</device>\n");
- }
- free (devices);
- printf ("</devices>\n");
-
- /* Now do the same for VGs and LVs. Note that a VG may span
- * multiple PVs / block devices, in arbitrary ways, which is
- * why VGs are in a separate top-level XML class.
- */
- char **vgs;
- char **lvs;
- printf ("<volgroups>\n");
- CALL (vgs = guestfs_vgs (g), NULL);
- CALL (lvs = guestfs_lvs (g), NULL);
- for (i = 0; vgs[i] != NULL; ++i) {
- printf ("<volgroup name=\"%s\">\n", vgs[i]);
-
- /* Just the LVs in this VG. */
- int len = strlen (vgs[i]);
- int j;
- for (j = 0; lvs[j] != NULL; ++j) {
- if (strncmp (lvs[j], "/dev/", 5) == 0 &&
- strncmp (&lvs[j][5], vgs[i], len) == 0 &&
- lvs[j][len+5] == '/') {
- int64_t size;
- CALL (size = guestfs_blockdev_getsize64 (g, lvs[j]), -1);
- printf ("<logvol name=\"%s\" size=\"%" PRIi64 "\">\n", lvs[j], size);
- display_partition (g, lvs[j]);
- printf ("</logvol>\n");
- free (lvs[j]);
- }
- }
-
- free (vgs[i]);
- printf ("</volgroup>\n");
- }
- free (vgs);
- free (lvs);
- printf ("</volgroups>\n");
-
- guestfs_close (g);
- printf ("</guestfs-system>\n");
-
- return 0;
-}
-
-/* Display a partition or LV. */
-static void
-display_partition (guestfs_h *g, const char *dev)
-{
- char *what;
-
- CALL (what = guestfs_file (g, dev), NULL);
-
- if (strcmp (what, "x86 boot sector") == 0)
- /* This is what 'file' program shows for Windows/NTFS partitions. */
- printf ("<windows/>\n");
- else if (strstr (what, "boot sector") != NULL)
- display_partitions (g, dev);
- else if (strncmp (what, "LVM2", 4) == 0)
- printf ("<physvol/>\n");
- else if (strstr (what, "ext2 filesystem data") != NULL)
- display_ext234 (g, dev, "ext2");
- else if (strstr (what, "ext3 filesystem data") != NULL)
- display_ext234 (g, dev, "ext3");
- else if (strstr (what, "ext4 filesystem data") != NULL)
- display_ext234 (g, dev, "ext4");
- else if (strstr (what, "Linux/i386 swap file") != NULL)
- printf ("<linux-swap/>\n");
- else
- printf ("<unknown/>\n");
-
- free (what);
-}
-
-/* Display an MBR-formatted boot sector. */
-static void
-display_partitions (guestfs_h *g, const char *dev)
-{
- /* We can't look into a boot sector which is an LV or partition.
- * That's a limitation of sorts of the Linux kernel. (Actually,
- * we could do this if we add the kpartx program to libguestfs).
- */
- if (strncmp (dev, "/dev/sd", 7) != 0 || isdigit (dev[strlen(dev)-1])) {
- printf ("<vm-image dev=\"%s\"/>\n", dev);
- return;
- }
-
- char **parts;
- int i, len;
- CALL (parts = guestfs_list_partitions (g), NULL);
- printf ("<partitions>\n");
-
- len = strlen (dev);
- for (i = 0; parts[i] != NULL; ++i) {
- /* Only display partition if it's in the device. */
- if (strncmp (parts[i], dev, len) == 0) {
- int64_t size;
- CALL (size = guestfs_blockdev_getsize64 (g, parts[i]), -1);
- printf ("<partition dev=\"%s\" size=\"%" PRIi64 "\">\n", parts[i], size);
- display_partition (g, parts[i]);
- printf ("</partition>\n");
- }
-
- free (parts[i]);
- }
- free (parts);
- printf ("</partitions>\n");
-}
-
-/* Display some details on the ext2/3/4 filesystem on dev. */
-static void
-display_ext234 (guestfs_h *g, const char *dev, const char *fstype)
-{
- char **sbfields;
- int i;
-
- printf ("<fs type=\"%s\">\n", fstype);
- CALL (sbfields = guestfs_tune2fs_l (g, dev), NULL);
-
- for (i = 0; sbfields[i] != NULL; i += 2) {
- /* Just pick out a few important fields to display. There
- * is much more that could be displayed here.
- */
- if (strcmp (sbfields[i], "Filesystem UUID") == 0)
- printf ("<uuid>%s</uuid>\n", sbfields[i+1]);
- else if (strcmp (sbfields[i], "Block size") == 0)
- printf ("<blocksize>%s</blocksize>\n", sbfields[i+1]);
-
- free (sbfields[i]);
- free (sbfields[i+1]);
- }
- free (sbfields);
-
- printf ("</fs>\n");
-}
git.annexia.org / libguestfs.git / blobdiff