diff options
Diffstat (limited to 'examples/to-xml.c')
| -rw-r--r-- | examples/to-xml.c | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/examples/to-xml.c b/examples/to-xml.c deleted file mode 100644 index 45994cb3..00000000 --- a/examples/to-xml.c +++ /dev/null @@ -1,206 +0,0 @@ -/* 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"); -} |