X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=perl%2Flib%2FSys%2FGuestfs.pm;h=7331053e23eee39b9f8e29d925b86fac21bc8df5;hp=5b87b27e80744e198ca3e0351bde5f495093d6ef;hb=f47dafd23186938a22d41739d9bc695c7760b912;hpb=0703248d233744047515418893dac05ce013a642
diff --git a/perl/lib/Sys/Guestfs.pm b/perl/lib/Sys/Guestfs.pm
index 5b87b27..7331053 100644
--- a/perl/lib/Sys/Guestfs.pm
+++ b/perl/lib/Sys/Guestfs.pm
@@ -432,6 +432,16 @@ The first character of C string must be a C<-> (dash).
C can be NULL.
+=item $h->cp ($src, $dest);
+
+This copies a file from C to C where C is
+either a destination filename or destination directory.
+
+=item $h->cp_a ($src, $dest);
+
+This copies a file or directory from C to C
+recursively using the C command.
+
=item $result = $h->debug ($subcmd, \@extraargs);
The C<$h-Edebug> command exposes some internals of
@@ -442,6 +452,17 @@ There is no comprehensive help for this command. You have
to look at the file C in the libguestfs source
to find out what you can do.
+=item $kmsgs = $h->dmesg ();
+
+This returns the kernel messages (C output) from
+the guest kernel. This is sometimes useful for extended
+debugging of problems.
+
+Another way to get the same information is to enable
+verbose messages with C<$h-Eset_verbose> or by setting
+the environment variable C before
+running the program.
+
=item $h->download ($remotefilename, $filename);
Download file C and save it as C
@@ -451,6 +472,25 @@ C can also be a named pipe.
See also C<$h-Eupload>, C<$h-Ecat>.
+=item $h->drop_caches ($whattodrop);
+
+This instructs the guest kernel to drop its page cache,
+and/or dentries and inode caches. The parameter C
+tells the kernel what precisely to drop, see
+L
+
+Setting C to 3 should drop everything.
+
+This automatically calls L before the operation,
+so that the maximum guest memory is freed.
+
+=item $equality = $h->equal ($file1, $file2);
+
+This compares the two files C and C and returns
+true if their content is exactly equal, or false otherwise.
+
+The external L program is used for the comparison.
+
=item $existsflag = $h->exists ($path);
This returns C if and only if there is a file, directory
@@ -474,13 +514,30 @@ This runs the filesystem checker (fsck) on C which
should have filesystem type C.
The returned integer is the status. See L for the
-list of status codes from C, and note that multiple
-status codes can be summed together.
+list of status codes from C.
+
+Notes:
+
+=over 4
-It is entirely equivalent to running C.
-Note that checking or repairing NTFS volumes is not supported
+=item *
+
+Multiple status codes can be summed together.
+
+=item *
+
+A non-zero return code can mean "success", for example if
+errors have been corrected on the filesystem.
+
+=item *
+
+Checking or repairing NTFS volumes is not supported
(by linux-ntfs).
+=back
+
+This command is entirely equivalent to running C.
+
=item $autosync = $h->get_autosync ();
Get the autosync flag.
@@ -520,6 +577,11 @@ For more information on states, see L.
This returns the verbose messages flag.
+=item $h->grub_install ($root, $device);
+
+This command installs GRUB (the Grand Unified Bootloader) on
+C, with the root directory being C.
+
=item $busy = $h->is_busy ();
This returns true iff this handle is busy processing a command
@@ -712,6 +774,18 @@ the list of devices (eg. C, C).
Some internal mounts are not shown.
+=item $h->mv ($src, $dest);
+
+This moves a file from C to C where C is
+either a destination filename or destination directory.
+
+=item $h->ping_daemon ();
+
+This is a test probe into the guestfs daemon running inside
+the qemu subprocess. Calling this function checks that the
+daemon responds to the ping message, without affecting the daemon
+or attached block device(s) in any other way.
+
=item $h->pvcreate ($device);
This creates an LVM physical volume on the named C,
@@ -1006,6 +1080,14 @@ Because of the message protocol, there is a transfer limit
of somewhere between 2MB and 4MB. To transfer large files you should use
FTP.
+=item $h->zero ($device);
+
+This command writes zeroes over the first few blocks of C.
+
+How many blocks are zeroed isn't specified (but it's I enough
+to securely wipe the device). It should be sufficient to remove
+any partition tables, filesystem superblocks and so on.
+
=cut
1;