This is equivalent to the qemu parameter C<-cdrom filename>.
+Note that this call checks for the existence of C<filename>. This
+stops you from specifying other types of drive which are supported
+by qemu such as C<nbd:> and C<http:> URLs. To specify those, use
+the general C<guestfs_config> call instead.
+
This function returns 0 on success or -1 on error.
=head2 guestfs_add_drive
just want to read the image or write access if you want to modify the
image).
-This is equivalent to the qemu parameter C<-drive file=filename>.
+This is equivalent to the qemu parameter C<-drive file=filename,cache=off>.
+
+Note that this call checks for the existence of C<filename>. This
+stops you from specifying other types of drive which are supported
+by qemu such as C<nbd:> and C<http:> URLs. To specify those, use
+the general C<guestfs_config> call instead.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_add_drive_ro
+
+ int guestfs_add_drive_ro (guestfs_h *handle,
+ const char *filename);
+
+This adds a drive in snapshot mode, making it effectively
+read-only.
+
+Note that writes to the device are allowed, and will be seen for
+the duration of the guestfs handle, but they are written
+to a temporary file which is discarded as soon as the guestfs
+handle is closed. We don't currently have any method to enable
+changes to be committed, although qemu can support this.
+
+This is equivalent to the qemu parameter
+C<-drive file=filename,snapshot=on>.
+
+Note that this call checks for the existence of C<filename>. This
+stops you from specifying other types of drive which are supported
+by qemu such as C<nbd:> and C<http:> URLs. To specify those, use
+the general C<guestfs_config> call instead.
This function returns 0 on success or -1 on error.
The single parameter is an argv-style list of arguments.
The first element is the name of the program to run.
Subsequent elements are parameters. The list must be
-non-empty (ie. must contain a program name).
+non-empty (ie. must contain a program name). Note that
+the command runs directly, and is I<not> invoked via
+the shell (see C<guestfs_sh>).
+
+The return value is anything printed to I<stdout> by
+the command.
+
+If the command returns a non-zero exit status, then
+this function returns an error message. The error message
+string is the content of I<stderr> from the command.
The C<$PATH> environment variable will contain at least
C</usr/bin> and C</bin>. If you require a program from
This function returns a string, or NULL on error.
I<The caller must free the returned string after use>.
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
=head2 guestfs_command_lines
char **guestfs_command_lines (guestfs_h *handle,
This is the same as C<guestfs_command>, but splits the
result into a list of lines.
+See also: C<guestfs_sh_lines>
+
This function returns a NULL-terminated array of strings
(like L<environ(3)>), or NULL if there was an error.
I<The caller must free the strings and the array after use>.
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
=head2 guestfs_config
int guestfs_config (guestfs_h *handle,
This function returns a string, or NULL on error.
I<The caller must free the returned string after use>.
+=head2 guestfs_df
+
+ char *guestfs_df (guestfs_h *handle);
+
+This command runs the C<df> command to report disk space used.
+
+This command is mostly useful for interactive sessions. It
+is I<not> intended that you try to parse the output string.
+Use C<statvfs> from programs.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+=head2 guestfs_df_h
+
+ char *guestfs_df_h (guestfs_h *handle);
+
+This command runs the C<df -h> command to report disk space used
+in human-readable format.
+
+This command is mostly useful for interactive sessions. It
+is I<not> intended that you try to parse the output string.
+Use C<statvfs> from programs.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
=head2 guestfs_dmesg
char *guestfs_dmesg (guestfs_h *handle);
This function returns 0 on success or -1 on error.
+=head2 guestfs_du
+
+ int64_t guestfs_du (guestfs_h *handle,
+ const char *path);
+
+This command runs the C<du -s> command to estimate file space
+usage for C<path>.
+
+C<path> can be a file or a directory. If C<path> is a directory
+then the estimate includes the contents of the directory and all
+subdirectories (recursively).
+
+The result is the estimated size in I<kilobytes>
+(ie. units of 1024 bytes).
+
+On error this function returns -1.
+
+=head2 guestfs_e2fsck_f
+
+ int guestfs_e2fsck_f (guestfs_h *handle,
+ const char *device);
+
+This runs C<e2fsck -p -f device>, ie. runs the ext2/ext3
+filesystem checker on C<device>, noninteractively (C<-p>),
+even if the filesystem appears to be clean (C<-f>).
+
+This command is only needed because of C<guestfs_resize2fs>
+(q.v.). Normally you should use C<guestfs_fsck>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_end_busy
+
+ int guestfs_end_busy (guestfs_h *handle);
+
+This sets the state to C<READY>, or if in C<CONFIG> then it leaves the
+state as is. This is only used when implementing
+actions using the low-level API.
+
+For more information on states, see L<guestfs(3)>.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_equal
int guestfs_equal (guestfs_h *handle,
This function returns a string, or NULL on error.
I<The caller must free the returned string after use>.
+=head2 guestfs_find
+
+ char **guestfs_find (guestfs_h *handle,
+ const char *directory);
+
+This command lists out all files and directories, recursively,
+starting at C<directory>. It is essentially equivalent to
+running the shell command C<find directory -print> but some
+post-processing happens on the output, described below.
+
+This returns a list of strings I<without any prefix>. Thus
+if the directory structure was:
+
+ /tmp/a
+ /tmp/b
+ /tmp/c/d
+
+then the returned list from C<guestfs_find> C</tmp> would be
+4 elements:
+
+ a
+ b
+ c
+ c/d
+
+If C<directory> is not a directory, then this command returns
+an error.
+
+The returned list is sorted.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
=head2 guestfs_fsck
int guestfs_fsck (guestfs_h *handle,
On error this function returns -1.
+=head2 guestfs_get_append
+
+ const char *guestfs_get_append (guestfs_h *handle);
+
+Return the additional kernel options which are added to the
+guest kernel command line.
+
+If C<NULL> then no options are added.
+
+This function returns a string, or NULL on error.
+The string is owned by the guest handle and must I<not> be freed.
+
=head2 guestfs_get_autosync
int guestfs_get_autosync (guestfs_h *handle);
This function returns a string, or NULL on error.
I<The caller must free the returned string after use>.
+=head2 guestfs_get_memsize
+
+ int guestfs_get_memsize (guestfs_h *handle);
+
+This gets the memory size in megabytes allocated to the
+qemu subprocess.
+
+If C<guestfs_set_memsize> was not called
+on this handle, and if C<LIBGUESTFS_MEMSIZE> was not set,
+then this returns the compiled-in default value for memsize.
+
+For more information on the architecture of libguestfs,
+see L<guestfs(3)>.
+
+On error this function returns -1.
+
=head2 guestfs_get_path
const char *guestfs_get_path (guestfs_h *handle);
This function returns a C truth value on success or -1 on error.
+=head2 guestfs_glob_expand
+
+ char **guestfs_glob_expand (guestfs_h *handle,
+ const char *pattern);
+
+This command searches for all the pathnames matching
+C<pattern> according to the wildcard expansion rules
+used by the shell.
+
+If no paths match, then this returns an empty list
+(note: not an error).
+
+It is just a wrapper around the C L<glob(3)> function
+with flags C<GLOB_MARK|GLOB_BRACE>.
+See that manual page for more details.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
=head2 guestfs_grub_install
int guestfs_grub_install (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_head
+
+ char **guestfs_head (guestfs_h *handle,
+ const char *path);
+
+This command returns up to the first 10 lines of a file as
+a list of strings.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
+=head2 guestfs_head_n
+
+ char **guestfs_head_n (guestfs_h *handle,
+ int nrlines,
+ const char *path);
+
+If the parameter C<nrlines> is a positive number, this returns the first
+C<nrlines> lines of the file C<path>.
+
+If the parameter C<nrlines> is a negative number, this returns lines
+from the file C<path>, excluding the last C<nrlines> lines.
+
+If the parameter C<nrlines> is zero, this returns an empty list.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
+=head2 guestfs_hexdump
+
+ char *guestfs_hexdump (guestfs_h *handle,
+ const char *path);
+
+This runs C<hexdump -C> on the given C<path>. The result is
+the human-readable, canonical hex dump of the file.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
+=head2 guestfs_initrd_list
+
+ char **guestfs_initrd_list (guestfs_h *handle,
+ const char *path);
+
+This command lists out files contained in an initrd.
+
+The files are listed without any initial C</> character. The
+files are listed in the order they appear (not necessarily
+alphabetical). Directory names are listed as separate items.
+
+Old Linux kernels (2.4 and earlier) used a compressed ext2
+filesystem as initrd. We I<only> support the newer initramfs
+format (compressed cpio files).
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
=head2 guestfs_is_busy
int guestfs_is_busy (guestfs_h *handle);
This function returns 0 on success or -1 on error.
+=head2 guestfs_lvresize
+
+ int guestfs_lvresize (guestfs_h *handle,
+ const char *device,
+ int mbytes);
+
+This resizes (expands or shrinks) an existing LVM logical
+volume to C<mbytes>. When reducing, data in the reduced part
+is lost.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_lvs
char **guestfs_lvs (guestfs_h *handle);
This function returns 0 on success or -1 on error.
+=head2 guestfs_mkdtemp
+
+ char *guestfs_mkdtemp (guestfs_h *handle,
+ const char *template);
+
+This command creates a temporary directory. The
+C<template> parameter should be a full pathname for the
+temporary directory name with the final six characters being
+"XXXXXX".
+
+For example: "/tmp/myprogXXXXXX" or "/Temp/myprogXXXXXX",
+the second one being suitable for Windows filesystems.
+
+The name of the temporary directory that was created
+is returned.
+
+The temporary directory is created with mode 0700
+and is owned by root.
+
+The caller is responsible for deleting the temporary
+directory and its contents after use.
+
+See also: L<mkdtemp(3)>
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+=head2 guestfs_mkfifo
+
+ int guestfs_mkfifo (guestfs_h *handle,
+ int mode,
+ const char *path);
+
+This call creates a FIFO (named pipe) called C<path> with
+mode C<mode>. It is just a convenient wrapper around
+C<guestfs_mknod>.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_mkfs
int guestfs_mkfs (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_mknod
+
+ int guestfs_mknod (guestfs_h *handle,
+ int mode,
+ int devmajor,
+ int devminor,
+ const char *path);
+
+This call creates block or character special devices, or
+named pipes (FIFOs).
+
+The C<mode> parameter should be the mode, using the standard
+constants. C<devmajor> and C<devminor> are the
+device major and minor numbers, only used when creating block
+and character special devices.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_mknod_b
+
+ int guestfs_mknod_b (guestfs_h *handle,
+ int mode,
+ int devmajor,
+ int devminor,
+ const char *path);
+
+This call creates a block device node called C<path> with
+mode C<mode> and device major/minor C<devmajor> and C<devminor>.
+It is just a convenient wrapper around C<guestfs_mknod>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_mknod_c
+
+ int guestfs_mknod_c (guestfs_h *handle,
+ int mode,
+ int devmajor,
+ int devminor,
+ const char *path);
+
+This call creates a char device node called C<path> with
+mode C<mode> and device major/minor C<devmajor> and C<devminor>.
+It is just a convenient wrapper around C<guestfs_mknod>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_mkswap
+
+ int guestfs_mkswap (guestfs_h *handle,
+ const char *device);
+
+Create a swap partition on C<device>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_mkswap_L
+
+ int guestfs_mkswap_L (guestfs_h *handle,
+ const char *label,
+ const char *device);
+
+Create a swap partition on C<device> with label C<label>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_mkswap_U
+
+ int guestfs_mkswap_U (guestfs_h *handle,
+ const char *uuid,
+ const char *device);
+
+Create a swap partition on C<device> with UUID C<uuid>.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_mount
int guestfs_mount (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_mount_loop
+
+ int guestfs_mount_loop (guestfs_h *handle,
+ const char *file,
+ const char *mountpoint);
+
+This command lets you mount C<file> (a filesystem image
+in a file) on a mount point. It is entirely equivalent to
+the command C<mount -o loop file mountpoint>.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_mount_options
int guestfs_mount_options (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_ntfs_3g_probe
+
+ int guestfs_ntfs_3g_probe (guestfs_h *handle,
+ int rw,
+ const char *device);
+
+This command runs the L<ntfs-3g.probe(8)> command which probes
+an NTFS C<device> for mountability. (Not all NTFS volumes can
+be mounted read-write, and some cannot be mounted at all).
+
+C<rw> is a boolean flag. Set it to true if you want to test
+if the volume can be mounted read-write. Set it to false if
+you want to test if the volume can be mounted read-only.
+
+The return value is an integer which C<0> if the operation
+would succeed, or some non-zero value documented in the
+L<ntfs-3g.probe(8)> manual page.
+
+On error this function returns -1.
+
=head2 guestfs_ping_daemon
int guestfs_ping_daemon (guestfs_h *handle);
This function returns 0 on success or -1 on error.
+=head2 guestfs_pvresize
+
+ int guestfs_pvresize (guestfs_h *handle,
+ const char *device);
+
+This resizes (expands or shrinks) an existing LVM physical
+volume to match the new size of the underlying device.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_pvs
char **guestfs_pvs (guestfs_h *handle);
(like L<environ(3)>), or NULL if there was an error.
I<The caller must free the strings and the array after use>.
+=head2 guestfs_resize2fs
+
+ int guestfs_resize2fs (guestfs_h *handle,
+ const char *device);
+
+This resizes an ext2 or ext3 filesystem to match the size of
+the underlying device.
+
+I<Note:> It is sometimes required that you run C<guestfs_e2fsck_f>
+on the C<device> before calling this command. For unknown reasons
+C<resize2fs> sometimes gives an error about this and sometimes not.
+In any case, it is always safe to call C<guestfs_e2fsck_f> before
+calling this function.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_rm
int guestfs_rm (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_scrub_device
+
+ int guestfs_scrub_device (guestfs_h *handle,
+ const char *device);
+
+This command writes patterns over C<device> to make data retrieval
+more difficult.
+
+It is an interface to the L<scrub(1)> program. See that
+manual page for more details.
+
+This function returns 0 on success or -1 on error.
+
+B<This command is dangerous. Without careful use you
+can easily destroy all your data>.
+
+=head2 guestfs_scrub_file
+
+ int guestfs_scrub_file (guestfs_h *handle,
+ const char *file);
+
+This command writes patterns over a file to make data retrieval
+more difficult.
+
+The file is I<removed> after scrubbing.
+
+It is an interface to the L<scrub(1)> program. See that
+manual page for more details.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_scrub_freespace
+
+ int guestfs_scrub_freespace (guestfs_h *handle,
+ const char *dir);
+
+This command creates the directory C<dir> and then fills it
+with files until the filesystem is full, and scrubs the files
+as for C<guestfs_scrub_file>, and deletes them.
+The intention is to scrub any free space on the partition
+containing C<dir>.
+
+It is an interface to the L<scrub(1)> program. See that
+manual page for more details.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_set_append
+
+ int guestfs_set_append (guestfs_h *handle,
+ const char *append);
+
+This function is used to add additional options to the
+guest kernel command line.
+
+The default is C<NULL> unless overridden by setting
+C<LIBGUESTFS_APPEND> environment variable.
+
+Setting C<append> to C<NULL> means I<no> additional options
+are passed (libguestfs always adds a few of its own).
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_set_autosync
int guestfs_set_autosync (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_set_memsize
+
+ int guestfs_set_memsize (guestfs_h *handle,
+ int memsize);
+
+This sets the memory size in megabytes allocated to the
+qemu subprocess. This only has any effect if called before
+C<guestfs_launch>.
+
+You can also change this by setting the environment
+variable C<LIBGUESTFS_MEMSIZE> before the handle is
+created.
+
+For more information on the architecture of libguestfs,
+see L<guestfs(3)>.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_set_path
int guestfs_set_path (guestfs_h *handle,
The default is C<$libdir/guestfs> unless overridden by setting
C<LIBGUESTFS_PATH> environment variable.
-The string C<path> is stashed in the libguestfs handle, so the caller
-must make sure it remains valid for the lifetime of the handle.
-
Setting C<path> to C<NULL> restores the default path.
This function returns 0 on success or -1 on error.
You can also override this by setting the C<LIBGUESTFS_QEMU>
environment variable.
-The string C<qemu> is stashed in the libguestfs handle, so the caller
-must make sure it remains valid for the lifetime of the handle.
-
Setting C<qemu> to C<NULL> restores the default qemu binary.
This function returns 0 on success or -1 on error.
pass C<lines> as a single element list, when the single element being
the string C<,> (comma).
+See also: C<guestfs_sfdisk_l>, C<guestfs_sfdisk_N>
+
+This function returns 0 on success or -1 on error.
+
+B<This command is dangerous. Without careful use you
+can easily destroy all your data>.
+
+=head2 guestfs_sfdisk_N
+
+ int guestfs_sfdisk_N (guestfs_h *handle,
+ const char *device,
+ int partnum,
+ int cyls,
+ int heads,
+ int sectors,
+ const char *line);
+
+This runs L<sfdisk(8)> option to modify just the single
+partition C<n> (note: C<n> counts from 1).
+
+For other parameters, see C<guestfs_sfdisk>. You should usually
+pass C<0> for the cyls/heads/sectors parameters.
+
This function returns 0 on success or -1 on error.
B<This command is dangerous. Without careful use you
can easily destroy all your data>.
+=head2 guestfs_sfdisk_disk_geometry
+
+ char *guestfs_sfdisk_disk_geometry (guestfs_h *handle,
+ const char *device);
+
+This displays the disk geometry of C<device> read from the
+partition table. Especially in the case where the underlying
+block device has been resized, this can be different from the
+kernel's idea of the geometry (see C<guestfs_sfdisk_kernel_geometry>).
+
+The result is in human-readable format, and not designed to
+be parsed.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+=head2 guestfs_sfdisk_kernel_geometry
+
+ char *guestfs_sfdisk_kernel_geometry (guestfs_h *handle,
+ const char *device);
+
+This displays the kernel's idea of the geometry of C<device>.
+
+The result is in human-readable format, and not designed to
+be parsed.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+=head2 guestfs_sfdisk_l
+
+ char *guestfs_sfdisk_l (guestfs_h *handle,
+ const char *device);
+
+This displays the partition table on C<device>, in the
+human-readable output of the L<sfdisk(8)> command. It is
+not intended to be parsed.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+=head2 guestfs_sh
+
+ char *guestfs_sh (guestfs_h *handle,
+ const char *command);
+
+This call runs a command from the guest filesystem via the
+guest's C</bin/sh>.
+
+This is like C<guestfs_command>, but passes the command to:
+
+ /bin/sh -c "command"
+
+Depending on the guest's shell, this usually results in
+wildcards being expanded, shell expressions being interpolated
+and so on.
+
+All the provisos about C<guestfs_command> apply to this call.
+
+This function returns a string, or NULL on error.
+I<The caller must free the returned string after use>.
+
+=head2 guestfs_sh_lines
+
+ char **guestfs_sh_lines (guestfs_h *handle,
+ const char *command);
+
+This is the same as C<guestfs_sh>, but splits the result
+into a list of lines.
+
+See also: C<guestfs_command_lines>
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+=head2 guestfs_sleep
+
+ int guestfs_sleep (guestfs_h *handle,
+ int secs);
+
+Sleep for C<secs> seconds.
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_stat
struct guestfs_stat *guestfs_stat (guestfs_h *handle,
or NULL if there was an error.
I<The caller must call C<free> after use>.
+=head2 guestfs_strings
+
+ char **guestfs_strings (guestfs_h *handle,
+ const char *path);
+
+This runs the L<strings(1)> command on a file and returns
+the list of printable strings found.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
+=head2 guestfs_strings_e
+
+ char **guestfs_strings_e (guestfs_h *handle,
+ const char *encoding,
+ const char *path);
+
+This is like the C<guestfs_strings> command, but allows you to
+specify the encoding.
+
+See the L<strings(1)> manpage for the full list of encodings.
+
+Commonly useful encodings are C<l> (lower case L) which will
+show strings inside Windows/x86 files.
+
+The returned strings are transcoded to UTF-8.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
=head2 guestfs_sync
int guestfs_sync (guestfs_h *handle);
This function returns 0 on success or -1 on error.
+=head2 guestfs_tail
+
+ char **guestfs_tail (guestfs_h *handle,
+ const char *path);
+
+This command returns up to the last 10 lines of a file as
+a list of strings.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
+=head2 guestfs_tail_n
+
+ char **guestfs_tail_n (guestfs_h *handle,
+ int nrlines,
+ const char *path);
+
+If the parameter C<nrlines> is a positive number, this returns the last
+C<nrlines> lines of the file C<path>.
+
+If the parameter C<nrlines> is a negative number, this returns lines
+from the file C<path>, starting with the C<-nrlines>th line.
+
+If the parameter C<nrlines> is zero, this returns an empty list.
+
+This function returns a NULL-terminated array of strings
+(like L<environ(3)>), or NULL if there was an error.
+I<The caller must free the strings and the array after use>.
+
+Because of the message protocol, there is a transfer limit
+of somewhere between 2MB and 4MB. To transfer large files you should use
+FTP.
+
=head2 guestfs_tar_in
int guestfs_tar_in (guestfs_h *handle,
C<n> keys and values alternate, followed by the trailing NULL entry.
I<The caller must free the strings and the array after use>.
+=head2 guestfs_umask
+
+ int guestfs_umask (guestfs_h *handle,
+ int mask);
+
+This function sets the mask used for creating new files and
+device nodes to C<mask & 0777>.
+
+Typical umask values would be C<022> which creates new files
+with permissions like "-rw-r--r--" or "-rwxr-xr-x", and
+C<002> which creates new files with permissions like
+"-rw-rw-r--" or "-rwxrwxr-x".
+
+See also L<umask(2)>, C<guestfs_mknod>, C<guestfs_mkdir>.
+
+This call returns the previous umask.
+
+On error this function returns -1.
+
=head2 guestfs_umount
int guestfs_umount (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_vg_activate
+
+ int guestfs_vg_activate (guestfs_h *handle,
+ int activate,
+ char * const* const volgroups);
+
+This command activates or (if C<activate> is false) deactivates
+all logical volumes in the listed volume groups C<volgroups>.
+If activated, then they are made known to the
+kernel, ie. they appear as C</dev/mapper> devices. If deactivated,
+then those devices disappear.
+
+This command is the same as running C<vgchange -a y|n volgroups...>
+
+Note that if C<volgroups> is an empty list then B<all> volume groups
+are activated or deactivated.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_vg_activate_all
+
+ int guestfs_vg_activate_all (guestfs_h *handle,
+ int activate);
+
+This command activates or (if C<activate> is false) deactivates
+all logical volumes in all volume groups.
+If activated, then they are made known to the
+kernel, ie. they appear as C</dev/mapper> devices. If deactivated,
+then those devices disappear.
+
+This command is the same as running C<vgchange -a y|n>
+
+This function returns 0 on success or -1 on error.
+
=head2 guestfs_vgcreate
int guestfs_vgcreate (guestfs_h *handle,
This function returns 0 on success or -1 on error.
+=head2 guestfs_wc_c
+
+ int guestfs_wc_c (guestfs_h *handle,
+ const char *path);
+
+This command counts the characters in a file, using the
+C<wc -c> external command.
+
+On error this function returns -1.
+
+=head2 guestfs_wc_l
+
+ int guestfs_wc_l (guestfs_h *handle,
+ const char *path);
+
+This command counts the lines in a file, using the
+C<wc -l> external command.
+
+On error this function returns -1.
+
+=head2 guestfs_wc_w
+
+ int guestfs_wc_w (guestfs_h *handle,
+ const char *path);
+
+This command counts the words in a file, using the
+C<wc -w> external command.
+
+On error this function returns -1.
+
=head2 guestfs_write_file
int guestfs_write_file (guestfs_h *handle,
then the length is calculated using C<strlen> (so in this case
the content cannot contain embedded ASCII NULs).
+I<NB.> Owing to a bug, writing content containing ASCII NUL
+characters does I<not> work, even if the length is specified.
+We hope to resolve this bug in a future version. In the meantime
+use C<guestfs_upload>.
+
This function returns 0 on success or -1 on error.
Because of the message protocol, there is a transfer limit
to securely wipe the device). It should be sufficient to remove
any partition tables, filesystem superblocks and so on.
+See also: C<guestfs_scrub_device>.
+
+This function returns 0 on success or -1 on error.
+
+=head2 guestfs_zerofree
+
+ int guestfs_zerofree (guestfs_h *handle,
+ const char *device);
+
+This runs the I<zerofree> program on C<device>. This program
+claims to zero unused inodes and disk blocks on an ext2/3
+filesystem, thus making it possible to compress the filesystem
+more effectively.
+
+You should B<not> run this program if the filesystem is
+mounted.
+
+It is possible that using this program can damage the filesystem
+or data on the filesystem.
+
This function returns 0 on success or -1 on error.
git.annexia.org / libguestfs.git / blobdiff