In other words, the output is not guaranteed by the ABI.
See also: L<file(1)>, C<guestfs_vfs_type>, C<guestfs_lstat>,
-C<guestfs_is_file>, C<guestfs_is_blockdev> (etc).");
+C<guestfs_is_file>, C<guestfs_is_blockdev> (etc), C<guestfs_is_zero>.");
("command", (RString "output", [StringList "arguments"], []), 50, [ProtocolLimitWarning],
[InitScratchFS, Always, TestOutput (
This command is entirely equivalent to running C<fsck -a -t fstype device>.");
("zero", (RErr, [Device "device"], []), 85, [Progress],
- [InitBasicFS, Always, TestOutput (
+ [InitBasicFS, Always, TestRun (
[["umount"; "/dev/sda1"];
- ["zero"; "/dev/sda1"];
- ["file"; "/dev/sda1"]], "data")],
+ ["zero"; "/dev/sda1"]])],
"write zeroes to the device",
"\
This command writes zeroes over the first few blocks of C<device>.
to securely wipe the device). It should be sufficient to remove
any partition tables, filesystem superblocks and so on.
-See also: C<guestfs_zero_device>, C<guestfs_scrub_device>.");
+See also: C<guestfs_zero_device>, C<guestfs_scrub_device>,
+C<guestfs_is_zero_device>");
("grub_install", (RErr, [Pathname "root"; Device "device"], []), 86, [],
(* See:
control whether or not this operation is performed when the
handle is closed.");
+ ("is_zero", (RBool "zeroflag", [Pathname "path"], []), 283, [],
+ [InitISOFS, Always, TestOutputTrue (
+ [["is_zero"; "/100kallzeroes"]]);
+ InitISOFS, Always, TestOutputFalse (
+ [["is_zero"; "/100kallspaces"]])],
+ "test if a file contains all zero bytes",
+ "\
+This returns true iff the file exists and the file is empty or
+it contains all zero bytes.");
+
+ ("is_zero_device", (RBool "zeroflag", [Device "device"], []), 284, [],
+ [InitBasicFS, Always, TestOutputTrue (
+ [["umount"; "/dev/sda1"];
+ ["zero_device"; "/dev/sda1"];
+ ["is_zero_device"; "/dev/sda1"]]);
+ InitBasicFS, Always, TestOutputFalse (
+ [["is_zero_device"; "/dev/sda1"]])],
+ "test if a device contains all zero bytes",
+ "\
+This returns true iff the device exists and contains all zero bytes.
+
+Note that for large devices this can take a long time to run.");
+
]
let all_functions = non_daemon_functions @ daemon_functions