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https://github.com/libguestfs/libguestfs.git
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7486fc6f43
By using the once_had_no_optargs flag, this change is backwards compatible for callers (except Haskell, PHP and GObject as discussed in earlier commit).
63 lines
1.6 KiB
Python
63 lines
1.6 KiB
Python
# Example showing how to create a disk image.
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import os
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import guestfs
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output = "disk.img"
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g = guestfs.GuestFS ()
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# Create a raw-format sparse disk image, 512 MB in size.
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f = open (output, "w")
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f.truncate (512 * 1024 * 1024)
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f.close ()
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# Set the trace flag so that we can see each libguestfs call.
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g.set_trace (1)
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# Attach the disk image to libguestfs.
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g.add_drive (output, format = "raw", readonly = 0)
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# Run the libguestfs back-end.
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g.launch ()
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# Get the list of devices. Because we only added one drive
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# above, we expect that this list should contain a single
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# element.
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devices = g.list_devices ()
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assert (len (devices) == 1)
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# Partition the disk as one single MBR partition.
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g.part_disk (devices[0], "mbr")
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# Get the list of partitions. We expect a single element, which
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# is the partition we have just created.
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partitions = g.list_partitions ()
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assert (len (partitions) == 1)
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# Create a filesystem on the partition.
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g.mkfs ("ext4", partitions[0])
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# Now mount the filesystem so that we can add files.
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g.mount_options ("", partitions[0], "/")
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# Create some files and directories.
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g.touch ("/empty")
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message = "Hello, world\n"
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g.write ("/hello", message)
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g.mkdir ("/foo")
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# This one uploads the local file /etc/resolv.conf into
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# the disk image.
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g.upload ("/etc/resolv.conf", "/foo/resolv.conf")
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# Because we wrote to the disk and we want to detect write
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# errors, call g.shutdown. You don't need to do this:
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# g.close will do it implicitly.
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g.shutdown ()
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# Note also that handles are automatically closed if they are
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# reaped by reference counting. You only need to call close
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# if you want to close the handle right away.
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g.close ()
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