You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.1 KiB
53 lines
1.1 KiB
"""
|
|
btrfs-snap.py: source target newname
|
|
|
|
creates a exactly named snapshots and bails out if they exist
|
|
"""
|
|
|
|
import argparse
|
|
import fcntl
|
|
import os
|
|
import sys
|
|
|
|
import cffi
|
|
|
|
ffi = cffi.FFI()
|
|
|
|
ffi.cdef("""
|
|
#define BTRFS_IOC_SNAP_CREATE_V2 ...
|
|
struct btrfs_ioctl_vol_args_v2 {
|
|
int64_t fd;
|
|
char name[];
|
|
...;
|
|
};
|
|
""")
|
|
|
|
ffi.set_source("_btrfs_cffi", "#include <btrfs/ioctl.h>")
|
|
ffi.compile()
|
|
|
|
# ____________________________________________________________
|
|
|
|
|
|
from _btrfs_cffi import ffi, lib
|
|
|
|
parser = argparse.ArgumentParser(usage=__doc__.strip())
|
|
parser.add_argument('source', help='source subvolume')
|
|
parser.add_argument('target', help='target directory')
|
|
parser.add_argument('newname', help='name of the new snapshot')
|
|
opts = parser.parse_args()
|
|
|
|
source = os.open(opts.source, os.O_DIRECTORY)
|
|
target = os.open(opts.target, os.O_DIRECTORY)
|
|
|
|
|
|
args = ffi.new('struct btrfs_ioctl_vol_args_v2 *')
|
|
args.name = opts.newname
|
|
args.fd = source
|
|
args_buffer = ffi.buffer(args)
|
|
try:
|
|
fcntl.ioctl(target, lib.BTRFS_IOC_SNAP_CREATE_V2, args_buffer)
|
|
except IOError as e:
|
|
print e
|
|
sys.exit(1)
|
|
|