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- import os
- from cffi import FFI
- from typing import Any, List
- # Workaround for the EON/termux build of Python having os.*xattr removed.
- ffi = FFI()
- ffi.cdef("""
- int setxattr(const char *path, const char *name, const void *value, size_t size, int flags);
- ssize_t getxattr(const char *path, const char *name, void *value, size_t size);
- ssize_t listxattr(const char *path, char *list, size_t size);
- int removexattr(const char *path, const char *name);
- """)
- libc = ffi.dlopen(None)
- def setxattr(path, name, value, flags=0) -> None:
- path = path.encode()
- name = name.encode()
- if libc.setxattr(path, name, value, len(value), flags) == -1:
- raise OSError(ffi.errno, f"{os.strerror(ffi.errno)}: setxattr({path}, {name}, {value}, {flags})")
- def getxattr(path, name, size=128):
- path = path.encode()
- name = name.encode()
- value = ffi.new(f"char[{size}]")
- l = libc.getxattr(path, name, value, size)
- if l == -1:
- # errno 61 means attribute hasn't been set
- if ffi.errno == 61:
- return None
- raise OSError(ffi.errno, f"{os.strerror(ffi.errno)}: getxattr({path}, {name}, {size})")
- return ffi.buffer(value)[:l]
- def listxattr(path, size=128) -> List[Any]:
- path = path.encode()
- attrs = ffi.new(f"char[{size}]")
- l = libc.listxattr(path, attrs, size)
- if l == -1:
- raise OSError(ffi.errno, f"{os.strerror(ffi.errno)}: listxattr({path}, {size})")
- # attrs is b'\0' delimited values (so chop off trailing empty item)
- return [a.decode() for a in ffi.buffer(attrs)[:l].split(b"\0")[0:-1]]
- def removexattr(path, name) -> None:
- path = path.encode()
- name = name.encode()
- if libc.removexattr(path, name) == -1:
- raise OSError(ffi.errno, f"{os.strerror(ffi.errno)}: removexattr({path}, {name})")
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