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# osutil.py - CFFI version of osutil.c
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#
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# Copyright 2016 Maciej Fijalkowski <fijall@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import annotations
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import os
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import stat as statmod
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from ..pure.osutil import *
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from .. import pycompat
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if pycompat.isdarwin:
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from . import _osutil # pytype: disable=import-error
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ffi = _osutil.ffi
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lib = _osutil.lib
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listdir_batch_size = 4096
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# tweakable number, only affects performance, which chunks
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# of bytes do we get back from getattrlistbulk
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attrkinds = [None] * 20 # we need the max no for enum VXXX, 20 is plenty
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attrkinds[lib.VREG] = statmod.S_IFREG
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attrkinds[lib.VDIR] = statmod.S_IFDIR
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attrkinds[lib.VLNK] = statmod.S_IFLNK
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attrkinds[lib.VBLK] = statmod.S_IFBLK
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attrkinds[lib.VCHR] = statmod.S_IFCHR
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attrkinds[lib.VFIFO] = statmod.S_IFIFO
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attrkinds[lib.VSOCK] = statmod.S_IFSOCK
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class stat_res:
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def __init__(self, st_mode, st_mtime, st_size):
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self.st_mode = st_mode
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self.st_mtime = st_mtime
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self.st_size = st_size
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tv_sec_ofs = ffi.offsetof("struct timespec", "tv_sec")
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buf = ffi.new("char[]", listdir_batch_size)
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def listdirinternal(dfd, req, stat, skip):
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ret = []
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while True:
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r = lib.getattrlistbulk(dfd, req, buf, listdir_batch_size, 0)
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if r == 0:
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break
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if r == -1:
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raise OSError(ffi.errno, os.strerror(ffi.errno))
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cur = ffi.cast("val_attrs_t*", buf)
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for i in range(r):
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lgt = cur.length
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assert lgt == ffi.cast('uint32_t*', cur)[0]
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ofs = cur.name_info.attr_dataoffset
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str_lgt = cur.name_info.attr_length
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base_ofs = ffi.offsetof('val_attrs_t', 'name_info')
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name = bytes(
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ffi.buffer(
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ffi.cast("char*", cur) + base_ofs + ofs, str_lgt - 1
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)
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)
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tp = attrkinds[cur.obj_type]
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if name == b"." or name == b"..":
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continue
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if skip == name and tp == statmod.S_ISDIR:
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return []
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if stat:
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mtime = cur.mtime.tv_sec
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mode = (cur.accessmask & ~lib.S_IFMT) | tp
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ret.append(
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(
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name,
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tp,
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stat_res(
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st_mode=mode,
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st_mtime=mtime,
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st_size=cur.datalength,
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),
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)
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)
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else:
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ret.append((name, tp))
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cur = ffi.cast(
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"val_attrs_t*", int(ffi.cast("intptr_t", cur)) + lgt
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)
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return ret
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def listdir(path, stat=False, skip=None):
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req = ffi.new("struct attrlist*")
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req.bitmapcount = lib.ATTR_BIT_MAP_COUNT
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req.commonattr = (
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lib.ATTR_CMN_RETURNED_ATTRS
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| lib.ATTR_CMN_NAME
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| lib.ATTR_CMN_OBJTYPE
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| lib.ATTR_CMN_ACCESSMASK
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| lib.ATTR_CMN_MODTIME
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)
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req.fileattr = lib.ATTR_FILE_DATALENGTH
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dfd = lib.open(path, lib.O_RDONLY, 0)
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if dfd == -1:
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raise OSError(ffi.errno, os.strerror(ffi.errno))
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try:
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ret = listdirinternal(dfd, req, stat, skip)
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finally:
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try:
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lib.close(dfd)
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except BaseException:
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pass # we ignore all the errors from closing, not
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# much we can do about that
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return ret
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