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dbc9a9f3e6
Summary: See D13964546 for context. Reviewed By: DurhamG, ikostia Differential Revision: D13982878 fbshipit-source-id: abce6f3c005b916cfb2e7a34276b99f9fcaa44b5
43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
# Copyright Facebook, Inc. 2018
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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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"""capabilities of well-known filesystems"""
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SYMLINK = "symlink"
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HARDLINK = "hardlink"
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EXECBIT = "execbit"
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ALWAYSCASESENSITIVE = "alwayscasesensitive"
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_ALL_CAPS = {SYMLINK: True, HARDLINK: True, EXECBIT: True, ALWAYSCASESENSITIVE: True}
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_FS_CAP_TABLE = {
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"apfs": {SYMLINK: True, HARDLINK: True, EXECBIT: True, ALWAYSCASESENSITIVE: False},
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"btrfs": _ALL_CAPS,
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"eden": {SYMLINK: True, HARDLINK: False, EXECBIT: True, ALWAYSCASESENSITIVE: True},
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"ext2": _ALL_CAPS,
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"ext3": _ALL_CAPS,
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"ext4": _ALL_CAPS,
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"fuse.ntfs": {
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SYMLINK: False,
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HARDLINK: True,
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EXECBIT: False,
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ALWAYSCASESENSITIVE: False,
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},
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"hfs": {SYMLINK: True, HARDLINK: True, EXECBIT: True, ALWAYSCASESENSITIVE: False},
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"jfs": _ALL_CAPS,
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"reiserfs": _ALL_CAPS,
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"tmpfs": _ALL_CAPS,
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"ufs": _ALL_CAPS,
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"xfs": _ALL_CAPS,
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"zfs": _ALL_CAPS,
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}
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def getfscap(fstype, cap):
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"""Test if a filesystem has specified capability.
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Return True if it has, False if it doesn't, or None if unsure.
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"""
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return _FS_CAP_TABLE.get(fstype, {}).get(cap)
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