Mercurial > hg
annotate mercurial/pure/osutil.py @ 45537:2f8227a12592
rhg: add `--revision` argument to `rhg files`
Add the option to list the tracked files of a revision given its number
or full node id.
Benched on a clone of moz-central
where tip is 1671467:81deaa1a68ebb28db0490954034ab38ab269409d
files -r 81deaa1a68ebb28db0490954034ab38ab269409d > out.txt
hg 0m1.633s
rhg 0m0.157s
files -r 81deaa1a68ebb28db0490954034ab38ab269409d > /dev/null
hg 0m0.415s
rhg 0m0.143s
Differential Revision: https://phab.mercurial-scm.org/D9015
author | Antoine Cezar <antoine.cezar@octobus.net> |
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date | Wed, 09 Sep 2020 14:53:15 +0200 |
parents | 9f70512ae2cf |
children | 346af7687c6f |
rev | line source |
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1 # osutil.py - pure Python version of osutil.c |
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2 # |
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3 # Copyright 2009 Matt Mackall <mpm@selenic.com> and others |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import, division |
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9 |
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10 import ctypes |
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11 import ctypes.util |
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12 import os |
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13 import socket |
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14 import stat as statmod |
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15 |
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16 from ..pycompat import getattr |
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17 from .. import ( |
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18 encoding, |
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19 pycompat, |
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20 ) |
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21 |
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22 |
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23 def _mode_to_kind(mode): |
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24 if statmod.S_ISREG(mode): |
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25 return statmod.S_IFREG |
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26 if statmod.S_ISDIR(mode): |
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27 return statmod.S_IFDIR |
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28 if statmod.S_ISLNK(mode): |
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29 return statmod.S_IFLNK |
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30 if statmod.S_ISBLK(mode): |
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31 return statmod.S_IFBLK |
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32 if statmod.S_ISCHR(mode): |
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33 return statmod.S_IFCHR |
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34 if statmod.S_ISFIFO(mode): |
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35 return statmod.S_IFIFO |
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36 if statmod.S_ISSOCK(mode): |
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37 return statmod.S_IFSOCK |
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38 return mode |
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39 |
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40 |
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41 def listdir(path, stat=False, skip=None): |
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42 '''listdir(path, stat=False) -> list_of_tuples |
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43 |
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44 Return a sorted list containing information about the entries |
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45 in the directory. |
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46 |
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47 If stat is True, each element is a 3-tuple: |
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48 |
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49 (name, type, stat object) |
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50 |
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51 Otherwise, each element is a 2-tuple: |
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52 |
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53 (name, type) |
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54 ''' |
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55 result = [] |
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56 prefix = path |
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57 if not prefix.endswith(pycompat.ossep): |
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58 prefix += pycompat.ossep |
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59 names = os.listdir(path) |
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60 names.sort() |
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61 for fn in names: |
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62 st = os.lstat(prefix + fn) |
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63 if fn == skip and statmod.S_ISDIR(st.st_mode): |
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64 return [] |
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65 if stat: |
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66 result.append((fn, _mode_to_kind(st.st_mode), st)) |
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67 else: |
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68 result.append((fn, _mode_to_kind(st.st_mode))) |
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69 return result |
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70 |
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71 |
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73 posixfile = open |
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74 |
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75 _SCM_RIGHTS = 0x01 |
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76 _socklen_t = ctypes.c_uint |
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77 |
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78 if pycompat.sysplatform.startswith(b'linux'): |
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79 # socket.h says "the type should be socklen_t but the definition of |
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80 # the kernel is incompatible with this." |
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81 _cmsg_len_t = ctypes.c_size_t |
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82 _msg_controllen_t = ctypes.c_size_t |
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83 _msg_iovlen_t = ctypes.c_size_t |
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84 else: |
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85 _cmsg_len_t = _socklen_t |
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86 _msg_controllen_t = _socklen_t |
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87 _msg_iovlen_t = ctypes.c_int |
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88 |
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89 class _iovec(ctypes.Structure): |
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90 _fields_ = [ |
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91 (u'iov_base', ctypes.c_void_p), |
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92 (u'iov_len', ctypes.c_size_t), |
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93 ] |
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94 |
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95 class _msghdr(ctypes.Structure): |
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96 _fields_ = [ |
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97 (u'msg_name', ctypes.c_void_p), |
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98 (u'msg_namelen', _socklen_t), |
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99 (u'msg_iov', ctypes.POINTER(_iovec)), |
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100 (u'msg_iovlen', _msg_iovlen_t), |
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101 (u'msg_control', ctypes.c_void_p), |
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102 (u'msg_controllen', _msg_controllen_t), |
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103 (u'msg_flags', ctypes.c_int), |
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104 ] |
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105 |
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106 class _cmsghdr(ctypes.Structure): |
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107 _fields_ = [ |
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108 (u'cmsg_len', _cmsg_len_t), |
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109 (u'cmsg_level', ctypes.c_int), |
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110 (u'cmsg_type', ctypes.c_int), |
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111 (u'cmsg_data', ctypes.c_ubyte * 0), |
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112 ] |
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113 |
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114 _libc = ctypes.CDLL(ctypes.util.find_library(u'c'), use_errno=True) |
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115 _recvmsg = getattr(_libc, 'recvmsg', None) |
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116 if _recvmsg: |
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117 _recvmsg.restype = getattr(ctypes, 'c_ssize_t', ctypes.c_long) |
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118 _recvmsg.argtypes = ( |
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119 ctypes.c_int, |
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120 ctypes.POINTER(_msghdr), |
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121 ctypes.c_int, |
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122 ) |
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123 else: |
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124 # recvmsg isn't always provided by libc; such systems are unsupported |
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125 def _recvmsg(sockfd, msg, flags): |
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126 raise NotImplementedError(b'unsupported platform') |
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127 |
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128 def _CMSG_FIRSTHDR(msgh): |
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129 if msgh.msg_controllen < ctypes.sizeof(_cmsghdr): |
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130 return |
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131 cmsgptr = ctypes.cast(msgh.msg_control, ctypes.POINTER(_cmsghdr)) |
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132 return cmsgptr.contents |
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133 |
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134 # The pure version is less portable than the native version because the |
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135 # handling of socket ancillary data heavily depends on C preprocessor. |
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136 # Also, some length fields are wrongly typed in Linux kernel. |
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137 def recvfds(sockfd): |
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138 """receive list of file descriptors via socket""" |
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139 dummy = (ctypes.c_ubyte * 1)() |
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140 iov = _iovec(ctypes.cast(dummy, ctypes.c_void_p), ctypes.sizeof(dummy)) |
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141 cbuf = ctypes.create_string_buffer(256) |
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142 msgh = _msghdr( |
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143 None, |
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144 0, |
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145 ctypes.pointer(iov), |
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146 1, |
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147 ctypes.cast(cbuf, ctypes.c_void_p), |
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148 ctypes.sizeof(cbuf), |
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149 0, |
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150 ) |
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151 r = _recvmsg(sockfd, ctypes.byref(msgh), 0) |
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152 if r < 0: |
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153 e = ctypes.get_errno() |
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154 raise OSError(e, os.strerror(e)) |
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155 # assumes that the first cmsg has fds because it isn't easy to write |
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156 # portable CMSG_NXTHDR() with ctypes. |
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157 cmsg = _CMSG_FIRSTHDR(msgh) |
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158 if not cmsg: |
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159 return [] |
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160 if ( |
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161 cmsg.cmsg_level != socket.SOL_SOCKET |
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162 or cmsg.cmsg_type != _SCM_RIGHTS |
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163 ): |
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164 return [] |
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165 rfds = ctypes.cast(cmsg.cmsg_data, ctypes.POINTER(ctypes.c_int)) |
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166 rfdscount = ( |
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167 cmsg.cmsg_len - _cmsghdr.cmsg_data.offset |
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168 ) // ctypes.sizeof(ctypes.c_int) |
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169 return [rfds[i] for i in pycompat.xrange(rfdscount)] |
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170 |
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171 |
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172 else: |
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173 import msvcrt |
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174 |
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175 _kernel32 = ctypes.windll.kernel32 |
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176 |
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177 _DWORD = ctypes.c_ulong |
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178 _LPCSTR = _LPSTR = ctypes.c_char_p |
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179 _HANDLE = ctypes.c_void_p |
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180 |
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181 _INVALID_HANDLE_VALUE = _HANDLE(-1).value |
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182 |
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183 # CreateFile |
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184 _FILE_SHARE_READ = 0x00000001 |
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185 _FILE_SHARE_WRITE = 0x00000002 |
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186 _FILE_SHARE_DELETE = 0x00000004 |
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187 |
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188 _CREATE_ALWAYS = 2 |
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189 _OPEN_EXISTING = 3 |
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190 _OPEN_ALWAYS = 4 |
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191 |
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192 _GENERIC_READ = 0x80000000 |
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193 _GENERIC_WRITE = 0x40000000 |
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194 |
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195 _FILE_ATTRIBUTE_NORMAL = 0x80 |
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196 |
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197 # open_osfhandle flags |
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198 _O_RDONLY = 0x0000 |
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199 _O_RDWR = 0x0002 |
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200 _O_APPEND = 0x0008 |
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201 |
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202 _O_TEXT = 0x4000 |
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203 _O_BINARY = 0x8000 |
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204 |
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205 # types of parameters of C functions used (required by pypy) |
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206 |
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207 _kernel32.CreateFileA.argtypes = [ |
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208 _LPCSTR, |
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209 _DWORD, |
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210 _DWORD, |
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211 ctypes.c_void_p, |
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212 _DWORD, |
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213 _DWORD, |
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214 _HANDLE, |
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215 ] |
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216 _kernel32.CreateFileA.restype = _HANDLE |
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217 |
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218 def _raiseioerror(name): |
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219 err = ctypes.WinError() |
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220 raise IOError( |
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221 err.errno, '%s: %s' % (encoding.strfromlocal(name), err.strerror) |
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222 ) |
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223 |
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224 class posixfile(object): |
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225 '''a file object aiming for POSIX-like semantics |
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226 |
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227 CPython's open() returns a file that was opened *without* setting the |
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228 _FILE_SHARE_DELETE flag, which causes rename and unlink to abort. |
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229 This even happens if any hardlinked copy of the file is in open state. |
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230 We set _FILE_SHARE_DELETE here, so files opened with posixfile can be |
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231 renamed and deleted while they are held open. |
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232 Note that if a file opened with posixfile is unlinked, the file |
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233 remains but cannot be opened again or be recreated under the same name, |
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234 until all reading processes have closed the file.''' |
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235 |
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236 def __init__(self, name, mode=b'r', bufsize=-1): |
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237 if b'b' in mode: |
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238 flags = _O_BINARY |
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239 else: |
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240 flags = _O_TEXT |
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241 |
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242 m0 = mode[0:1] |
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243 if m0 == b'r' and b'+' not in mode: |
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244 flags |= _O_RDONLY |
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245 access = _GENERIC_READ |
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246 else: |
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247 # work around http://support.microsoft.com/kb/899149 and |
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248 # set _O_RDWR for 'w' and 'a', even if mode has no '+' |
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249 flags |= _O_RDWR |
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250 access = _GENERIC_READ | _GENERIC_WRITE |
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251 |
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252 if m0 == b'r': |
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253 creation = _OPEN_EXISTING |
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254 elif m0 == b'w': |
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255 creation = _CREATE_ALWAYS |
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256 elif m0 == b'a': |
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257 creation = _OPEN_ALWAYS |
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258 flags |= _O_APPEND |
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259 else: |
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260 raise ValueError("invalid mode: %s" % pycompat.sysstr(mode)) |
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261 |
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262 fh = _kernel32.CreateFileA( |
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263 name, |
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264 access, |
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265 _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, |
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266 None, |
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267 creation, |
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268 _FILE_ATTRIBUTE_NORMAL, |
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269 None, |
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270 ) |
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271 if fh == _INVALID_HANDLE_VALUE: |
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272 _raiseioerror(name) |
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273 |
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274 fd = msvcrt.open_osfhandle(fh, flags) |
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275 if fd == -1: |
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276 _kernel32.CloseHandle(fh) |
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277 _raiseioerror(name) |
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278 |
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279 f = os.fdopen(fd, pycompat.sysstr(mode), bufsize) |
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280 # unfortunately, f.name is '<fdopen>' at this point -- so we store |
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281 # the name on this wrapper. We cannot just assign to f.name, |
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282 # because that attribute is read-only. |
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283 object.__setattr__(self, 'name', name) |
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284 object.__setattr__(self, '_file', f) |
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285 |
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286 def __iter__(self): |
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287 return self._file |
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288 |
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289 def __getattr__(self, name): |
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290 return getattr(self._file, name) |
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291 |
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292 def __setattr__(self, name, value): |
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293 '''mimics the read-only attributes of Python file objects |
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294 by raising 'TypeError: readonly attribute' if someone tries: |
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295 f = posixfile('foo.txt') |
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296 f.name = 'bla' ''' |
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297 return self._file.__setattr__(name, value) |
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298 |
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299 def __enter__(self): |
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300 self._file.__enter__() |
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301 return self |
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302 |
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303 def __exit__(self, exc_type, exc_value, exc_tb): |
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304 return self._file.__exit__(exc_type, exc_value, exc_tb) |