Mercurial > hg
annotate mercurial/pure/osutil.py @ 32641:49e1e5acb8ff
py3: convert bool variables to bytes before passing into ui.debug()
We can't pass unicodes to ui.debug() and hence we need to convert things to
bytes before passing them.
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Thu, 01 Jun 2017 02:14:26 +0530 |
parents | 0e8b0b9a7acc |
children | 75979c8d4572 |
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 |
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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 .. import ( |
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17 pycompat, |
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18 ) |
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19 |
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20 def _mode_to_kind(mode): |
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21 if statmod.S_ISREG(mode): |
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22 return statmod.S_IFREG |
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23 if statmod.S_ISDIR(mode): |
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24 return statmod.S_IFDIR |
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25 if statmod.S_ISLNK(mode): |
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26 return statmod.S_IFLNK |
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27 if statmod.S_ISBLK(mode): |
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28 return statmod.S_IFBLK |
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29 if statmod.S_ISCHR(mode): |
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30 return statmod.S_IFCHR |
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31 if statmod.S_ISFIFO(mode): |
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32 return statmod.S_IFIFO |
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33 if statmod.S_ISSOCK(mode): |
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34 return statmod.S_IFSOCK |
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35 return mode |
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36 |
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37 def listdir(path, stat=False, skip=None): |
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38 '''listdir(path, stat=False) -> list_of_tuples |
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39 |
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40 Return a sorted list containing information about the entries |
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41 in the directory. |
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42 |
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43 If stat is True, each element is a 3-tuple: |
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44 |
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45 (name, type, stat object) |
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46 |
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47 Otherwise, each element is a 2-tuple: |
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48 |
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49 (name, type) |
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50 ''' |
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51 result = [] |
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52 prefix = path |
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53 if not prefix.endswith(pycompat.ossep): |
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54 prefix += pycompat.ossep |
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55 names = os.listdir(path) |
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56 names.sort() |
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57 for fn in names: |
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58 st = os.lstat(prefix + fn) |
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59 if fn == skip and statmod.S_ISDIR(st.st_mode): |
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60 return [] |
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61 if stat: |
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62 result.append((fn, _mode_to_kind(st.st_mode), st)) |
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63 else: |
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64 result.append((fn, _mode_to_kind(st.st_mode))) |
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65 return result |
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66 |
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67 if pycompat.osname != 'nt': |
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68 posixfile = open |
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69 |
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70 _SCM_RIGHTS = 0x01 |
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71 _socklen_t = ctypes.c_uint |
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72 |
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73 if pycompat.sysplatform.startswith('linux'): |
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74 # socket.h says "the type should be socklen_t but the definition of |
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75 # the kernel is incompatible with this." |
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76 _cmsg_len_t = ctypes.c_size_t |
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77 _msg_controllen_t = ctypes.c_size_t |
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78 _msg_iovlen_t = ctypes.c_size_t |
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79 else: |
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80 _cmsg_len_t = _socklen_t |
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81 _msg_controllen_t = _socklen_t |
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82 _msg_iovlen_t = ctypes.c_int |
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83 |
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84 class _iovec(ctypes.Structure): |
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85 _fields_ = [ |
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86 (u'iov_base', ctypes.c_void_p), |
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87 (u'iov_len', ctypes.c_size_t), |
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88 ] |
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89 |
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90 class _msghdr(ctypes.Structure): |
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91 _fields_ = [ |
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92 (u'msg_name', ctypes.c_void_p), |
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93 (u'msg_namelen', _socklen_t), |
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94 (u'msg_iov', ctypes.POINTER(_iovec)), |
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95 (u'msg_iovlen', _msg_iovlen_t), |
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96 (u'msg_control', ctypes.c_void_p), |
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97 (u'msg_controllen', _msg_controllen_t), |
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98 (u'msg_flags', ctypes.c_int), |
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99 ] |
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100 |
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101 class _cmsghdr(ctypes.Structure): |
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102 _fields_ = [ |
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103 (u'cmsg_len', _cmsg_len_t), |
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104 (u'cmsg_level', ctypes.c_int), |
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105 (u'cmsg_type', ctypes.c_int), |
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106 (u'cmsg_data', ctypes.c_ubyte * 0), |
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107 ] |
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108 |
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109 _libc = ctypes.CDLL(ctypes.util.find_library(u'c'), use_errno=True) |
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110 _recvmsg = getattr(_libc, 'recvmsg', None) |
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111 if _recvmsg: |
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112 _recvmsg.restype = getattr(ctypes, 'c_ssize_t', ctypes.c_long) |
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113 _recvmsg.argtypes = (ctypes.c_int, ctypes.POINTER(_msghdr), |
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114 ctypes.c_int) |
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115 else: |
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116 # recvmsg isn't always provided by libc; such systems are unsupported |
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117 def _recvmsg(sockfd, msg, flags): |
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118 raise NotImplementedError('unsupported platform') |
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119 |
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120 def _CMSG_FIRSTHDR(msgh): |
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121 if msgh.msg_controllen < ctypes.sizeof(_cmsghdr): |
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122 return |
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123 cmsgptr = ctypes.cast(msgh.msg_control, ctypes.POINTER(_cmsghdr)) |
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124 return cmsgptr.contents |
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125 |
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126 # The pure version is less portable than the native version because the |
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127 # handling of socket ancillary data heavily depends on C preprocessor. |
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128 # Also, some length fields are wrongly typed in Linux kernel. |
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129 def recvfds(sockfd): |
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130 """receive list of file descriptors via socket""" |
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131 dummy = (ctypes.c_ubyte * 1)() |
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132 iov = _iovec(ctypes.cast(dummy, ctypes.c_void_p), ctypes.sizeof(dummy)) |
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133 cbuf = ctypes.create_string_buffer(256) |
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134 msgh = _msghdr(None, 0, |
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135 ctypes.pointer(iov), 1, |
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136 ctypes.cast(cbuf, ctypes.c_void_p), ctypes.sizeof(cbuf), |
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137 0) |
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138 r = _recvmsg(sockfd, ctypes.byref(msgh), 0) |
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139 if r < 0: |
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140 e = ctypes.get_errno() |
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141 raise OSError(e, os.strerror(e)) |
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142 # assumes that the first cmsg has fds because it isn't easy to write |
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143 # portable CMSG_NXTHDR() with ctypes. |
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144 cmsg = _CMSG_FIRSTHDR(msgh) |
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145 if not cmsg: |
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146 return [] |
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147 if (cmsg.cmsg_level != socket.SOL_SOCKET or |
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148 cmsg.cmsg_type != _SCM_RIGHTS): |
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149 return [] |
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150 rfds = ctypes.cast(cmsg.cmsg_data, ctypes.POINTER(ctypes.c_int)) |
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151 rfdscount = ((cmsg.cmsg_len - _cmsghdr.cmsg_data.offset) / |
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152 ctypes.sizeof(ctypes.c_int)) |
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153 return [rfds[i] for i in xrange(rfdscount)] |
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154 |
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155 else: |
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156 import msvcrt |
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157 |
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158 _kernel32 = ctypes.windll.kernel32 |
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159 |
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160 _DWORD = ctypes.c_ulong |
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161 _LPCSTR = _LPSTR = ctypes.c_char_p |
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162 _HANDLE = ctypes.c_void_p |
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163 |
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164 _INVALID_HANDLE_VALUE = _HANDLE(-1).value |
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165 |
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166 # CreateFile |
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167 _FILE_SHARE_READ = 0x00000001 |
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168 _FILE_SHARE_WRITE = 0x00000002 |
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169 _FILE_SHARE_DELETE = 0x00000004 |
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170 |
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171 _CREATE_ALWAYS = 2 |
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172 _OPEN_EXISTING = 3 |
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173 _OPEN_ALWAYS = 4 |
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174 |
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175 _GENERIC_READ = 0x80000000 |
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176 _GENERIC_WRITE = 0x40000000 |
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177 |
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178 _FILE_ATTRIBUTE_NORMAL = 0x80 |
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179 |
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180 # open_osfhandle flags |
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181 _O_RDONLY = 0x0000 |
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182 _O_RDWR = 0x0002 |
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183 _O_APPEND = 0x0008 |
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184 |
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185 _O_TEXT = 0x4000 |
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186 _O_BINARY = 0x8000 |
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187 |
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188 # types of parameters of C functions used (required by pypy) |
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189 |
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190 _kernel32.CreateFileA.argtypes = [_LPCSTR, _DWORD, _DWORD, ctypes.c_void_p, |
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191 _DWORD, _DWORD, _HANDLE] |
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192 _kernel32.CreateFileA.restype = _HANDLE |
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193 |
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194 def _raiseioerror(name): |
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195 err = ctypes.WinError() |
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196 raise IOError(err.errno, '%s: %s' % (name, err.strerror)) |
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197 |
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198 class posixfile(object): |
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199 '''a file object aiming for POSIX-like semantics |
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200 |
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201 CPython's open() returns a file that was opened *without* setting the |
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202 _FILE_SHARE_DELETE flag, which causes rename and unlink to abort. |
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203 This even happens if any hardlinked copy of the file is in open state. |
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204 We set _FILE_SHARE_DELETE here, so files opened with posixfile can be |
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205 renamed and deleted while they are held open. |
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206 Note that if a file opened with posixfile is unlinked, the file |
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207 remains but cannot be opened again or be recreated under the same name, |
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208 until all reading processes have closed the file.''' |
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209 |
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210 def __init__(self, name, mode='r', bufsize=-1): |
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211 if 'b' in mode: |
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212 flags = _O_BINARY |
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213 else: |
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214 flags = _O_TEXT |
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215 |
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216 m0 = mode[0] |
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217 if m0 == 'r' and '+' not in mode: |
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218 flags |= _O_RDONLY |
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219 access = _GENERIC_READ |
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220 else: |
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221 # work around http://support.microsoft.com/kb/899149 and |
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222 # set _O_RDWR for 'w' and 'a', even if mode has no '+' |
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223 flags |= _O_RDWR |
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224 access = _GENERIC_READ | _GENERIC_WRITE |
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225 |
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226 if m0 == 'r': |
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227 creation = _OPEN_EXISTING |
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228 elif m0 == 'w': |
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229 creation = _CREATE_ALWAYS |
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230 elif m0 == 'a': |
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231 creation = _OPEN_ALWAYS |
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232 flags |= _O_APPEND |
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233 else: |
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234 raise ValueError("invalid mode: %s" % mode) |
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235 |
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236 fh = _kernel32.CreateFileA(name, access, |
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237 _FILE_SHARE_READ | _FILE_SHARE_WRITE | _FILE_SHARE_DELETE, |
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238 None, creation, _FILE_ATTRIBUTE_NORMAL, None) |
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239 if fh == _INVALID_HANDLE_VALUE: |
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240 _raiseioerror(name) |
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241 |
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242 fd = msvcrt.open_osfhandle(fh, flags) |
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243 if fd == -1: |
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244 _kernel32.CloseHandle(fh) |
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245 _raiseioerror(name) |
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246 |
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247 f = os.fdopen(fd, pycompat.sysstr(mode), bufsize) |
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248 # unfortunately, f.name is '<fdopen>' at this point -- so we store |
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249 # the name on this wrapper. We cannot just assign to f.name, |
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250 # because that attribute is read-only. |
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251 object.__setattr__(self, r'name', name) |
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252 object.__setattr__(self, r'_file', f) |
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253 |
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254 def __iter__(self): |
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255 return self._file |
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256 |
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257 def __getattr__(self, name): |
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258 return getattr(self._file, name) |
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259 |
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260 def __setattr__(self, name, value): |
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261 '''mimics the read-only attributes of Python file objects |
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262 by raising 'TypeError: readonly attribute' if someone tries: |
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263 f = posixfile('foo.txt') |
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264 f.name = 'bla' ''' |
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265 return self._file.__setattr__(name, value) |
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266 |
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267 def __enter__(self): |
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268 return self._file.__enter__() |
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269 |
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270 def __exit__(self, exc_type, exc_value, exc_tb): |
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271 return self._file.__exit__(exc_type, exc_value, exc_tb) |