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@@ -1,666 +1,663 b'' | |||
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1 | 1 | # chgserver.py - command server extension for cHg |
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2 | 2 | # |
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3 | 3 | # Copyright 2011 Yuya Nishihara <yuya@tcha.org> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms of the |
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | |
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8 | 8 | """command server extension for cHg (EXPERIMENTAL) |
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9 | 9 | |
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10 | 10 | 'S' channel (read/write) |
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11 | 11 | propagate ui.system() request to client |
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12 | 12 | |
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13 | 13 | 'attachio' command |
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14 | 14 | attach client's stdio passed by sendmsg() |
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15 | 15 | |
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16 | 16 | 'chdir' command |
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17 | 17 | change current directory |
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18 | 18 | |
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19 | 19 | 'getpager' command |
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20 | 20 | checks if pager is enabled and which pager should be executed |
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21 | 21 | |
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22 | 22 | 'setenv' command |
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23 | 23 | replace os.environ completely |
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24 | 24 | |
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25 | 25 | 'setumask' command |
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26 | 26 | set umask |
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27 | 27 | |
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28 | 28 | 'validate' command |
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29 | 29 | reload the config and check if the server is up to date |
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30 | 30 | |
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31 | 31 | Config |
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32 | 32 | ------ |
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33 | 33 | |
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34 | 34 | :: |
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35 | 35 | |
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36 | 36 | [chgserver] |
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37 | 37 | idletimeout = 3600 # seconds, after which an idle server will exit |
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38 | 38 | skiphash = False # whether to skip config or env change checks |
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39 | 39 | """ |
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40 | 40 | |
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41 | 41 | from __future__ import absolute_import |
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42 | 42 | |
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43 | 43 | import errno |
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44 | 44 | import hashlib |
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45 | 45 | import inspect |
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46 | 46 | import os |
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47 | 47 | import re |
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48 | 48 | import signal |
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49 | 49 | import struct |
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50 | 50 | import sys |
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51 | 51 | import threading |
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52 | 52 | import time |
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53 | 53 | |
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54 | 54 | from mercurial.i18n import _ |
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55 | 55 | |
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56 | 56 | from mercurial import ( |
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57 | 57 | cmdutil, |
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58 | 58 | commands, |
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59 | 59 | commandserver, |
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60 | 60 | dispatch, |
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61 | 61 | error, |
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62 | 62 | extensions, |
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63 | 63 | osutil, |
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64 | 64 | util, |
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65 | 65 | ) |
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66 | 66 | |
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67 | 67 | socketserver = util.socketserver |
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68 | 68 | |
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69 | 69 | # Note for extension authors: ONLY specify testedwith = 'internal' for |
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70 | 70 | # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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71 | 71 | # be specifying the version(s) of Mercurial they are tested with, or |
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72 | 72 | # leave the attribute unspecified. |
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73 | 73 | testedwith = 'internal' |
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74 | 74 | |
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75 | 75 | _log = commandserver.log |
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76 | 76 | |
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77 | 77 | def _hashlist(items): |
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78 | 78 | """return sha1 hexdigest for a list""" |
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79 | 79 | return hashlib.sha1(str(items)).hexdigest() |
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80 | 80 | |
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81 | 81 | # sensitive config sections affecting confighash |
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82 | 82 | _configsections = [ |
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83 | 83 | 'alias', # affects global state commands.table |
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84 | 84 | 'extdiff', # uisetup will register new commands |
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85 | 85 | 'extensions', |
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86 | 86 | ] |
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87 | 87 | |
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88 | 88 | # sensitive environment variables affecting confighash |
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89 | 89 | _envre = re.compile(r'''\A(?: |
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90 | 90 | CHGHG |
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91 | 91 | |HG.* |
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92 | 92 | |LANG(?:UAGE)? |
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93 | 93 | |LC_.* |
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94 | 94 | |LD_.* |
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95 | 95 | |PATH |
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96 | 96 | |PYTHON.* |
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97 | 97 | |TERM(?:INFO)? |
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98 | 98 | |TZ |
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99 | 99 | )\Z''', re.X) |
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100 | 100 | |
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101 | 101 | def _confighash(ui): |
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102 | 102 | """return a quick hash for detecting config/env changes |
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103 | 103 | |
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104 | 104 | confighash is the hash of sensitive config items and environment variables. |
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105 | 105 | |
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106 | 106 | for chgserver, it is designed that once confighash changes, the server is |
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107 | 107 | not qualified to serve its client and should redirect the client to a new |
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108 | 108 | server. different from mtimehash, confighash change will not mark the |
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109 | 109 | server outdated and exit since the user can have different configs at the |
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110 | 110 | same time. |
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111 | 111 | """ |
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112 | 112 | sectionitems = [] |
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113 | 113 | for section in _configsections: |
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114 | 114 | sectionitems.append(ui.configitems(section)) |
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115 | 115 | sectionhash = _hashlist(sectionitems) |
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116 | 116 | envitems = [(k, v) for k, v in os.environ.iteritems() if _envre.match(k)] |
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117 | 117 | envhash = _hashlist(sorted(envitems)) |
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118 | 118 | return sectionhash[:6] + envhash[:6] |
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119 | 119 | |
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120 | 120 | def _getmtimepaths(ui): |
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121 | 121 | """get a list of paths that should be checked to detect change |
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122 | 122 | |
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123 | 123 | The list will include: |
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124 | 124 | - extensions (will not cover all files for complex extensions) |
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125 | 125 | - mercurial/__version__.py |
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126 | 126 | - python binary |
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127 | 127 | """ |
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128 | 128 | modules = [m for n, m in extensions.extensions(ui)] |
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129 | 129 | try: |
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130 | 130 | from mercurial import __version__ |
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131 | 131 | modules.append(__version__) |
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132 | 132 | except ImportError: |
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133 | 133 | pass |
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134 | 134 | files = [sys.executable] |
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135 | 135 | for m in modules: |
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136 | 136 | try: |
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137 | 137 | files.append(inspect.getabsfile(m)) |
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138 | 138 | except TypeError: |
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139 | 139 | pass |
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140 | 140 | return sorted(set(files)) |
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141 | 141 | |
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142 | 142 | def _mtimehash(paths): |
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143 | 143 | """return a quick hash for detecting file changes |
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144 | 144 | |
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145 | 145 | mtimehash calls stat on given paths and calculate a hash based on size and |
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146 | 146 | mtime of each file. mtimehash does not read file content because reading is |
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147 | 147 | expensive. therefore it's not 100% reliable for detecting content changes. |
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148 | 148 | it's possible to return different hashes for same file contents. |
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149 | 149 | it's also possible to return a same hash for different file contents for |
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150 | 150 | some carefully crafted situation. |
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151 | 151 | |
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152 | 152 | for chgserver, it is designed that once mtimehash changes, the server is |
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153 | 153 | considered outdated immediately and should no longer provide service. |
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154 | 154 | |
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155 | 155 | mtimehash is not included in confighash because we only know the paths of |
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156 | 156 | extensions after importing them (there is imp.find_module but that faces |
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157 | 157 | race conditions). We need to calculate confighash without importing. |
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158 | 158 | """ |
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159 | 159 | def trystat(path): |
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160 | 160 | try: |
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161 | 161 | st = os.stat(path) |
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162 | 162 | return (st.st_mtime, st.st_size) |
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163 | 163 | except OSError: |
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164 | 164 | # could be ENOENT, EPERM etc. not fatal in any case |
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165 | 165 | pass |
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166 | 166 | return _hashlist(map(trystat, paths))[:12] |
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167 | 167 | |
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168 | 168 | class hashstate(object): |
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169 | 169 | """a structure storing confighash, mtimehash, paths used for mtimehash""" |
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170 | 170 | def __init__(self, confighash, mtimehash, mtimepaths): |
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171 | 171 | self.confighash = confighash |
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172 | 172 | self.mtimehash = mtimehash |
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173 | 173 | self.mtimepaths = mtimepaths |
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174 | 174 | |
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175 | 175 | @staticmethod |
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176 | 176 | def fromui(ui, mtimepaths=None): |
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177 | 177 | if mtimepaths is None: |
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178 | 178 | mtimepaths = _getmtimepaths(ui) |
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179 | 179 | confighash = _confighash(ui) |
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180 | 180 | mtimehash = _mtimehash(mtimepaths) |
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181 | 181 | _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash)) |
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182 | 182 | return hashstate(confighash, mtimehash, mtimepaths) |
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183 | 183 | |
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184 | 184 | # copied from hgext/pager.py:uisetup() |
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185 | 185 | def _setuppagercmd(ui, options, cmd): |
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186 | 186 | if not ui.formatted(): |
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187 | 187 | return |
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188 | 188 | |
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189 | 189 | p = ui.config("pager", "pager", os.environ.get("PAGER")) |
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190 | 190 | usepager = False |
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191 | 191 | always = util.parsebool(options['pager']) |
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192 | 192 | auto = options['pager'] == 'auto' |
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193 | 193 | |
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194 | 194 | if not p: |
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195 | 195 | pass |
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196 | 196 | elif always: |
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197 | 197 | usepager = True |
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198 | 198 | elif not auto: |
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199 | 199 | usepager = False |
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200 | 200 | else: |
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201 | 201 | attended = ['annotate', 'cat', 'diff', 'export', 'glog', 'log', 'qdiff'] |
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202 | 202 | attend = ui.configlist('pager', 'attend', attended) |
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203 | 203 | ignore = ui.configlist('pager', 'ignore') |
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204 | 204 | cmds, _ = cmdutil.findcmd(cmd, commands.table) |
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205 | 205 | |
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206 | 206 | for cmd in cmds: |
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207 | 207 | var = 'attend-%s' % cmd |
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208 | 208 | if ui.config('pager', var): |
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209 | 209 | usepager = ui.configbool('pager', var) |
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210 | 210 | break |
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211 | 211 | if (cmd in attend or |
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212 | 212 | (cmd not in ignore and not attend)): |
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213 | 213 | usepager = True |
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214 | 214 | break |
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215 | 215 | |
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216 | 216 | if usepager: |
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217 | 217 | ui.setconfig('ui', 'formatted', ui.formatted(), 'pager') |
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218 | 218 | ui.setconfig('ui', 'interactive', False, 'pager') |
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219 | 219 | return p |
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220 | 220 | |
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221 | 221 | def _newchgui(srcui, csystem): |
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222 | 222 | class chgui(srcui.__class__): |
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223 | 223 | def __init__(self, src=None): |
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224 | 224 | super(chgui, self).__init__(src) |
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225 | 225 | if src: |
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226 | 226 | self._csystem = getattr(src, '_csystem', csystem) |
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227 | 227 | else: |
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228 | 228 | self._csystem = csystem |
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229 | 229 | |
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230 | 230 | def system(self, cmd, environ=None, cwd=None, onerr=None, |
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231 | 231 | errprefix=None): |
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232 | 232 | # fallback to the original system method if the output needs to be |
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233 | 233 | # captured (to self._buffers), or the output stream is not stdout |
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234 | 234 | # (e.g. stderr, cStringIO), because the chg client is not aware of |
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235 | 235 | # these situations and will behave differently (write to stdout). |
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236 | 236 | if (any(s[1] for s in self._bufferstates) |
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237 | 237 | or not util.safehasattr(self.fout, 'fileno') |
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238 | 238 | or self.fout.fileno() != sys.stdout.fileno()): |
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239 | 239 | return super(chgui, self).system(cmd, environ, cwd, onerr, |
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240 | 240 | errprefix) |
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241 | 241 | # copied from mercurial/util.py:system() |
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242 | 242 | self.flush() |
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243 | 243 | def py2shell(val): |
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244 | 244 | if val is None or val is False: |
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245 | 245 | return '0' |
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246 | 246 | if val is True: |
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247 | 247 | return '1' |
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248 | 248 | return str(val) |
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249 | 249 | env = os.environ.copy() |
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250 | 250 | if environ: |
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251 | 251 | env.update((k, py2shell(v)) for k, v in environ.iteritems()) |
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252 | 252 | env['HG'] = util.hgexecutable() |
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253 | 253 | rc = self._csystem(cmd, env, cwd) |
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254 | 254 | if rc and onerr: |
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255 | 255 | errmsg = '%s %s' % (os.path.basename(cmd.split(None, 1)[0]), |
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256 | 256 | util.explainexit(rc)[0]) |
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257 | 257 | if errprefix: |
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258 | 258 | errmsg = '%s: %s' % (errprefix, errmsg) |
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259 | 259 | raise onerr(errmsg) |
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260 | 260 | return rc |
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261 | 261 | |
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262 | 262 | return chgui(srcui) |
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263 | 263 | |
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264 | 264 | def _loadnewui(srcui, args): |
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265 | 265 | newui = srcui.__class__() |
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266 | 266 | for a in ['fin', 'fout', 'ferr', 'environ']: |
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267 | 267 | setattr(newui, a, getattr(srcui, a)) |
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268 | 268 | if util.safehasattr(srcui, '_csystem'): |
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269 | 269 | newui._csystem = srcui._csystem |
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270 | 270 | |
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271 | 271 | # internal config: extensions.chgserver |
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272 | 272 | newui.setconfig('extensions', 'chgserver', |
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273 | 273 | srcui.config('extensions', 'chgserver'), '--config') |
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274 | 274 | |
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275 | 275 | # command line args |
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276 | 276 | args = args[:] |
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277 | 277 | dispatch._parseconfig(newui, dispatch._earlygetopt(['--config'], args)) |
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278 | 278 | |
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279 | 279 | # stolen from tortoisehg.util.copydynamicconfig() |
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280 | 280 | for section, name, value in srcui.walkconfig(): |
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281 | 281 | source = srcui.configsource(section, name) |
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282 | 282 | if ':' in source or source == '--config': |
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283 | 283 | # path:line or command line |
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284 | 284 | continue |
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285 | 285 | if source == 'none': |
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286 | 286 | # ui.configsource returns 'none' by default |
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287 | 287 | source = '' |
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288 | 288 | newui.setconfig(section, name, value, source) |
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289 | 289 | |
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290 | 290 | # load wd and repo config, copied from dispatch.py |
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291 | 291 | cwds = dispatch._earlygetopt(['--cwd'], args) |
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292 | 292 | cwd = cwds and os.path.realpath(cwds[-1]) or None |
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293 | 293 | rpath = dispatch._earlygetopt(["-R", "--repository", "--repo"], args) |
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294 | 294 | path, newlui = dispatch._getlocal(newui, rpath, wd=cwd) |
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295 | 295 | |
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296 | 296 | return (newui, newlui) |
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297 | 297 | |
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298 | 298 | class channeledsystem(object): |
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299 | 299 | """Propagate ui.system() request in the following format: |
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300 | 300 | |
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301 | 301 | payload length (unsigned int), |
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302 | 302 | cmd, '\0', |
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303 | 303 | cwd, '\0', |
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304 | 304 | envkey, '=', val, '\0', |
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305 | 305 | ... |
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306 | 306 | envkey, '=', val |
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307 | 307 | |
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308 | 308 | and waits: |
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309 | 309 | |
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310 | 310 | exitcode length (unsigned int), |
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311 | 311 | exitcode (int) |
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312 | 312 | """ |
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313 | 313 | def __init__(self, in_, out, channel): |
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314 | 314 | self.in_ = in_ |
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315 | 315 | self.out = out |
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316 | 316 | self.channel = channel |
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317 | 317 | |
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318 | 318 | def __call__(self, cmd, environ, cwd): |
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319 | 319 | args = [util.quotecommand(cmd), os.path.abspath(cwd or '.')] |
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320 | 320 | args.extend('%s=%s' % (k, v) for k, v in environ.iteritems()) |
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321 | 321 | data = '\0'.join(args) |
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322 | 322 | self.out.write(struct.pack('>cI', self.channel, len(data))) |
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323 | 323 | self.out.write(data) |
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324 | 324 | self.out.flush() |
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325 | 325 | |
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326 | 326 | length = self.in_.read(4) |
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327 | 327 | length, = struct.unpack('>I', length) |
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328 | 328 | if length != 4: |
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329 | 329 | raise error.Abort(_('invalid response')) |
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330 | 330 | rc, = struct.unpack('>i', self.in_.read(4)) |
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331 | 331 | return rc |
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332 | 332 | |
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333 | 333 | _iochannels = [ |
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334 | 334 | # server.ch, ui.fp, mode |
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335 | 335 | ('cin', 'fin', 'rb'), |
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336 | 336 | ('cout', 'fout', 'wb'), |
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337 | 337 | ('cerr', 'ferr', 'wb'), |
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338 | 338 | ] |
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339 | 339 | |
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340 | 340 | class chgcmdserver(commandserver.server): |
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341 | 341 | def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress): |
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342 | 342 | super(chgcmdserver, self).__init__( |
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343 | 343 | _newchgui(ui, channeledsystem(fin, fout, 'S')), repo, fin, fout) |
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344 | 344 | self.clientsock = sock |
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345 | 345 | self._oldios = [] # original (self.ch, ui.fp, fd) before "attachio" |
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346 | 346 | self.hashstate = hashstate |
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347 | 347 | self.baseaddress = baseaddress |
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348 | 348 | if hashstate is not None: |
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349 | 349 | self.capabilities = self.capabilities.copy() |
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350 | 350 | self.capabilities['validate'] = chgcmdserver.validate |
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351 | 351 | |
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352 | 352 | def cleanup(self): |
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353 | 353 | super(chgcmdserver, self).cleanup() |
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354 | 354 | # dispatch._runcatch() does not flush outputs if exception is not |
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355 | 355 | # handled by dispatch._dispatch() |
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356 | 356 | self.ui.flush() |
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357 | 357 | self._restoreio() |
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358 | 358 | |
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359 | 359 | def attachio(self): |
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360 | 360 | """Attach to client's stdio passed via unix domain socket; all |
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361 | 361 | channels except cresult will no longer be used |
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362 | 362 | """ |
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363 | 363 | # tell client to sendmsg() with 1-byte payload, which makes it |
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364 | 364 | # distinctive from "attachio\n" command consumed by client.read() |
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365 | 365 | self.clientsock.sendall(struct.pack('>cI', 'I', 1)) |
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366 | 366 | clientfds = osutil.recvfds(self.clientsock.fileno()) |
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367 | 367 | _log('received fds: %r\n' % clientfds) |
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368 | 368 | |
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369 | 369 | ui = self.ui |
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370 | 370 | ui.flush() |
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371 | 371 | first = self._saveio() |
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372 | 372 | for fd, (cn, fn, mode) in zip(clientfds, _iochannels): |
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373 | 373 | assert fd > 0 |
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374 | 374 | fp = getattr(ui, fn) |
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375 | 375 | os.dup2(fd, fp.fileno()) |
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376 | 376 | os.close(fd) |
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377 | 377 | if not first: |
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378 | 378 | continue |
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379 | 379 | # reset buffering mode when client is first attached. as we want |
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380 | 380 | # to see output immediately on pager, the mode stays unchanged |
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381 | 381 | # when client re-attached. ferr is unchanged because it should |
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382 | 382 | # be unbuffered no matter if it is a tty or not. |
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383 | 383 | if fn == 'ferr': |
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384 | 384 | newfp = fp |
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385 | 385 | else: |
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386 | 386 | # make it line buffered explicitly because the default is |
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387 | 387 | # decided on first write(), where fout could be a pager. |
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388 | 388 | if fp.isatty(): |
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389 | 389 | bufsize = 1 # line buffered |
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390 | 390 | else: |
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391 | 391 | bufsize = -1 # system default |
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392 | 392 | newfp = os.fdopen(fp.fileno(), mode, bufsize) |
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393 | 393 | setattr(ui, fn, newfp) |
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394 | 394 | setattr(self, cn, newfp) |
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395 | 395 | |
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396 | 396 | self.cresult.write(struct.pack('>i', len(clientfds))) |
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397 | 397 | |
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398 | 398 | def _saveio(self): |
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399 | 399 | if self._oldios: |
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400 | 400 | return False |
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401 | 401 | ui = self.ui |
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402 | 402 | for cn, fn, _mode in _iochannels: |
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403 | 403 | ch = getattr(self, cn) |
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404 | 404 | fp = getattr(ui, fn) |
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405 | 405 | fd = os.dup(fp.fileno()) |
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406 | 406 | self._oldios.append((ch, fp, fd)) |
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407 | 407 | return True |
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408 | 408 | |
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409 | 409 | def _restoreio(self): |
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410 | 410 | ui = self.ui |
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411 | 411 | for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels): |
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412 | 412 | newfp = getattr(ui, fn) |
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413 | 413 | # close newfp while it's associated with client; otherwise it |
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414 | 414 | # would be closed when newfp is deleted |
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415 | 415 | if newfp is not fp: |
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416 | 416 | newfp.close() |
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417 | 417 | # restore original fd: fp is open again |
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418 | 418 | os.dup2(fd, fp.fileno()) |
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419 | 419 | os.close(fd) |
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420 | 420 | setattr(self, cn, ch) |
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421 | 421 | setattr(ui, fn, fp) |
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422 | 422 | del self._oldios[:] |
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423 | 423 | |
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424 | 424 | def validate(self): |
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425 | 425 | """Reload the config and check if the server is up to date |
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426 | 426 | |
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427 | 427 | Read a list of '\0' separated arguments. |
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428 | 428 | Write a non-empty list of '\0' separated instruction strings or '\0' |
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429 | 429 | if the list is empty. |
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430 | 430 | An instruction string could be either: |
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431 | 431 | - "unlink $path", the client should unlink the path to stop the |
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432 | 432 | outdated server. |
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433 | 433 | - "redirect $path", the client should attempt to connect to $path |
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434 | 434 | first. If it does not work, start a new server. It implies |
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435 | 435 | "reconnect". |
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436 | 436 | - "exit $n", the client should exit directly with code n. |
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437 | 437 | This may happen if we cannot parse the config. |
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438 | 438 | - "reconnect", the client should close the connection and |
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439 | 439 | reconnect. |
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440 | 440 | If neither "reconnect" nor "redirect" is included in the instruction |
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441 | 441 | list, the client can continue with this server after completing all |
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442 | 442 | the instructions. |
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443 | 443 | """ |
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444 | 444 | args = self._readlist() |
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445 | 445 | try: |
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446 | 446 | self.ui, lui = _loadnewui(self.ui, args) |
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447 | 447 | except error.ParseError as inst: |
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448 | 448 | dispatch._formatparse(self.ui.warn, inst) |
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449 | 449 | self.ui.flush() |
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450 | 450 | self.cresult.write('exit 255') |
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451 | 451 | return |
|
452 | 452 | newhash = hashstate.fromui(lui, self.hashstate.mtimepaths) |
|
453 | 453 | insts = [] |
|
454 | 454 | if newhash.mtimehash != self.hashstate.mtimehash: |
|
455 | 455 | addr = _hashaddress(self.baseaddress, self.hashstate.confighash) |
|
456 | 456 | insts.append('unlink %s' % addr) |
|
457 | 457 | # mtimehash is empty if one or more extensions fail to load. |
|
458 | 458 | # to be compatible with hg, still serve the client this time. |
|
459 | 459 | if self.hashstate.mtimehash: |
|
460 | 460 | insts.append('reconnect') |
|
461 | 461 | if newhash.confighash != self.hashstate.confighash: |
|
462 | 462 | addr = _hashaddress(self.baseaddress, newhash.confighash) |
|
463 | 463 | insts.append('redirect %s' % addr) |
|
464 | 464 | _log('validate: %s\n' % insts) |
|
465 | 465 | self.cresult.write('\0'.join(insts) or '\0') |
|
466 | 466 | |
|
467 | 467 | def chdir(self): |
|
468 | 468 | """Change current directory |
|
469 | 469 | |
|
470 | 470 | Note that the behavior of --cwd option is bit different from this. |
|
471 | 471 | It does not affect --config parameter. |
|
472 | 472 | """ |
|
473 | 473 | path = self._readstr() |
|
474 | 474 | if not path: |
|
475 | 475 | return |
|
476 | 476 | _log('chdir to %r\n' % path) |
|
477 | 477 | os.chdir(path) |
|
478 | 478 | |
|
479 | 479 | def setumask(self): |
|
480 | 480 | """Change umask""" |
|
481 | 481 | mask = struct.unpack('>I', self._read(4))[0] |
|
482 | 482 | _log('setumask %r\n' % mask) |
|
483 | 483 | os.umask(mask) |
|
484 | 484 | |
|
485 | 485 | def getpager(self): |
|
486 | 486 | """Read cmdargs and write pager command to r-channel if enabled |
|
487 | 487 | |
|
488 | 488 | If pager isn't enabled, this writes '\0' because channeledoutput |
|
489 | 489 | does not allow to write empty data. |
|
490 | 490 | """ |
|
491 | 491 | args = self._readlist() |
|
492 | 492 | try: |
|
493 | 493 | cmd, _func, args, options, _cmdoptions = dispatch._parse(self.ui, |
|
494 | 494 | args) |
|
495 | 495 | except (error.Abort, error.AmbiguousCommand, error.CommandError, |
|
496 | 496 | error.UnknownCommand): |
|
497 | 497 | cmd = None |
|
498 | 498 | options = {} |
|
499 | 499 | if not cmd or 'pager' not in options: |
|
500 | 500 | self.cresult.write('\0') |
|
501 | 501 | return |
|
502 | 502 | |
|
503 | 503 | pagercmd = _setuppagercmd(self.ui, options, cmd) |
|
504 | 504 | if pagercmd: |
|
505 | 505 | # Python's SIGPIPE is SIG_IGN by default. change to SIG_DFL so |
|
506 | 506 | # we can exit if the pipe to the pager is closed |
|
507 | 507 | if util.safehasattr(signal, 'SIGPIPE') and \ |
|
508 | 508 | signal.getsignal(signal.SIGPIPE) == signal.SIG_IGN: |
|
509 | 509 | signal.signal(signal.SIGPIPE, signal.SIG_DFL) |
|
510 | 510 | self.cresult.write(pagercmd) |
|
511 | 511 | else: |
|
512 | 512 | self.cresult.write('\0') |
|
513 | 513 | |
|
514 | 514 | def setenv(self): |
|
515 | 515 | """Clear and update os.environ |
|
516 | 516 | |
|
517 | 517 | Note that not all variables can make an effect on the running process. |
|
518 | 518 | """ |
|
519 | 519 | l = self._readlist() |
|
520 | 520 | try: |
|
521 | 521 | newenv = dict(s.split('=', 1) for s in l) |
|
522 | 522 | except ValueError: |
|
523 | 523 | raise ValueError('unexpected value in setenv request') |
|
524 | 524 | _log('setenv: %r\n' % sorted(newenv.keys())) |
|
525 | 525 | os.environ.clear() |
|
526 | 526 | os.environ.update(newenv) |
|
527 | 527 | |
|
528 | 528 | capabilities = commandserver.server.capabilities.copy() |
|
529 | 529 | capabilities.update({'attachio': attachio, |
|
530 | 530 | 'chdir': chdir, |
|
531 | 531 | 'getpager': getpager, |
|
532 | 532 | 'setenv': setenv, |
|
533 | 533 | 'setumask': setumask}) |
|
534 | 534 | |
|
535 | 535 | class _requesthandler(commandserver._requesthandler): |
|
536 | 536 | def _createcmdserver(self): |
|
537 | 537 | ui = self.server.ui |
|
538 | 538 | repo = self.server.repo |
|
539 | 539 | return chgcmdserver(ui, repo, self.rfile, self.wfile, self.connection, |
|
540 | 540 | self.server.hashstate, self.server.baseaddress) |
|
541 | 541 | |
|
542 | 542 | def _tempaddress(address): |
|
543 | 543 | return '%s.%d.tmp' % (address, os.getpid()) |
|
544 | 544 | |
|
545 | 545 | def _hashaddress(address, hashstr): |
|
546 | 546 | return '%s-%s' % (address, hashstr) |
|
547 | 547 | |
|
548 | 548 | class AutoExitMixIn: # use old-style to comply with SocketServer design |
|
549 | 549 | lastactive = time.time() |
|
550 | 550 | idletimeout = 3600 # default 1 hour |
|
551 | 551 | |
|
552 | 552 | def startautoexitthread(self): |
|
553 | 553 | # note: the auto-exit check here is cheap enough to not use a thread, |
|
554 | 554 | # be done in serve_forever. however SocketServer is hook-unfriendly, |
|
555 | 555 | # you simply cannot hook serve_forever without copying a lot of code. |
|
556 | 556 | # besides, serve_forever's docstring suggests using thread. |
|
557 | 557 | thread = threading.Thread(target=self._autoexitloop) |
|
558 | 558 | thread.daemon = True |
|
559 | 559 | thread.start() |
|
560 | 560 | |
|
561 | 561 | def _autoexitloop(self, interval=1): |
|
562 | 562 | while True: |
|
563 | 563 | time.sleep(interval) |
|
564 | 564 | if not self.issocketowner(): |
|
565 | 565 | _log('%s is not owned, exiting.\n' % self.server_address) |
|
566 | 566 | break |
|
567 | 567 | if time.time() - self.lastactive > self.idletimeout: |
|
568 | 568 | _log('being idle too long. exiting.\n') |
|
569 | 569 | break |
|
570 | 570 | self.shutdown() |
|
571 | 571 | |
|
572 | 572 | def process_request(self, request, address): |
|
573 | 573 | self.lastactive = time.time() |
|
574 | 574 | return socketserver.ForkingMixIn.process_request( |
|
575 | 575 | self, request, address) |
|
576 | 576 | |
|
577 | 577 | def server_bind(self): |
|
578 | 578 | # use a unique temp address so we can stat the file and do ownership |
|
579 | 579 | # check later |
|
580 | 580 | tempaddress = _tempaddress(self.server_address) |
|
581 | 581 | util.bindunixsocket(self.socket, tempaddress) |
|
582 | 582 | self._socketstat = os.stat(tempaddress) |
|
583 | 583 | # rename will replace the old socket file if exists atomically. the |
|
584 | 584 | # old server will detect ownership change and exit. |
|
585 | 585 | util.rename(tempaddress, self.server_address) |
|
586 | 586 | |
|
587 | 587 | def issocketowner(self): |
|
588 | 588 | try: |
|
589 | 589 | stat = os.stat(self.server_address) |
|
590 | 590 | return (stat.st_ino == self._socketstat.st_ino and |
|
591 | 591 | stat.st_mtime == self._socketstat.st_mtime) |
|
592 | 592 | except OSError: |
|
593 | 593 | return False |
|
594 | 594 | |
|
595 | 595 | def unlinksocketfile(self): |
|
596 | 596 | if not self.issocketowner(): |
|
597 | 597 | return |
|
598 | 598 | # it is possible to have a race condition here that we may |
|
599 | 599 | # remove another server's socket file. but that's okay |
|
600 | 600 | # since that server will detect and exit automatically and |
|
601 | 601 | # the client will start a new server on demand. |
|
602 | 602 | try: |
|
603 | 603 | os.unlink(self.server_address) |
|
604 | 604 | except OSError as exc: |
|
605 | 605 | if exc.errno != errno.ENOENT: |
|
606 | 606 | raise |
|
607 | 607 | |
|
608 | 608 | class chgunixservice(commandserver.unixservice): |
|
609 | 609 | def __init__(self, ui, repo, opts): |
|
610 | 610 | super(chgunixservice, self).__init__(ui, repo=None, opts=opts) |
|
611 | 611 | if repo: |
|
612 | 612 | # one chgserver can serve multiple repos. drop repo infomation |
|
613 | 613 | self.ui.setconfig('bundle', 'mainreporoot', '', 'repo') |
|
614 | 614 | |
|
615 | 615 | def init(self): |
|
616 | 616 | self._inithashstate() |
|
617 | 617 | self._checkextensions() |
|
618 | 618 | class cls(AutoExitMixIn, socketserver.ForkingMixIn, |
|
619 | 619 | socketserver.UnixStreamServer): |
|
620 | 620 | ui = self.ui |
|
621 | 621 | repo = self.repo |
|
622 | 622 | hashstate = self.hashstate |
|
623 | 623 | baseaddress = self.baseaddress |
|
624 | 624 | self.server = cls(self.address, _requesthandler) |
|
625 | 625 | self.server.idletimeout = self.ui.configint( |
|
626 | 626 | 'chgserver', 'idletimeout', self.server.idletimeout) |
|
627 | 627 | self.server.startautoexitthread() |
|
628 | 628 | self._createsymlink() |
|
629 | 629 | |
|
630 | 630 | def _inithashstate(self): |
|
631 | 631 | self.baseaddress = self.address |
|
632 | 632 | if self.ui.configbool('chgserver', 'skiphash', False): |
|
633 | 633 | self.hashstate = None |
|
634 | 634 | return |
|
635 | 635 | self.hashstate = hashstate.fromui(self.ui) |
|
636 | 636 | self.address = _hashaddress(self.address, self.hashstate.confighash) |
|
637 | 637 | |
|
638 | 638 | def _checkextensions(self): |
|
639 | 639 | if not self.hashstate: |
|
640 | 640 | return |
|
641 | 641 | if extensions.notloaded(): |
|
642 | 642 | # one or more extensions failed to load. mtimehash becomes |
|
643 | 643 | # meaningless because we do not know the paths of those extensions. |
|
644 | 644 | # set mtimehash to an illegal hash value to invalidate the server. |
|
645 | 645 | self.hashstate.mtimehash = '' |
|
646 | 646 | |
|
647 | 647 | def _createsymlink(self): |
|
648 | 648 | if self.baseaddress == self.address: |
|
649 | 649 | return |
|
650 | 650 | tempaddress = _tempaddress(self.baseaddress) |
|
651 | 651 | os.symlink(os.path.basename(self.address), tempaddress) |
|
652 | 652 | util.rename(tempaddress, self.baseaddress) |
|
653 | 653 | |
|
654 |
def |
|
|
655 | try: | |
|
656 | self.server.serve_forever() | |
|
657 | finally: | |
|
658 | self.server.unlinksocketfile() | |
|
654 | def _cleanup(self): | |
|
655 | self.server.unlinksocketfile() | |
|
659 | 656 | |
|
660 | 657 | def uisetup(ui): |
|
661 | 658 | commandserver._servicemap['chgunix'] = chgunixservice |
|
662 | 659 | |
|
663 | 660 | # CHGINTERNALMARK is temporarily set by chg client to detect if chg will |
|
664 | 661 | # start another chg. drop it to avoid possible side effects. |
|
665 | 662 | if 'CHGINTERNALMARK' in os.environ: |
|
666 | 663 | del os.environ['CHGINTERNALMARK'] |
@@ -1,422 +1,425 b'' | |||
|
1 | 1 | # commandserver.py - communicate with Mercurial's API over a pipe |
|
2 | 2 | # |
|
3 | 3 | # Copyright Matt Mackall <mpm@selenic.com> |
|
4 | 4 | # |
|
5 | 5 | # This software may be used and distributed according to the terms of the |
|
6 | 6 | # GNU General Public License version 2 or any later version. |
|
7 | 7 | |
|
8 | 8 | from __future__ import absolute_import |
|
9 | 9 | |
|
10 | 10 | import errno |
|
11 | 11 | import gc |
|
12 | 12 | import os |
|
13 | 13 | import random |
|
14 | 14 | import struct |
|
15 | 15 | import sys |
|
16 | 16 | import traceback |
|
17 | 17 | |
|
18 | 18 | from .i18n import _ |
|
19 | 19 | from . import ( |
|
20 | 20 | encoding, |
|
21 | 21 | error, |
|
22 | 22 | util, |
|
23 | 23 | ) |
|
24 | 24 | |
|
25 | 25 | socketserver = util.socketserver |
|
26 | 26 | |
|
27 | 27 | logfile = None |
|
28 | 28 | |
|
29 | 29 | def log(*args): |
|
30 | 30 | if not logfile: |
|
31 | 31 | return |
|
32 | 32 | |
|
33 | 33 | for a in args: |
|
34 | 34 | logfile.write(str(a)) |
|
35 | 35 | |
|
36 | 36 | logfile.flush() |
|
37 | 37 | |
|
38 | 38 | class channeledoutput(object): |
|
39 | 39 | """ |
|
40 | 40 | Write data to out in the following format: |
|
41 | 41 | |
|
42 | 42 | data length (unsigned int), |
|
43 | 43 | data |
|
44 | 44 | """ |
|
45 | 45 | def __init__(self, out, channel): |
|
46 | 46 | self.out = out |
|
47 | 47 | self.channel = channel |
|
48 | 48 | |
|
49 | 49 | @property |
|
50 | 50 | def name(self): |
|
51 | 51 | return '<%c-channel>' % self.channel |
|
52 | 52 | |
|
53 | 53 | def write(self, data): |
|
54 | 54 | if not data: |
|
55 | 55 | return |
|
56 | 56 | self.out.write(struct.pack('>cI', self.channel, len(data))) |
|
57 | 57 | self.out.write(data) |
|
58 | 58 | self.out.flush() |
|
59 | 59 | |
|
60 | 60 | def __getattr__(self, attr): |
|
61 | 61 | if attr in ('isatty', 'fileno', 'tell', 'seek'): |
|
62 | 62 | raise AttributeError(attr) |
|
63 | 63 | return getattr(self.out, attr) |
|
64 | 64 | |
|
65 | 65 | class channeledinput(object): |
|
66 | 66 | """ |
|
67 | 67 | Read data from in_. |
|
68 | 68 | |
|
69 | 69 | Requests for input are written to out in the following format: |
|
70 | 70 | channel identifier - 'I' for plain input, 'L' line based (1 byte) |
|
71 | 71 | how many bytes to send at most (unsigned int), |
|
72 | 72 | |
|
73 | 73 | The client replies with: |
|
74 | 74 | data length (unsigned int), 0 meaning EOF |
|
75 | 75 | data |
|
76 | 76 | """ |
|
77 | 77 | |
|
78 | 78 | maxchunksize = 4 * 1024 |
|
79 | 79 | |
|
80 | 80 | def __init__(self, in_, out, channel): |
|
81 | 81 | self.in_ = in_ |
|
82 | 82 | self.out = out |
|
83 | 83 | self.channel = channel |
|
84 | 84 | |
|
85 | 85 | @property |
|
86 | 86 | def name(self): |
|
87 | 87 | return '<%c-channel>' % self.channel |
|
88 | 88 | |
|
89 | 89 | def read(self, size=-1): |
|
90 | 90 | if size < 0: |
|
91 | 91 | # if we need to consume all the clients input, ask for 4k chunks |
|
92 | 92 | # so the pipe doesn't fill up risking a deadlock |
|
93 | 93 | size = self.maxchunksize |
|
94 | 94 | s = self._read(size, self.channel) |
|
95 | 95 | buf = s |
|
96 | 96 | while s: |
|
97 | 97 | s = self._read(size, self.channel) |
|
98 | 98 | buf += s |
|
99 | 99 | |
|
100 | 100 | return buf |
|
101 | 101 | else: |
|
102 | 102 | return self._read(size, self.channel) |
|
103 | 103 | |
|
104 | 104 | def _read(self, size, channel): |
|
105 | 105 | if not size: |
|
106 | 106 | return '' |
|
107 | 107 | assert size > 0 |
|
108 | 108 | |
|
109 | 109 | # tell the client we need at most size bytes |
|
110 | 110 | self.out.write(struct.pack('>cI', channel, size)) |
|
111 | 111 | self.out.flush() |
|
112 | 112 | |
|
113 | 113 | length = self.in_.read(4) |
|
114 | 114 | length = struct.unpack('>I', length)[0] |
|
115 | 115 | if not length: |
|
116 | 116 | return '' |
|
117 | 117 | else: |
|
118 | 118 | return self.in_.read(length) |
|
119 | 119 | |
|
120 | 120 | def readline(self, size=-1): |
|
121 | 121 | if size < 0: |
|
122 | 122 | size = self.maxchunksize |
|
123 | 123 | s = self._read(size, 'L') |
|
124 | 124 | buf = s |
|
125 | 125 | # keep asking for more until there's either no more or |
|
126 | 126 | # we got a full line |
|
127 | 127 | while s and s[-1] != '\n': |
|
128 | 128 | s = self._read(size, 'L') |
|
129 | 129 | buf += s |
|
130 | 130 | |
|
131 | 131 | return buf |
|
132 | 132 | else: |
|
133 | 133 | return self._read(size, 'L') |
|
134 | 134 | |
|
135 | 135 | def __iter__(self): |
|
136 | 136 | return self |
|
137 | 137 | |
|
138 | 138 | def next(self): |
|
139 | 139 | l = self.readline() |
|
140 | 140 | if not l: |
|
141 | 141 | raise StopIteration |
|
142 | 142 | return l |
|
143 | 143 | |
|
144 | 144 | def __getattr__(self, attr): |
|
145 | 145 | if attr in ('isatty', 'fileno', 'tell', 'seek'): |
|
146 | 146 | raise AttributeError(attr) |
|
147 | 147 | return getattr(self.in_, attr) |
|
148 | 148 | |
|
149 | 149 | class server(object): |
|
150 | 150 | """ |
|
151 | 151 | Listens for commands on fin, runs them and writes the output on a channel |
|
152 | 152 | based stream to fout. |
|
153 | 153 | """ |
|
154 | 154 | def __init__(self, ui, repo, fin, fout): |
|
155 | 155 | self.cwd = os.getcwd() |
|
156 | 156 | |
|
157 | 157 | # developer config: cmdserver.log |
|
158 | 158 | logpath = ui.config("cmdserver", "log", None) |
|
159 | 159 | if logpath: |
|
160 | 160 | global logfile |
|
161 | 161 | if logpath == '-': |
|
162 | 162 | # write log on a special 'd' (debug) channel |
|
163 | 163 | logfile = channeledoutput(fout, 'd') |
|
164 | 164 | else: |
|
165 | 165 | logfile = open(logpath, 'a') |
|
166 | 166 | |
|
167 | 167 | if repo: |
|
168 | 168 | # the ui here is really the repo ui so take its baseui so we don't |
|
169 | 169 | # end up with its local configuration |
|
170 | 170 | self.ui = repo.baseui |
|
171 | 171 | self.repo = repo |
|
172 | 172 | self.repoui = repo.ui |
|
173 | 173 | else: |
|
174 | 174 | self.ui = ui |
|
175 | 175 | self.repo = self.repoui = None |
|
176 | 176 | |
|
177 | 177 | self.cerr = channeledoutput(fout, 'e') |
|
178 | 178 | self.cout = channeledoutput(fout, 'o') |
|
179 | 179 | self.cin = channeledinput(fin, fout, 'I') |
|
180 | 180 | self.cresult = channeledoutput(fout, 'r') |
|
181 | 181 | |
|
182 | 182 | self.client = fin |
|
183 | 183 | |
|
184 | 184 | def cleanup(self): |
|
185 | 185 | """release and restore resources taken during server session""" |
|
186 | 186 | pass |
|
187 | 187 | |
|
188 | 188 | def _read(self, size): |
|
189 | 189 | if not size: |
|
190 | 190 | return '' |
|
191 | 191 | |
|
192 | 192 | data = self.client.read(size) |
|
193 | 193 | |
|
194 | 194 | # is the other end closed? |
|
195 | 195 | if not data: |
|
196 | 196 | raise EOFError |
|
197 | 197 | |
|
198 | 198 | return data |
|
199 | 199 | |
|
200 | 200 | def _readstr(self): |
|
201 | 201 | """read a string from the channel |
|
202 | 202 | |
|
203 | 203 | format: |
|
204 | 204 | data length (uint32), data |
|
205 | 205 | """ |
|
206 | 206 | length = struct.unpack('>I', self._read(4))[0] |
|
207 | 207 | if not length: |
|
208 | 208 | return '' |
|
209 | 209 | return self._read(length) |
|
210 | 210 | |
|
211 | 211 | def _readlist(self): |
|
212 | 212 | """read a list of NULL separated strings from the channel""" |
|
213 | 213 | s = self._readstr() |
|
214 | 214 | if s: |
|
215 | 215 | return s.split('\0') |
|
216 | 216 | else: |
|
217 | 217 | return [] |
|
218 | 218 | |
|
219 | 219 | def runcommand(self): |
|
220 | 220 | """ reads a list of \0 terminated arguments, executes |
|
221 | 221 | and writes the return code to the result channel """ |
|
222 | 222 | from . import dispatch # avoid cycle |
|
223 | 223 | |
|
224 | 224 | args = self._readlist() |
|
225 | 225 | |
|
226 | 226 | # copy the uis so changes (e.g. --config or --verbose) don't |
|
227 | 227 | # persist between requests |
|
228 | 228 | copiedui = self.ui.copy() |
|
229 | 229 | uis = [copiedui] |
|
230 | 230 | if self.repo: |
|
231 | 231 | self.repo.baseui = copiedui |
|
232 | 232 | # clone ui without using ui.copy because this is protected |
|
233 | 233 | repoui = self.repoui.__class__(self.repoui) |
|
234 | 234 | repoui.copy = copiedui.copy # redo copy protection |
|
235 | 235 | uis.append(repoui) |
|
236 | 236 | self.repo.ui = self.repo.dirstate._ui = repoui |
|
237 | 237 | self.repo.invalidateall() |
|
238 | 238 | |
|
239 | 239 | for ui in uis: |
|
240 | 240 | ui.resetstate() |
|
241 | 241 | # any kind of interaction must use server channels, but chg may |
|
242 | 242 | # replace channels by fully functional tty files. so nontty is |
|
243 | 243 | # enforced only if cin is a channel. |
|
244 | 244 | if not util.safehasattr(self.cin, 'fileno'): |
|
245 | 245 | ui.setconfig('ui', 'nontty', 'true', 'commandserver') |
|
246 | 246 | |
|
247 | 247 | req = dispatch.request(args[:], copiedui, self.repo, self.cin, |
|
248 | 248 | self.cout, self.cerr) |
|
249 | 249 | |
|
250 | 250 | ret = (dispatch.dispatch(req) or 0) & 255 # might return None |
|
251 | 251 | |
|
252 | 252 | # restore old cwd |
|
253 | 253 | if '--cwd' in args: |
|
254 | 254 | os.chdir(self.cwd) |
|
255 | 255 | |
|
256 | 256 | self.cresult.write(struct.pack('>i', int(ret))) |
|
257 | 257 | |
|
258 | 258 | def getencoding(self): |
|
259 | 259 | """ writes the current encoding to the result channel """ |
|
260 | 260 | self.cresult.write(encoding.encoding) |
|
261 | 261 | |
|
262 | 262 | def serveone(self): |
|
263 | 263 | cmd = self.client.readline()[:-1] |
|
264 | 264 | if cmd: |
|
265 | 265 | handler = self.capabilities.get(cmd) |
|
266 | 266 | if handler: |
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267 | 267 | handler(self) |
|
268 | 268 | else: |
|
269 | 269 | # clients are expected to check what commands are supported by |
|
270 | 270 | # looking at the servers capabilities |
|
271 | 271 | raise error.Abort(_('unknown command %s') % cmd) |
|
272 | 272 | |
|
273 | 273 | return cmd != '' |
|
274 | 274 | |
|
275 | 275 | capabilities = {'runcommand' : runcommand, |
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276 | 276 | 'getencoding' : getencoding} |
|
277 | 277 | |
|
278 | 278 | def serve(self): |
|
279 | 279 | hellomsg = 'capabilities: ' + ' '.join(sorted(self.capabilities)) |
|
280 | 280 | hellomsg += '\n' |
|
281 | 281 | hellomsg += 'encoding: ' + encoding.encoding |
|
282 | 282 | hellomsg += '\n' |
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283 | 283 | hellomsg += 'pid: %d' % util.getpid() |
|
284 | 284 | |
|
285 | 285 | # write the hello msg in -one- chunk |
|
286 | 286 | self.cout.write(hellomsg) |
|
287 | 287 | |
|
288 | 288 | try: |
|
289 | 289 | while self.serveone(): |
|
290 | 290 | pass |
|
291 | 291 | except EOFError: |
|
292 | 292 | # we'll get here if the client disconnected while we were reading |
|
293 | 293 | # its request |
|
294 | 294 | return 1 |
|
295 | 295 | |
|
296 | 296 | return 0 |
|
297 | 297 | |
|
298 | 298 | def _protectio(ui): |
|
299 | 299 | """ duplicates streams and redirect original to null if ui uses stdio """ |
|
300 | 300 | ui.flush() |
|
301 | 301 | newfiles = [] |
|
302 | 302 | nullfd = os.open(os.devnull, os.O_RDWR) |
|
303 | 303 | for f, sysf, mode in [(ui.fin, sys.stdin, 'rb'), |
|
304 | 304 | (ui.fout, sys.stdout, 'wb')]: |
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305 | 305 | if f is sysf: |
|
306 | 306 | newfd = os.dup(f.fileno()) |
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307 | 307 | os.dup2(nullfd, f.fileno()) |
|
308 | 308 | f = os.fdopen(newfd, mode) |
|
309 | 309 | newfiles.append(f) |
|
310 | 310 | os.close(nullfd) |
|
311 | 311 | return tuple(newfiles) |
|
312 | 312 | |
|
313 | 313 | def _restoreio(ui, fin, fout): |
|
314 | 314 | """ restores streams from duplicated ones """ |
|
315 | 315 | ui.flush() |
|
316 | 316 | for f, uif in [(fin, ui.fin), (fout, ui.fout)]: |
|
317 | 317 | if f is not uif: |
|
318 | 318 | os.dup2(f.fileno(), uif.fileno()) |
|
319 | 319 | f.close() |
|
320 | 320 | |
|
321 | 321 | class pipeservice(object): |
|
322 | 322 | def __init__(self, ui, repo, opts): |
|
323 | 323 | self.ui = ui |
|
324 | 324 | self.repo = repo |
|
325 | 325 | |
|
326 | 326 | def init(self): |
|
327 | 327 | pass |
|
328 | 328 | |
|
329 | 329 | def run(self): |
|
330 | 330 | ui = self.ui |
|
331 | 331 | # redirect stdio to null device so that broken extensions or in-process |
|
332 | 332 | # hooks will never cause corruption of channel protocol. |
|
333 | 333 | fin, fout = _protectio(ui) |
|
334 | 334 | try: |
|
335 | 335 | sv = server(ui, self.repo, fin, fout) |
|
336 | 336 | return sv.serve() |
|
337 | 337 | finally: |
|
338 | 338 | sv.cleanup() |
|
339 | 339 | _restoreio(ui, fin, fout) |
|
340 | 340 | |
|
341 | 341 | class _requesthandler(socketserver.StreamRequestHandler): |
|
342 | 342 | def handle(self): |
|
343 | 343 | # use a different process group from the master process, making this |
|
344 | 344 | # process pass kernel "is_current_pgrp_orphaned" check so signals like |
|
345 | 345 | # SIGTSTP, SIGTTIN, SIGTTOU are not ignored. |
|
346 | 346 | os.setpgid(0, 0) |
|
347 | 347 | # change random state otherwise forked request handlers would have a |
|
348 | 348 | # same state inherited from parent. |
|
349 | 349 | random.seed() |
|
350 | 350 | ui = self.server.ui |
|
351 | 351 | sv = None |
|
352 | 352 | try: |
|
353 | 353 | sv = self._createcmdserver() |
|
354 | 354 | try: |
|
355 | 355 | sv.serve() |
|
356 | 356 | # handle exceptions that may be raised by command server. most of |
|
357 | 357 | # known exceptions are caught by dispatch. |
|
358 | 358 | except error.Abort as inst: |
|
359 | 359 | ui.warn(_('abort: %s\n') % inst) |
|
360 | 360 | except IOError as inst: |
|
361 | 361 | if inst.errno != errno.EPIPE: |
|
362 | 362 | raise |
|
363 | 363 | except KeyboardInterrupt: |
|
364 | 364 | pass |
|
365 | 365 | finally: |
|
366 | 366 | sv.cleanup() |
|
367 | 367 | except: # re-raises |
|
368 | 368 | # also write traceback to error channel. otherwise client cannot |
|
369 | 369 | # see it because it is written to server's stderr by default. |
|
370 | 370 | if sv: |
|
371 | 371 | cerr = sv.cerr |
|
372 | 372 | else: |
|
373 | 373 | cerr = channeledoutput(self.wfile, 'e') |
|
374 | 374 | traceback.print_exc(file=cerr) |
|
375 | 375 | raise |
|
376 | 376 | finally: |
|
377 | 377 | # trigger __del__ since ForkingMixIn uses os._exit |
|
378 | 378 | gc.collect() |
|
379 | 379 | |
|
380 | 380 | def _createcmdserver(self): |
|
381 | 381 | ui = self.server.ui |
|
382 | 382 | repo = self.server.repo |
|
383 | 383 | return server(ui, repo, self.rfile, self.wfile) |
|
384 | 384 | |
|
385 | 385 | class unixservice(object): |
|
386 | 386 | """ |
|
387 | 387 | Listens on unix domain socket and forks server per connection |
|
388 | 388 | """ |
|
389 | 389 | def __init__(self, ui, repo, opts): |
|
390 | 390 | self.ui = ui |
|
391 | 391 | self.repo = repo |
|
392 | 392 | self.address = opts['address'] |
|
393 | 393 | if not util.safehasattr(socketserver, 'UnixStreamServer'): |
|
394 | 394 | raise error.Abort(_('unsupported platform')) |
|
395 | 395 | if not self.address: |
|
396 | 396 | raise error.Abort(_('no socket path specified with --address')) |
|
397 | 397 | |
|
398 | 398 | def init(self): |
|
399 | 399 | class cls(socketserver.ForkingMixIn, socketserver.UnixStreamServer): |
|
400 | 400 | ui = self.ui |
|
401 | 401 | repo = self.repo |
|
402 | 402 | self.server = cls(self.address, _requesthandler) |
|
403 | 403 | self.ui.status(_('listening at %s\n') % self.address) |
|
404 | 404 | self.ui.flush() # avoid buffering of status message |
|
405 | 405 | |
|
406 | def _cleanup(self): | |
|
407 | os.unlink(self.address) | |
|
408 | ||
|
406 | 409 | def run(self): |
|
407 | 410 | try: |
|
408 | 411 | self.server.serve_forever() |
|
409 | 412 | finally: |
|
410 |
|
|
|
413 | self._cleanup() | |
|
411 | 414 | |
|
412 | 415 | _servicemap = { |
|
413 | 416 | 'pipe': pipeservice, |
|
414 | 417 | 'unix': unixservice, |
|
415 | 418 | } |
|
416 | 419 | |
|
417 | 420 | def createservice(ui, repo, opts): |
|
418 | 421 | mode = opts['cmdserver'] |
|
419 | 422 | try: |
|
420 | 423 | return _servicemap[mode](ui, repo, opts) |
|
421 | 424 | except KeyError: |
|
422 | 425 | raise error.Abort(_('unknown mode %s') % mode) |
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