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@@ -1,206 +1,214 b'' | |||
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1 | 1 | from __future__ import absolute_import |
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2 | 2 | |
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3 | 3 | import errno |
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4 | 4 | import os |
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5 | 5 | import posixpath |
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6 | 6 | import stat |
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7 | 7 | |
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8 | 8 | from .i18n import _ |
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9 | 9 | from . import ( |
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10 | 10 | encoding, |
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11 | 11 | error, |
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12 | 12 | util, |
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13 | 13 | ) |
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14 | 14 | |
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15 | 15 | def _lowerclean(s): |
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16 | 16 | return encoding.hfsignoreclean(s.lower()) |
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17 | 17 | |
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18 | 18 | class pathauditor(object): |
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19 | 19 | '''ensure that a filesystem path contains no banned components. |
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20 | 20 | the following properties of a path are checked: |
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21 | 21 | |
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22 | 22 | - ends with a directory separator |
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23 | 23 | - under top-level .hg |
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24 | 24 | - starts at the root of a windows drive |
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25 | 25 | - contains ".." |
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26 | ||
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27 | More check are also done about the file system states: | |
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26 | 28 | - traverses a symlink (e.g. a/symlink_here/b) |
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27 | 29 | - inside a nested repository (a callback can be used to approve |
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28 | 30 | some nested repositories, e.g., subrepositories) |
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31 | ||
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32 | The file system checks are only done when 'realfs' is set to True (the | |
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33 | default). They should be disable then we are auditing path for operation on | |
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34 | stored history. | |
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29 | 35 | ''' |
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30 | 36 | |
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31 | def __init__(self, root, callback=None): | |
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37 | def __init__(self, root, callback=None, realfs=True): | |
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32 | 38 | self.audited = set() |
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33 | 39 | self.auditeddir = set() |
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34 | 40 | self.root = root |
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41 | self._realfs = realfs | |
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35 | 42 | self.callback = callback |
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36 | 43 | if os.path.lexists(root) and not util.checkcase(root): |
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37 | 44 | self.normcase = util.normcase |
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38 | 45 | else: |
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39 | 46 | self.normcase = lambda x: x |
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40 | 47 | |
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41 | 48 | def __call__(self, path): |
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42 | 49 | '''Check the relative path. |
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43 | 50 | path may contain a pattern (e.g. foodir/**.txt)''' |
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44 | 51 | |
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45 | 52 | path = util.localpath(path) |
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46 | 53 | normpath = self.normcase(path) |
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47 | 54 | if normpath in self.audited: |
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48 | 55 | return |
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49 | 56 | # AIX ignores "/" at end of path, others raise EISDIR. |
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50 | 57 | if util.endswithsep(path): |
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51 | 58 | raise error.Abort(_("path ends in directory separator: %s") % path) |
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52 | 59 | parts = util.splitpath(path) |
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53 | 60 | if (os.path.splitdrive(path)[0] |
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54 | 61 | or _lowerclean(parts[0]) in ('.hg', '.hg.', '') |
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55 | 62 | or os.pardir in parts): |
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56 | 63 | raise error.Abort(_("path contains illegal component: %s") % path) |
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57 | 64 | # Windows shortname aliases |
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58 | 65 | for p in parts: |
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59 | 66 | if "~" in p: |
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60 | 67 | first, last = p.split("~", 1) |
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61 | 68 | if last.isdigit() and first.upper() in ["HG", "HG8B6C"]: |
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62 | 69 | raise error.Abort(_("path contains illegal component: %s") |
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63 | 70 | % path) |
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64 | 71 | if '.hg' in _lowerclean(path): |
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65 | 72 | lparts = [_lowerclean(p.lower()) for p in parts] |
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66 | 73 | for p in '.hg', '.hg.': |
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67 | 74 | if p in lparts[1:]: |
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68 | 75 | pos = lparts.index(p) |
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69 | 76 | base = os.path.join(*parts[:pos]) |
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70 | 77 | raise error.Abort(_("path '%s' is inside nested repo %r") |
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71 | 78 | % (path, base)) |
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72 | 79 | |
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73 | 80 | normparts = util.splitpath(normpath) |
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74 | 81 | assert len(parts) == len(normparts) |
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75 | 82 | |
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76 | 83 | parts.pop() |
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77 | 84 | normparts.pop() |
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78 | 85 | prefixes = [] |
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79 | 86 | while parts: |
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80 | 87 | prefix = os.sep.join(parts) |
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81 | 88 | normprefix = os.sep.join(normparts) |
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82 | 89 | if normprefix in self.auditeddir: |
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83 | 90 | break |
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84 |
self._ |
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91 | if self._realfs: | |
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92 | self._checkfs(prefix, path) | |
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85 | 93 | prefixes.append(normprefix) |
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86 | 94 | parts.pop() |
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87 | 95 | normparts.pop() |
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88 | 96 | |
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89 | 97 | self.audited.add(normpath) |
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90 | 98 | # only add prefixes to the cache after checking everything: we don't |
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91 | 99 | # want to add "foo/bar/baz" before checking if there's a "foo/.hg" |
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92 | 100 | self.auditeddir.update(prefixes) |
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93 | 101 | |
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94 | 102 | def _checkfs(self, prefix, path): |
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95 | 103 | """raise exception if a file system backed check fails""" |
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96 | 104 | curpath = os.path.join(self.root, prefix) |
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97 | 105 | try: |
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98 | 106 | st = os.lstat(curpath) |
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99 | 107 | except OSError as err: |
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100 | 108 | # EINVAL can be raised as invalid path syntax under win32. |
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101 | 109 | # They must be ignored for patterns can be checked too. |
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102 | 110 | if err.errno not in (errno.ENOENT, errno.ENOTDIR, errno.EINVAL): |
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103 | 111 | raise |
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104 | 112 | else: |
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105 | 113 | if stat.S_ISLNK(st.st_mode): |
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106 | 114 | raise error.Abort( |
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107 | 115 | _('path %r traverses symbolic link %r') |
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108 | 116 | % (path, prefix)) |
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109 | 117 | elif (stat.S_ISDIR(st.st_mode) and |
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110 | 118 | os.path.isdir(os.path.join(curpath, '.hg'))): |
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111 | 119 | if not self.callback or not self.callback(curpath): |
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112 | 120 | raise error.Abort(_("path '%s' is inside nested " |
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113 | 121 | "repo %r") % (path, prefix)) |
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114 | 122 | |
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115 | 123 | def check(self, path): |
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116 | 124 | try: |
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117 | 125 | self(path) |
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118 | 126 | return True |
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119 | 127 | except (OSError, error.Abort): |
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120 | 128 | return False |
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121 | 129 | |
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122 | 130 | def canonpath(root, cwd, myname, auditor=None): |
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123 | 131 | '''return the canonical path of myname, given cwd and root''' |
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124 | 132 | if util.endswithsep(root): |
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125 | 133 | rootsep = root |
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126 | 134 | else: |
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127 | 135 | rootsep = root + os.sep |
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128 | 136 | name = myname |
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129 | 137 | if not os.path.isabs(name): |
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130 | 138 | name = os.path.join(root, cwd, name) |
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131 | 139 | name = os.path.normpath(name) |
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132 | 140 | if auditor is None: |
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133 | 141 | auditor = pathauditor(root) |
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134 | 142 | if name != rootsep and name.startswith(rootsep): |
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135 | 143 | name = name[len(rootsep):] |
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136 | 144 | auditor(name) |
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137 | 145 | return util.pconvert(name) |
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138 | 146 | elif name == root: |
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139 | 147 | return '' |
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140 | 148 | else: |
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141 | 149 | # Determine whether `name' is in the hierarchy at or beneath `root', |
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142 | 150 | # by iterating name=dirname(name) until that causes no change (can't |
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143 | 151 | # check name == '/', because that doesn't work on windows). The list |
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144 | 152 | # `rel' holds the reversed list of components making up the relative |
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145 | 153 | # file name we want. |
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146 | 154 | rel = [] |
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147 | 155 | while True: |
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148 | 156 | try: |
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149 | 157 | s = util.samefile(name, root) |
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150 | 158 | except OSError: |
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151 | 159 | s = False |
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152 | 160 | if s: |
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153 | 161 | if not rel: |
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154 | 162 | # name was actually the same as root (maybe a symlink) |
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155 | 163 | return '' |
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156 | 164 | rel.reverse() |
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157 | 165 | name = os.path.join(*rel) |
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158 | 166 | auditor(name) |
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159 | 167 | return util.pconvert(name) |
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160 | 168 | dirname, basename = util.split(name) |
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161 | 169 | rel.append(basename) |
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162 | 170 | if dirname == name: |
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163 | 171 | break |
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164 | 172 | name = dirname |
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165 | 173 | |
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166 | 174 | # A common mistake is to use -R, but specify a file relative to the repo |
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167 | 175 | # instead of cwd. Detect that case, and provide a hint to the user. |
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168 | 176 | hint = None |
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169 | 177 | try: |
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170 | 178 | if cwd != root: |
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171 | 179 | canonpath(root, root, myname, auditor) |
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172 | 180 | hint = (_("consider using '--cwd %s'") |
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173 | 181 | % os.path.relpath(root, cwd)) |
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174 | 182 | except error.Abort: |
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175 | 183 | pass |
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176 | 184 | |
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177 | 185 | raise error.Abort(_("%s not under root '%s'") % (myname, root), |
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178 | 186 | hint=hint) |
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179 | 187 | |
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180 | 188 | def normasprefix(path): |
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181 | 189 | '''normalize the specified path as path prefix |
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182 | 190 | |
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183 | 191 | Returned value can be used safely for "p.startswith(prefix)", |
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184 | 192 | "p[len(prefix):]", and so on. |
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185 | 193 | |
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186 | 194 | For efficiency, this expects "path" argument to be already |
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187 | 195 | normalized by "os.path.normpath", "os.path.realpath", and so on. |
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188 | 196 | |
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189 | 197 | See also issue3033 for detail about need of this function. |
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190 | 198 | |
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191 | 199 | >>> normasprefix('/foo/bar').replace(os.sep, '/') |
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192 | 200 | '/foo/bar/' |
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193 | 201 | >>> normasprefix('/').replace(os.sep, '/') |
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194 | 202 | '/' |
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195 | 203 | ''' |
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196 | 204 | d, p = os.path.splitdrive(path) |
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197 | 205 | if len(p) != len(os.sep): |
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198 | 206 | return path + os.sep |
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199 | 207 | else: |
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200 | 208 | return path |
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201 | 209 | |
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202 | 210 | # forward two methods from posixpath that do what we need, but we'd |
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203 | 211 | # rather not let our internals know that we're thinking in posix terms |
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204 | 212 | # - instead we'll let them be oblivious. |
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205 | 213 | join = posixpath.join |
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206 | 214 | dirname = posixpath.dirname |
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