Mercurial > hg
annotate mercurial/error.py @ 23324:69f86b937035
cmdserver: protect pipe server streams against corruption caused by direct io
Because pipe-mode server uses stdio as IPC channel, other modules should not
touch stdio directly and use ui instead. However, this strategy is brittle
because several Python functions read and write stdio implicitly.
print 'hello' # should use ui.write()
# => ch = 'h', size = 1701604463 'ello', data = '\n'
This patch adds protection for such mistakes. Both stdio files and low-level
file descriptors are redirected to /dev/null while command server uses them.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sat, 15 Nov 2014 13:50:43 +0900 |
parents | 2bd51e61c65e |
children | cdbb85489c41 |
rev | line source |
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1 # error.py - Mercurial exceptions |
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2 # |
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3 # Copyright 2005-2008 Matt Mackall <mpm@selenic.com> |
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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. |
7633 | 7 |
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8 """Mercurial exceptions. |
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9 |
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10 This allows us to catch exceptions at higher levels without forcing |
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11 imports. |
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12 """ |
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13 |
7633 | 14 # Do not import anything here, please |
15 | |
16 class RevlogError(Exception): | |
17 pass | |
18 | |
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19 class FilteredIndexError(IndexError): |
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20 pass |
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21 |
7633 | 22 class LookupError(RevlogError, KeyError): |
23 def __init__(self, name, index, message): | |
24 self.name = name | |
25 if isinstance(name, str) and len(name) == 20: | |
26 from node import short | |
27 name = short(name) | |
28 RevlogError.__init__(self, '%s@%s: %s' % (index, name, message)) | |
29 | |
30 def __str__(self): | |
31 return RevlogError.__str__(self) | |
7636 | 32 |
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33 class FilteredLookupError(LookupError): |
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34 pass |
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35 |
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36 class ManifestLookupError(LookupError): |
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37 pass |
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38 |
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39 class CommandError(Exception): |
7636 | 40 """Exception raised on errors in parsing the command line.""" |
7637 | 41 |
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42 class InterventionRequired(Exception): |
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43 """Exception raised when a command requires human intervention.""" |
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44 |
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45 class Abort(Exception): |
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46 """Raised if a command needs to print an error and exit.""" |
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47 def __init__(self, *args, **kw): |
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48 Exception.__init__(self, *args) |
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49 self.hint = kw.get('hint') |
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50 |
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51 class ConfigError(Abort): |
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52 """Exception raised when parsing config files""" |
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53 |
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54 class OutOfBandError(Exception): |
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55 """Exception raised when a remote repo reports failure""" |
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56 |
11292 | 57 class ParseError(Exception): |
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58 """Exception raised when parsing config files (msg[, pos])""" |
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59 |
7637 | 60 class RepoError(Exception): |
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61 def __init__(self, *args, **kw): |
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62 Exception.__init__(self, *args) |
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63 self.hint = kw.get('hint') |
7637 | 64 |
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65 class RepoLookupError(RepoError): |
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66 pass |
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67 |
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68 class FilteredRepoLookupError(RepoLookupError): |
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69 pass |
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70 |
7637 | 71 class CapabilityError(RepoError): |
72 pass | |
7640 | 73 |
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74 class RequirementError(RepoError): |
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75 """Exception raised if .hg/requires has an unknown entry.""" |
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76 pass |
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77 |
7640 | 78 class LockError(IOError): |
79 def __init__(self, errno, strerror, filename, desc): | |
80 IOError.__init__(self, errno, strerror, filename) | |
81 self.desc = desc | |
82 | |
83 class LockHeld(LockError): | |
84 def __init__(self, errno, filename, desc, locker): | |
85 LockError.__init__(self, errno, 'Lock held', filename, desc) | |
86 self.locker = locker | |
87 | |
88 class LockUnavailable(LockError): | |
89 pass | |
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90 |
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91 class ResponseError(Exception): |
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92 """Raised to print an error with part of output and exit.""" |
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93 |
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94 class UnknownCommand(Exception): |
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95 """Exception raised if command is not in the command table.""" |
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96 |
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97 class AmbiguousCommand(Exception): |
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98 """Exception raised if command shortcut matches more than one command.""" |
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99 |
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100 # derived from KeyboardInterrupt to simplify some breakout code |
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101 class SignalInterrupt(KeyboardInterrupt): |
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102 """Exception raised on SIGTERM and SIGHUP.""" |
7646 | 103 |
104 class SignatureError(Exception): | |
105 pass | |
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106 |
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107 class PushRaced(RuntimeError): |
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108 """An exception raised during unbundling that indicate a push race""" |
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109 |
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110 # bundle2 related errors |
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111 class BundleValueError(ValueError): |
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112 """error raised when bundle2 cannot be processed""" |
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113 |
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114 class UnsupportedPartError(BundleValueError): |
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115 def __init__(self, parttype=None, params=()): |
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116 self.parttype = parttype |
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117 self.params = params |
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118 if self.parttype is None: |
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119 msg = 'Stream Parameter' |
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120 else: |
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121 msg = parttype |
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122 if self.params: |
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123 msg = '%s - %s' % (msg, ', '.join(self.params)) |
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124 ValueError.__init__(self, msg) |
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125 |
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126 class ReadOnlyPartError(RuntimeError): |
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127 """error raised when code tries to alter a part being generated""" |
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128 pass |
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129 |
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130 class CensoredNodeError(RevlogError): |
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131 """error raised when content verification fails on a censored node""" |
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132 |
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133 def __init__(self, filename, node): |
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134 from node import short |
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135 RevlogError.__init__(self, '%s:%s' % (filename, short(node))) |