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@@ -7,8 +7,12 b'' | |||
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7 | 7 | |
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8 | 8 | from __future__ import absolute_import |
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9 | 9 | |
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10 | import ctypes | |
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11 | import ctypes.util | |
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10 | 12 | import os |
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13 | import socket | |
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11 | 14 | import stat as statmod |
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15 | import sys | |
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12 | 16 | |
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13 | 17 | def _mode_to_kind(mode): |
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14 | 18 | if statmod.S_ISREG(mode): |
@@ -59,8 +63,87 b' def listdir(path, stat=False, skip=None)' | |||
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59 | 63 | |
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60 | 64 | if os.name != 'nt': |
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61 | 65 | posixfile = open |
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66 | ||
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67 | _SCM_RIGHTS = 0x01 | |
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68 | _socklen_t = ctypes.c_uint | |
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69 | ||
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70 | if sys.platform == 'linux2': | |
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71 | # socket.h says "the type should be socklen_t but the definition of | |
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72 | # the kernel is incompatible with this." | |
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73 | _cmsg_len_t = ctypes.c_size_t | |
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74 | _msg_controllen_t = ctypes.c_size_t | |
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75 | _msg_iovlen_t = ctypes.c_size_t | |
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76 | else: | |
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77 | _cmsg_len_t = _socklen_t | |
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78 | _msg_controllen_t = _socklen_t | |
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79 | _msg_iovlen_t = ctypes.c_int | |
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80 | ||
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81 | class _iovec(ctypes.Structure): | |
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82 | _fields_ = [ | |
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83 | ('iov_base', ctypes.c_void_p), | |
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84 | ('iov_len', ctypes.c_size_t), | |
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85 | ] | |
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86 | ||
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87 | class _msghdr(ctypes.Structure): | |
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88 | _fields_ = [ | |
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89 | ('msg_name', ctypes.c_void_p), | |
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90 | ('msg_namelen', _socklen_t), | |
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91 | ('msg_iov', ctypes.POINTER(_iovec)), | |
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92 | ('msg_iovlen', _msg_iovlen_t), | |
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93 | ('msg_control', ctypes.c_void_p), | |
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94 | ('msg_controllen', _msg_controllen_t), | |
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95 | ('msg_flags', ctypes.c_int), | |
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96 | ] | |
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97 | ||
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98 | class _cmsghdr(ctypes.Structure): | |
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99 | _fields_ = [ | |
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100 | ('cmsg_len', _cmsg_len_t), | |
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101 | ('cmsg_level', ctypes.c_int), | |
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102 | ('cmsg_type', ctypes.c_int), | |
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103 | ('cmsg_data', ctypes.c_ubyte * 0), | |
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104 | ] | |
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105 | ||
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106 | _libc = ctypes.CDLL(ctypes.util.find_library('c'), use_errno=True) | |
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107 | _recvmsg = _libc.recvmsg | |
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108 | _recvmsg.restype = ctypes.c_ssize_t | |
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109 | _recvmsg.argtypes = (ctypes.c_int, ctypes.POINTER(_msghdr), ctypes.c_int) | |
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110 | ||
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111 | def _CMSG_FIRSTHDR(msgh): | |
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112 | if msgh.msg_controllen < ctypes.sizeof(_cmsghdr): | |
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113 | return | |
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114 | cmsgptr = ctypes.cast(msgh.msg_control, ctypes.POINTER(_cmsghdr)) | |
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115 | return cmsgptr.contents | |
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116 | ||
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117 | # The pure version is less portable than the native version because the | |
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118 | # handling of socket ancillary data heavily depends on C preprocessor. | |
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119 | # Also, some length fields are wrongly typed in Linux kernel. | |
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120 | def recvfds(sockfd): | |
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121 | """receive list of file descriptors via socket""" | |
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122 | dummy = (ctypes.c_ubyte * 1)() | |
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123 | iov = _iovec(ctypes.cast(dummy, ctypes.c_void_p), ctypes.sizeof(dummy)) | |
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124 | cbuf = ctypes.create_string_buffer(256) | |
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125 | msgh = _msghdr(None, 0, | |
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126 | ctypes.pointer(iov), 1, | |
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127 | ctypes.cast(cbuf, ctypes.c_void_p), ctypes.sizeof(cbuf), | |
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128 | 0) | |
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129 | r = _recvmsg(sockfd, ctypes.byref(msgh), 0) | |
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130 | if r < 0: | |
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131 | e = ctypes.get_errno() | |
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132 | raise OSError(e, os.strerror(e)) | |
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133 | # assumes that the first cmsg has fds because it isn't easy to write | |
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134 | # portable CMSG_NXTHDR() with ctypes. | |
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135 | cmsg = _CMSG_FIRSTHDR(msgh) | |
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136 | if not cmsg: | |
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137 | return [] | |
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138 | if (cmsg.cmsg_level != socket.SOL_SOCKET or | |
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139 | cmsg.cmsg_type != _SCM_RIGHTS): | |
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140 | return [] | |
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141 | rfds = ctypes.cast(cmsg.cmsg_data, ctypes.POINTER(ctypes.c_int)) | |
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142 | rfdscount = ((cmsg.cmsg_len - _cmsghdr.cmsg_data.offset) / | |
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143 | ctypes.sizeof(ctypes.c_int)) | |
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144 | return [rfds[i] for i in xrange(rfdscount)] | |
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145 | ||
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62 | 146 | else: |
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63 | import ctypes | |
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64 | 147 | import msvcrt |
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65 | 148 | |
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66 | 149 | _kernel32 = ctypes.windll.kernel32 |
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