Mercurial > cpython-lru_cache-weakref

annotate Modules/termios.c @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents be956b1efb97
children 3b7cd83b602d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1879
91bfb2771554 Steen Lumholt's termios interface.
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1 /* termiosmodule.c -- POSIX terminal I/O module implementation. */
91bfb2771554 Steen Lumholt's termios interface.
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2
1888
be956b1efb97 * various modules: #include "Python.h" and remove most remporary
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3 #include <Python.h>
1879
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4
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5 #define PyInit_termios inittermios
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6
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7 #include <termios.h>
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8
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9 #define BAD "bad termios argument"
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10
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11 static PyObject *TermiosError;
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12
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13 /* termios = tcgetattr(fd)
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14 termios is
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15 [iflag, oflag, cflag, lflag, ispeed, ospeed, [cc[0], ..., cc[NCCS]]]
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16
91bfb2771554 Steen Lumholt's termios interface.
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17 Return the attributes of the terminal device. */
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18
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19 static PyObject *
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20 termios_tcgetattr(self, args)
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21 PyObject *self;
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22 PyObject *args;
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23 {
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24 int fd;
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25 struct termios mode;
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26 PyObject *cc;
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27 speed_t ispeed, ospeed;
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28 PyObject *v;
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29 int i;
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30 char ch;
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31
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32 if (!PyArg_Parse(args, "i", &fd))
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33 return NULL;
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34
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35 if (tcgetattr(fd, &mode) == -1)
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36 PyErr_SetFromErrno(TermiosError);
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37
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38 ispeed = cfgetispeed(&mode);
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39 ospeed = cfgetospeed(&mode);
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40
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41 cc = PyList_New(NCCS);
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42 if (cc == NULL)
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43 return NULL;
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44 for (i = 0; i < NCCS; i++) {
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45 ch = (char)mode.c_cc[i];
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46 v = PyString_FromStringAndSize(&ch, 1);
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47 if (v == NULL)
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48 return NULL;
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49 PyList_SetItem(cc, i, v);
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50 }
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51
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52 /* Convert the MIN and TIME slots to integer. On some systems, the
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53 MIN and TIME slots are the same as the EOF and EOL slots. So we
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54 only do this in noncanonical input mode. */
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55 if (mode.c_lflag & ICANON == 0) {
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56 v = PyInt_FromLong((long)mode.c_cc[VMIN]);
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57 if (v == NULL)
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58 return NULL;
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59 PyList_SetItem(cc, VMIN, v);
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60 v = PyInt_FromLong((long)mode.c_cc[VTIME]);
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61 if (v == NULL)
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62 return NULL;
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63 PyList_SetItem(cc, VTIME, v);
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64 }
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65
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66 v = PyList_New(7);
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67 PyList_SetItem(v, 0, PyInt_FromLong((long)mode.c_iflag));
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68 PyList_SetItem(v, 1, PyInt_FromLong((long)mode.c_oflag));
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69 PyList_SetItem(v, 2, PyInt_FromLong((long)mode.c_cflag));
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70 PyList_SetItem(v, 3, PyInt_FromLong((long)mode.c_lflag));
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71 PyList_SetItem(v, 4, PyInt_FromLong((long)ispeed));
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72 PyList_SetItem(v, 5, PyInt_FromLong((long)ospeed));
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73 PyList_SetItem(v, 6, cc);
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74
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75 return v;
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76 }
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77
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78 /* tcsetattr(fd, when, termios)
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79 Set the attributes of the terminal device. */
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80
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81 static PyObject *
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82 termios_tcsetattr(self, args)
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83 PyObject *self;
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84 PyObject *args;
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85 {
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86 int fd, when;
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87 struct termios mode;
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88 speed_t ispeed, ospeed;
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89 PyObject *term, *cc, *v;
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90 int i;
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91
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92 if (!PyArg_Parse(args, "(iiO)", &fd, &when, &term))
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93 return NULL;
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94 if (!PyList_Check(term) || PyList_Size(term) != 7) {
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95 PyErr_SetString(PyExc_TypeError, BAD);
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96 return NULL;
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97 }
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98 for (i = 0; i < 6; i++)
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99 if (!PyInt_Check(PyList_GetItem(term, i))) {
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100 PyErr_SetString(PyExc_TypeError, BAD);
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101 return NULL;
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102 }
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103
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104 mode.c_iflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 0));
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105 mode.c_oflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 1));
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106 mode.c_cflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 2));
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107 mode.c_lflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 3));
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108 ispeed = (speed_t) PyInt_AsLong(PyList_GetItem(term, 4));
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109 ospeed = (speed_t) PyInt_AsLong(PyList_GetItem(term, 5));
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110 cc = PyList_GetItem(term, 6);
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111
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112 if (!PyList_Check(cc) || PyList_Size(cc) != NCCS) {
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113 PyErr_SetString(PyExc_TypeError, BAD);
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114 return NULL;
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115 }
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116
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117 for (i = 0; i < NCCS; i++) {
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118 v = PyList_GetItem(cc, i);
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119 if (PyString_Check(v) && PyString_Size(v) == 1)
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120 mode.c_cc[i] = (cc_t) * PyString_AsString(v);
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121 else if (PyInt_Check(v))
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122 mode.c_cc[i] = (cc_t) PyInt_AsLong(v);
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123 else {
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124 PyErr_SetString(PyExc_TypeError, BAD);
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125 return NULL;
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126 }
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127 }
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128
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129 if (cfsetispeed(&mode, (speed_t) ispeed) == -1)
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130 PyErr_SetFromErrno(TermiosError);
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131 if (cfsetospeed(&mode, (speed_t) ospeed) == -1)
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132 PyErr_SetFromErrno(TermiosError);
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133 if (tcsetattr(fd, when, &mode) == -1)
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134 PyErr_SetFromErrno(TermiosError);
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135
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136 Py_INCREF(Py_None);
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137 return Py_None;
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138 }
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139
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140 /* tcsendbreak(fd, duration)
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141 Generate a break condition. */
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142
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143 static PyObject *
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144 termios_tcsendbreak(self, args)
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145 PyObject *self;
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146 PyObject *args;
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147 {
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148 int fd, duration;
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149
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150 if (!PyArg_Parse(args, "(ii)", &fd, &duration))
91bfb2771554 Steen Lumholt's termios interface.
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151 return NULL;
91bfb2771554 Steen Lumholt's termios interface.
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152 if (tcsendbreak(fd, duration) == -1)
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153 PyErr_SetFromErrno(TermiosError);
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154
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155 Py_INCREF(Py_None);
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156 return Py_None;
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157 }
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158
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159 /* tcdrain(fd)
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160 Wait until all queued output to the terminal has been
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161 transmitted. */
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162
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163 static PyObject *
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164 termios_tcdrain(self, args)
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165 PyObject *self;
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166 PyObject *args;
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167 {
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168 int fd;
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169
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170 if (!PyArg_Parse(args, "i", &fd))
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171 return NULL;
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172 if (tcdrain(fd) == -1)
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173 PyErr_SetFromErrno(TermiosError);
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174
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175 Py_INCREF(Py_None);
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176 return Py_None;
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177 }
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178
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179 /* tcflush(fd, queue)
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180 Clear the input and/or output queues associated with
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181 the terminal. */
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182
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183 static PyObject *
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184 termios_tcflush(self, args)
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185 PyObject *self;
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186 PyObject *args;
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187 {
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188 int fd, queue;
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189
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190 if (!PyArg_Parse(args, "(ii)", &fd, &queue))
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191 return NULL;
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192 if (tcflush(fd, queue) == -1)
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193 PyErr_SetFromErrno(TermiosError);
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194
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195 Py_INCREF(Py_None);
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196 return Py_None;
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197 }
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198
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199 /* tcflow(fd, action)
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200 Perform operations relating to XON/XOFF flow control on
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201 the terminal. */
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202
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203 static PyObject *
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204 termios_tcflow(self, args)
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205 PyObject *self;
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206 PyObject *args;
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207 {
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208 int fd, action;
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209
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210 if (!PyArg_Parse(args, "(ii)", &fd, &action))
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211 return NULL;
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212 if (tcflow(fd, action) == -1)
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213 PyErr_SetFromErrno(TermiosError);
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214
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215 Py_INCREF(Py_None);
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216 return Py_None;
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217 }
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218
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219 static PyMethodDef termios_methods[] =
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220 {
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221 {"tcgetattr", termios_tcgetattr},
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222 {"tcsetattr", termios_tcsetattr},
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223 {"tcsendbreak", termios_tcsendbreak},
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224 {"tcdrain", termios_tcdrain},
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225 {"tcflush", termios_tcflush},
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226 {"tcflow", termios_tcflow},
91bfb2771554 Steen Lumholt's termios interface.
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227 {NULL, NULL}
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228 };
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229
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230 void
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231 PyInit_termios()
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232 {
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233 PyObject *m, *d;
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234
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235 m = Py_InitModule("termios", termios_methods);
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236
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237 d = PyModule_GetDict(m);
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238 TermiosError = Py_BuildValue("s", "termios.error");
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239 PyDict_SetItemString(d, "error", TermiosError);
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240
91bfb2771554 Steen Lumholt's termios interface.
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241 if (PyErr_Occurred())
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242 Py_FatalError("can't initialize module termios");
91bfb2771554 Steen Lumholt's termios interface.
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243 }