Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 8566:6e8b0e754a7f legacy-trunk
Added doc strings. Maybe the doc string for the module itself is a bit
long, but it sure helps!
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Sat, 27 Jun 1998 19:43:25 +0000 |
| parents | f94d5ae642a9 |
| children | 44baef8ab5c8 |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
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7 Permission to use, copy, modify, and distribute this software and its |
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8 documentation for any purpose and without fee is hereby granted, |
| 145 | 9 provided that the above copyright notice appear in all copies and that |
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10 both that copyright notice and this permission notice appear in |
| 145 | 11 supporting documentation, and that the names of Stichting Mathematisch |
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12 Centrum or CWI or Corporation for National Research Initiatives or |
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13 CNRI not be used in advertising or publicity pertaining to |
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14 distribution of the software without specific, written prior |
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15 permission. |
| 145 | 16 |
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17 While CWI is the initial source for this software, a modified version |
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18 is made available by the Corporation for National Research Initiatives |
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19 (CNRI) at the Internet address ftp://ftp.python.org. |
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20 |
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
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28 PERFORMANCE OF THIS SOFTWARE. |
| 145 | 29 |
| 30 ******************************************************************/ | |
| 31 | |
| 6 | 32 /* System module */ |
| 33 | |
| 34 /* | |
| 35 Various bits of information used by the interpreter are collected in | |
| 36 module 'sys'. | |
| 86 | 37 Function member: |
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38 - exit(sts): raise SystemExit |
| 6 | 39 Data members: |
| 40 - stdin, stdout, stderr: standard file objects | |
| 86 | 41 - modules: the table of modules (dictionary) |
| 6 | 42 - path: module search path (list of strings) |
| 86 | 43 - argv: script arguments (list of strings) |
| 44 - ps1, ps2: optional primary and secondary prompts (strings) | |
| 6 | 45 */ |
| 46 | |
| 5372 | 47 #include "Python.h" |
| 86 | 48 |
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49 #include "osdefs.h" |
| 86 | 50 |
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51 #ifdef HAVE_UNISTD_H |
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52 #include <unistd.h> |
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53 #endif |
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54 |
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55 #ifdef MS_COREDLL |
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56 extern void *PyWin_DLLhModule; |
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Get DLL version from a variable.
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57 /* A string loaded from the DLL at startup: */ |
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58 extern const char *PyWin_DLLVersionString; |
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59 #endif |
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60 |
| 5372 | 61 PyObject * |
| 62 PySys_GetObject(name) | |
| 6 | 63 char *name; |
| 64 { | |
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65 PyThreadState *tstate = PyThreadState_Get(); |
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66 PyObject *sd = tstate->interp->sysdict; |
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67 return PyDict_GetItemString(sd, name); |
| 6 | 68 } |
| 69 | |
| 70 FILE * | |
| 5372 | 71 PySys_GetFile(name, def) |
| 6 | 72 char *name; |
| 73 FILE *def; | |
| 74 { | |
| 75 FILE *fp = NULL; | |
| 5372 | 76 PyObject *v = PySys_GetObject(name); |
| 77 if (v != NULL && PyFile_Check(v)) | |
| 78 fp = PyFile_AsFile(v); | |
| 6 | 79 if (fp == NULL) |
| 80 fp = def; | |
| 81 return fp; | |
| 82 } | |
| 83 | |
| 84 int | |
| 5372 | 85 PySys_SetObject(name, v) |
| 6 | 86 char *name; |
| 5372 | 87 PyObject *v; |
| 6 | 88 { |
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89 PyThreadState *tstate = PyThreadState_Get(); |
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90 PyObject *sd = tstate->interp->sysdict; |
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91 if (v == NULL) { |
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92 if (PyDict_GetItemString(sd, name) == NULL) |
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93 return 0; |
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94 else |
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95 return PyDict_DelItemString(sd, name); |
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96 } |
| 6 | 97 else |
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98 return PyDict_SetItemString(sd, name, v); |
| 6 | 99 } |
| 100 | |
| 5372 | 101 static PyObject * |
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102 sys_exc_info(self, args) |
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103 PyObject *self; |
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104 PyObject *args; |
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105 { |
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106 PyThreadState *tstate; |
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107 if (!PyArg_Parse(args, "")) |
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108 return NULL; |
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109 tstate = PyThreadState_Get(); |
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110 return Py_BuildValue( |
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111 "(OOO)", |
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112 tstate->exc_type != NULL ? tstate->exc_type : Py_None, |
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113 tstate->exc_value != NULL ? tstate->exc_value : Py_None, |
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114 tstate->exc_traceback != NULL ? |
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115 tstate->exc_traceback : Py_None); |
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116 } |
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117 |
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118 static char exc_info_doc[] = |
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119 "exc_info() -> (type, value, traceback)\n\ |
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120 \n\ |
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121 Return information about the exception that is currently being handled.\n\ |
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122 This should be called from inside an except clause only."; |
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123 |
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124 static PyObject * |
| 6 | 125 sys_exit(self, args) |
| 5372 | 126 PyObject *self; |
| 127 PyObject *args; | |
| 6 | 128 { |
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129 /* Raise SystemExit so callers may catch it or clean up. */ |
| 5372 | 130 PyErr_SetObject(PyExc_SystemExit, args); |
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131 return NULL; |
| 6 | 132 } |
| 133 | |
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134 static char exit_doc[] = |
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135 "exit([status])\n\ |
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136 \n\ |
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137 Exit the interpreter by raising SystemExit(status).\n\ |
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138 If the status is omitted or None, it defaults to zero (i.e., success).\n\ |
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139 If the status numeric, it will be used as the system exit status.\n\ |
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140 If it is another kind of object, it will be printed and the system\n\ |
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141 exit status will be one (i.e., failure)."; |
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142 |
| 5372 | 143 static PyObject * |
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144 sys_settrace(self, args) |
| 5372 | 145 PyObject *self; |
| 146 PyObject *args; | |
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147 { |
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148 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 149 if (args == Py_None) |
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150 args = NULL; |
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151 else |
| 5372 | 152 Py_XINCREF(args); |
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153 Py_XDECREF(tstate->sys_tracefunc); |
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154 tstate->sys_tracefunc = args; |
| 5372 | 155 Py_INCREF(Py_None); |
| 156 return Py_None; | |
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157 } |
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158 |
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159 static char settrace_doc[] = |
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160 "settrace(function)\n\ |
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161 \n\ |
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162 Set the global debug tracing function. It will be called on each\n\ |
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163 function call. See the debugger chapter in the library manual."; |
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164 |
| 5372 | 165 static PyObject * |
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166 sys_setprofile(self, args) |
| 5372 | 167 PyObject *self; |
| 168 PyObject *args; | |
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169 { |
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170 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 171 if (args == Py_None) |
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172 args = NULL; |
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173 else |
| 5372 | 174 Py_XINCREF(args); |
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175 Py_XDECREF(tstate->sys_profilefunc); |
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176 tstate->sys_profilefunc = args; |
| 5372 | 177 Py_INCREF(Py_None); |
| 178 return Py_None; | |
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179 } |
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180 |
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181 static char setprofile_doc[] = |
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182 "setprofile(function)\n\ |
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183 \n\ |
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184 Set the profiling function. It will be called on each function call\n\ |
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185 and return. See the profiler chapter in the library manual."; |
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186 |
| 5372 | 187 static PyObject * |
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188 sys_setcheckinterval(self, args) |
| 5372 | 189 PyObject *self; |
| 190 PyObject *args; | |
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191 { |
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192 PyThreadState *tstate = PyThreadState_Get(); |
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193 if (!PyArg_ParseTuple(args, "i", &tstate->interp->checkinterval)) |
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194 return NULL; |
| 5372 | 195 Py_INCREF(Py_None); |
| 196 return Py_None; | |
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197 } |
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198 |
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199 static char setcheckinterval_doc[] = |
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200 "setcheckinterval(n)\n\ |
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201 \n\ |
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202 Tell the Python interpreter to check for asynchronous events every\n\ |
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203 n instructions. This also affects how often thread switches occur."; |
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204 |
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205 #ifdef USE_MALLOPT |
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206 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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207 #include <malloc.h> |
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208 |
| 5372 | 209 static PyObject * |
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210 sys_mdebug(self, args) |
| 5372 | 211 PyObject *self; |
| 212 PyObject *args; | |
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213 { |
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214 int flag; |
| 5372 | 215 if (!PyArg_Parse(args, "i", &flag)) |
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216 return NULL; |
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217 mallopt(M_DEBUG, flag); |
| 5372 | 218 Py_INCREF(Py_None); |
| 219 return Py_None; | |
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220 } |
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221 #endif /* USE_MALLOPT */ |
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222 |
| 5372 | 223 static PyObject * |
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224 sys_getrefcount(self, args) |
| 5372 | 225 PyObject *self; |
| 226 PyObject *args; | |
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227 { |
| 5372 | 228 PyObject *arg; |
| 229 if (!PyArg_Parse(args, "O", &arg)) | |
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230 return NULL; |
| 5372 | 231 return PyInt_FromLong((long) arg->ob_refcnt); |
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232 } |
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233 |
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234 static char getrefcount_doc[] = |
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235 "getrefcount(object) -> integer\n\ |
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236 \n\ |
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237 Return the current reference count for the object. This includes the\n\ |
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238 temporary reference in the argument list, so it is at least 2."; |
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239 |
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240 #ifdef COUNT_ALLOCS |
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241 static PyObject * |
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242 sys_getcounts(self, args) |
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243 PyObject *self, *args; |
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244 { |
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245 extern PyObject *get_counts Py_PROTO((void)); |
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246 |
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247 if (!PyArg_Parse(args, "")) |
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248 return NULL; |
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249 return get_counts(); |
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250 } |
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251 #endif |
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252 |
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253 #ifdef Py_TRACE_REFS |
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254 /* Defined in objects.c because it uses static globals if that file */ |
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255 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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256 #endif |
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257 |
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258 #ifdef DYNAMIC_EXECUTION_PROFILE |
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259 /* Defined in ceval.c because it uses static globals if that file */ |
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260 extern PyObject *_Py_GetDXProfile Py_PROTO((PyObject *, PyObject *)); |
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261 #endif |
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262 |
| 5372 | 263 static PyMethodDef sys_methods[] = { |
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264 /* Might as well keep this in alphabetic order */ |
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265 {"exc_info", sys_exc_info, 0, exc_info_doc}, |
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266 {"exit", sys_exit, 0, exit_doc}, |
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267 #ifdef COUNT_ALLOCS |
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268 {"getcounts", sys_getcounts, 0}, |
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269 #endif |
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270 #ifdef DYNAMIC_EXECUTION_PROFILE |
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271 {"getdxp", _Py_GetDXProfile, 1}, |
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272 #endif |
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273 #ifdef Py_TRACE_REFS |
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274 {"getobjects", _Py_GetObjects, 1}, |
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275 #endif |
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276 {"getrefcount", sys_getrefcount, 0, getrefcount_doc}, |
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277 #ifdef USE_MALLOPT |
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278 {"mdebug", sys_mdebug, 0}, |
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279 #endif |
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280 {"setcheckinterval", sys_setcheckinterval, 1, setcheckinterval_doc}, |
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281 {"setprofile", sys_setprofile, 0, setprofile_doc}, |
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282 {"settrace", sys_settrace, 0, settrace_doc}, |
| 86 | 283 {NULL, NULL} /* sentinel */ |
| 284 }; | |
| 285 | |
| 5372 | 286 static PyObject * |
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287 list_builtin_module_names() |
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288 { |
| 5372 | 289 PyObject *list = PyList_New(0); |
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290 int i; |
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291 if (list == NULL) |
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292 return NULL; |
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293 for (i = 0; PyImport_Inittab[i].name != NULL; i++) { |
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294 PyObject *name = PyString_FromString( |
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295 PyImport_Inittab[i].name); |
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296 if (name == NULL) |
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297 break; |
| 5372 | 298 PyList_Append(list, name); |
| 299 Py_DECREF(name); | |
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300 } |
| 5372 | 301 if (PyList_Sort(list) != 0) { |
| 302 Py_DECREF(list); | |
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303 list = NULL; |
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304 } |
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305 if (list) { |
| 5372 | 306 PyObject *v = PyList_AsTuple(list); |
| 307 Py_DECREF(list); | |
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308 list = v; |
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309 } |
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310 return list; |
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311 } |
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312 |
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313 /* XXX If your compiler doesn't like strings this long, edit it. */ |
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314 static char sys_doc[] = |
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315 "This module provides access to some objects used or maintained by the\n\ |
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316 interpreter and to functions that interact strongly with the interpreter.\n\ |
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317 \n\ |
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318 Dynamic objects:\n\ |
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319 \n\ |
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320 argv -- command line arguments; argv[0] is the script pathname if known\n\ |
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321 path -- module search path; path[0] is the script directory, else ''\n\ |
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322 modules -- dictionary of loaded modules\n\ |
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323 exitfunc -- you may set this to a function to be called when Python exits\n\ |
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324 \n\ |
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325 stdin -- standard input file object; used by raw_input() and input()\n\ |
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326 stdout -- standard output file object; used by the print statement\n\ |
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327 stderr -- standard error object; used for error messages\n\ |
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328 By assigning another file object (or an object that behaves like a file)\n\ |
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329 to one of these, it is possible to redirect all of the interpreter's I/O.\n\ |
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330 \n\ |
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331 last_type -- type of last uncaught exception\n\ |
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332 last_value -- value of last uncaught exception\n\ |
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333 last_traceback -- traceback of last uncaught exception\n\ |
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334 These three are only available in an interactive session after a\n\ |
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335 traceback has been printed.\n\ |
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336 \n\ |
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337 exc_type -- type of exception currently being handled\n\ |
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338 exc_value -- value of exception currently being handled\n\ |
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339 exc_traceback -- traceback of exception currently being handled\n\ |
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340 The function exc_info() should be used instead of these three,\n\ |
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341 because it is thread-safe.\n\ |
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342 \n\ |
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343 Static objects:\n\ |
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344 \n\ |
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345 maxint -- the largest supported integer (the smallest is -maxint-1)\n\ |
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346 builtin_module_names -- tuple of module names built into this intepreter\n\ |
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347 version -- the version of this interpreter\n\ |
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348 copyright -- copyright notice pertaining to this interpreter\n\ |
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349 platform -- platform identifier\n\ |
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350 executable -- pathname of this Python interpreter\n\ |
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351 prefix -- prefix used to find the Python library\n\ |
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352 exec_prefix -- prefix used to find the machine-specific Python library\n\ |
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353 dllhandle -- [Windows only] integer handle of the Python DLL\n\ |
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354 winver -- [Windows only] version number of the Python DLL\n\ |
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355 __stdin__ -- the original stdin; don't use!\n\ |
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356 __stdout__ -- the original stdout; don't use!\n\ |
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357 __stderr__ -- the original stderr; don't use!\n\ |
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358 \n\ |
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359 Functions:\n\ |
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360 \n\ |
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361 exc_info() -- return thread-safe information about the current exception\n\ |
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362 exit() -- exit the interpreter by raising SystemExit\n\ |
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363 getrefcount() -- return the reference count for an object (plus one :-)\n\ |
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364 setcheckinterval() -- control how often the interpreter checks for events\n\ |
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365 setprofile() -- set the global profiling function\n\ |
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366 settrace() -- set the global debug tracing function\n\ |
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367 "; |
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368 |
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369 PyObject * |
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370 _PySys_Init() |
| 6 | 371 { |
| 5372 | 372 extern int fclose Py_PROTO((FILE *)); |
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373 PyObject *m, *v, *sysdict; |
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374 PyObject *sysin, *sysout, *syserr; |
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375 |
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376 m = Py_InitModule3("sys", sys_methods, sys_doc); |
| 5372 | 377 sysdict = PyModule_GetDict(m); |
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378 |
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379 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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380 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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381 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 382 if (PyErr_Occurred()) |
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383 return NULL; |
| 5372 | 384 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 385 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 386 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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387 /* Make backup copies for cleanup */ |
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388 PyDict_SetItemString(sysdict, "__stdin__", sysin); |
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389 PyDict_SetItemString(sysdict, "__stdout__", sysout); |
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390 PyDict_SetItemString(sysdict, "__stderr__", syserr); |
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391 Py_XDECREF(sysin); |
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392 Py_XDECREF(sysout); |
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393 Py_XDECREF(syserr); |
| 5372 | 394 PyDict_SetItemString(sysdict, "version", |
| 395 v = PyString_FromString(Py_GetVersion())); | |
| 396 Py_XDECREF(v); | |
| 397 PyDict_SetItemString(sysdict, "copyright", | |
| 398 v = PyString_FromString(Py_GetCopyright())); | |
| 399 Py_XDECREF(v); | |
| 400 PyDict_SetItemString(sysdict, "platform", | |
| 401 v = PyString_FromString(Py_GetPlatform())); | |
| 402 Py_XDECREF(v); | |
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403 PyDict_SetItemString(sysdict, "executable", |
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404 v = PyString_FromString(Py_GetProgramFullPath())); |
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405 Py_XDECREF(v); |
| 5372 | 406 PyDict_SetItemString(sysdict, "prefix", |
| 407 v = PyString_FromString(Py_GetPrefix())); | |
| 408 Py_XDECREF(v); | |
| 409 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 410 v = PyString_FromString(Py_GetExecPrefix())); | |
| 411 Py_XDECREF(v); | |
| 412 PyDict_SetItemString(sysdict, "maxint", | |
| 413 v = PyInt_FromLong(PyInt_GetMax())); | |
| 414 Py_XDECREF(v); | |
| 415 PyDict_SetItemString(sysdict, "builtin_module_names", | |
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416 v = list_builtin_module_names()); |
| 5372 | 417 Py_XDECREF(v); |
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418 #ifdef MS_COREDLL |
| 5372 | 419 PyDict_SetItemString(sysdict, "dllhandle", |
| 420 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 421 Py_XDECREF(v); | |
| 422 PyDict_SetItemString(sysdict, "winver", | |
|
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423 v = PyString_FromString(PyWin_DLLVersionString)); |
| 5372 | 424 Py_XDECREF(v); |
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425 #endif |
| 5372 | 426 if (PyErr_Occurred()) |
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427 return NULL; |
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428 return m; |
| 86 | 429 } |
| 430 | |
| 5372 | 431 static PyObject * |
| 86 | 432 makepathobject(path, delim) |
| 433 char *path; | |
| 434 int delim; | |
| 435 { | |
| 436 int i, n; | |
| 437 char *p; | |
| 5372 | 438 PyObject *v, *w; |
| 6 | 439 |
| 86 | 440 n = 1; |
| 441 p = path; | |
| 442 while ((p = strchr(p, delim)) != NULL) { | |
| 443 n++; | |
| 444 p++; | |
| 445 } | |
| 5372 | 446 v = PyList_New(n); |
| 86 | 447 if (v == NULL) |
| 448 return NULL; | |
| 449 for (i = 0; ; i++) { | |
| 450 p = strchr(path, delim); | |
| 451 if (p == NULL) | |
| 452 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 453 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 454 if (w == NULL) { |
| 5372 | 455 Py_DECREF(v); |
| 86 | 456 return NULL; |
| 457 } | |
| 5372 | 458 PyList_SetItem(v, i, w); |
| 86 | 459 if (*p == '\0') |
| 460 break; | |
| 461 path = p+1; | |
| 462 } | |
| 463 return v; | |
| 464 } | |
| 465 | |
| 466 void | |
| 5372 | 467 PySys_SetPath(path) |
| 86 | 468 char *path; |
| 469 { | |
| 5372 | 470 PyObject *v; |
| 86 | 471 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 472 Py_FatalError("can't create sys.path"); |
| 473 if (PySys_SetObject("path", v) != 0) | |
| 474 Py_FatalError("can't assign sys.path"); | |
| 475 Py_DECREF(v); | |
|
83
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Empty all modules' symbol tables, so most circular references are
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476 } |
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Empty all modules' symbol tables, so most circular references are
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|
477 |
| 5372 | 478 static PyObject * |
| 86 | 479 makeargvobject(argc, argv) |
| 480 int argc; | |
| 481 char **argv; | |
|
83
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Empty all modules' symbol tables, so most circular references are
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|
482 { |
| 5372 | 483 PyObject *av; |
|
596
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
484 if (argc <= 0 || argv == NULL) { |
|
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
485 /* Ensure at least one (empty) argument is seen */ |
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|
486 static char *empty_argv[1] = {""}; |
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
487 argv = empty_argv; |
|
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|
488 argc = 1; |
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
489 } |
| 5372 | 490 av = PyList_New(argc); |
| 86 | 491 if (av != NULL) { |
| 492 int i; | |
| 493 for (i = 0; i < argc; i++) { | |
| 5372 | 494 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 495 if (v == NULL) { |
| 5372 | 496 Py_DECREF(av); |
| 86 | 497 av = NULL; |
| 498 break; | |
| 499 } | |
| 5372 | 500 PyList_SetItem(av, i, v); |
|
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|
501 } |
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|
502 } |
| 86 | 503 return av; |
| 6 | 504 } |
| 505 | |
| 506 void | |
| 5372 | 507 PySys_SetArgv(argc, argv) |
| 86 | 508 int argc; |
| 509 char **argv; | |
| 6 | 510 { |
| 5372 | 511 PyObject *av = makeargvobject(argc, argv); |
| 512 PyObject *path = PySys_GetObject("path"); | |
| 86 | 513 if (av == NULL) |
| 5372 | 514 Py_FatalError("no mem for sys.argv"); |
| 515 if (PySys_SetObject("argv", av) != 0) | |
| 516 Py_FatalError("can't assign sys.argv"); | |
|
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517 if (path != NULL) { |
|
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|
518 char *argv0 = argv[0]; |
|
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|
519 char *p = NULL; |
|
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520 int n = 0; |
| 5372 | 521 PyObject *a; |
|
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|
522 #ifdef HAVE_READLINK |
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|
523 char link[MAXPATHLEN+1]; |
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524 char argv0copy[2*MAXPATHLEN+1]; |
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525 int nr = 0; |
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526 if (argc > 0 && argv0 != NULL) |
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527 nr = readlink(argv0, link, MAXPATHLEN); |
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528 if (nr > 0) { |
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|
529 /* It's a symlink */ |
|
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|
530 link[nr] = '\0'; |
|
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|
531 if (link[0] == SEP) |
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|
532 argv0 = link; /* Link to absolute path */ |
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|
533 else if (strchr(link, SEP) == NULL) |
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|
534 ; /* Link without path */ |
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|
535 else { |
|
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|
536 /* Must join(dirname(argv0), link) */ |
|
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|
537 char *q = strrchr(argv0, SEP); |
|
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|
538 if (q == NULL) |
|
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|
539 argv0 = link; /* argv0 without path */ |
|
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|
540 else { |
|
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|
541 /* Must make a copy */ |
|
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|
542 strcpy(argv0copy, argv0); |
|
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|
543 q = strrchr(argv0copy, SEP); |
|
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|
544 strcpy(q+1, link); |
|
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|
545 argv0 = argv0copy; |
|
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|
546 } |
|
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|
547 } |
|
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|
548 } |
|
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|
549 #endif /* HAVE_READLINK */ |
|
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|
550 #if SEP == '\\' /* Special case for MS filename syntax */ |
|
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|
551 if (argc > 0 && argv0 != NULL) { |
|
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|
552 char *q; |
|
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|
553 p = strrchr(argv0, SEP); |
|
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|
554 /* Test for alternate separator */ |
|
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|
555 q = strrchr(p ? p : argv0, '/'); |
|
4256
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|
556 if (q != NULL) |
|
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|
557 p = q; |
|
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Changes to setpythonpath():
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|
558 if (p != NULL) { |
|
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|
559 n = p + 1 - argv0; |
|
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|
560 if (n > 1 && p[-1] != ':') |
|
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|
561 n--; /* Drop trailing separator */ |
|
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|
562 } |
|
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Changes to setpythonpath():
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|
563 } |
|
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Changes to setpythonpath():
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|
564 #else /* All other filename syntaxes */ |
|
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|
565 if (argc > 0 && argv0 != NULL) |
|
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|
566 p = strrchr(argv0, SEP); |
|
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|
567 if (p != NULL) { |
|
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|
568 n = p + 1 - argv0; |
|
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|
569 #if SEP == '/' /* Special case for Unix filename syntax */ |
|
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|
570 if (n > 1) |
|
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|
571 n--; /* Drop trailing separator */ |
|
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|
572 #endif /* Unix */ |
|
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|
573 } |
|
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Changes to setpythonpath():
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|
574 #endif /* All others */ |
| 5372 | 575 a = PyString_FromStringAndSize(argv0, n); |
|
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|
576 if (a == NULL) |
| 5372 | 577 Py_FatalError("no mem for sys.path insertion"); |
| 578 if (PyList_Insert(path, 0, a) < 0) | |
| 579 Py_FatalError("sys.path.insert(0) failed"); | |
| 580 Py_DECREF(a); | |
|
3806
93868c7a15c9
As a side effect of calling PySys_SetArgv (setpythonargv), the
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|
581 } |
| 5372 | 582 Py_DECREF(av); |
| 6 | 583 } |
|
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|
584 |
|
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|
585 |
|
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|
586 /* APIs to write to sys.stdout or sys.stderr using a printf-like interface. |
|
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|
587 Adapted from code submitted by Just van Rossum. |
|
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|
588 |
|
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|
589 PySys_WriteStdout(format, ...) |
|
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|
590 PySys_WriteStderr(format, ...) |
|
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|
591 |
|
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|
592 The first function writes to sys.stdout; the second to sys.stderr. When |
|
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|
593 there is a problem, they write to the real (C level) stdout or stderr; |
|
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|
594 no exceptions are raised (but a pending exception may be cleared when a |
|
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New APIs to write to sys.stdout or sys.stderr using a printf-like interface.
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|
595 new exception is caught). |
|
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|
596 |
|
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|
597 Both take a printf-style format string as their first argument followed |
|
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New APIs to write to sys.stdout or sys.stderr using a printf-like interface.
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|
598 by a variable length argument list determined by the format string. |
|
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|
599 |
|
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|
600 *** WARNING *** |
|
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|
601 |
|
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|
602 The format should limit the total size of the formatted output string to |
|
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|
603 1000 bytes. In particular, this means that no unrestricted "%s" formats |
|
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604 should occur; these should be limited using "%.<N>s where <N> is a |
|
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|
605 decimal number calculated so that <N> plus the maximum size of other |
|
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|
606 formatted text does not exceed 1000 bytes. Also watch out for "%f", |
|
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|
607 which can print hundreds of digits for very large numbers. |
|
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|
608 |
|
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|
609 */ |
|
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|
610 |
|
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|
611 static void |
|
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|
612 mywrite(name, fp, format, va) |
|
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|
613 char *name; |
|
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|
614 FILE *fp; |
|
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|
615 const char *format; |
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616 va_list va; |
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617 { |
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618 PyObject *file; |
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619 |
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620 file = PySys_GetObject(name); |
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621 if (file == NULL || PyFile_AsFile(file) == fp) |
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622 vfprintf(fp, format, va); |
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623 else { |
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624 char buffer[1001]; |
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625 vsprintf(buffer, format, va); |
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626 if (PyFile_WriteString(buffer, file) != 0) { |
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627 PyErr_Clear(); |
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628 fputs(buffer, fp); |
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629 } |
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630 } |
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631 } |
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632 |
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633 void |
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634 #ifdef HAVE_STDARG_PROTOTYPES |
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635 PySys_WriteStdout(const char *format, ...) |
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636 #else |
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637 PySys_WriteStdout(va_alist) |
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638 va_dcl |
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639 #endif |
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640 { |
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641 va_list va; |
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642 |
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643 #ifdef HAVE_STDARG_PROTOTYPES |
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644 va_start(va, format); |
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645 #else |
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646 char *format; |
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647 va_start(va); |
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648 format = va_arg(va, char *); |
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649 #endif |
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650 mywrite("stdout", stdout, format, va); |
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651 va_end(va); |
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652 } |
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653 |
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654 void |
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655 #ifdef HAVE_STDARG_PROTOTYPES |
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656 PySys_WriteStderr(const char *format, ...) |
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657 #else |
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658 PySys_WriteStderr(va_alist) |
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659 va_dcl |
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660 #endif |
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661 { |
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662 va_list va; |
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663 |
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664 #ifdef HAVE_STDARG_PROTOTYPES |
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665 va_start(va, format); |
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666 #else |
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667 char *format; |
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668 va_start(va); |
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669 format = va_arg(va, char *); |
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670 #endif |
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671 mywrite("stderr", stderr, format, va); |
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672 va_end(va); |
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673 } |