Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 9050:f3ebdb2274e4 legacy-trunk
__file__ used to be always set to the .pyc (or .pyo) file, even if
that file in fact did not exist or at least was not used. Change this
so that __file__ is *only* set to the .pyc/.pyo file when it actually
read the code object from it; otherwise __file__ is set to the .py
file.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Tue, 25 Aug 1998 18:44:34 +0000 |
| parents | 44baef8ab5c8 |
| children | 81574e4646b4 |
| 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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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 This doc string is too long to be a single string literal in VC++ 5.0. |
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314 Two literals concatenated works just fine. If you have a K&R compiler |
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315 or other abomination that however *does* understand longer strings, |
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316 get rid of the !!! comment in the middle and the quotes that surround it. */ |
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317 static char sys_doc[] = |
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318 "This module provides access to some objects used or maintained by the\n\ |
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319 interpreter and to functions that interact strongly with the interpreter.\n\ |
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320 \n\ |
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321 Dynamic objects:\n\ |
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322 \n\ |
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323 argv -- command line arguments; argv[0] is the script pathname if known\n\ |
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324 path -- module search path; path[0] is the script directory, else ''\n\ |
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325 modules -- dictionary of loaded modules\n\ |
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326 exitfunc -- you may set this to a function to be called when Python exits\n\ |
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327 \n\ |
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328 stdin -- standard input file object; used by raw_input() and input()\n\ |
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329 stdout -- standard output file object; used by the print statement\n\ |
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330 stderr -- standard error object; used for error messages\n\ |
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331 By assigning another file object (or an object that behaves like a file)\n\ |
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332 to one of these, it is possible to redirect all of the interpreter's I/O.\n\ |
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333 \n\ |
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334 last_type -- type of last uncaught exception\n\ |
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335 last_value -- value of last uncaught exception\n\ |
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336 last_traceback -- traceback of last uncaught exception\n\ |
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337 These three are only available in an interactive session after a\n\ |
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338 traceback has been printed.\n\ |
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339 \n\ |
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340 exc_type -- type of exception currently being handled\n\ |
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341 exc_value -- value of exception currently being handled\n\ |
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342 exc_traceback -- traceback of exception currently being handled\n\ |
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343 The function exc_info() should be used instead of these three,\n\ |
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344 because it is thread-safe.\n\ |
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345 " /* !!! */ "\n\ |
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346 Static objects:\n\ |
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347 \n\ |
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348 maxint -- the largest supported integer (the smallest is -maxint-1)\n\ |
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349 builtin_module_names -- tuple of module names built into this intepreter\n\ |
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350 version -- the version of this interpreter\n\ |
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351 copyright -- copyright notice pertaining to this interpreter\n\ |
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352 platform -- platform identifier\n\ |
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353 executable -- pathname of this Python interpreter\n\ |
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354 prefix -- prefix used to find the Python library\n\ |
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355 exec_prefix -- prefix used to find the machine-specific Python library\n\ |
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356 dllhandle -- [Windows only] integer handle of the Python DLL\n\ |
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357 winver -- [Windows only] version number of the Python DLL\n\ |
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358 __stdin__ -- the original stdin; don't use!\n\ |
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359 __stdout__ -- the original stdout; don't use!\n\ |
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360 __stderr__ -- the original stderr; don't use!\n\ |
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361 \n\ |
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362 Functions:\n\ |
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363 \n\ |
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364 exc_info() -- return thread-safe information about the current exception\n\ |
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365 exit() -- exit the interpreter by raising SystemExit\n\ |
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366 getrefcount() -- return the reference count for an object (plus one :-)\n\ |
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367 setcheckinterval() -- control how often the interpreter checks for events\n\ |
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368 setprofile() -- set the global profiling function\n\ |
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369 settrace() -- set the global debug tracing function\n\ |
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370 "; |
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371 |
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372 PyObject * |
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373 _PySys_Init() |
| 6 | 374 { |
| 5372 | 375 extern int fclose Py_PROTO((FILE *)); |
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376 PyObject *m, *v, *sysdict; |
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377 PyObject *sysin, *sysout, *syserr; |
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378 |
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379 m = Py_InitModule3("sys", sys_methods, sys_doc); |
| 5372 | 380 sysdict = PyModule_GetDict(m); |
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381 |
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382 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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383 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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384 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 385 if (PyErr_Occurred()) |
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386 return NULL; |
| 5372 | 387 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 388 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 389 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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390 /* Make backup copies for cleanup */ |
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391 PyDict_SetItemString(sysdict, "__stdin__", sysin); |
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392 PyDict_SetItemString(sysdict, "__stdout__", sysout); |
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393 PyDict_SetItemString(sysdict, "__stderr__", syserr); |
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394 Py_XDECREF(sysin); |
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395 Py_XDECREF(sysout); |
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396 Py_XDECREF(syserr); |
| 5372 | 397 PyDict_SetItemString(sysdict, "version", |
| 398 v = PyString_FromString(Py_GetVersion())); | |
| 399 Py_XDECREF(v); | |
| 400 PyDict_SetItemString(sysdict, "copyright", | |
| 401 v = PyString_FromString(Py_GetCopyright())); | |
| 402 Py_XDECREF(v); | |
| 403 PyDict_SetItemString(sysdict, "platform", | |
| 404 v = PyString_FromString(Py_GetPlatform())); | |
| 405 Py_XDECREF(v); | |
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406 PyDict_SetItemString(sysdict, "executable", |
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407 v = PyString_FromString(Py_GetProgramFullPath())); |
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408 Py_XDECREF(v); |
| 5372 | 409 PyDict_SetItemString(sysdict, "prefix", |
| 410 v = PyString_FromString(Py_GetPrefix())); | |
| 411 Py_XDECREF(v); | |
| 412 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 413 v = PyString_FromString(Py_GetExecPrefix())); | |
| 414 Py_XDECREF(v); | |
| 415 PyDict_SetItemString(sysdict, "maxint", | |
| 416 v = PyInt_FromLong(PyInt_GetMax())); | |
| 417 Py_XDECREF(v); | |
| 418 PyDict_SetItemString(sysdict, "builtin_module_names", | |
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419 v = list_builtin_module_names()); |
| 5372 | 420 Py_XDECREF(v); |
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421 #ifdef MS_COREDLL |
| 5372 | 422 PyDict_SetItemString(sysdict, "dllhandle", |
| 423 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 424 Py_XDECREF(v); | |
| 425 PyDict_SetItemString(sysdict, "winver", | |
|
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426 v = PyString_FromString(PyWin_DLLVersionString)); |
| 5372 | 427 Py_XDECREF(v); |
|
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428 #endif |
| 5372 | 429 if (PyErr_Occurred()) |
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430 return NULL; |
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431 return m; |
| 86 | 432 } |
| 433 | |
| 5372 | 434 static PyObject * |
| 86 | 435 makepathobject(path, delim) |
| 436 char *path; | |
| 437 int delim; | |
| 438 { | |
| 439 int i, n; | |
| 440 char *p; | |
| 5372 | 441 PyObject *v, *w; |
| 6 | 442 |
| 86 | 443 n = 1; |
| 444 p = path; | |
| 445 while ((p = strchr(p, delim)) != NULL) { | |
| 446 n++; | |
| 447 p++; | |
| 448 } | |
| 5372 | 449 v = PyList_New(n); |
| 86 | 450 if (v == NULL) |
| 451 return NULL; | |
| 452 for (i = 0; ; i++) { | |
| 453 p = strchr(path, delim); | |
| 454 if (p == NULL) | |
| 455 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 456 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 457 if (w == NULL) { |
| 5372 | 458 Py_DECREF(v); |
| 86 | 459 return NULL; |
| 460 } | |
| 5372 | 461 PyList_SetItem(v, i, w); |
| 86 | 462 if (*p == '\0') |
| 463 break; | |
| 464 path = p+1; | |
| 465 } | |
| 466 return v; | |
| 467 } | |
| 468 | |
| 469 void | |
| 5372 | 470 PySys_SetPath(path) |
| 86 | 471 char *path; |
| 472 { | |
| 5372 | 473 PyObject *v; |
| 86 | 474 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 475 Py_FatalError("can't create sys.path"); |
| 476 if (PySys_SetObject("path", v) != 0) | |
| 477 Py_FatalError("can't assign sys.path"); | |
| 478 Py_DECREF(v); | |
|
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Empty all modules' symbol tables, so most circular references are
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|
479 } |
|
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Empty all modules' symbol tables, so most circular references are
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|
480 |
| 5372 | 481 static PyObject * |
| 86 | 482 makeargvobject(argc, argv) |
| 483 int argc; | |
| 484 char **argv; | |
|
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Empty all modules' symbol tables, so most circular references are
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|
485 { |
| 5372 | 486 PyObject *av; |
|
596
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Ensure that sys.argv[0] always exists (maybe as empty string).
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|
487 if (argc <= 0 || argv == NULL) { |
|
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|
488 /* Ensure at least one (empty) argument is seen */ |
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489 static char *empty_argv[1] = {""}; |
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|
490 argv = empty_argv; |
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491 argc = 1; |
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|
492 } |
| 5372 | 493 av = PyList_New(argc); |
| 86 | 494 if (av != NULL) { |
| 495 int i; | |
| 496 for (i = 0; i < argc; i++) { | |
| 5372 | 497 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 498 if (v == NULL) { |
| 5372 | 499 Py_DECREF(av); |
| 86 | 500 av = NULL; |
| 501 break; | |
| 502 } | |
| 5372 | 503 PyList_SetItem(av, i, v); |
|
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504 } |
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|
505 } |
| 86 | 506 return av; |
| 6 | 507 } |
| 508 | |
| 509 void | |
| 5372 | 510 PySys_SetArgv(argc, argv) |
| 86 | 511 int argc; |
| 512 char **argv; | |
| 6 | 513 { |
| 5372 | 514 PyObject *av = makeargvobject(argc, argv); |
| 515 PyObject *path = PySys_GetObject("path"); | |
| 86 | 516 if (av == NULL) |
| 5372 | 517 Py_FatalError("no mem for sys.argv"); |
| 518 if (PySys_SetObject("argv", av) != 0) | |
| 519 Py_FatalError("can't assign sys.argv"); | |
|
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520 if (path != NULL) { |
|
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521 char *argv0 = argv[0]; |
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522 char *p = NULL; |
|
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523 int n = 0; |
| 5372 | 524 PyObject *a; |
|
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525 #ifdef HAVE_READLINK |
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|
526 char link[MAXPATHLEN+1]; |
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527 char argv0copy[2*MAXPATHLEN+1]; |
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528 int nr = 0; |
|
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529 if (argc > 0 && argv0 != NULL) |
|
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|
530 nr = readlink(argv0, link, MAXPATHLEN); |
|
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|
531 if (nr > 0) { |
|
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|
532 /* It's a symlink */ |
|
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|
533 link[nr] = '\0'; |
|
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|
534 if (link[0] == SEP) |
|
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|
535 argv0 = link; /* Link to absolute path */ |
|
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|
536 else if (strchr(link, SEP) == NULL) |
|
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|
537 ; /* Link without path */ |
|
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|
538 else { |
|
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|
539 /* Must join(dirname(argv0), link) */ |
|
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|
540 char *q = strrchr(argv0, SEP); |
|
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|
541 if (q == NULL) |
|
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|
542 argv0 = link; /* argv0 without path */ |
|
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|
543 else { |
|
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|
544 /* Must make a copy */ |
|
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|
545 strcpy(argv0copy, argv0); |
|
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|
546 q = strrchr(argv0copy, SEP); |
|
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|
547 strcpy(q+1, link); |
|
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|
548 argv0 = argv0copy; |
|
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|
549 } |
|
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|
550 } |
|
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|
551 } |
|
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|
552 #endif /* HAVE_READLINK */ |
|
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553 #if SEP == '\\' /* Special case for MS filename syntax */ |
|
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|
554 if (argc > 0 && argv0 != NULL) { |
|
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|
555 char *q; |
|
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|
556 p = strrchr(argv0, SEP); |
|
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|
557 /* Test for alternate separator */ |
|
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|
558 q = strrchr(p ? p : argv0, '/'); |
|
4256
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|
559 if (q != NULL) |
|
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|
560 p = q; |
|
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Changes to setpythonpath():
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|
561 if (p != NULL) { |
|
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|
562 n = p + 1 - argv0; |
|
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|
563 if (n > 1 && p[-1] != ':') |
|
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|
564 n--; /* Drop trailing separator */ |
|
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Changes to setpythonpath():
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|
565 } |
|
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Changes to setpythonpath():
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|
566 } |
|
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Changes to setpythonpath():
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|
567 #else /* All other filename syntaxes */ |
|
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|
568 if (argc > 0 && argv0 != NULL) |
|
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Expand one level of symbolic link in sys.argv[0] before inserting its
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|
569 p = strrchr(argv0, SEP); |
|
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|
570 if (p != NULL) { |
|
5340
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|
571 n = p + 1 - argv0; |
|
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|
572 #if SEP == '/' /* Special case for Unix filename syntax */ |
|
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|
573 if (n > 1) |
|
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|
574 n--; /* Drop trailing separator */ |
|
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|
575 #endif /* Unix */ |
|
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|
576 } |
|
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Changes to setpythonpath():
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|
577 #endif /* All others */ |
| 5372 | 578 a = PyString_FromStringAndSize(argv0, n); |
|
3877
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Always insert script directory in front of sys.path -- if there's no
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|
579 if (a == NULL) |
| 5372 | 580 Py_FatalError("no mem for sys.path insertion"); |
| 581 if (PyList_Insert(path, 0, a) < 0) | |
| 582 Py_FatalError("sys.path.insert(0) failed"); | |
| 583 Py_DECREF(a); | |
|
3806
93868c7a15c9
As a side effect of calling PySys_SetArgv (setpythonargv), the
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|
584 } |
| 5372 | 585 Py_DECREF(av); |
| 6 | 586 } |
|
8314
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|
587 |
|
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|
588 |
|
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|
589 /* APIs to write to sys.stdout or sys.stderr using a printf-like interface. |
|
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|
590 Adapted from code submitted by Just van Rossum. |
|
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|
591 |
|
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|
592 PySys_WriteStdout(format, ...) |
|
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|
593 PySys_WriteStderr(format, ...) |
|
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|
594 |
|
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|
595 The first function writes to sys.stdout; the second to sys.stderr. When |
|
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|
596 there is a problem, they write to the real (C level) stdout or stderr; |
|
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|
597 no exceptions are raised (but a pending exception may be cleared when a |
|
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|
598 new exception is caught). |
|
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|
599 |
|
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|
600 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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|
601 by a variable length argument list determined by the format string. |
|
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|
602 |
|
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|
603 *** WARNING *** |
|
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|
604 |
|
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|
605 The format should limit the total size of the formatted output string to |
|
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|
606 1000 bytes. In particular, this means that no unrestricted "%s" formats |
|
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|
607 should occur; these should be limited using "%.<N>s where <N> is a |
|
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|
608 decimal number calculated so that <N> plus the maximum size of other |
|
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|
609 formatted text does not exceed 1000 bytes. Also watch out for "%f", |
|
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|
610 which can print hundreds of digits for very large numbers. |
|
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|
611 |
|
f94d5ae642a9
New APIs to write to sys.stdout or sys.stderr using a printf-like interface.
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|
612 */ |
|
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|
613 |
|
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614 static void |
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615 mywrite(name, fp, format, va) |
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616 char *name; |
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617 FILE *fp; |
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618 const char *format; |
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619 va_list va; |
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620 { |
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621 PyObject *file; |
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622 |
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623 file = PySys_GetObject(name); |
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624 if (file == NULL || PyFile_AsFile(file) == fp) |
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625 vfprintf(fp, format, va); |
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626 else { |
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627 char buffer[1001]; |
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628 vsprintf(buffer, format, va); |
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629 if (PyFile_WriteString(buffer, file) != 0) { |
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630 PyErr_Clear(); |
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631 fputs(buffer, fp); |
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632 } |
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633 } |
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634 } |
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635 |
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636 void |
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637 #ifdef HAVE_STDARG_PROTOTYPES |
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638 PySys_WriteStdout(const char *format, ...) |
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639 #else |
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640 PySys_WriteStdout(va_alist) |
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641 va_dcl |
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642 #endif |
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643 { |
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644 va_list va; |
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645 |
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646 #ifdef HAVE_STDARG_PROTOTYPES |
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647 va_start(va, format); |
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648 #else |
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649 char *format; |
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650 va_start(va); |
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651 format = va_arg(va, char *); |
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652 #endif |
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653 mywrite("stdout", stdout, format, va); |
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654 va_end(va); |
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655 } |
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656 |
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657 void |
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658 #ifdef HAVE_STDARG_PROTOTYPES |
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659 PySys_WriteStderr(const char *format, ...) |
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660 #else |
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661 PySys_WriteStderr(va_alist) |
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662 va_dcl |
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663 #endif |
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664 { |
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665 va_list va; |
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666 |
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667 #ifdef HAVE_STDARG_PROTOTYPES |
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668 va_start(va, format); |
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669 #else |
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670 char *format; |
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671 va_start(va); |
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672 format = va_arg(va, char *); |
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673 #endif |
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674 mywrite("stderr", stderr, format, va); |
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675 va_end(va); |
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676 } |