Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 5377:09597a423227 legacy-trunk
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| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Tue, 29 Apr 1997 20:42:30 +0000 |
| parents | 424922afc1bb |
| children | b7871ca930ad |
| 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 |
| 5372 | 51 PyObject *_PySys_TraceFunc, *_PySys_ProfileFunc; |
| 52 int _PySys_CheckInterval = 10; | |
| 6 | 53 |
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54 #if HAVE_UNISTD_H |
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55 #include <unistd.h> |
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56 #endif |
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57 |
| 5372 | 58 static PyObject *sysdict; |
| 6 | 59 |
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60 #ifdef MS_COREDLL |
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61 extern void *PyWin_DLLhModule; |
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62 #endif |
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63 |
| 5372 | 64 PyObject * |
| 65 PySys_GetObject(name) | |
| 6 | 66 char *name; |
| 67 { | |
| 5372 | 68 return PyDict_GetItemString(sysdict, name); |
| 6 | 69 } |
| 70 | |
| 71 FILE * | |
| 5372 | 72 PySys_GetFile(name, def) |
| 6 | 73 char *name; |
| 74 FILE *def; | |
| 75 { | |
| 76 FILE *fp = NULL; | |
| 5372 | 77 PyObject *v = PySys_GetObject(name); |
| 78 if (v != NULL && PyFile_Check(v)) | |
| 79 fp = PyFile_AsFile(v); | |
| 6 | 80 if (fp == NULL) |
| 81 fp = def; | |
| 82 return fp; | |
| 83 } | |
| 84 | |
| 85 int | |
| 5372 | 86 PySys_SetObject(name, v) |
| 6 | 87 char *name; |
| 5372 | 88 PyObject *v; |
| 6 | 89 { |
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90 if (v == NULL) { |
| 5372 | 91 if (PyDict_GetItemString(sysdict, name) == NULL) |
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92 return 0; |
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93 else |
| 5372 | 94 return PyDict_DelItemString(sysdict, name); |
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95 } |
| 6 | 96 else |
| 5372 | 97 return PyDict_SetItemString(sysdict, name, v); |
| 6 | 98 } |
| 99 | |
| 5372 | 100 static PyObject * |
| 6 | 101 sys_exit(self, args) |
| 5372 | 102 PyObject *self; |
| 103 PyObject *args; | |
| 6 | 104 { |
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105 /* Raise SystemExit so callers may catch it or clean up. */ |
| 5372 | 106 PyErr_SetObject(PyExc_SystemExit, args); |
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107 return NULL; |
| 6 | 108 } |
| 109 | |
| 5372 | 110 static PyObject * |
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111 sys_settrace(self, args) |
| 5372 | 112 PyObject *self; |
| 113 PyObject *args; | |
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114 { |
| 5372 | 115 if (args == Py_None) |
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116 args = NULL; |
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117 else |
| 5372 | 118 Py_XINCREF(args); |
| 119 Py_XDECREF(_PySys_TraceFunc); | |
| 120 _PySys_TraceFunc = args; | |
| 121 Py_INCREF(Py_None); | |
| 122 return Py_None; | |
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123 } |
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124 |
| 5372 | 125 static PyObject * |
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126 sys_setprofile(self, args) |
| 5372 | 127 PyObject *self; |
| 128 PyObject *args; | |
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129 { |
| 5372 | 130 if (args == Py_None) |
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131 args = NULL; |
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132 else |
| 5372 | 133 Py_XINCREF(args); |
| 134 Py_XDECREF(_PySys_ProfileFunc); | |
| 135 _PySys_ProfileFunc = args; | |
| 136 Py_INCREF(Py_None); | |
| 137 return Py_None; | |
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138 } |
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139 |
| 5372 | 140 static PyObject * |
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141 sys_setcheckinterval(self, args) |
| 5372 | 142 PyObject *self; |
| 143 PyObject *args; | |
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144 { |
| 5372 | 145 if (!PyArg_ParseTuple(args, "i", &_PySys_CheckInterval)) |
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146 return NULL; |
| 5372 | 147 Py_INCREF(Py_None); |
| 148 return Py_None; | |
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149 } |
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150 |
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151 #ifdef USE_MALLOPT |
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152 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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153 #include <malloc.h> |
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154 |
| 5372 | 155 static PyObject * |
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156 sys_mdebug(self, args) |
| 5372 | 157 PyObject *self; |
| 158 PyObject *args; | |
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159 { |
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160 int flag; |
| 5372 | 161 if (!PyArg_Parse(args, "i", &flag)) |
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162 return NULL; |
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163 mallopt(M_DEBUG, flag); |
| 5372 | 164 Py_INCREF(Py_None); |
| 165 return Py_None; | |
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166 } |
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167 #endif /* USE_MALLOPT */ |
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168 |
| 5372 | 169 static PyObject * |
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170 sys_getrefcount(self, args) |
| 5372 | 171 PyObject *self; |
| 172 PyObject *args; | |
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173 { |
| 5372 | 174 PyObject *arg; |
| 175 if (!PyArg_Parse(args, "O", &arg)) | |
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176 return NULL; |
| 5372 | 177 return PyInt_FromLong((long) arg->ob_refcnt); |
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178 } |
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179 |
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180 #ifdef COUNT_ALLOCS |
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181 static PyObject * |
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182 sys_getcounts(self, args) |
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183 PyObject *self, *args; |
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184 { |
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185 extern PyObject *get_counts Py_PROTO((void)); |
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186 |
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187 if (!PyArg_Parse(args, "")) |
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188 return NULL; |
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189 return get_counts(); |
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190 } |
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191 #endif |
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192 |
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193 #ifdef Py_TRACE_REFS |
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194 /* Defined in objects.c because it uses static globals if that file */ |
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195 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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196 #endif |
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197 |
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198 #ifdef DYNAMIC_EXECUTION_PROFILE |
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199 /* Defined in ceval.c because it uses static globals if that file */ |
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200 extern PyObject *_Py_GetDXProfile Py_PROTO((PyObject *, PyObject *)); |
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201 #endif |
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202 |
| 5372 | 203 static PyMethodDef sys_methods[] = { |
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204 /* Might as well keep this in alphabetic order */ |
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205 {"exit", sys_exit, 0}, |
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206 #ifdef COUNT_ALLOCS |
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207 {"getcounts", sys_getcounts, 0}, |
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208 #endif |
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209 #ifdef DYNAMIC_EXECUTION_PROFILE |
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210 {"getdxp", _Py_GetDXProfile, 1}, |
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211 #endif |
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212 #ifdef Py_TRACE_REFS |
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213 {"getobjects", _Py_GetObjects, 1}, |
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214 #endif |
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215 {"getrefcount", sys_getrefcount, 0}, |
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216 #ifdef USE_MALLOPT |
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217 {"mdebug", sys_mdebug, 0}, |
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218 #endif |
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219 {"setcheckinterval", sys_setcheckinterval, 1}, |
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220 {"setprofile", sys_setprofile, 0}, |
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221 {"settrace", sys_settrace, 0}, |
| 86 | 222 {NULL, NULL} /* sentinel */ |
| 223 }; | |
| 224 | |
| 5372 | 225 static PyObject *sysin, *sysout, *syserr; |
| 6 | 226 |
| 5372 | 227 static PyObject * |
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228 list_builtin_module_names() |
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229 { |
| 5372 | 230 PyObject *list = PyList_New(0); |
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231 int i; |
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232 if (list == NULL) |
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233 return NULL; |
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234 for (i = 0; _PyImport_Inittab[i].name != NULL; i++) { |
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235 PyObject *name = PyString_FromString(_PyImport_Inittab[i].name); |
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236 if (name == NULL) |
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237 break; |
| 5372 | 238 PyList_Append(list, name); |
| 239 Py_DECREF(name); | |
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240 } |
| 5372 | 241 if (PyList_Sort(list) != 0) { |
| 242 Py_DECREF(list); | |
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243 list = NULL; |
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244 } |
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245 if (list) { |
| 5372 | 246 PyObject *v = PyList_AsTuple(list); |
| 247 Py_DECREF(list); | |
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248 list = v; |
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249 } |
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250 return list; |
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251 } |
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252 |
| 6 | 253 void |
| 5372 | 254 PySys_Init() |
| 6 | 255 { |
| 5372 | 256 extern long PyInt_GetMax Py_PROTO((void)); |
| 257 extern char *Py_GetVersion Py_PROTO((void)); | |
| 258 extern char *Py_GetCopyright Py_PROTO((void)); | |
| 259 extern char *Py_GetPlatform Py_PROTO((void)); | |
| 260 extern char *Py_GetPrefix Py_PROTO((void)); | |
| 261 extern char *Py_GetExecPrefix Py_PROTO((void)); | |
| 262 extern int fclose Py_PROTO((FILE *)); | |
| 263 PyObject *m = Py_InitModule("sys", sys_methods); | |
| 264 PyObject *v; | |
| 265 sysdict = PyModule_GetDict(m); | |
| 266 Py_INCREF(sysdict); | |
| 6 | 267 /* NB keep an extra ref to the std files to avoid closing them |
| 268 when the user deletes them */ | |
| 5372 | 269 sysin = PyFile_FromFile(stdin, "<stdin>", "r", fclose); |
| 270 sysout = PyFile_FromFile(stdout, "<stdout>", "w", fclose); | |
| 271 syserr = PyFile_FromFile(stderr, "<stderr>", "w", fclose); | |
| 272 if (PyErr_Occurred()) | |
| 273 Py_FatalError("can't initialize sys.std{in,out,err}"); | |
| 274 PyDict_SetItemString(sysdict, "stdin", sysin); | |
| 275 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 276 PyDict_SetItemString(sysdict, "stderr", syserr); | |
| 277 PyDict_SetItemString(sysdict, "version", | |
| 278 v = PyString_FromString(Py_GetVersion())); | |
| 279 Py_XDECREF(v); | |
| 280 PyDict_SetItemString(sysdict, "copyright", | |
| 281 v = PyString_FromString(Py_GetCopyright())); | |
| 282 Py_XDECREF(v); | |
| 283 PyDict_SetItemString(sysdict, "platform", | |
| 284 v = PyString_FromString(Py_GetPlatform())); | |
| 285 Py_XDECREF(v); | |
| 286 PyDict_SetItemString(sysdict, "prefix", | |
| 287 v = PyString_FromString(Py_GetPrefix())); | |
| 288 Py_XDECREF(v); | |
| 289 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 290 v = PyString_FromString(Py_GetExecPrefix())); | |
| 291 Py_XDECREF(v); | |
| 292 PyDict_SetItemString(sysdict, "maxint", | |
| 293 v = PyInt_FromLong(PyInt_GetMax())); | |
| 294 Py_XDECREF(v); | |
| 295 PyDict_SetItemString(sysdict, "modules", PyImport_GetModuleDict()); | |
| 296 PyDict_SetItemString(sysdict, "builtin_module_names", | |
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297 v = list_builtin_module_names()); |
| 5372 | 298 Py_XDECREF(v); |
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299 #ifdef MS_COREDLL |
| 5372 | 300 PyDict_SetItemString(sysdict, "dllhandle", |
| 301 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 302 Py_XDECREF(v); | |
| 303 PyDict_SetItemString(sysdict, "winver", | |
| 304 v = PyString_FromString(MS_DLL_ID)); | |
| 305 Py_XDECREF(v); | |
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306 #endif |
| 5372 | 307 if (PyErr_Occurred()) |
| 308 Py_FatalError("can't insert sys.* objects in sys dict"); | |
| 86 | 309 } |
| 310 | |
| 5372 | 311 static PyObject * |
| 86 | 312 makepathobject(path, delim) |
| 313 char *path; | |
| 314 int delim; | |
| 315 { | |
| 316 int i, n; | |
| 317 char *p; | |
| 5372 | 318 PyObject *v, *w; |
| 6 | 319 |
| 86 | 320 n = 1; |
| 321 p = path; | |
| 322 while ((p = strchr(p, delim)) != NULL) { | |
| 323 n++; | |
| 324 p++; | |
| 325 } | |
| 5372 | 326 v = PyList_New(n); |
| 86 | 327 if (v == NULL) |
| 328 return NULL; | |
| 329 for (i = 0; ; i++) { | |
| 330 p = strchr(path, delim); | |
| 331 if (p == NULL) | |
| 332 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 333 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 334 if (w == NULL) { |
| 5372 | 335 Py_DECREF(v); |
| 86 | 336 return NULL; |
| 337 } | |
| 5372 | 338 PyList_SetItem(v, i, w); |
| 86 | 339 if (*p == '\0') |
| 340 break; | |
| 341 path = p+1; | |
| 342 } | |
| 343 return v; | |
| 344 } | |
| 345 | |
| 346 void | |
| 5372 | 347 PySys_SetPath(path) |
| 86 | 348 char *path; |
| 349 { | |
| 5372 | 350 PyObject *v; |
| 86 | 351 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 352 Py_FatalError("can't create sys.path"); |
| 353 if (PySys_SetObject("path", v) != 0) | |
| 354 Py_FatalError("can't assign sys.path"); | |
| 355 Py_DECREF(v); | |
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356 } |
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357 |
| 5372 | 358 static PyObject * |
| 86 | 359 makeargvobject(argc, argv) |
| 360 int argc; | |
| 361 char **argv; | |
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362 { |
| 5372 | 363 PyObject *av; |
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364 if (argc <= 0 || argv == NULL) { |
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365 /* Ensure at least one (empty) argument is seen */ |
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366 static char *empty_argv[1] = {""}; |
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367 argv = empty_argv; |
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368 argc = 1; |
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369 } |
| 5372 | 370 av = PyList_New(argc); |
| 86 | 371 if (av != NULL) { |
| 372 int i; | |
| 373 for (i = 0; i < argc; i++) { | |
| 5372 | 374 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 375 if (v == NULL) { |
| 5372 | 376 Py_DECREF(av); |
| 86 | 377 av = NULL; |
| 378 break; | |
| 379 } | |
| 5372 | 380 PyList_SetItem(av, i, v); |
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381 } |
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382 } |
| 86 | 383 return av; |
| 6 | 384 } |
| 385 | |
| 386 void | |
| 5372 | 387 PySys_SetArgv(argc, argv) |
| 86 | 388 int argc; |
| 389 char **argv; | |
| 6 | 390 { |
| 5372 | 391 PyObject *av = makeargvobject(argc, argv); |
| 392 PyObject *path = PySys_GetObject("path"); | |
| 86 | 393 if (av == NULL) |
| 5372 | 394 Py_FatalError("no mem for sys.argv"); |
| 395 if (PySys_SetObject("argv", av) != 0) | |
| 396 Py_FatalError("can't assign sys.argv"); | |
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397 if (path != NULL) { |
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398 char *argv0 = argv[0]; |
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399 char *p = NULL; |
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400 int n = 0; |
| 5372 | 401 PyObject *a; |
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402 #ifdef HAVE_READLINK |
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403 char link[MAXPATHLEN+1]; |
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404 char argv0copy[2*MAXPATHLEN+1]; |
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405 int nr = 0; |
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406 if (argc > 0 && argv0 != NULL) |
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407 nr = readlink(argv0, link, MAXPATHLEN); |
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408 if (nr > 0) { |
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409 /* It's a symlink */ |
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410 link[nr] = '\0'; |
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411 if (link[0] == SEP) |
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412 argv0 = link; /* Link to absolute path */ |
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413 else if (strchr(link, SEP) == NULL) |
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414 ; /* Link without path */ |
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415 else { |
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416 /* Must join(dirname(argv0), link) */ |
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417 char *q = strrchr(argv0, SEP); |
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418 if (q == NULL) |
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419 argv0 = link; /* argv0 without path */ |
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420 else { |
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421 /* Must make a copy */ |
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422 strcpy(argv0copy, argv0); |
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423 q = strrchr(argv0copy, SEP); |
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424 strcpy(q+1, link); |
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425 argv0 = argv0copy; |
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426 } |
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427 } |
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428 } |
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429 #endif /* HAVE_READLINK */ |
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430 #if SEP == '\\' /* Special case for MS filename syntax */ |
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431 if (argc > 0 && argv0 != NULL) { |
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432 char *q; |
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433 p = strrchr(argv0, SEP); |
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434 /* Test for alternate separator */ |
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435 q = strrchr(p ? p : argv0, '/'); |
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436 if (q != NULL) |
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437 p = q; |
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438 if (p != NULL) { |
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439 n = p + 1 - argv0; |
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440 if (n > 1 && p[-1] != ':') |
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441 n--; /* Drop trailing separator */ |
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442 } |
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443 } |
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444 #else /* All other filename syntaxes */ |
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445 if (argc > 0 && argv0 != NULL) |
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446 p = strrchr(argv0, SEP); |
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447 if (p != NULL) { |
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448 n = p + 1 - argv0; |
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449 #if SEP == '/' /* Special case for Unix filename syntax */ |
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450 if (n > 1) |
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451 n--; /* Drop trailing separator */ |
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452 #endif /* Unix */ |
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453 } |
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454 #endif /* All others */ |
| 5372 | 455 a = PyString_FromStringAndSize(argv0, n); |
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456 if (a == NULL) |
| 5372 | 457 Py_FatalError("no mem for sys.path insertion"); |
| 458 if (PyList_Insert(path, 0, a) < 0) | |
| 459 Py_FatalError("sys.path.insert(0) failed"); | |
| 460 Py_DECREF(a); | |
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461 } |
| 5372 | 462 Py_DECREF(av); |
| 6 | 463 } |