Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 6550:f406ec35bfca legacy-trunk
Get rid of another reference to _PyImport_Inittab (now a static array)
that should be PyImport_Inittab (a new pointer initialized to point to
the array).
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Tue, 04 Nov 1997 17:04:34 +0000 |
| parents | b62a7a59414e |
| children | c7454ca7d3ac |
| 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 PyObject * |
| 6 | 119 sys_exit(self, args) |
| 5372 | 120 PyObject *self; |
| 121 PyObject *args; | |
| 6 | 122 { |
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123 /* Raise SystemExit so callers may catch it or clean up. */ |
| 5372 | 124 PyErr_SetObject(PyExc_SystemExit, args); |
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125 return NULL; |
| 6 | 126 } |
| 127 | |
| 5372 | 128 static PyObject * |
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129 sys_settrace(self, args) |
| 5372 | 130 PyObject *self; |
| 131 PyObject *args; | |
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132 { |
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133 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 134 if (args == Py_None) |
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135 args = NULL; |
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136 else |
| 5372 | 137 Py_XINCREF(args); |
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138 Py_XDECREF(tstate->sys_tracefunc); |
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139 tstate->sys_tracefunc = args; |
| 5372 | 140 Py_INCREF(Py_None); |
| 141 return Py_None; | |
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142 } |
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143 |
| 5372 | 144 static PyObject * |
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145 sys_setprofile(self, args) |
| 5372 | 146 PyObject *self; |
| 147 PyObject *args; | |
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148 { |
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149 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 150 if (args == Py_None) |
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151 args = NULL; |
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152 else |
| 5372 | 153 Py_XINCREF(args); |
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154 Py_XDECREF(tstate->sys_profilefunc); |
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155 tstate->sys_profilefunc = args; |
| 5372 | 156 Py_INCREF(Py_None); |
| 157 return Py_None; | |
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158 } |
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159 |
| 5372 | 160 static PyObject * |
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161 sys_setcheckinterval(self, args) |
| 5372 | 162 PyObject *self; |
| 163 PyObject *args; | |
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164 { |
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165 PyThreadState *tstate = PyThreadState_Get(); |
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166 if (!PyArg_ParseTuple(args, "i", &tstate->interp->checkinterval)) |
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167 return NULL; |
| 5372 | 168 Py_INCREF(Py_None); |
| 169 return Py_None; | |
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170 } |
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171 |
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172 #ifdef USE_MALLOPT |
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173 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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174 #include <malloc.h> |
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175 |
| 5372 | 176 static PyObject * |
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177 sys_mdebug(self, args) |
| 5372 | 178 PyObject *self; |
| 179 PyObject *args; | |
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180 { |
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181 int flag; |
| 5372 | 182 if (!PyArg_Parse(args, "i", &flag)) |
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183 return NULL; |
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184 mallopt(M_DEBUG, flag); |
| 5372 | 185 Py_INCREF(Py_None); |
| 186 return Py_None; | |
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187 } |
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188 #endif /* USE_MALLOPT */ |
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189 |
| 5372 | 190 static PyObject * |
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191 sys_getrefcount(self, args) |
| 5372 | 192 PyObject *self; |
| 193 PyObject *args; | |
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194 { |
| 5372 | 195 PyObject *arg; |
| 196 if (!PyArg_Parse(args, "O", &arg)) | |
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197 return NULL; |
| 5372 | 198 return PyInt_FromLong((long) arg->ob_refcnt); |
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199 } |
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200 |
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201 #ifdef COUNT_ALLOCS |
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202 static PyObject * |
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203 sys_getcounts(self, args) |
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204 PyObject *self, *args; |
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205 { |
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206 extern PyObject *get_counts Py_PROTO((void)); |
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207 |
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208 if (!PyArg_Parse(args, "")) |
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209 return NULL; |
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210 return get_counts(); |
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211 } |
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212 #endif |
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213 |
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214 #ifdef Py_TRACE_REFS |
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215 /* Defined in objects.c because it uses static globals if that file */ |
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216 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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217 #endif |
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218 |
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219 #ifdef DYNAMIC_EXECUTION_PROFILE |
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220 /* Defined in ceval.c because it uses static globals if that file */ |
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221 extern PyObject *_Py_GetDXProfile Py_PROTO((PyObject *, PyObject *)); |
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222 #endif |
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223 |
| 5372 | 224 static PyMethodDef sys_methods[] = { |
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225 /* Might as well keep this in alphabetic order */ |
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226 {"exc_info", sys_exc_info, 0}, |
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227 {"exit", sys_exit, 0}, |
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228 #ifdef COUNT_ALLOCS |
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229 {"getcounts", sys_getcounts, 0}, |
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230 #endif |
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231 #ifdef DYNAMIC_EXECUTION_PROFILE |
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232 {"getdxp", _Py_GetDXProfile, 1}, |
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233 #endif |
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234 #ifdef Py_TRACE_REFS |
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235 {"getobjects", _Py_GetObjects, 1}, |
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236 #endif |
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237 {"getrefcount", sys_getrefcount, 0}, |
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238 #ifdef USE_MALLOPT |
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239 {"mdebug", sys_mdebug, 0}, |
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240 #endif |
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241 {"setcheckinterval", sys_setcheckinterval, 1}, |
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242 {"setprofile", sys_setprofile, 0}, |
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243 {"settrace", sys_settrace, 0}, |
| 86 | 244 {NULL, NULL} /* sentinel */ |
| 245 }; | |
| 246 | |
| 5372 | 247 static PyObject * |
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248 list_builtin_module_names() |
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249 { |
| 5372 | 250 PyObject *list = PyList_New(0); |
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251 int i; |
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252 if (list == NULL) |
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253 return NULL; |
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254 for (i = 0; PyImport_Inittab[i].name != NULL; i++) { |
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255 PyObject *name = PyString_FromString( |
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256 PyImport_Inittab[i].name); |
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257 if (name == NULL) |
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258 break; |
| 5372 | 259 PyList_Append(list, name); |
| 260 Py_DECREF(name); | |
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261 } |
| 5372 | 262 if (PyList_Sort(list) != 0) { |
| 263 Py_DECREF(list); | |
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264 list = NULL; |
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265 } |
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266 if (list) { |
| 5372 | 267 PyObject *v = PyList_AsTuple(list); |
| 268 Py_DECREF(list); | |
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269 list = v; |
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270 } |
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271 return list; |
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272 } |
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273 |
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274 PyObject * |
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275 _PySys_Init() |
| 6 | 276 { |
| 5372 | 277 extern int fclose Py_PROTO((FILE *)); |
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278 PyObject *m, *v, *sysdict; |
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279 PyObject *sysin, *sysout, *syserr; |
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280 |
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281 m = Py_InitModule("sys", sys_methods); |
| 5372 | 282 sysdict = PyModule_GetDict(m); |
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283 |
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284 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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285 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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286 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 287 if (PyErr_Occurred()) |
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288 return NULL; |
| 5372 | 289 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 290 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 291 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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292 Py_XDECREF(sysin); |
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293 Py_XDECREF(sysout); |
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294 Py_XDECREF(syserr); |
| 5372 | 295 PyDict_SetItemString(sysdict, "version", |
| 296 v = PyString_FromString(Py_GetVersion())); | |
| 297 Py_XDECREF(v); | |
| 298 PyDict_SetItemString(sysdict, "copyright", | |
| 299 v = PyString_FromString(Py_GetCopyright())); | |
| 300 Py_XDECREF(v); | |
| 301 PyDict_SetItemString(sysdict, "platform", | |
| 302 v = PyString_FromString(Py_GetPlatform())); | |
| 303 Py_XDECREF(v); | |
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304 PyDict_SetItemString(sysdict, "executable", |
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305 v = PyString_FromString(Py_GetProgramFullPath())); |
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306 Py_XDECREF(v); |
| 5372 | 307 PyDict_SetItemString(sysdict, "prefix", |
| 308 v = PyString_FromString(Py_GetPrefix())); | |
| 309 Py_XDECREF(v); | |
| 310 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 311 v = PyString_FromString(Py_GetExecPrefix())); | |
| 312 Py_XDECREF(v); | |
| 313 PyDict_SetItemString(sysdict, "maxint", | |
| 314 v = PyInt_FromLong(PyInt_GetMax())); | |
| 315 Py_XDECREF(v); | |
| 316 PyDict_SetItemString(sysdict, "builtin_module_names", | |
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317 v = list_builtin_module_names()); |
| 5372 | 318 Py_XDECREF(v); |
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319 #ifdef MS_COREDLL |
| 5372 | 320 PyDict_SetItemString(sysdict, "dllhandle", |
| 321 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 322 Py_XDECREF(v); | |
| 323 PyDict_SetItemString(sysdict, "winver", | |
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324 v = PyString_FromString(PyWin_DLLVersionString)); |
| 5372 | 325 Py_XDECREF(v); |
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326 #endif |
| 5372 | 327 if (PyErr_Occurred()) |
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328 return NULL; |
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329 return m; |
| 86 | 330 } |
| 331 | |
| 5372 | 332 static PyObject * |
| 86 | 333 makepathobject(path, delim) |
| 334 char *path; | |
| 335 int delim; | |
| 336 { | |
| 337 int i, n; | |
| 338 char *p; | |
| 5372 | 339 PyObject *v, *w; |
| 6 | 340 |
| 86 | 341 n = 1; |
| 342 p = path; | |
| 343 while ((p = strchr(p, delim)) != NULL) { | |
| 344 n++; | |
| 345 p++; | |
| 346 } | |
| 5372 | 347 v = PyList_New(n); |
| 86 | 348 if (v == NULL) |
| 349 return NULL; | |
| 350 for (i = 0; ; i++) { | |
| 351 p = strchr(path, delim); | |
| 352 if (p == NULL) | |
| 353 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 354 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 355 if (w == NULL) { |
| 5372 | 356 Py_DECREF(v); |
| 86 | 357 return NULL; |
| 358 } | |
| 5372 | 359 PyList_SetItem(v, i, w); |
| 86 | 360 if (*p == '\0') |
| 361 break; | |
| 362 path = p+1; | |
| 363 } | |
| 364 return v; | |
| 365 } | |
| 366 | |
| 367 void | |
| 5372 | 368 PySys_SetPath(path) |
| 86 | 369 char *path; |
| 370 { | |
| 5372 | 371 PyObject *v; |
| 86 | 372 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 373 Py_FatalError("can't create sys.path"); |
| 374 if (PySys_SetObject("path", v) != 0) | |
| 375 Py_FatalError("can't assign sys.path"); | |
| 376 Py_DECREF(v); | |
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377 } |
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378 |
| 5372 | 379 static PyObject * |
| 86 | 380 makeargvobject(argc, argv) |
| 381 int argc; | |
| 382 char **argv; | |
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383 { |
| 5372 | 384 PyObject *av; |
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385 if (argc <= 0 || argv == NULL) { |
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386 /* Ensure at least one (empty) argument is seen */ |
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387 static char *empty_argv[1] = {""}; |
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388 argv = empty_argv; |
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389 argc = 1; |
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390 } |
| 5372 | 391 av = PyList_New(argc); |
| 86 | 392 if (av != NULL) { |
| 393 int i; | |
| 394 for (i = 0; i < argc; i++) { | |
| 5372 | 395 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 396 if (v == NULL) { |
| 5372 | 397 Py_DECREF(av); |
| 86 | 398 av = NULL; |
| 399 break; | |
| 400 } | |
| 5372 | 401 PyList_SetItem(av, i, v); |
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402 } |
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403 } |
| 86 | 404 return av; |
| 6 | 405 } |
| 406 | |
| 407 void | |
| 5372 | 408 PySys_SetArgv(argc, argv) |
| 86 | 409 int argc; |
| 410 char **argv; | |
| 6 | 411 { |
| 5372 | 412 PyObject *av = makeargvobject(argc, argv); |
| 413 PyObject *path = PySys_GetObject("path"); | |
| 86 | 414 if (av == NULL) |
| 5372 | 415 Py_FatalError("no mem for sys.argv"); |
| 416 if (PySys_SetObject("argv", av) != 0) | |
| 417 Py_FatalError("can't assign sys.argv"); | |
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418 if (path != NULL) { |
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419 char *argv0 = argv[0]; |
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420 char *p = NULL; |
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421 int n = 0; |
| 5372 | 422 PyObject *a; |
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423 #ifdef HAVE_READLINK |
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424 char link[MAXPATHLEN+1]; |
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425 char argv0copy[2*MAXPATHLEN+1]; |
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426 int nr = 0; |
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427 if (argc > 0 && argv0 != NULL) |
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428 nr = readlink(argv0, link, MAXPATHLEN); |
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429 if (nr > 0) { |
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430 /* It's a symlink */ |
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431 link[nr] = '\0'; |
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432 if (link[0] == SEP) |
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433 argv0 = link; /* Link to absolute path */ |
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434 else if (strchr(link, SEP) == NULL) |
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435 ; /* Link without path */ |
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436 else { |
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437 /* Must join(dirname(argv0), link) */ |
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438 char *q = strrchr(argv0, SEP); |
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439 if (q == NULL) |
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440 argv0 = link; /* argv0 without path */ |
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441 else { |
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442 /* Must make a copy */ |
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443 strcpy(argv0copy, argv0); |
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444 q = strrchr(argv0copy, SEP); |
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445 strcpy(q+1, link); |
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446 argv0 = argv0copy; |
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447 } |
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448 } |
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449 } |
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450 #endif /* HAVE_READLINK */ |
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451 #if SEP == '\\' /* Special case for MS filename syntax */ |
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452 if (argc > 0 && argv0 != NULL) { |
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453 char *q; |
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454 p = strrchr(argv0, SEP); |
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455 /* Test for alternate separator */ |
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456 q = strrchr(p ? p : argv0, '/'); |
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457 if (q != NULL) |
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458 p = q; |
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459 if (p != NULL) { |
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460 n = p + 1 - argv0; |
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461 if (n > 1 && p[-1] != ':') |
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462 n--; /* Drop trailing separator */ |
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463 } |
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464 } |
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465 #else /* All other filename syntaxes */ |
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466 if (argc > 0 && argv0 != NULL) |
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467 p = strrchr(argv0, SEP); |
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468 if (p != NULL) { |
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469 n = p + 1 - argv0; |
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470 #if SEP == '/' /* Special case for Unix filename syntax */ |
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471 if (n > 1) |
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472 n--; /* Drop trailing separator */ |
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473 #endif /* Unix */ |
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474 } |
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475 #endif /* All others */ |
| 5372 | 476 a = PyString_FromStringAndSize(argv0, n); |
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477 if (a == NULL) |
| 5372 | 478 Py_FatalError("no mem for sys.path insertion"); |
| 479 if (PyList_Insert(path, 0, a) < 0) | |
| 480 Py_FatalError("sys.path.insert(0) failed"); | |
| 481 Py_DECREF(a); | |
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482 } |
| 5372 | 483 Py_DECREF(av); |
| 6 | 484 } |