Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 6285:337054e9d4fa legacy-trunk
Added support for __all__, which should be a list of modules to be
imported when the user says "from package import *".
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Mon, 08 Sep 1997 16:07:11 +0000 |
| parents | 1f2dfca52207 |
| children | b62a7a59414e |
| 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 #endif |
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58 |
| 5372 | 59 PyObject * |
| 60 PySys_GetObject(name) | |
| 6 | 61 char *name; |
| 62 { | |
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63 PyThreadState *tstate = PyThreadState_Get(); |
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64 PyObject *sd = tstate->interp->sysdict; |
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65 return PyDict_GetItemString(sd, name); |
| 6 | 66 } |
| 67 | |
| 68 FILE * | |
| 5372 | 69 PySys_GetFile(name, def) |
| 6 | 70 char *name; |
| 71 FILE *def; | |
| 72 { | |
| 73 FILE *fp = NULL; | |
| 5372 | 74 PyObject *v = PySys_GetObject(name); |
| 75 if (v != NULL && PyFile_Check(v)) | |
| 76 fp = PyFile_AsFile(v); | |
| 6 | 77 if (fp == NULL) |
| 78 fp = def; | |
| 79 return fp; | |
| 80 } | |
| 81 | |
| 82 int | |
| 5372 | 83 PySys_SetObject(name, v) |
| 6 | 84 char *name; |
| 5372 | 85 PyObject *v; |
| 6 | 86 { |
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87 PyThreadState *tstate = PyThreadState_Get(); |
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88 PyObject *sd = tstate->interp->sysdict; |
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89 if (v == NULL) { |
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90 if (PyDict_GetItemString(sd, name) == NULL) |
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91 return 0; |
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92 else |
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93 return PyDict_DelItemString(sd, name); |
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94 } |
| 6 | 95 else |
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96 return PyDict_SetItemString(sd, name, v); |
| 6 | 97 } |
| 98 | |
| 5372 | 99 static PyObject * |
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100 sys_exc_info(self, args) |
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101 PyObject *self; |
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102 PyObject *args; |
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103 { |
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104 PyThreadState *tstate; |
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105 if (!PyArg_Parse(args, "")) |
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106 return NULL; |
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107 tstate = PyThreadState_Get(); |
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108 return Py_BuildValue( |
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109 "(OOO)", |
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110 tstate->exc_type != NULL ? tstate->exc_type : Py_None, |
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111 tstate->exc_value != NULL ? tstate->exc_value : Py_None, |
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112 tstate->exc_traceback != NULL ? |
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113 tstate->exc_traceback : Py_None); |
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114 } |
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115 |
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116 static PyObject * |
| 6 | 117 sys_exit(self, args) |
| 5372 | 118 PyObject *self; |
| 119 PyObject *args; | |
| 6 | 120 { |
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121 /* Raise SystemExit so callers may catch it or clean up. */ |
| 5372 | 122 PyErr_SetObject(PyExc_SystemExit, args); |
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123 return NULL; |
| 6 | 124 } |
| 125 | |
| 5372 | 126 static PyObject * |
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127 sys_settrace(self, args) |
| 5372 | 128 PyObject *self; |
| 129 PyObject *args; | |
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130 { |
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131 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 132 if (args == Py_None) |
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133 args = NULL; |
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134 else |
| 5372 | 135 Py_XINCREF(args); |
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136 Py_XDECREF(tstate->sys_tracefunc); |
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137 tstate->sys_tracefunc = args; |
| 5372 | 138 Py_INCREF(Py_None); |
| 139 return Py_None; | |
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140 } |
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141 |
| 5372 | 142 static PyObject * |
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143 sys_setprofile(self, args) |
| 5372 | 144 PyObject *self; |
| 145 PyObject *args; | |
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146 { |
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147 PyThreadState *tstate = PyThreadState_Get(); |
| 5372 | 148 if (args == Py_None) |
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149 args = NULL; |
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150 else |
| 5372 | 151 Py_XINCREF(args); |
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152 Py_XDECREF(tstate->sys_profilefunc); |
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153 tstate->sys_profilefunc = args; |
| 5372 | 154 Py_INCREF(Py_None); |
| 155 return Py_None; | |
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156 } |
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157 |
| 5372 | 158 static PyObject * |
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159 sys_setcheckinterval(self, args) |
| 5372 | 160 PyObject *self; |
| 161 PyObject *args; | |
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162 { |
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163 PyThreadState *tstate = PyThreadState_Get(); |
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164 if (!PyArg_ParseTuple(args, "i", &tstate->interp->checkinterval)) |
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165 return NULL; |
| 5372 | 166 Py_INCREF(Py_None); |
| 167 return Py_None; | |
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168 } |
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169 |
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170 #ifdef USE_MALLOPT |
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171 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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172 #include <malloc.h> |
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173 |
| 5372 | 174 static PyObject * |
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175 sys_mdebug(self, args) |
| 5372 | 176 PyObject *self; |
| 177 PyObject *args; | |
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178 { |
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179 int flag; |
| 5372 | 180 if (!PyArg_Parse(args, "i", &flag)) |
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181 return NULL; |
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182 mallopt(M_DEBUG, flag); |
| 5372 | 183 Py_INCREF(Py_None); |
| 184 return Py_None; | |
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185 } |
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186 #endif /* USE_MALLOPT */ |
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187 |
| 5372 | 188 static PyObject * |
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189 sys_getrefcount(self, args) |
| 5372 | 190 PyObject *self; |
| 191 PyObject *args; | |
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192 { |
| 5372 | 193 PyObject *arg; |
| 194 if (!PyArg_Parse(args, "O", &arg)) | |
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195 return NULL; |
| 5372 | 196 return PyInt_FromLong((long) arg->ob_refcnt); |
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197 } |
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198 |
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199 #ifdef COUNT_ALLOCS |
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200 static PyObject * |
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201 sys_getcounts(self, args) |
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202 PyObject *self, *args; |
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203 { |
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204 extern PyObject *get_counts Py_PROTO((void)); |
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205 |
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206 if (!PyArg_Parse(args, "")) |
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207 return NULL; |
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208 return get_counts(); |
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209 } |
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210 #endif |
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211 |
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212 #ifdef Py_TRACE_REFS |
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213 /* Defined in objects.c because it uses static globals if that file */ |
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214 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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215 #endif |
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216 |
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217 #ifdef DYNAMIC_EXECUTION_PROFILE |
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218 /* Defined in ceval.c because it uses static globals if that file */ |
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219 extern PyObject *_Py_GetDXProfile Py_PROTO((PyObject *, PyObject *)); |
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220 #endif |
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221 |
| 5372 | 222 static PyMethodDef sys_methods[] = { |
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223 /* Might as well keep this in alphabetic order */ |
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224 {"exc_info", sys_exc_info, 0}, |
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225 {"exit", sys_exit, 0}, |
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226 #ifdef COUNT_ALLOCS |
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227 {"getcounts", sys_getcounts, 0}, |
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228 #endif |
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229 #ifdef DYNAMIC_EXECUTION_PROFILE |
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230 {"getdxp", _Py_GetDXProfile, 1}, |
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231 #endif |
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232 #ifdef Py_TRACE_REFS |
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233 {"getobjects", _Py_GetObjects, 1}, |
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234 #endif |
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235 {"getrefcount", sys_getrefcount, 0}, |
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236 #ifdef USE_MALLOPT |
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237 {"mdebug", sys_mdebug, 0}, |
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238 #endif |
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239 {"setcheckinterval", sys_setcheckinterval, 1}, |
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240 {"setprofile", sys_setprofile, 0}, |
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241 {"settrace", sys_settrace, 0}, |
| 86 | 242 {NULL, NULL} /* sentinel */ |
| 243 }; | |
| 244 | |
| 5372 | 245 static PyObject * |
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246 list_builtin_module_names() |
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247 { |
| 5372 | 248 PyObject *list = PyList_New(0); |
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249 int i; |
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250 if (list == NULL) |
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251 return NULL; |
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252 for (i = 0; _PyImport_Inittab[i].name != NULL; i++) { |
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253 PyObject *name = PyString_FromString( |
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254 _PyImport_Inittab[i].name); |
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255 if (name == NULL) |
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256 break; |
| 5372 | 257 PyList_Append(list, name); |
| 258 Py_DECREF(name); | |
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259 } |
| 5372 | 260 if (PyList_Sort(list) != 0) { |
| 261 Py_DECREF(list); | |
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262 list = NULL; |
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263 } |
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264 if (list) { |
| 5372 | 265 PyObject *v = PyList_AsTuple(list); |
| 266 Py_DECREF(list); | |
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267 list = v; |
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268 } |
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269 return list; |
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270 } |
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271 |
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272 PyObject * |
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273 _PySys_Init() |
| 6 | 274 { |
| 5372 | 275 extern int fclose Py_PROTO((FILE *)); |
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276 PyObject *m, *v, *sysdict; |
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277 PyObject *sysin, *sysout, *syserr; |
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278 |
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279 m = Py_InitModule("sys", sys_methods); |
| 5372 | 280 sysdict = PyModule_GetDict(m); |
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281 |
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282 sysin = PyFile_FromFile(stdin, "<stdin>", "r", NULL); |
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283 sysout = PyFile_FromFile(stdout, "<stdout>", "w", NULL); |
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284 syserr = PyFile_FromFile(stderr, "<stderr>", "w", NULL); |
| 5372 | 285 if (PyErr_Occurred()) |
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286 return NULL; |
| 5372 | 287 PyDict_SetItemString(sysdict, "stdin", sysin); |
| 288 PyDict_SetItemString(sysdict, "stdout", sysout); | |
| 289 PyDict_SetItemString(sysdict, "stderr", syserr); | |
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290 Py_XDECREF(sysin); |
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291 Py_XDECREF(sysout); |
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292 Py_XDECREF(syserr); |
| 5372 | 293 PyDict_SetItemString(sysdict, "version", |
| 294 v = PyString_FromString(Py_GetVersion())); | |
| 295 Py_XDECREF(v); | |
| 296 PyDict_SetItemString(sysdict, "copyright", | |
| 297 v = PyString_FromString(Py_GetCopyright())); | |
| 298 Py_XDECREF(v); | |
| 299 PyDict_SetItemString(sysdict, "platform", | |
| 300 v = PyString_FromString(Py_GetPlatform())); | |
| 301 Py_XDECREF(v); | |
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302 PyDict_SetItemString(sysdict, "executable", |
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303 v = PyString_FromString(Py_GetProgramFullPath())); |
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304 Py_XDECREF(v); |
| 5372 | 305 PyDict_SetItemString(sysdict, "prefix", |
| 306 v = PyString_FromString(Py_GetPrefix())); | |
| 307 Py_XDECREF(v); | |
| 308 PyDict_SetItemString(sysdict, "exec_prefix", | |
| 309 v = PyString_FromString(Py_GetExecPrefix())); | |
| 310 Py_XDECREF(v); | |
| 311 PyDict_SetItemString(sysdict, "maxint", | |
| 312 v = PyInt_FromLong(PyInt_GetMax())); | |
| 313 Py_XDECREF(v); | |
| 314 PyDict_SetItemString(sysdict, "builtin_module_names", | |
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315 v = list_builtin_module_names()); |
| 5372 | 316 Py_XDECREF(v); |
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317 #ifdef MS_COREDLL |
| 5372 | 318 PyDict_SetItemString(sysdict, "dllhandle", |
| 319 v = PyInt_FromLong((int)PyWin_DLLhModule)); | |
| 320 Py_XDECREF(v); | |
| 321 PyDict_SetItemString(sysdict, "winver", | |
| 322 v = PyString_FromString(MS_DLL_ID)); | |
| 323 Py_XDECREF(v); | |
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324 #endif |
| 5372 | 325 if (PyErr_Occurred()) |
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326 return NULL; |
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327 return m; |
| 86 | 328 } |
| 329 | |
| 5372 | 330 static PyObject * |
| 86 | 331 makepathobject(path, delim) |
| 332 char *path; | |
| 333 int delim; | |
| 334 { | |
| 335 int i, n; | |
| 336 char *p; | |
| 5372 | 337 PyObject *v, *w; |
| 6 | 338 |
| 86 | 339 n = 1; |
| 340 p = path; | |
| 341 while ((p = strchr(p, delim)) != NULL) { | |
| 342 n++; | |
| 343 p++; | |
| 344 } | |
| 5372 | 345 v = PyList_New(n); |
| 86 | 346 if (v == NULL) |
| 347 return NULL; | |
| 348 for (i = 0; ; i++) { | |
| 349 p = strchr(path, delim); | |
| 350 if (p == NULL) | |
| 351 p = strchr(path, '\0'); /* End of string */ | |
| 5372 | 352 w = PyString_FromStringAndSize(path, (int) (p - path)); |
| 86 | 353 if (w == NULL) { |
| 5372 | 354 Py_DECREF(v); |
| 86 | 355 return NULL; |
| 356 } | |
| 5372 | 357 PyList_SetItem(v, i, w); |
| 86 | 358 if (*p == '\0') |
| 359 break; | |
| 360 path = p+1; | |
| 361 } | |
| 362 return v; | |
| 363 } | |
| 364 | |
| 365 void | |
| 5372 | 366 PySys_SetPath(path) |
| 86 | 367 char *path; |
| 368 { | |
| 5372 | 369 PyObject *v; |
| 86 | 370 if ((v = makepathobject(path, DELIM)) == NULL) |
| 5372 | 371 Py_FatalError("can't create sys.path"); |
| 372 if (PySys_SetObject("path", v) != 0) | |
| 373 Py_FatalError("can't assign sys.path"); | |
| 374 Py_DECREF(v); | |
|
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375 } |
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376 |
| 5372 | 377 static PyObject * |
| 86 | 378 makeargvobject(argc, argv) |
| 379 int argc; | |
| 380 char **argv; | |
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381 { |
| 5372 | 382 PyObject *av; |
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383 if (argc <= 0 || argv == NULL) { |
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384 /* Ensure at least one (empty) argument is seen */ |
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385 static char *empty_argv[1] = {""}; |
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386 argv = empty_argv; |
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387 argc = 1; |
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388 } |
| 5372 | 389 av = PyList_New(argc); |
| 86 | 390 if (av != NULL) { |
| 391 int i; | |
| 392 for (i = 0; i < argc; i++) { | |
| 5372 | 393 PyObject *v = PyString_FromString(argv[i]); |
| 86 | 394 if (v == NULL) { |
| 5372 | 395 Py_DECREF(av); |
| 86 | 396 av = NULL; |
| 397 break; | |
| 398 } | |
| 5372 | 399 PyList_SetItem(av, i, v); |
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400 } |
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401 } |
| 86 | 402 return av; |
| 6 | 403 } |
| 404 | |
| 405 void | |
| 5372 | 406 PySys_SetArgv(argc, argv) |
| 86 | 407 int argc; |
| 408 char **argv; | |
| 6 | 409 { |
| 5372 | 410 PyObject *av = makeargvobject(argc, argv); |
| 411 PyObject *path = PySys_GetObject("path"); | |
| 86 | 412 if (av == NULL) |
| 5372 | 413 Py_FatalError("no mem for sys.argv"); |
| 414 if (PySys_SetObject("argv", av) != 0) | |
| 415 Py_FatalError("can't assign sys.argv"); | |
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416 if (path != NULL) { |
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417 char *argv0 = argv[0]; |
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418 char *p = NULL; |
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419 int n = 0; |
| 5372 | 420 PyObject *a; |
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421 #ifdef HAVE_READLINK |
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422 char link[MAXPATHLEN+1]; |
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423 char argv0copy[2*MAXPATHLEN+1]; |
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424 int nr = 0; |
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425 if (argc > 0 && argv0 != NULL) |
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426 nr = readlink(argv0, link, MAXPATHLEN); |
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427 if (nr > 0) { |
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428 /* It's a symlink */ |
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429 link[nr] = '\0'; |
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430 if (link[0] == SEP) |
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431 argv0 = link; /* Link to absolute path */ |
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432 else if (strchr(link, SEP) == NULL) |
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433 ; /* Link without path */ |
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434 else { |
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435 /* Must join(dirname(argv0), link) */ |
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436 char *q = strrchr(argv0, SEP); |
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437 if (q == NULL) |
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438 argv0 = link; /* argv0 without path */ |
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439 else { |
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440 /* Must make a copy */ |
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441 strcpy(argv0copy, argv0); |
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442 q = strrchr(argv0copy, SEP); |
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443 strcpy(q+1, link); |
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444 argv0 = argv0copy; |
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445 } |
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446 } |
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447 } |
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448 #endif /* HAVE_READLINK */ |
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449 #if SEP == '\\' /* Special case for MS filename syntax */ |
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450 if (argc > 0 && argv0 != NULL) { |
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451 char *q; |
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452 p = strrchr(argv0, SEP); |
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453 /* Test for alternate separator */ |
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454 q = strrchr(p ? p : argv0, '/'); |
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455 if (q != NULL) |
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456 p = q; |
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457 if (p != NULL) { |
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458 n = p + 1 - argv0; |
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459 if (n > 1 && p[-1] != ':') |
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460 n--; /* Drop trailing separator */ |
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461 } |
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462 } |
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463 #else /* All other filename syntaxes */ |
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464 if (argc > 0 && argv0 != NULL) |
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465 p = strrchr(argv0, SEP); |
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466 if (p != NULL) { |
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467 n = p + 1 - argv0; |
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468 #if SEP == '/' /* Special case for Unix filename syntax */ |
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469 if (n > 1) |
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470 n--; /* Drop trailing separator */ |
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471 #endif /* Unix */ |
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472 } |
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473 #endif /* All others */ |
| 5372 | 474 a = PyString_FromStringAndSize(argv0, n); |
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475 if (a == NULL) |
| 5372 | 476 Py_FatalError("no mem for sys.path insertion"); |
| 477 if (PyList_Insert(path, 0, a) < 0) | |
| 478 Py_FatalError("sys.path.insert(0) failed"); | |
| 479 Py_DECREF(a); | |
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480 } |
| 5372 | 481 Py_DECREF(av); |
| 6 | 482 } |