Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 4256:e225e70fd657 legacy-trunk
Changes to setpythonpath():
Test for / as well as for SEP for MS filenames.
Drop trailing separator from sys.path[0] for MS and Unix filenames.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Tue, 10 Sep 1996 14:44:21 +0000 |
| parents | c80c515999b9 |
| children | 1427d61f1307 |
| 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 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 6 | 25 /* System module */ |
| 26 | |
| 27 /* | |
| 28 Various bits of information used by the interpreter are collected in | |
| 29 module 'sys'. | |
| 86 | 30 Function member: |
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31 - exit(sts): raise SystemExit |
| 6 | 32 Data members: |
| 33 - stdin, stdout, stderr: standard file objects | |
| 86 | 34 - modules: the table of modules (dictionary) |
| 6 | 35 - path: module search path (list of strings) |
| 86 | 36 - argv: script arguments (list of strings) |
| 37 - ps1, ps2: optional primary and secondary prompts (strings) | |
| 6 | 38 */ |
| 39 | |
| 86 | 40 #include "allobjects.h" |
| 41 | |
| 42 #include "sysmodule.h" | |
| 43 #include "import.h" | |
| 44 #include "modsupport.h" | |
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45 #include "osdefs.h" |
| 86 | 46 |
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47 object *sys_trace, *sys_profile; |
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48 int sys_checkinterval = 10; |
| 6 | 49 |
| 50 static object *sysdict; | |
| 51 | |
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52 #ifdef NT |
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53 extern void *PyWin_DLLhModule; |
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54 #endif |
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55 |
| 6 | 56 object * |
| 57 sysget(name) | |
| 58 char *name; | |
| 59 { | |
| 60 return dictlookup(sysdict, name); | |
| 61 } | |
| 62 | |
| 63 FILE * | |
| 64 sysgetfile(name, def) | |
| 65 char *name; | |
| 66 FILE *def; | |
| 67 { | |
| 68 FILE *fp = NULL; | |
| 69 object *v = sysget(name); | |
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70 if (v != NULL && is_fileobject(v)) |
| 6 | 71 fp = getfilefile(v); |
| 72 if (fp == NULL) | |
| 73 fp = def; | |
| 74 return fp; | |
| 75 } | |
| 76 | |
| 77 int | |
| 78 sysset(name, v) | |
| 79 char *name; | |
| 80 object *v; | |
| 81 { | |
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82 if (v == NULL) { |
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83 if (dictlookup(sysdict, name) == NULL) |
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84 return 0; |
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85 else |
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86 return dictremove(sysdict, name); |
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87 } |
| 6 | 88 else |
| 89 return dictinsert(sysdict, name, v); | |
| 90 } | |
| 91 | |
| 92 static object * | |
| 93 sys_exit(self, args) | |
| 94 object *self; | |
| 95 object *args; | |
| 96 { | |
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97 /* Raise SystemExit so callers may catch it or clean up. */ |
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98 err_setval(SystemExit, args); |
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99 return NULL; |
| 6 | 100 } |
| 101 | |
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102 static object * |
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103 sys_settrace(self, args) |
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104 object *self; |
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105 object *args; |
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106 { |
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107 if (args == None) |
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108 args = NULL; |
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109 else |
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110 XINCREF(args); |
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111 XDECREF(sys_trace); |
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112 sys_trace = args; |
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113 INCREF(None); |
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114 return None; |
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115 } |
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116 |
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117 static object * |
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118 sys_setprofile(self, args) |
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119 object *self; |
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120 object *args; |
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121 { |
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122 if (args == None) |
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123 args = NULL; |
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124 else |
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125 XINCREF(args); |
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126 XDECREF(sys_profile); |
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127 sys_profile = args; |
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128 INCREF(None); |
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129 return None; |
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130 } |
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131 |
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132 static object * |
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133 sys_setcheckinterval(self, args) |
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134 object *self; |
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135 object *args; |
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136 { |
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137 if (!newgetargs(args, "i", &sys_checkinterval)) |
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138 return NULL; |
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139 INCREF(None); |
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140 return None; |
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141 } |
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142 |
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143 #ifdef USE_MALLOPT |
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144 /* Link with -lmalloc (or -lmpc) on an SGI */ |
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145 #include <malloc.h> |
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146 |
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147 static object * |
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148 sys_mdebug(self, args) |
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149 object *self; |
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150 object *args; |
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151 { |
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152 int flag; |
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153 if (!getargs(args, "i", &flag)) |
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154 return NULL; |
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155 mallopt(M_DEBUG, flag); |
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156 INCREF(None); |
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157 return None; |
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158 } |
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159 #endif /* USE_MALLOPT */ |
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160 |
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161 static object * |
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162 sys_getrefcount(self, args) |
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163 object *self; |
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164 object *args; |
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165 { |
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166 object *arg; |
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167 if (!getargs(args, "O", &arg)) |
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168 return NULL; |
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169 return newintobject((long) arg->ob_refcnt); |
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170 } |
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171 |
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172 #ifdef COUNT_ALLOCS |
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173 static PyObject * |
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174 sys_getcounts(self, args) |
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175 PyObject *self, *args; |
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176 { |
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177 extern PyObject *get_counts Py_PROTO((void)); |
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178 |
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179 if (!PyArg_Parse(args, "")) |
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180 return NULL; |
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181 return get_counts(); |
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182 } |
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183 #endif |
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184 |
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185 #ifdef Py_TRACE_REFS |
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186 /* Defined in objects.c because it uses static globals if that file */ |
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187 extern PyObject *_Py_GetObjects Py_PROTO((PyObject *, PyObject *)); |
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188 #endif |
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189 |
| 86 | 190 static struct methodlist sys_methods[] = { |
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191 {"exit", sys_exit, 0}, |
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192 {"getrefcount", sys_getrefcount, 0}, |
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193 #ifdef COUNT_ALLOCS |
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194 {"getcounts", sys_getcounts, 0}, |
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195 #endif |
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196 #ifdef Py_TRACE_REFS |
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197 {"getobjects", _Py_GetObjects, 1}, |
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198 #endif |
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199 #ifdef USE_MALLOPT |
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200 {"mdebug", sys_mdebug, 0}, |
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201 #endif |
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202 {"setprofile", sys_setprofile, 0}, |
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203 {"settrace", sys_settrace, 0}, |
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204 {"setcheckinterval", sys_setcheckinterval, 1}, |
| 86 | 205 {NULL, NULL} /* sentinel */ |
| 206 }; | |
| 207 | |
| 6 | 208 static object *sysin, *sysout, *syserr; |
| 209 | |
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210 static object * |
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211 list_builtin_module_names() |
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212 { |
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213 object *list = newlistobject(0); |
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214 int i; |
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215 if (list == NULL) |
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216 return NULL; |
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217 for (i = 0; inittab[i].name != NULL; i++) { |
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218 object *name = newstringobject(inittab[i].name); |
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219 if (name == NULL) |
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220 break; |
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221 addlistitem(list, name); |
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222 DECREF(name); |
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223 } |
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224 if (sortlist(list) != 0) { |
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225 DECREF(list); |
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226 list = NULL; |
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227 } |
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228 return list; |
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229 } |
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230 |
| 6 | 231 void |
| 86 | 232 initsys() |
| 6 | 233 { |
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234 extern long getmaxint PROTO((void)); |
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235 extern char *getversion PROTO((void)); |
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236 extern char *getcopyright PROTO((void)); |
| 2810 | 237 extern char *getplatform PROTO((void)); |
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238 extern char *Py_GetPrefix PROTO((void)); |
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239 extern char *Py_GetExecPrefix PROTO((void)); |
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265
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240 extern int fclose PROTO((FILE *)); |
| 86 | 241 object *m = initmodule("sys", sys_methods); |
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242 object *v; |
| 86 | 243 sysdict = getmoduledict(m); |
| 244 INCREF(sysdict); | |
| 6 | 245 /* NB keep an extra ref to the std files to avoid closing them |
| 246 when the user deletes them */ | |
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247 sysin = newopenfileobject(stdin, "<stdin>", "r", fclose); |
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248 sysout = newopenfileobject(stdout, "<stdout>", "w", fclose); |
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249 syserr = newopenfileobject(stderr, "<stderr>", "w", fclose); |
| 6 | 250 if (err_occurred()) |
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251 fatal("can't initialize sys.std{in,out,err}"); |
| 6 | 252 dictinsert(sysdict, "stdin", sysin); |
| 253 dictinsert(sysdict, "stdout", sysout); | |
| 254 dictinsert(sysdict, "stderr", syserr); | |
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255 dictinsert(sysdict, "version", v = newstringobject(getversion())); |
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256 XDECREF(v); |
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257 dictinsert(sysdict, "copyright", v = newstringobject(getcopyright())); |
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258 XDECREF(v); |
| 2810 | 259 dictinsert(sysdict, "platform", v = newstringobject(getplatform())); |
| 260 XDECREF(v); | |
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261 dictinsert(sysdict, "prefix", v = newstringobject(Py_GetPrefix())); |
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262 XDECREF(v); |
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263 dictinsert(sysdict, "exec_prefix", |
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264 v = newstringobject(Py_GetExecPrefix())); |
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265 XDECREF(v); |
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266 dictinsert(sysdict, "maxint", v = newintobject(getmaxint())); |
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267 XDECREF(v); |
| 86 | 268 dictinsert(sysdict, "modules", get_modules()); |
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269 dictinsert(sysdict, "builtin_module_names", |
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270 v = list_builtin_module_names()); |
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271 XDECREF(v); |
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272 #ifdef MS_COREDLL |
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273 dictinsert(sysdict, "dllhandle", v = newintobject((int)PyWin_DLLhModule)); |
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274 XDECREF(v); |
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275 dictinsert(sysdict, "winver", v = newstringobject(MS_DLL_ID)); |
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276 XDECREF(v); |
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277 #endif |
| 6 | 278 if (err_occurred()) |
| 279 fatal("can't insert sys.* objects in sys dict"); | |
| 86 | 280 } |
| 281 | |
| 282 static object * | |
| 283 makepathobject(path, delim) | |
| 284 char *path; | |
| 285 int delim; | |
| 286 { | |
| 287 int i, n; | |
| 288 char *p; | |
| 289 object *v, *w; | |
| 6 | 290 |
| 86 | 291 n = 1; |
| 292 p = path; | |
| 293 while ((p = strchr(p, delim)) != NULL) { | |
| 294 n++; | |
| 295 p++; | |
| 296 } | |
| 297 v = newlistobject(n); | |
| 298 if (v == NULL) | |
| 299 return NULL; | |
| 300 for (i = 0; ; i++) { | |
| 301 p = strchr(path, delim); | |
| 302 if (p == NULL) | |
| 303 p = strchr(path, '\0'); /* End of string */ | |
| 304 w = newsizedstringobject(path, (int) (p - path)); | |
| 305 if (w == NULL) { | |
| 306 DECREF(v); | |
| 307 return NULL; | |
| 308 } | |
| 309 setlistitem(v, i, w); | |
| 310 if (*p == '\0') | |
| 311 break; | |
| 312 path = p+1; | |
| 313 } | |
| 314 return v; | |
| 315 } | |
| 316 | |
| 317 void | |
| 318 setpythonpath(path) | |
| 319 char *path; | |
| 320 { | |
| 321 object *v; | |
| 322 if ((v = makepathobject(path, DELIM)) == NULL) | |
| 323 fatal("can't create sys.path"); | |
| 324 if (sysset("path", v) != 0) | |
| 325 fatal("can't assign sys.path"); | |
|
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326 DECREF(v); |
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327 } |
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328 |
| 86 | 329 static object * |
| 330 makeargvobject(argc, argv) | |
| 331 int argc; | |
| 332 char **argv; | |
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333 { |
| 86 | 334 object *av; |
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335 if (argc <= 0 || argv == NULL) { |
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336 /* Ensure at least one (empty) argument is seen */ |
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337 static char *empty_argv[1] = {""}; |
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338 argv = empty_argv; |
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339 argc = 1; |
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340 } |
| 86 | 341 av = newlistobject(argc); |
| 342 if (av != NULL) { | |
| 343 int i; | |
| 344 for (i = 0; i < argc; i++) { | |
| 345 object *v = newstringobject(argv[i]); | |
| 346 if (v == NULL) { | |
| 347 DECREF(av); | |
| 348 av = NULL; | |
| 349 break; | |
| 350 } | |
| 351 setlistitem(av, i, v); | |
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352 } |
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353 } |
| 86 | 354 return av; |
| 6 | 355 } |
| 356 | |
| 357 void | |
| 86 | 358 setpythonargv(argc, argv) |
| 359 int argc; | |
| 360 char **argv; | |
| 6 | 361 { |
| 86 | 362 object *av = makeargvobject(argc, argv); |
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363 object *path = sysget("path"); |
| 86 | 364 if (av == NULL) |
| 365 fatal("no mem for sys.argv"); | |
| 366 if (sysset("argv", av) != 0) | |
| 367 fatal("can't assign sys.argv"); | |
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368 if (path != NULL) { |
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369 char *p = NULL; |
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370 int n = 0; |
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371 object *a; |
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372 #if SEP == '\\' /* Special case for MS filename syntax */ |
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373 if (argc > 0 && argv[0] != NULL) { |
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374 char *q; |
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375 p = strrchr(argv[0], SEP); |
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376 /* Test for alternate separator */ |
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377 q = strrchr(p ? p : argv[0], '/'); |
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378 if (q != NULL) |
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379 p = q; |
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380 if (p != NULL) { |
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381 n = p + 1 - argv[0]; |
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382 if (n > 1 && p[-1] != ':') |
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383 n--; /* Drop trailing separator */ |
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384 } |
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385 } |
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386 #else /* All other filename syntaxes */ |
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387 if (argc > 0 && argv[0] != NULL) |
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388 p = strrchr(argv[0], SEP); |
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389 if (p != NULL) { |
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390 n = p + 1 - argv[0]; |
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391 #if SEP == '/' /* Special case for Unix filename syntax */ |
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392 if (n > 1) |
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393 n--; /* Drop trailing separator */ |
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394 #endif /* Unix */ |
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395 } |
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396 #endif /* All others */ |
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397 a = newsizedstringobject(argv[0], n); |
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398 if (a == NULL) |
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399 fatal("no mem for sys.path insertion"); |
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400 if (inslistitem(path, 0, a) < 0) |
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401 fatal("sys.path.insert(0) failed"); |
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402 DECREF(a); |
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403 } |
| 86 | 404 DECREF(av); |
| 6 | 405 } |