Mercurial > cpython-lru_cache-weakref
annotate Python/sysmodule.c @ 710:bc5c77fa8006 legacy-trunk
Added settrace() and setprofile().
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Mon, 23 Mar 1992 18:20:18 +0000 |
| parents | f5a2bc39e10e |
| children | ba4ec13c0f9f |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
| 2 Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The | |
| 3 Netherlands. | |
| 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: |
| 31 - exit(sts): call (C, POSIX) exit(sts) | |
| 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; |
| 6 | 48 |
| 49 static object *sysdict; | |
| 50 | |
| 51 object * | |
| 52 sysget(name) | |
| 53 char *name; | |
| 54 { | |
| 55 return dictlookup(sysdict, name); | |
| 56 } | |
| 57 | |
| 58 FILE * | |
| 59 sysgetfile(name, def) | |
| 60 char *name; | |
| 61 FILE *def; | |
| 62 { | |
| 63 FILE *fp = NULL; | |
| 64 object *v = sysget(name); | |
| 65 if (v != NULL) | |
| 66 fp = getfilefile(v); | |
| 67 if (fp == NULL) | |
| 68 fp = def; | |
| 69 return fp; | |
| 70 } | |
| 71 | |
| 72 int | |
| 73 sysset(name, v) | |
| 74 char *name; | |
| 75 object *v; | |
| 76 { | |
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77 if (v == NULL) { |
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78 if (dictlookup(sysdict, name) == NULL) |
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79 return 0; |
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80 else |
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81 return dictremove(sysdict, name); |
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82 } |
| 6 | 83 else |
| 84 return dictinsert(sysdict, name, v); | |
| 85 } | |
| 86 | |
| 87 static object * | |
| 88 sys_exit(self, args) | |
| 89 object *self; | |
| 90 object *args; | |
| 91 { | |
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92 /* Raise SystemExit so callers may catch it or clean up. */ |
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93 err_setval(SystemExit, args); |
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94 return NULL; |
| 6 | 95 } |
| 96 | |
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97 static object * |
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98 sys_settrace(self, args) |
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99 object *self; |
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100 object *args; |
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101 { |
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102 if (args == None) |
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103 args = NULL; |
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104 XINCREF(args); |
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105 sys_trace = args; |
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106 INCREF(None); |
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107 return None; |
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108 } |
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109 |
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110 static object * |
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111 sys_setprofile(self, args) |
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112 object *self; |
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113 object *args; |
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114 { |
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115 if (args == None) |
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116 args = NULL; |
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117 XINCREF(args); |
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118 sys_profile = args; |
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119 INCREF(None); |
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120 return None; |
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121 } |
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122 |
| 86 | 123 static struct methodlist sys_methods[] = { |
| 124 {"exit", sys_exit}, | |
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125 {"setprofile", sys_setprofile}, |
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126 {"settrace", sys_settrace}, |
| 86 | 127 {NULL, NULL} /* sentinel */ |
| 128 }; | |
| 129 | |
| 6 | 130 static object *sysin, *sysout, *syserr; |
| 131 | |
| 132 void | |
| 86 | 133 initsys() |
| 6 | 134 { |
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135 extern int fclose PROTO((FILE *)); |
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136 extern char version[]; |
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137 object *v = newstringobject(version); |
| 86 | 138 object *m = initmodule("sys", sys_methods); |
| 139 sysdict = getmoduledict(m); | |
| 140 INCREF(sysdict); | |
| 6 | 141 /* NB keep an extra ref to the std files to avoid closing them |
| 142 when the user deletes them */ | |
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265
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143 sysin = newopenfileobject(stdin, "<stdin>", "r", fclose); |
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144 sysout = newopenfileobject(stdout, "<stdout>", "w", fclose); |
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145 syserr = newopenfileobject(stderr, "<stderr>", "w", fclose); |
| 6 | 146 if (err_occurred()) |
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147 fatal("can't create sys.* objects"); |
| 6 | 148 dictinsert(sysdict, "stdin", sysin); |
| 149 dictinsert(sysdict, "stdout", sysout); | |
| 150 dictinsert(sysdict, "stderr", syserr); | |
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151 dictinsert(sysdict, "version", v); |
| 86 | 152 dictinsert(sysdict, "modules", get_modules()); |
| 6 | 153 if (err_occurred()) |
| 154 fatal("can't insert sys.* objects in sys dict"); | |
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155 DECREF(v); |
| 86 | 156 } |
| 157 | |
| 158 static object * | |
| 159 makepathobject(path, delim) | |
| 160 char *path; | |
| 161 int delim; | |
| 162 { | |
| 163 int i, n; | |
| 164 char *p; | |
| 165 object *v, *w; | |
| 6 | 166 |
| 86 | 167 n = 1; |
| 168 p = path; | |
| 169 while ((p = strchr(p, delim)) != NULL) { | |
| 170 n++; | |
| 171 p++; | |
| 172 } | |
| 173 v = newlistobject(n); | |
| 174 if (v == NULL) | |
| 175 return NULL; | |
| 176 for (i = 0; ; i++) { | |
| 177 p = strchr(path, delim); | |
| 178 if (p == NULL) | |
| 179 p = strchr(path, '\0'); /* End of string */ | |
| 180 w = newsizedstringobject(path, (int) (p - path)); | |
| 181 if (w == NULL) { | |
| 182 DECREF(v); | |
| 183 return NULL; | |
| 184 } | |
| 185 setlistitem(v, i, w); | |
| 186 if (*p == '\0') | |
| 187 break; | |
| 188 path = p+1; | |
| 189 } | |
| 190 return v; | |
| 191 } | |
| 192 | |
| 193 void | |
| 194 setpythonpath(path) | |
| 195 char *path; | |
| 196 { | |
| 197 object *v; | |
| 198 if ((v = makepathobject(path, DELIM)) == NULL) | |
| 199 fatal("can't create sys.path"); | |
| 200 if (sysset("path", v) != 0) | |
| 201 fatal("can't assign sys.path"); | |
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202 DECREF(v); |
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203 } |
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204 |
| 86 | 205 static object * |
| 206 makeargvobject(argc, argv) | |
| 207 int argc; | |
| 208 char **argv; | |
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209 { |
| 86 | 210 object *av; |
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211 if (argc <= 0 || argv == NULL) { |
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212 /* Ensure at least one (empty) argument is seen */ |
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213 static char *empty_argv[1] = {""}; |
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214 argv = empty_argv; |
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215 argc = 1; |
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216 } |
| 86 | 217 av = newlistobject(argc); |
| 218 if (av != NULL) { | |
| 219 int i; | |
| 220 for (i = 0; i < argc; i++) { | |
| 221 object *v = newstringobject(argv[i]); | |
| 222 if (v == NULL) { | |
| 223 DECREF(av); | |
| 224 av = NULL; | |
| 225 break; | |
| 226 } | |
| 227 setlistitem(av, i, v); | |
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228 } |
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229 } |
| 86 | 230 return av; |
| 6 | 231 } |
| 232 | |
| 233 void | |
| 86 | 234 setpythonargv(argc, argv) |
| 235 int argc; | |
| 236 char **argv; | |
| 6 | 237 { |
| 86 | 238 object *av = makeargvobject(argc, argv); |
| 239 if (av == NULL) | |
| 240 fatal("no mem for sys.argv"); | |
| 241 if (sysset("argv", av) != 0) | |
| 242 fatal("can't assign sys.argv"); | |
| 243 DECREF(av); | |
| 6 | 244 } |