Mercurial > cpython-lru_cache-weakref

annotate Python/pythonmain.c @ 9293:0a67db47e1d0 legacy-trunk

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Changes to support other object types besides strings as the code string of code objects, as long as they support the (readonly) buffer interface. By Greg Stein.
author Guido van Rossum <guido@python.org>
date Wed, 07 Oct 1998 19:42:25 +0000
parents 85140b354890
children
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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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,
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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
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
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25 /* Python interpreter main program */
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26
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27 #include "allobjects.h"
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28
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29 extern int debugging; /* Needed in parser.c, declared in pythonrun.c */
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30 extern int verbose; /* Needed in import.c, declared in pythonrun.c */
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31 extern int suppress_print; /* Needed in ceval.c, declared in pythonrun.c */
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32
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33 /* Interface to getopt(): */
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34 extern int optind;
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35 extern char *optarg;
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36 extern int getopt(); /* PROTO((int, char **, char *)); -- not standardized */
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37
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38 extern char *getenv();
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39
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40 extern char *getversion();
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41 extern char *getcopyright();
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42
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43 int
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44 realmain(argc, argv)
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45 int argc;
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46 char **argv;
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47 {
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48 int c;
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49 int sts;
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50 char *command = NULL;
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51 char *filename = NULL;
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52 FILE *fp = stdin;
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53 char *p;
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54 int inspect = 0;
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55 int unbuffered = 0;
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56
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57 if ((p = getenv("PYTHONDEBUG")) && *p != '\0')
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58 debugging = 1;
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59 if ((p = getenv("PYTHONSUPPRESS")) && *p != '\0')
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60 suppress_print = 1;
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61 if ((p = getenv("PYTHONVERBOSE")) && *p != '\0')
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62 verbose = 1;
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63 if ((p = getenv("PYTHONINSPECT")) && *p != '\0')
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64 inspect = 1;
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65 if ((p = getenv("PYTHONUNBUFFERED")) && *p != '\0')
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66 unbuffered = 1;
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67
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68 #ifdef macintosh
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69 PyMac_InteractiveOptions(&inspect, &verbose, &suppress_print, &unbuffered, &debugging);
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70 #endif
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71
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72 while ((c = getopt(argc, argv, "c:disuv")) != EOF) {
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73 if (c == 'c') {
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74 /* -c is the last option; following arguments
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75 that look like options are left for the
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76 the command to interpret. */
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77 command = malloc(strlen(optarg) + 2);
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78 if (command == NULL)
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79 fatal("not enough memory to copy -c argument");
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80 strcpy(command, optarg);
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81 strcat(command, "\n");
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82 break;
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83 }
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84
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85 switch (c) {
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86
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87 case 'd':
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88 debugging++;
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89 break;
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90
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91 case 'i':
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92 inspect++;
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93 break;
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94
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95 case 's':
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96 suppress_print++;
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97 break;
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98
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99 case 'u':
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100 unbuffered++;
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101 break;
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102
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103 case 'v':
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104 verbose++;
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105 break;
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106
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107 /* This space reserved for other options */
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108
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109 default:
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110 fprintf(stderr,
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111 "usage: %s [-d] [-i] [-s] [-u ] [-v] [-c cmd | file | -] [arg] ...\n",
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112 argv[0]);
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113 #if !(defined(__CFM68K__) && defined(__MWERKS__))
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114 /* Mwerks cfm68k linker doesn't like these... */
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115 fprintf(stderr, "\
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116 \n\
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117 Options and arguments (and corresponding environment variables):\n\
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118 -d : debug output from parser (also PYTHONDEBUG=x)\n\
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119 -i : inspect interactively after running script (also PYTHONINSPECT=x)\n\
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120 -s : suppress the printing of top level expressions (also PYTHONSUPPRESS=x)\n\
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121 -u : unbuffered stdout and stderr (also PYTHONUNBUFFERED=x)\n\
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122 -v : verbose (trace import statements) (also PYTHONVERBOSE=x)\n\
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123 -c cmd : program passed in as string (terminates option list)\n\
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124 ");
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125 /* ANSI does not allow strings > 512 chars
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126 and MPW doesn't like it either -- so split it! */
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127 fprintf(stderr, "\
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128 file : program read from script file\n\
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129 - : program read from stdin (default; interactive mode if a tty)\n\
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130 arg ...: arguments passed to program in sys.argv[1:]\n\
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131 \n\
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132 Other environment variables:\n\
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133 PYTHONSTARTUP: file executed on interactive startup (no default)\n\
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134 PYTHONPATH : colon-separated list of directories prefixed to the\n\
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135 default module search path. The result is sys.path.\n\
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136 ");
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137 #endif /* !cfm68k || !mwerks */
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138 exit(2);
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139 /*NOTREACHED*/
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140
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141 }
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142 }
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143
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144 if (unbuffered) {
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145 #ifndef MPW
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146 setbuf(stdout, (char *)NULL);
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147 setbuf(stderr, (char *)NULL);
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148 #else
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149 /* On MPW (3.2) unbuffered seems to hang */
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150 setvbuf(stdout, (char *)NULL, _IOLBF, BUFSIZ);
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151 setvbuf(stderr, (char *)NULL, _IOLBF, BUFSIZ);
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152 #endif
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153 }
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154
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155 if (command == NULL && optind < argc && strcmp(argv[optind], "-") != 0)
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156 filename = argv[optind];
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157
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158 if (verbose ||
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159 command == NULL && filename == NULL && isatty((int)fileno(fp)))
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160 fprintf(stderr, "Python %s\n%s\n",
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161 getversion(), getcopyright());
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162
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163 if (filename != NULL) {
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164 if ((fp = fopen(filename, "r")) == NULL) {
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165 fprintf(stderr, "%s: can't open file '%s'\n",
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166 argv[0], filename);
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167 exit(2);
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168 }
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169 }
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170
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171 initall();
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172
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173 if (command != NULL) {
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174 /* Backup optind and force sys.argv[0] = '-c' */
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175 optind--;
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176 argv[optind] = "-c";
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177 }
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178
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179 setpythonargv(argc-optind, argv+optind);
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180
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181 if (command) {
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182 sts = run_command(command) != 0;
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183 }
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184 else {
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185 if (filename == NULL && isatty((int)fileno(fp))) {
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186 char *startup = getenv("PYTHONSTARTUP");
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187 #ifdef macintosh
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188 if (startup == NULL)
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189 startup = "PythonStartup";
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190 #endif
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191 if (startup != NULL && startup[0] != '\0') {
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192 FILE *fp = fopen(startup, "r");
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193 if (fp != NULL) {
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194 (void) run_script(fp, startup);
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195 err_clear();
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196 fclose(fp);
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197 }
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198 }
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199 }
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200 sts = run(fp, filename == NULL ? "<stdin>" : filename) != 0;
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201 if (filename != NULL)
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202 fclose(fp);
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203 }
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204
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205 if (inspect && isatty((int)fileno(stdin)) &&
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206 (filename != NULL || command != NULL))
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207 sts = run(stdin, "<stdin>") != 0;
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208
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209 goaway(sts);
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210 /*NOTREACHED*/
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211 }