/* Python interpreter main program */ #include "Python.h"#include "osdefs.h"#include "code.h" /* For CO_FUTURE_DIVISION */#include "import.h" #ifdef __VMS#include <unixlib.h>#endif #if defined(MS_WINDOWS) || defined(__CYGWIN__)#ifdef HAVE_FCNTL_H#include <fcntl.h>#endif#endif #if (defined(PYOS_OS2) && !defined(PYCC_GCC)) || defined(MS_WINDOWS)#define PYTHONHOMEHELP "<prefix>\\lib"#else#if defined(PYOS_OS2) && defined(PYCC_GCC)#define PYTHONHOMEHELP "<prefix>/Lib"#else#define PYTHONHOMEHELP "<prefix>/pythonX.X"#endif#endif #include "pygetopt.h" #define COPYRIGHT \    "Type \"help\", \"copyright\", \"credits\" or \"license\" " \    "for more information." #ifdef __cplusplusextern "C" {#endif /* For Py_GetArgcArgv(); set by main() */static char **orig_argv;static int  orig_argc; /* command line options */#define BASE_OPTS "c:dEhim:OQ:StuUvVW:xX?" #ifndef RISCOS#define PROGRAM_OPTS BASE_OPTS#else /*RISCOS*//* extra option saying that we are running under a special task window   frontend; especially my_readline will behave different */#define PROGRAM_OPTS BASE_OPTS "w"/* corresponding flag */extern int Py_RISCOSWimpFlag;#endif /*RISCOS*/ /* Short usage message (with %s for argv0) */static char *usage_line ="usage: %s [option] ... [-c cmd | -m mod | file | -] [arg] ...\n"; /* Long usage message, split into parts < 512 bytes */static char *usage_1 = "\Options and arguments (and corresponding environment variables):\n\-c cmd : program passed in as string (terminates option list)\n\-d     : debug output from parser (also PYTHONDEBUG=x)\n\-E     : ignore environment variables (such as PYTHONPATH)\n\-h     : print this help message and exit (also --help)\n\-i     : inspect interactively after running script, (also PYTHONINSPECT=x)\n\         and force prompts, even if stdin does not appear to be a terminal\n\";static char *usage_2 = "\-m mod : run library module as a script (terminates option list)\n\-O     : optimize generated bytecode (a tad; also PYTHONOPTIMIZE=x)\n\-OO    : remove doc-strings in addition to the -O optimizations\n\-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew\n\-S     : don't imply 'import site' on initialization\n\-t     : issue warnings about inconsistent tab usage (-tt: issue errors)\n\-u     : unbuffered binary stdout and stderr (also PYTHONUNBUFFERED=x)\n\";static char *usage_3 = "\         see man page for details on internal buffering relating to '-u'\n\-v     : verbose (trace import statements) (also PYTHONVERBOSE=x)\n\-V     : print the Python version number and exit (also --version)\n\-W arg : warning control (arg is action:message:category:module:lineno)\n\-x     : skip first line of source, allowing use of non-Unix forms of #!cmd\n\file   : program read from script file\n\-      : program read from stdin (default; interactive mode if a tty)\n\";static char *usage_4 = "\arg ...: arguments passed to program in sys.argv[1:]\n\Other environment variables:\n\PYTHONSTARTUP: file executed on interactive startup (no default)\n\PYTHONPATH   : '%c'-separated list of directories prefixed to the\n\               default module search path.  The result is sys.path.\n\PYTHONHOME   : alternate <prefix> directory (or <prefix>%c<exec_prefix>).\n\               The default module search path uses %s.\n\PYTHONCASEOK : ignore case in 'import' statements (Windows).\n\";  static intusage(int exitcode, char* program){	FILE *f = exitcode ? stderr : stdout; 	fprintf(f, usage_line, program);	if (exitcode)		fprintf(f, "Try `python -h' for more information.\n");	else {		fprintf(f, usage_1);		fprintf(f, usage_2);		fprintf(f, usage_3);		fprintf(f, usage_4, DELIM, DELIM, PYTHONHOMEHELP);	}#if defined(__VMS)	if (exitcode == 0) {		/* suppress 'error' message */		return 1;	}	else {		/* STS$M_INHIB_MSG + SS$_ABORT */		return 0x1000002c;	}#else	return exitcode;#endif	/*NOTREACHED*/} static void RunStartupFile(PyCompilerFlags *cf){	char *startup = Py_GETENV("PYTHONSTARTUP");	if (startup != NULL && startup[0] != '\0') {		FILE *fp = fopen(startup, "r");		if (fp != NULL) {			(void) PyRun_SimpleFileExFlags(fp, startup, 0, cf);			PyErr_Clear();			fclose(fp);		}	}}  static int RunModule(char *module){	PyObject *runpy, *runmodule, *runargs, *result;	runpy = PyImport_ImportModule("runpy");	if (runpy == NULL) {		fprintf(stderr, "Could not import runpy module\n");		return -1;	}	runmodule = PyObject_GetAttrString(runpy, "run_module");	if (runmodule == NULL) {		fprintf(stderr, "Could not access runpy.run_module\n");		Py_DECREF(runpy);		return -1;	}	runargs = Py_BuildValue("sOsO", module,							Py_None, "__main__", Py_True);	if (runargs == NULL) {		fprintf(stderr,				"Could not create arguments for runpy.run_module\n");		Py_DECREF(runpy);		Py_DECREF(runmodule);		return -1;	}	result = PyObject_Call(runmodule, runargs, NULL);	if (result == NULL) {		PyErr_Print();	}	Py_DECREF(runpy);	Py_DECREF(runmodule);	Py_DECREF(runargs);	if (result == NULL) {		return -1;	}	Py_DECREF(result);	return 0;} /* Wait until threading._shutdown completes, provided   the threading module was imported in the first place.   The shutdown routine will wait until all non-daemon   "threading" threads have completed. */#include "abstract.h"static voidWaitForThreadShutdown(){#ifdef WITH_THREAD	PyObject *result;	PyThreadState *tstate = PyThreadState_GET();	PyObject *threading = PyMapping_GetItemString(tstate->interp->modules,						      "threading");	if (threading == NULL) {		/* threading not imported */		PyErr_Clear();		return;	}	result = PyObject_CallMethod(threading, "_shutdown", "");	if (result == NULL)		PyErr_WriteUnraisable(threading);	else		Py_DECREF(result);	Py_DECREF(threading);#endif} /* Main program */ intPy_Main(int argc, char **argv){	int c;	int sts;	char *command = NULL;	char *filename = NULL;	char *module = NULL;	FILE *fp = stdin;	char *p;	int inspect = 0;	int unbuffered = 0;	int skipfirstline = 0;	int stdin_is_interactive = 0;	int help = 0;	int version = 0;	int saw_inspect_flag = 0;	int saw_unbuffered_flag = 0;	PyCompilerFlags cf; 	cf.cf_flags = 0; 	orig_argc = argc;	/* For Py_GetArgcArgv() */	orig_argv = argv; #ifdef RISCOS	Py_RISCOSWimpFlag = 0;#endif 	PySys_ResetWarnOptions(); 	while ((c = _PyOS_GetOpt(argc, argv, PROGRAM_OPTS)) != EOF) {		if (c == 'c') {			/* -c is the last option; following arguments			   that look like options are left for the			   command to interpret. */			command = (char *)malloc(strlen(_PyOS_optarg) + 2);			if (command == NULL)				Py_FatalError(				   "not enough memory to copy -c argument");			strcpy(command, _PyOS_optarg);			strcat(command, "\n");			break;		} 		if (c == 'm') {			/* -m is the last option; following arguments			   that look like options are left for the			   module to interpret. */			module = (char *)malloc(strlen(_PyOS_optarg) + 2);			if (module == NULL)				Py_FatalError(				   "not enough memory to copy -m argument");			strcpy(module, _PyOS_optarg);			break;		} 		switch (c) { 		case 'd':			Py_DebugFlag++;			break; 		case 'Q':			if (strcmp(_PyOS_optarg, "old") == 0) {				Py_DivisionWarningFlag = 0;				break;			}			if (strcmp(_PyOS_optarg, "warn") == 0) {				Py_DivisionWarningFlag = 1;				break;			}			if (strcmp(_PyOS_optarg, "warnall") == 0) {				Py_DivisionWarningFlag = 2;				break;			}			if (strcmp(_PyOS_optarg, "new") == 0) {				/* This only affects __main__ */				cf.cf_flags |= CO_FUTURE_DIVISION;				/* And this tells the eval loop to treat				   BINARY_DIVIDE as BINARY_TRUE_DIVIDE */				_Py_QnewFlag = 1;				break;			}			fprintf(stderr,				"-Q option should be `-Qold', "				"`-Qwarn', `-Qwarnall', or `-Qnew' only\n");			return usage(2, argv[0]);			/* NOTREACHED */ 		case 'i':			inspect++;			saw_inspect_flag = 1;			Py_InteractiveFlag++;			break; 		case 'O':			Py_OptimizeFlag++;			break; 		case 'S':			Py_NoSiteFlag++;			break; 		case 'E':			Py_IgnoreEnvironmentFlag++;			break; 		case 't':			Py_TabcheckFlag++;			break; 		case 'u':			unbuffered++;			saw_unbuffered_flag = 1;			break; 		case 'v':			Py_VerboseFlag++;			break; #ifdef RISCOS		case 'w':			Py_RISCOSWimpFlag = 1;			break;#endif 		case 'x':			skipfirstline = 1;			break; 		case 'U':			Py_UnicodeFlag++;			break;		case 'h':		case '?':			help++;			break;		case 'V':			version++;			break; 		case 'W':			PySys_AddWarnOption(_PyOS_optarg);			break; 		/* This space reserved for other options */ 		default:			return usage(2, argv[0]);			/*NOTREACHED*/ 		}	} 	if (help)		return usage(0, argv[0]); 	if (version) {		fprintf(stderr, "Python %s\n", PY_VERSION);		return 0;	} 	if (!saw_inspect_flag &&	    (p = Py_GETENV("PYTHONINSPECT")) && *p != '\0')		inspect = 1;	if (!saw_unbuffered_flag &&	    (p = Py_GETENV("PYTHONUNBUFFERED")) && *p != '\0')		unbuffered = 1; 	if (command == NULL && module == NULL && _PyOS_optind < argc &&	    strcmp(argv[_PyOS_optind], "-") != 0)	{#ifdef __VMS		filename = decc$translate_vms(argv[_PyOS_optind]);		if (filename == (char *)0 || filename == (char *)-1)			filename = argv[_PyOS_optind]; #else		filename = argv[_PyOS_optind];#endif		if (filename != NULL) {			if ((fp = fopen(filename, "r")) == NULL) {#ifdef HAVE_STRERROR				fprintf(stderr, "%s: can't open file '%s': [Errno %d] %s\n",					argv[0], filename, errno, strerror(errno));#else				fprintf(stderr, "%s: can't open file '%s': Errno %d\n",					argv[0], filename, errno);#endif				return 2;			}			else if (skipfirstline) {				int ch;				/* Push back first newline so line numbers				   remain the same */				while ((ch = getc(fp)) != EOF) {					if (ch == '\n') {						(void)ungetc(ch, fp);						break;					}				}			}			{				/* XXX: does this work on Win/Win64? (see posix_fstat) */				struct stat sb;				if (fstat(fileno(fp), &sb) == 0 &&				    S_ISDIR(sb.st_mode)) {					fprintf(stderr, "%s: '%s' is a directory, cannot continue\n", argv[0], filename);					return 1;				}			}		}	} 	stdin_is_interactive = Py_FdIsInteractive(stdin, (char *)0); 	if (unbuffered) {#if defined(MS_WINDOWS) || defined(__CYGWIN__)		_setmode(fileno(stdin), O_BINARY);		_setmode(fileno(stdout), O_BINARY);#endif#ifdef HAVE_SETVBUF		setvbuf(stdin,  (char *)NULL, _IONBF, BUFSIZ);		setvbuf(stdout, (char *)NULL, _IONBF, BUFSIZ);		setvbuf(stderr, (char *)NULL, _IONBF, BUFSIZ);#else /* !HAVE_SETVBUF */		setbuf(stdin,  (char *)NULL);		setbuf(stdout, (char *)NULL);		setbuf(stderr, (char *)NULL);#endif /* !HAVE_SETVBUF */	}	else if (Py_InteractiveFlag) {#ifdef MS_WINDOWS		/* Doesn't have to have line-buffered -- use unbuffered */		/* Any set[v]buf(stdin, ...) screws up Tkinter :-( */		setvbuf(stdout, (char *)NULL, _IONBF, BUFSIZ);#else /* !MS_WINDOWS */#ifdef HAVE_SETVBUF		setvbuf(stdin,  (char *)NULL, _IOLBF, BUFSIZ);		setvbuf(stdout, (char *)NULL, _IOLBF, BUFSIZ);#endif /* HAVE_SETVBUF */#endif /* !MS_WINDOWS */		/* Leave stderr alone - it should be unbuffered anyway. */  	}#ifdef __VMS	else {		setvbuf (stdout, (char *)NULL, _IOLBF, BUFSIZ);	}#endif /* __VMS */ #ifdef __APPLE__	/* On MacOS X, when the Python interpreter is embedded in an	   application bundle, it gets executed by a bootstrapping script	   that does os.execve() with an argv[0] that's different from the	   actual Python executable. This is needed to keep the Finder happy,	   or rather, to work around Apple's overly strict requirements of	   the process name. However, we still need a usable sys.executable,	   so the actual executable path is passed in an environment variable.	   See Lib/plat-mac/bundlebuiler.py for details about the bootstrap	   script. */	if ((p = Py_GETENV("PYTHONEXECUTABLE")) && *p != '\0')		Py_SetProgramName(p);	else		Py_SetProgramName(argv[0]);#else	Py_SetProgramName(argv[0]);#endif	Py_Initialize(); 	if (Py_VerboseFlag ||	    (command == NULL && filename == NULL && module == NULL && stdin_is_interactive)) {		fprintf(stderr, "Python %s on %s\n",			Py_GetVersion(), Py_GetPlatform()); 		if (!Py_NoSiteFlag) 			fprintf(stderr, "%s\n", COPYRIGHT);	} 	if (command != NULL) {		/* Backup _PyOS_optind and force sys.argv[0] = '-c' */		_PyOS_optind--;		argv[_PyOS_optind] = "-c";	} 	if (module != NULL) {		/* Backup _PyOS_optind and force sys.argv[0] = '-c'		   so that PySys_SetArgv correctly sets sys.path[0] to ''*/		_PyOS_optind--;		argv[_PyOS_optind] = "-c";	} 	PySys_SetArgv(argc-_PyOS_optind, argv+_PyOS_optind); 

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