/* Python interpreter main program */

#include "Python.h"

#include "osdefs.h"

#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 __cplusplus

extern "C" {

#endif

/* For Py_GetArgcArgv(); set by main() */

static char **orig_argv;

static int orig_argc;

/* command line options */

#define BASE_OPTS "c:dEhim:OStuvVW: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; forces a prompt even\n\

if stdin does not appear to be a terminal; also PYTHONINSPECT=x\n\

";

static char *usage_2 = "\

-m mod : run library module as a script (terminates option list)\n\

-O : optimize generated bytecode slightly; also PYTHONOPTIMIZE=x\n\

-OO : remove doc-strings in addition to the -O optimizations\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\

can be supplied multiple times to increase verbosity\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\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 int

usage(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 void

WaitForThreadShutdown(void)

{

#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 */

int

Py_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 '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 '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);

if ((inspect || (command == NULL && filename == NULL && module == NULL)) &&

isatty(fileno(stdin))) {

PyObject *v;

v = PyImport_ImportModule("readline");

if (v == NULL)

PyErr_Clear();

else

Py_DECREF(v);

}

if (command) {

sts = PyRun_SimpleStringFlags(command, &cf) != 0;

free(command);

} else if (module) {

sts = RunModule(module);

free(module);

}

else {

if (filename == NULL && stdin_is_interactive) {

RunStartupFile(&cf);

}

/* XXX */

sts = PyRun_AnyFileExFlags(

fp,

filename == NULL ? "<stdin>" : filename,

filename != NULL, &cf) != 0;

}

/* Check this environment variable at the end, to give programs the

* opportunity to set it from Python.

*/

if (!saw_inspect_flag &&

(p = Py_GETENV("PYTHONINSPECT")) && *p != '\0')

{

inspect = 1;

}

if (inspect && stdin_is_interactive &&

(filename != NULL || command != NULL || module != NULL))

/* XXX */

sts = PyRun_AnyFileFlags(stdin, "<stdin>", &cf) != 0;

WaitForThreadShutdown();

Py_Finalize();

#ifdef RISCOS

if (Py_RISCOSWimpFlag)

fprintf(stderr, "\x0cq\x0c"); /* make frontend quit */

#endif

#ifdef __INSURE__

/* Insure++ is a memory analysis tool that aids in discovering

* memory leaks and other memory problems. On Python exit, the

* interned string dictionary is flagged as being in use at exit

* (which it is). Under normal circumstances, this is fine because

* the memory will be automatically reclaimed by the system. Under

* memory debugging, it's a huge source of useless noise, so we

* trade off slower shutdown for less distraction in the memory

* reports. -baw

*/

_Py_ReleaseInternedStrings();

#endif /* __INSURE__ */

return sts;

}

/* this is gonna seem *real weird*, but if you put some other code between

Py_Main() and Py_GetArgcArgv() you will need to adjust the test in the

while statement in Misc/gdbinit:ppystack */

/* Make the *original* argc/argv available to other modules.

This is rare, but it is needed by the secureware extension. */

void

Py_GetArgcArgv(int *argc, char ***argv)

{

*argc = orig_argc;

*argv = orig_argv;

}

#ifdef __cplusplus

}

#endif