cpython/Modules/main.c

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/* Python interpreter main program */
#include "Python.h"
#include "osdefs.h"
#include "code.h" /* For CO_FUTURE_DIVISION */
#include "import.h"
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#ifdef __VMS
#include <unixlib.h>
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#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() */
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static char **orig_argv;
static int orig_argc;
/* command line options */
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#define BASE_OPTS "3bBc:dEhiJm:OQ:sStuUvVW: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 */
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extern int Py_RISCOSWimpFlag;
#endif /*RISCOS*/
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/* Short usage message (with %s for argv0) */
static char *usage_line =
"usage: %s [option] ... [-c cmd | -m mod | file | -] [arg] ...\n";
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/* Long usage message, split into parts < 512 bytes */
Add warning mode for classic division, almost exactly as specified in PEP 238. Changes: - add a new flag variable Py_DivisionWarningFlag, declared in pydebug.h, defined in object.c, set in main.c, and used in {int,long,float,complex}object.c. When this flag is set, the classic division operator issues a DeprecationWarning message. - add a new API PyRun_SimpleStringFlags() to match PyRun_SimpleString(). The main() function calls this so that commands run with -c can also benefit from -Dnew. - While I was at it, I changed the usage message in main() somewhat: alphabetized the options, split it in *four* parts to fit in under 512 bytes (not that I still believe this is necessary -- doc strings elsewhere are much longer), and perhaps most visibly, don't display the full list of options on each command line error. Instead, the full list is only displayed when -h is used, and otherwise a brief reminder of -h is displayed. When -h is used, write to stdout so that you can do `python -h | more'. Notes: - I don't want to use the -W option to control whether the classic division warning is issued or not, because the machinery to decide whether to display the warning or not is very expensive (it involves calling into the warnings.py module). You can use -Werror to turn the warnings into exceptions though. - The -Dnew option doesn't select future division for all of the program -- only for the __main__ module. I don't know if I'll ever change this -- it would require changes to the .pyc file magic number to do it right, and a more global notion of compiler flags. - You can usefully combine -Dwarn and -Dnew: this gives the __main__ module new division, and warns about classic division everywhere else.
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static char *usage_1 = "\
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Options and arguments (and corresponding environment variables):\n\
-B : don't write .py[co] files on import; also PYTHONDONTWRITEBYTECODE=x\n\
Add warning mode for classic division, almost exactly as specified in PEP 238. Changes: - add a new flag variable Py_DivisionWarningFlag, declared in pydebug.h, defined in object.c, set in main.c, and used in {int,long,float,complex}object.c. When this flag is set, the classic division operator issues a DeprecationWarning message. - add a new API PyRun_SimpleStringFlags() to match PyRun_SimpleString(). The main() function calls this so that commands run with -c can also benefit from -Dnew. - While I was at it, I changed the usage message in main() somewhat: alphabetized the options, split it in *four* parts to fit in under 512 bytes (not that I still believe this is necessary -- doc strings elsewhere are much longer), and perhaps most visibly, don't display the full list of options on each command line error. Instead, the full list is only displayed when -h is used, and otherwise a brief reminder of -h is displayed. When -h is used, write to stdout so that you can do `python -h | more'. Notes: - I don't want to use the -W option to control whether the classic division warning is issued or not, because the machinery to decide whether to display the warning or not is very expensive (it involves calling into the warnings.py module). You can use -Werror to turn the warnings into exceptions though. - The -Dnew option doesn't select future division for all of the program -- only for the __main__ module. I don't know if I'll ever change this -- it would require changes to the .pyc file magic number to do it right, and a more global notion of compiler flags. - You can usefully combine -Dwarn and -Dnew: this gives the __main__ module new division, and warns about classic division everywhere else.
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-c cmd : program passed in as string (terminates option list)\n\
-d : debug output from parser; also PYTHONDEBUG=x\n\
-E : ignore PYTHON* 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\
";
static char *usage_2 = "\
if stdin does not appear to be a terminal; also PYTHONINSPECT=x\n\
-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\
-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew\n\
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-s : don't add user site directory to sys.path; also PYTHONNOUSERSITE\n\
-S : don't imply 'import site' on initialization\n\
-t : issue warnings about inconsistent tab usage (-tt: issue errors)\n\
Add warning mode for classic division, almost exactly as specified in PEP 238. Changes: - add a new flag variable Py_DivisionWarningFlag, declared in pydebug.h, defined in object.c, set in main.c, and used in {int,long,float,complex}object.c. When this flag is set, the classic division operator issues a DeprecationWarning message. - add a new API PyRun_SimpleStringFlags() to match PyRun_SimpleString(). The main() function calls this so that commands run with -c can also benefit from -Dnew. - While I was at it, I changed the usage message in main() somewhat: alphabetized the options, split it in *four* parts to fit in under 512 bytes (not that I still believe this is necessary -- doc strings elsewhere are much longer), and perhaps most visibly, don't display the full list of options on each command line error. Instead, the full list is only displayed when -h is used, and otherwise a brief reminder of -h is displayed. When -h is used, write to stdout so that you can do `python -h | more'. Notes: - I don't want to use the -W option to control whether the classic division warning is issued or not, because the machinery to decide whether to display the warning or not is very expensive (it involves calling into the warnings.py module). You can use -Werror to turn the warnings into exceptions though. - The -Dnew option doesn't select future division for all of the program -- only for the __main__ module. I don't know if I'll ever change this -- it would require changes to the .pyc file magic number to do it right, and a more global notion of compiler flags. - You can usefully combine -Dwarn and -Dnew: this gives the __main__ module new division, and warns about classic division everywhere else.
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";
static char *usage_3 = "\
-u : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x\n\
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\
Add warning mode for classic division, almost exactly as specified in PEP 238. Changes: - add a new flag variable Py_DivisionWarningFlag, declared in pydebug.h, defined in object.c, set in main.c, and used in {int,long,float,complex}object.c. When this flag is set, the classic division operator issues a DeprecationWarning message. - add a new API PyRun_SimpleStringFlags() to match PyRun_SimpleString(). The main() function calls this so that commands run with -c can also benefit from -Dnew. - While I was at it, I changed the usage message in main() somewhat: alphabetized the options, split it in *four* parts to fit in under 512 bytes (not that I still believe this is necessary -- doc strings elsewhere are much longer), and perhaps most visibly, don't display the full list of options on each command line error. Instead, the full list is only displayed when -h is used, and otherwise a brief reminder of -h is displayed. When -h is used, write to stdout so that you can do `python -h | more'. Notes: - I don't want to use the -W option to control whether the classic division warning is issued or not, because the machinery to decide whether to display the warning or not is very expensive (it involves calling into the warnings.py module). You can use -Werror to turn the warnings into exceptions though. - The -Dnew option doesn't select future division for all of the program -- only for the __main__ module. I don't know if I'll ever change this -- it would require changes to the .pyc file magic number to do it right, and a more global notion of compiler flags. - You can usefully combine -Dwarn and -Dnew: this gives the __main__ module new division, and warns about classic division everywhere else.
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-x : skip first line of source, allowing use of non-Unix forms of #!cmd\n\
";
static char *usage_4 = "\
Merged revisions 68292,68344,68361,68378,68424,68426,68429-68430,68450,68457,68480-68481,68493,68495,68499,68501,68512,68514-68515 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r68292 | skip.montanaro | 2009-01-04 11:36:58 +0100 (So, 04 Jan 2009) | 3 lines If user configures --without-gcc give preference to $CC instead of blindly assuming the compiler will be "cc". ........ r68344 | marc-andre.lemburg | 2009-01-05 20:43:35 +0100 (Mo, 05 Jan 2009) | 7 lines Fix #4846 (Py_UNICODE_ISSPACE causes linker error) by moving the declaration into the extern "C" section. Add a few more comments and apply some minor edits to make the file contents fit the original structure again. ........ r68361 | antoine.pitrou | 2009-01-06 19:34:08 +0100 (Di, 06 Jan 2009) | 3 lines Use shutil.rmtree rather than os.rmdir. ........ r68378 | mark.dickinson | 2009-01-07 18:48:33 +0100 (Mi, 07 Jan 2009) | 2 lines Issue #4869: clarify documentation for random.expovariate. ........ r68424 | benjamin.peterson | 2009-01-09 03:53:35 +0100 (Fr, 09 Jan 2009) | 1 line specify what -3 warnings are about ........ r68426 | benjamin.peterson | 2009-01-09 04:03:05 +0100 (Fr, 09 Jan 2009) | 1 line fix spelling ........ r68429 | benjamin.peterson | 2009-01-09 04:05:14 +0100 (Fr, 09 Jan 2009) | 1 line add -3 to manpage ........ r68430 | benjamin.peterson | 2009-01-09 04:07:27 +0100 (Fr, 09 Jan 2009) | 1 line be more specific in -3 option help ........ r68450 | jeffrey.yasskin | 2009-01-09 17:47:07 +0100 (Fr, 09 Jan 2009) | 3 lines Fix issue 4884, preventing a crash in the socket code when python is compiled with llvm-gcc and run with a glibc <2.10. ........ r68457 | kristjan.jonsson | 2009-01-09 21:10:59 +0100 (Fr, 09 Jan 2009) | 1 line Issue 3677: Fix import from UNC paths on Windows. ........ r68480 | vinay.sajip | 2009-01-10 14:38:04 +0100 (Sa, 10 Jan 2009) | 1 line Minor documentation changes cross-referencing NullHandler to the documentation on configuring logging in a library. ........ r68481 | vinay.sajip | 2009-01-10 14:42:04 +0100 (Sa, 10 Jan 2009) | 1 line Corrected an incorrect self-reference. ........ r68493 | benjamin.peterson | 2009-01-10 18:18:55 +0100 (Sa, 10 Jan 2009) | 1 line rewrite verbose conditionals ........ r68495 | benjamin.peterson | 2009-01-10 18:36:44 +0100 (Sa, 10 Jan 2009) | 1 line tp_iter only exists with Py_TPFLAGS_HAVE_ITER #4901 ........ r68499 | mark.dickinson | 2009-01-10 20:14:55 +0100 (Sa, 10 Jan 2009) | 2 lines Remove an unnecessary check from test_decimal. ........ r68501 | vinay.sajip | 2009-01-10 20:22:57 +0100 (Sa, 10 Jan 2009) | 1 line Corrected minor typo and added .currentmodule directives to fix missing cross-references. ........ r68512 | benjamin.peterson | 2009-01-10 23:42:10 +0100 (Sa, 10 Jan 2009) | 1 line make tests fail if they can't be imported ........ r68514 | benjamin.peterson | 2009-01-11 00:41:59 +0100 (So, 11 Jan 2009) | 1 line move seealso to a more appropiate place ........ r68515 | benjamin.peterson | 2009-01-11 00:49:08 +0100 (So, 11 Jan 2009) | 1 line macos 9 isn't supported ........
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-3 : warn about Python 3.x incompatibilities that 2to3 cannot trivially fix\n\
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file : program read from script file\n\
- : program read from stdin (default; interactive mode if a tty)\n\
arg ...: arguments passed to program in sys.argv[1:]\n\n\
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Other environment variables:\n\
PYTHONSTARTUP: file executed on interactive startup (no default)\n\
PYTHONPATH : '%c'-separated list of directories prefixed to the\n\
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default module search path. The result is sys.path.\n\
";
static char *usage_5 = "\
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\
PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.\n\
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";
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 {
fputs(usage_1, f);
fputs(usage_2, f);
fputs(usage_3, f);
fprintf(f, usage_4, DELIM);
fprintf(f, usage_5, DELIM, PYTHONHOMEHELP);
}
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#if defined(__VMS)
if (exitcode == 0) {
/* suppress 'error' message */
return 1;
}
else {
/* STS$M_INHIB_MSG + SS$_ABORT */
return 0x1000002c;
}
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#else
return exitcode;
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#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);
} else {
int save_errno;
save_errno = errno;
PySys_WriteStderr("Could not open PYTHONSTARTUP\n");
errno = save_errno;
PyErr_SetFromErrnoWithFilename(PyExc_IOError,
startup);
PyErr_Print();
PyErr_Clear();
}
}
}
static int RunModule(char *module, int set_argv0)
{
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_as_main");
if (runmodule == NULL) {
fprintf(stderr, "Could not access runpy._run_module_as_main\n");
Py_DECREF(runpy);
return -1;
}
runargs = Py_BuildValue("(si)", module, set_argv0);
if (runargs == NULL) {
fprintf(stderr,
"Could not create arguments for runpy._run_module_as_main\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;
}
static int RunMainFromImporter(char *filename)
{
PyObject *argv0 = NULL, *importer = NULL;
if ((argv0 = PyString_FromString(filename)) &&
(importer = PyImport_GetImporter(argv0)) &&
(importer->ob_type != &PyNullImporter_Type))
{
/* argv0 is usable as an import source, so
put it in sys.path[0] and import __main__ */
PyObject *sys_path = NULL;
if ((sys_path = PySys_GetObject("path")) &&
!PyList_SetItem(sys_path, 0, argv0))
{
Py_INCREF(argv0);
Py_DECREF(importer);
sys_path = NULL;
return RunModule("__main__", 0) != 0;
}
}
Py_XDECREF(argv0);
Py_XDECREF(importer);
if (PyErr_Occurred()) {
PyErr_Print();
return 1;
}
return -1;
}
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/* Main program */
int
Py_Main(int argc, char **argv)
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{
int c;
int sts;
char *command = NULL;
char *filename = NULL;
char *module = NULL;
FILE *fp = stdin;
char *p;
int unbuffered = 0;
int skipfirstline = 0;
int stdin_is_interactive = 0;
int help = 0;
int version = 0;
int saw_unbuffered_flag = 0;
PyCompilerFlags cf;
cf.cf_flags = 0;
orig_argc = argc; /* For Py_GetArgcArgv() */
orig_argv = argv;
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#ifdef RISCOS
Py_RISCOSWimpFlag = 0;
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#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 'b':
Py_BytesWarningFlag++;
break;
case 'd':
Py_DebugFlag++;
break;
case '3':
Py_Py3kWarningFlag++;
if (!Py_DivisionWarningFlag)
Py_DivisionWarningFlag = 1;
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':
Py_InspectFlag++;
Py_InteractiveFlag++;
break;
/* case 'J': reserved for Jython */
case 'O':
Py_OptimizeFlag++;
break;
case 'B':
Py_DontWriteBytecodeFlag++;
break;
case 's':
Py_NoUserSiteDirectory++;
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;
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#ifdef RISCOS
case 'w':
Py_RISCOSWimpFlag = 1;
break;
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#endif
case 'x':
skipfirstline = 1;
break;
/* case 'X': reserved for implementation-specific arguments */
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 (!Py_InspectFlag &&
(p = Py_GETENV("PYTHONINSPECT")) && *p != '\0')
Py_InspectFlag = 1;
if (!saw_unbuffered_flag &&
(p = Py_GETENV("PYTHONUNBUFFERED")) && *p != '\0')
unbuffered = 1;
if (!Py_NoUserSiteDirectory &&
(p = Py_GETENV("PYTHONNOUSERSITE")) && *p != '\0')
Py_NoUserSiteDirectory = 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
}
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. */
}
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#ifdef __VMS
else {
setvbuf (stdout, (char *)NULL, _IOLBF, BUFSIZ);
}
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#endif /* __VMS */
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#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 ((Py_InspectFlag || (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, 1);
free(module);
}
else {
if (filename == NULL && stdin_is_interactive) {
Py_InspectFlag = 0; /* do exit on SystemExit */
RunStartupFile(&cf);
}
/* XXX */
sts = -1; /* keep track of whether we've already run __main__ */
if (filename != NULL) {
sts = RunMainFromImporter(filename);
}
if (sts==-1 && filename!=NULL) {
if ((fp = fopen(filename, "r")) == NULL) {
fprintf(stderr, "%s: can't open file '%s': [Errno %d] %s\n",
argv[0], filename, errno, strerror(errno));
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);
fclose(fp);
return 1;
}
}
}
if (sts==-1) {
/* call pending calls like signal handlers (SIGINT) */
if (Py_MakePendingCalls() == -1) {
PyErr_Print();
sts = 1;
} else {
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 (!Py_InspectFlag &&
(p = Py_GETENV("PYTHONINSPECT")) && *p != '\0')
{
Py_InspectFlag = 1;
}
if (Py_InspectFlag && stdin_is_interactive &&
(filename != NULL || command != NULL || module != NULL)) {
Py_InspectFlag = 0;
/* XXX */
sts = PyRun_AnyFileFlags(stdin, "<stdin>", &cf) != 0;
}
Py_Finalize();
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#ifdef RISCOS
if (Py_RISCOSWimpFlag)
fprintf(stderr, "\x0cq\x0c"); /* make frontend quit */
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#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;
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}
/* 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 */
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/* 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)
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{
*argc = orig_argc;
*argv = orig_argv;
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}
#ifdef __cplusplus
}
#endif