mirror of
https://github.com/python/cpython.git
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f7e5b56c37
* Don't use "Python runtime" anymore to parse command line options or to get environment variables: pymain_init() is now a strict separation. * Use an error message rather than "crashing" directly with Py_FatalError(). Limit the number of calls to Py_FatalError(). It prepares the code to handle errors more nicely later. * Warnings options (-W, PYTHONWARNINGS) and "XOptions" (-X) are now only added to the sys module once Python core is properly initialized. * _PyMain is now the well identified owner of some important strings like: warnings options, XOptions, and the "program name". The program name string is now properly freed at exit. pymain_free() is now responsible to free the "command" string. * Rename most methods in Modules/main.c to use a "pymain_" prefix to avoid conflits and ease debug. * Replace _Py_CommandLineDetails_INIT with memset(0) * Reorder a lot of code to fix the initialization ordering. For example, initializing standard streams now comes before parsing PYTHONWARNINGS. * Py_Main() now handles errors when adding warnings options and XOptions. * Add _PyMem_GetDefaultRawAllocator() private function. * Cleanup _PyMem_Initialize(): remove useless global constants: move them into _PyMem_Initialize(). * Call _PyRuntime_Initialize() as soon as possible: _PyRuntime_Initialize() now returns an error message on failure. * Add _PyInitError structure and following macros: * _Py_INIT_OK() * _Py_INIT_ERR(msg) * _Py_INIT_USER_ERR(msg): "user" error, don't abort() in that case * _Py_INIT_FAILED(err)
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/* Minimal main program -- everything is loaded from the library */
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#include "Python.h"
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#include "internal/pystate.h"
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#include <locale.h>
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#ifdef __FreeBSD__
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#include <fenv.h>
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#endif
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#ifdef MS_WINDOWS
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int
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wmain(int argc, wchar_t **argv)
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{
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return Py_Main(argc, argv);
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}
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#else
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int
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main(int argc, char **argv)
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{
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wchar_t **argv_copy;
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/* We need a second copy, as Python might modify the first one. */
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wchar_t **argv_copy2;
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int i, status;
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char *oldloc;
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_PyInitError err = _PyRuntime_Initialize();
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if (_Py_INIT_FAILED(err)) {
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fprintf(stderr, "Fatal Python error: %s\n", err.msg);
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fflush(stderr);
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exit(1);
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}
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/* Force malloc() allocator to bootstrap Python */
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#ifdef Py_DEBUG
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(void)_PyMem_SetupAllocators("malloc_debug");
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# else
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(void)_PyMem_SetupAllocators("malloc");
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# endif
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argv_copy = (wchar_t **)PyMem_RawMalloc(sizeof(wchar_t*) * (argc+1));
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argv_copy2 = (wchar_t **)PyMem_RawMalloc(sizeof(wchar_t*) * (argc+1));
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if (!argv_copy || !argv_copy2) {
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fprintf(stderr, "out of memory\n");
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return 1;
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}
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/* 754 requires that FP exceptions run in "no stop" mode by default,
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* and until C vendors implement C99's ways to control FP exceptions,
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* Python requires non-stop mode. Alas, some platforms enable FP
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* exceptions by default. Here we disable them.
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*/
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#ifdef __FreeBSD__
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fedisableexcept(FE_OVERFLOW);
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#endif
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oldloc = _PyMem_RawStrdup(setlocale(LC_ALL, NULL));
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if (!oldloc) {
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fprintf(stderr, "out of memory\n");
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return 1;
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}
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/* Reconfigure the locale to the default for this process */
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_Py_SetLocaleFromEnv(LC_ALL);
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/* The legacy C locale assumes ASCII as the default text encoding, which
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* causes problems not only for the CPython runtime, but also other
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* components like GNU readline.
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*
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* Accordingly, when the CLI detects it, it attempts to coerce it to a
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* more capable UTF-8 based alternative.
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*
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* See the documentation of the PYTHONCOERCECLOCALE setting for more
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* details.
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*/
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if (_Py_LegacyLocaleDetected()) {
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_Py_CoerceLegacyLocale();
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}
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/* Convert from char to wchar_t based on the locale settings */
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for (i = 0; i < argc; i++) {
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argv_copy[i] = Py_DecodeLocale(argv[i], NULL);
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if (!argv_copy[i]) {
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PyMem_RawFree(oldloc);
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fprintf(stderr, "Fatal Python error: "
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"unable to decode the command line argument #%i\n",
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i + 1);
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return 1;
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}
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argv_copy2[i] = argv_copy[i];
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}
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argv_copy2[argc] = argv_copy[argc] = NULL;
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setlocale(LC_ALL, oldloc);
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PyMem_RawFree(oldloc);
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status = Py_Main(argc, argv_copy);
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/* Force again malloc() allocator to release memory blocks allocated
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before Py_Main() */
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#ifdef Py_DEBUG
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(void)_PyMem_SetupAllocators("malloc_debug");
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# else
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(void)_PyMem_SetupAllocators("malloc");
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# endif
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for (i = 0; i < argc; i++) {
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PyMem_RawFree(argv_copy2[i]);
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}
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PyMem_RawFree(argv_copy);
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PyMem_RawFree(argv_copy2);
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return status;
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}
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#endif
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