diff options
Diffstat (limited to 'Python/fileutils.c')
| -rw-r--r-- | Python/fileutils.c | 2077 |
1 files changed, 0 insertions, 2077 deletions
diff --git a/Python/fileutils.c b/Python/fileutils.c deleted file mode 100644 index 6345553..0000000 --- a/Python/fileutils.c +++ /dev/null @@ -1,2077 +0,0 @@ -#include "Python.h" -#include "pycore_fileutils.h" -#include "osdefs.h" -#include <locale.h> - -#ifdef MS_WINDOWS -# include <malloc.h> -# include <windows.h> -extern int winerror_to_errno(int); -#endif - -#ifdef HAVE_LANGINFO_H -#include <langinfo.h> -#endif - -#ifdef HAVE_SYS_IOCTL_H -#include <sys/ioctl.h> -#endif - -#ifdef HAVE_FCNTL_H -#include <fcntl.h> -#endif /* HAVE_FCNTL_H */ - -#ifdef O_CLOEXEC -/* Does open() support the O_CLOEXEC flag? Possible values: - - -1: unknown - 0: open() ignores O_CLOEXEC flag, ex: Linux kernel older than 2.6.23 - 1: open() supports O_CLOEXEC flag, close-on-exec is set - - The flag is used by _Py_open(), _Py_open_noraise(), io.FileIO - and os.open(). */ -int _Py_open_cloexec_works = -1; -#endif - - -static int -get_surrogateescape(_Py_error_handler errors, int *surrogateescape) -{ - switch (errors) - { - case _Py_ERROR_STRICT: - *surrogateescape = 0; - return 0; - case _Py_ERROR_SURROGATEESCAPE: - *surrogateescape = 1; - return 0; - default: - return -1; - } -} - - -PyObject * -_Py_device_encoding(int fd) -{ -#if defined(MS_WINDOWS) - UINT cp; -#endif - int valid; - _Py_BEGIN_SUPPRESS_IPH - valid = isatty(fd); - _Py_END_SUPPRESS_IPH - if (!valid) - Py_RETURN_NONE; - -#if defined(MS_WINDOWS) - if (fd == 0) - cp = GetConsoleCP(); - else if (fd == 1 || fd == 2) - cp = GetConsoleOutputCP(); - else - cp = 0; - /* GetConsoleCP() and GetConsoleOutputCP() return 0 if the application - has no console */ - if (cp != 0) - return PyUnicode_FromFormat("cp%u", (unsigned int)cp); -#elif defined(CODESET) - { - char *codeset = nl_langinfo(CODESET); - if (codeset != NULL && codeset[0] != 0) - return PyUnicode_FromString(codeset); - } -#endif - Py_RETURN_NONE; -} - -#if !defined(_Py_FORCE_UTF8_FS_ENCODING) && !defined(MS_WINDOWS) - -#define USE_FORCE_ASCII - -extern int _Py_normalize_encoding(const char *, char *, size_t); - -/* Workaround FreeBSD and OpenIndiana locale encoding issue with the C locale - and POSIX locale. nl_langinfo(CODESET) announces an alias of the - ASCII encoding, whereas mbstowcs() and wcstombs() functions use the - ISO-8859-1 encoding. The problem is that os.fsencode() and os.fsdecode() use - locale.getpreferredencoding() codec. For example, if command line arguments - are decoded by mbstowcs() and encoded back by os.fsencode(), we get a - UnicodeEncodeError instead of retrieving the original byte string. - - The workaround is enabled if setlocale(LC_CTYPE, NULL) returns "C", - nl_langinfo(CODESET) announces "ascii" (or an alias to ASCII), and at least - one byte in range 0x80-0xff can be decoded from the locale encoding. The - workaround is also enabled on error, for example if getting the locale - failed. - - On HP-UX with the C locale or the POSIX locale, nl_langinfo(CODESET) - announces "roman8" but mbstowcs() uses Latin1 in practice. Force also the - ASCII encoding in this case. - - Values of force_ascii: - - 1: the workaround is used: Py_EncodeLocale() uses - encode_ascii_surrogateescape() and Py_DecodeLocale() uses - decode_ascii() - 0: the workaround is not used: Py_EncodeLocale() uses wcstombs() and - Py_DecodeLocale() uses mbstowcs() - -1: unknown, need to call check_force_ascii() to get the value -*/ -static int force_ascii = -1; - -static int -check_force_ascii(void) -{ - char *loc = setlocale(LC_CTYPE, NULL); - if (loc == NULL) { - goto error; - } - if (strcmp(loc, "C") != 0 && strcmp(loc, "POSIX") != 0) { - /* the LC_CTYPE locale is different than C and POSIX */ - return 0; - } - -#if defined(HAVE_LANGINFO_H) && defined(CODESET) - const char *codeset = nl_langinfo(CODESET); - if (!codeset || codeset[0] == '\0') { - /* CODESET is not set or empty */ - goto error; - } - - char encoding[20]; /* longest name: "iso_646.irv_1991\0" */ - if (!_Py_normalize_encoding(codeset, encoding, sizeof(encoding))) { - goto error; - } - -#ifdef __hpux - if (strcmp(encoding, "roman8") == 0) { - unsigned char ch; - wchar_t wch; - size_t res; - - ch = (unsigned char)0xA7; - res = mbstowcs(&wch, (char*)&ch, 1); - if (res != (size_t)-1 && wch == L'\xA7') { - /* On HP-UX withe C locale or the POSIX locale, - nl_langinfo(CODESET) announces "roman8", whereas mbstowcs() uses - Latin1 encoding in practice. Force ASCII in this case. - - Roman8 decodes 0xA7 to U+00CF. Latin1 decodes 0xA7 to U+00A7. */ - return 1; - } - } -#else - const char* ascii_aliases[] = { - "ascii", - /* Aliases from Lib/encodings/aliases.py */ - "646", - "ansi_x3.4_1968", - "ansi_x3.4_1986", - "ansi_x3_4_1968", - "cp367", - "csascii", - "ibm367", - "iso646_us", - "iso_646.irv_1991", - "iso_ir_6", - "us", - "us_ascii", - NULL - }; - - int is_ascii = 0; - for (const char **alias=ascii_aliases; *alias != NULL; alias++) { - if (strcmp(encoding, *alias) == 0) { - is_ascii = 1; - break; - } - } - if (!is_ascii) { - /* nl_langinfo(CODESET) is not "ascii" or an alias of ASCII */ - return 0; - } - - for (unsigned int i=0x80; i<=0xff; i++) { - char ch[1]; - wchar_t wch[1]; - size_t res; - - unsigned uch = (unsigned char)i; - ch[0] = (char)uch; - res = mbstowcs(wch, ch, 1); - if (res != (size_t)-1) { - /* decoding a non-ASCII character from the locale encoding succeed: - the locale encoding is not ASCII, force ASCII */ - return 1; - } - } - /* None of the bytes in the range 0x80-0xff can be decoded from the locale - encoding: the locale encoding is really ASCII */ -#endif /* !defined(__hpux) */ - return 0; -#else - /* nl_langinfo(CODESET) is not available: always force ASCII */ - return 1; -#endif /* defined(HAVE_LANGINFO_H) && defined(CODESET) */ - -error: - /* if an error occurred, force the ASCII encoding */ - return 1; -} - - -int -_Py_GetForceASCII(void) -{ - if (force_ascii == -1) { - force_ascii = check_force_ascii(); - } - return force_ascii; -} - - -void -_Py_ResetForceASCII(void) -{ - force_ascii = -1; -} - - -static int -encode_ascii(const wchar_t *text, char **str, - size_t *error_pos, const char **reason, - int raw_malloc, _Py_error_handler errors) -{ - char *result = NULL, *out; - size_t len, i; - wchar_t ch; - - int surrogateescape; - if (get_surrogateescape(errors, &surrogateescape) < 0) { - return -3; - } - - len = wcslen(text); - - /* +1 for NULL byte */ - if (raw_malloc) { - result = PyMem_RawMalloc(len + 1); - } - else { - result = PyMem_Malloc(len + 1); - } - if (result == NULL) { - return -1; - } - - out = result; - for (i=0; i<len; i++) { - ch = text[i]; - - if (ch <= 0x7f) { - /* ASCII character */ - *out++ = (char)ch; - } - else if (surrogateescape && 0xdc80 <= ch && ch <= 0xdcff) { - /* UTF-8b surrogate */ - *out++ = (char)(ch - 0xdc00); - } - else { - if (raw_malloc) { - PyMem_RawFree(result); - } - else { - PyMem_Free(result); - } - if (error_pos != NULL) { - *error_pos = i; - } - if (reason) { - *reason = "encoding error"; - } - return -2; - } - } - *out = '\0'; - *str = result; - return 0; -} -#else -int -_Py_GetForceASCII(void) -{ - return 0; -} - -void -_Py_ResetForceASCII(void) -{ - /* nothing to do */ -} -#endif /* !defined(_Py_FORCE_UTF8_FS_ENCODING) && !defined(MS_WINDOWS) */ - - -#if !defined(HAVE_MBRTOWC) || defined(USE_FORCE_ASCII) -static int -decode_ascii(const char *arg, wchar_t **wstr, size_t *wlen, - const char **reason, _Py_error_handler errors) -{ - wchar_t *res; - unsigned char *in; - wchar_t *out; - size_t argsize = strlen(arg) + 1; - - int surrogateescape; - if (get_surrogateescape(errors, &surrogateescape) < 0) { - return -3; - } - - if (argsize > PY_SSIZE_T_MAX / sizeof(wchar_t)) { - return -1; - } - res = PyMem_RawMalloc(argsize * sizeof(wchar_t)); - if (!res) { - return -1; - } - - out = res; - for (in = (unsigned char*)arg; *in; in++) { - unsigned char ch = *in; - if (ch < 128) { - *out++ = ch; - } - else { - if (!surrogateescape) { - PyMem_RawFree(res); - if (wlen) { - *wlen = in - (unsigned char*)arg; - } - if (reason) { - *reason = "decoding error"; - } - return -2; - } - *out++ = 0xdc00 + ch; - } - } - *out = 0; - - if (wlen != NULL) { - *wlen = out - res; - } - *wstr = res; - return 0; -} -#endif /* !HAVE_MBRTOWC */ - -static int -decode_current_locale(const char* arg, wchar_t **wstr, size_t *wlen, - const char **reason, _Py_error_handler errors) -{ - wchar_t *res; - size_t argsize; - size_t count; -#ifdef HAVE_MBRTOWC - unsigned char *in; - wchar_t *out; - mbstate_t mbs; -#endif - - int surrogateescape; - if (get_surrogateescape(errors, &surrogateescape) < 0) { - return -3; - } - -#ifdef HAVE_BROKEN_MBSTOWCS - /* Some platforms have a broken implementation of - * mbstowcs which does not count the characters that - * would result from conversion. Use an upper bound. - */ - argsize = strlen(arg); -#else - argsize = mbstowcs(NULL, arg, 0); -#endif - if (argsize != (size_t)-1) { - if (argsize > PY_SSIZE_T_MAX / sizeof(wchar_t) - 1) { - return -1; - } - res = (wchar_t *)PyMem_RawMalloc((argsize + 1) * sizeof(wchar_t)); - if (!res) { - return -1; - } - - count = mbstowcs(res, arg, argsize + 1); - if (count != (size_t)-1) { - wchar_t *tmp; - /* Only use the result if it contains no - surrogate characters. */ - for (tmp = res; *tmp != 0 && - !Py_UNICODE_IS_SURROGATE(*tmp); tmp++) - ; - if (*tmp == 0) { - if (wlen != NULL) { - *wlen = count; - } - *wstr = res; - return 0; - } - } - PyMem_RawFree(res); - } - - /* Conversion failed. Fall back to escaping with surrogateescape. */ -#ifdef HAVE_MBRTOWC - /* Try conversion with mbrtwoc (C99), and escape non-decodable bytes. */ - - /* Overallocate; as multi-byte characters are in the argument, the - actual output could use less memory. */ - argsize = strlen(arg) + 1; - if (argsize > PY_SSIZE_T_MAX / sizeof(wchar_t)) { - return -1; - } - res = (wchar_t*)PyMem_RawMalloc(argsize * sizeof(wchar_t)); - if (!res) { - return -1; - } - - in = (unsigned char*)arg; - out = res; - memset(&mbs, 0, sizeof mbs); - while (argsize) { - size_t converted = mbrtowc(out, (char*)in, argsize, &mbs); - if (converted == 0) { - /* Reached end of string; null char stored. */ - break; - } - - if (converted == (size_t)-2) { - /* Incomplete character. This should never happen, - since we provide everything that we have - - unless there is a bug in the C library, or I - misunderstood how mbrtowc works. */ - goto decode_error; - } - - if (converted == (size_t)-1) { - if (!surrogateescape) { - goto decode_error; - } - - /* Conversion error. Escape as UTF-8b, and start over - in the initial shift state. */ - *out++ = 0xdc00 + *in++; - argsize--; - memset(&mbs, 0, sizeof mbs); - continue; - } - - if (Py_UNICODE_IS_SURROGATE(*out)) { - if (!surrogateescape) { - goto decode_error; - } - - /* Surrogate character. Escape the original - byte sequence with surrogateescape. */ - argsize -= converted; - while (converted--) { - *out++ = 0xdc00 + *in++; - } - continue; - } - /* successfully converted some bytes */ - in += converted; - argsize -= converted; - out++; - } - if (wlen != NULL) { - *wlen = out - res; - } - *wstr = res; - return 0; - -decode_error: - PyMem_RawFree(res); - if (wlen) { - *wlen = in - (unsigned char*)arg; - } - if (reason) { - *reason = "decoding error"; - } - return -2; -#else /* HAVE_MBRTOWC */ - /* Cannot use C locale for escaping; manually escape as if charset - is ASCII (i.e. escape all bytes > 128. This will still roundtrip - correctly in the locale's charset, which must be an ASCII superset. */ - return decode_ascii(arg, wstr, wlen, reason, errors); -#endif /* HAVE_MBRTOWC */ -} - - -/* Decode a byte string from the locale encoding. - - Use the strict error handler if 'surrogateescape' is zero. Use the - surrogateescape error handler if 'surrogateescape' is non-zero: undecodable - bytes are decoded as characters in range U+DC80..U+DCFF. If a byte sequence - can be decoded as a surrogate character, escape the bytes using the - surrogateescape error handler instead of decoding them. - - On success, return 0 and write the newly allocated wide character string into - *wstr (use PyMem_RawFree() to free the memory). If wlen is not NULL, write - the number of wide characters excluding the null character into *wlen. - - On memory allocation failure, return -1. - - On decoding error, return -2. If wlen is not NULL, write the start of - invalid byte sequence in the input string into *wlen. If reason is not NULL, - write the decoding error message into *reason. - - Return -3 if the error handler 'errors' is not supported. - - Use the Py_EncodeLocaleEx() function to encode the character string back to - a byte string. */ -int -_Py_DecodeLocaleEx(const char* arg, wchar_t **wstr, size_t *wlen, - const char **reason, - int current_locale, _Py_error_handler errors) -{ - if (current_locale) { -#ifdef _Py_FORCE_UTF8_LOCALE - return _Py_DecodeUTF8Ex(arg, strlen(arg), wstr, wlen, reason, - errors); -#else - return decode_current_locale(arg, wstr, wlen, reason, errors); -#endif - } - -#ifdef _Py_FORCE_UTF8_FS_ENCODING - return _Py_DecodeUTF8Ex(arg, strlen(arg), wstr, wlen, reason, - errors); -#else - int use_utf8 = (Py_UTF8Mode == 1); -#ifdef MS_WINDOWS - use_utf8 |= !Py_LegacyWindowsFSEncodingFlag; -#endif - if (use_utf8) { - return _Py_DecodeUTF8Ex(arg, strlen(arg), wstr, wlen, reason, - errors); - } - -#ifdef USE_FORCE_ASCII - if (force_ascii == -1) { - force_ascii = check_force_ascii(); - } - - if (force_ascii) { - /* force ASCII encoding to workaround mbstowcs() issue */ - return decode_ascii(arg, wstr, wlen, reason, errors); - } -#endif - - return decode_current_locale(arg, wstr, wlen, reason, errors); -#endif /* !_Py_FORCE_UTF8_FS_ENCODING */ -} - - -/* Decode a byte string from the locale encoding with the - surrogateescape error handler: undecodable bytes are decoded as characters - in range U+DC80..U+DCFF. If a byte sequence can be decoded as a surrogate - character, escape the bytes using the surrogateescape error handler instead - of decoding them. - - Return a pointer to a newly allocated wide character string, use - PyMem_RawFree() to free the memory. If size is not NULL, write the number of - wide characters excluding the null character into *size - - Return NULL on decoding error or memory allocation error. If *size* is not - NULL, *size is set to (size_t)-1 on memory error or set to (size_t)-2 on - decoding error. - - Decoding errors should never happen, unless there is a bug in the C - library. - - Use the Py_EncodeLocale() function to encode the character string back to a - byte string. */ -wchar_t* -Py_DecodeLocale(const char* arg, size_t *wlen) -{ - wchar_t *wstr; - int res = _Py_DecodeLocaleEx(arg, &wstr, wlen, - NULL, 0, - _Py_ERROR_SURROGATEESCAPE); - if (res != 0) { - assert(res != -3); - if (wlen != NULL) { - *wlen = (size_t)res; - } - return NULL; - } - return wstr; -} - - -static int -encode_current_locale(const wchar_t *text, char **str, - size_t *error_pos, const char **reason, - int raw_malloc, _Py_error_handler errors) -{ - const size_t len = wcslen(text); - char *result = NULL, *bytes = NULL; - size_t i, size, converted; - wchar_t c, buf[2]; - - int surrogateescape; - if (get_surrogateescape(errors, &surrogateescape) < 0) { - return -3; - } - - /* The function works in two steps: - 1. compute the length of the output buffer in bytes (size) - 2. outputs the bytes */ - size = 0; - buf[1] = 0; - while (1) { - for (i=0; i < len; i++) { - c = text[i]; - if (c >= 0xdc80 && c <= 0xdcff) { - if (!surrogateescape) { - goto encode_error; - } - /* UTF-8b surrogate */ - if (bytes != NULL) { - *bytes++ = c - 0xdc00; - size--; - } - else { - size++; - } - continue; - } - else { - buf[0] = c; - if (bytes != NULL) { - converted = wcstombs(bytes, buf, size); - } - else { - converted = wcstombs(NULL, buf, 0); - } - if (converted == (size_t)-1) { - goto encode_error; - } - if (bytes != NULL) { - bytes += converted; - size -= converted; - } - else { - size += converted; - } - } - } - if (result != NULL) { - *bytes = '\0'; - break; - } - - size += 1; /* nul byte at the end */ - if (raw_malloc) { - result = PyMem_RawMalloc(size); - } - else { - result = PyMem_Malloc(size); - } - if (result == NULL) { - return -1; - } - bytes = result; - } - *str = result; - return 0; - -encode_error: - if (raw_malloc) { - PyMem_RawFree(result); - } - else { - PyMem_Free(result); - } - if (error_pos != NULL) { - *error_pos = i; - } - if (reason) { - *reason = "encoding error"; - } - return -2; -} - - -/* Encode a string to the locale encoding. - - Parameters: - - * raw_malloc: if non-zero, allocate memory using PyMem_RawMalloc() instead - of PyMem_Malloc(). - * current_locale: if non-zero, use the current LC_CTYPE, otherwise use - Python filesystem encoding. - * errors: error handler like "strict" or "surrogateescape". - - Return value: - - 0: success, *str is set to a newly allocated decoded string. - -1: memory allocation failure - -2: encoding error, set *error_pos and *reason (if set). - -3: the error handler 'errors' is not supported. - */ -static int -encode_locale_ex(const wchar_t *text, char **str, size_t *error_pos, - const char **reason, - int raw_malloc, int current_locale, _Py_error_handler errors) -{ - if (current_locale) { -#ifdef _Py_FORCE_UTF8_LOCALE - return _Py_EncodeUTF8Ex(text, str, error_pos, reason, - raw_malloc, errors); -#else - return encode_current_locale(text, str, error_pos, reason, - raw_malloc, errors); -#endif - } - -#ifdef _Py_FORCE_UTF8_FS_ENCODING - return _Py_EncodeUTF8Ex(text, str, error_pos, reason, - raw_malloc, errors); -#else - int use_utf8 = (Py_UTF8Mode == 1); -#ifdef MS_WINDOWS - use_utf8 |= !Py_LegacyWindowsFSEncodingFlag; -#endif - if (use_utf8) { - return _Py_EncodeUTF8Ex(text, str, error_pos, reason, - raw_malloc, errors); - } - -#ifdef USE_FORCE_ASCII - if (force_ascii == -1) { - force_ascii = check_force_ascii(); - } - - if (force_ascii) { - return encode_ascii(text, str, error_pos, reason, - raw_malloc, errors); - } -#endif - - return encode_current_locale(text, str, error_pos, reason, - raw_malloc, errors); -#endif /* _Py_FORCE_UTF8_FS_ENCODING */ -} - -static char* -encode_locale(const wchar_t *text, size_t *error_pos, - int raw_malloc, int current_locale) -{ - char *str; - int res = encode_locale_ex(text, &str, error_pos, NULL, - raw_malloc, current_locale, - _Py_ERROR_SURROGATEESCAPE); - if (res != -2 && error_pos) { - *error_pos = (size_t)-1; - } - if (res != 0) { - return NULL; - } - return str; -} - -/* Encode a wide character string to the locale encoding with the - surrogateescape error handler: surrogate characters in the range - U+DC80..U+DCFF are converted to bytes 0x80..0xFF. - - Return a pointer to a newly allocated byte string, use PyMem_Free() to free - the memory. Return NULL on encoding or memory allocation error. - - If error_pos is not NULL, *error_pos is set to (size_t)-1 on success, or set - to the index of the invalid character on encoding error. - - Use the Py_DecodeLocale() function to decode the bytes string back to a wide - character string. */ -char* -Py_EncodeLocale(const wchar_t *text, size_t *error_pos) -{ - return encode_locale(text, error_pos, 0, 0); -} - - -/* Similar to Py_EncodeLocale(), but result must be freed by PyMem_RawFree() - instead of PyMem_Free(). */ -char* -_Py_EncodeLocaleRaw(const wchar_t *text, size_t *error_pos) -{ - return encode_locale(text, error_pos, 1, 0); -} - - -int -_Py_EncodeLocaleEx(const wchar_t *text, char **str, - size_t *error_pos, const char **reason, - int current_locale, _Py_error_handler errors) -{ - return encode_locale_ex(text, str, error_pos, reason, 1, - current_locale, errors); -} - - -#ifdef MS_WINDOWS -static __int64 secs_between_epochs = 11644473600; /* Seconds between 1.1.1601 and 1.1.1970 */ - -static void -FILE_TIME_to_time_t_nsec(FILETIME *in_ptr, time_t *time_out, int* nsec_out) -{ - /* XXX endianness. Shouldn't matter, as all Windows implementations are little-endian */ - /* Cannot simply cast and dereference in_ptr, - since it might not be aligned properly */ - __int64 in; - memcpy(&in, in_ptr, sizeof(in)); - *nsec_out = (int)(in % 10000000) * 100; /* FILETIME is in units of 100 nsec. */ - *time_out = Py_SAFE_DOWNCAST((in / 10000000) - secs_between_epochs, __int64, time_t); -} - -void -_Py_time_t_to_FILE_TIME(time_t time_in, int nsec_in, FILETIME *out_ptr) -{ - /* XXX endianness */ - __int64 out; - out = time_in + secs_between_epochs; - out = out * 10000000 + nsec_in / 100; - memcpy(out_ptr, &out, sizeof(out)); -} - -/* Below, we *know* that ugo+r is 0444 */ -#if _S_IREAD != 0400 -#error Unsupported C library -#endif -static int -attributes_to_mode(DWORD attr) -{ - int m = 0; - if (attr & FILE_ATTRIBUTE_DIRECTORY) - m |= _S_IFDIR | 0111; /* IFEXEC for user,group,other */ - else - m |= _S_IFREG; - if (attr & FILE_ATTRIBUTE_READONLY) - m |= 0444; - else - m |= 0666; - return m; -} - -void -_Py_attribute_data_to_stat(BY_HANDLE_FILE_INFORMATION *info, ULONG reparse_tag, - struct _Py_stat_struct *result) -{ - memset(result, 0, sizeof(*result)); - result->st_mode = attributes_to_mode(info->dwFileAttributes); - result->st_size = (((__int64)info->nFileSizeHigh)<<32) + info->nFileSizeLow; - result->st_dev = info->dwVolumeSerialNumber; - result->st_rdev = result->st_dev; - FILE_TIME_to_time_t_nsec(&info->ftCreationTime, &result->st_ctime, &result->st_ctime_nsec); - FILE_TIME_to_time_t_nsec(&info->ftLastWriteTime, &result->st_mtime, &result->st_mtime_nsec); - FILE_TIME_to_time_t_nsec(&info->ftLastAccessTime, &result->st_atime, &result->st_atime_nsec); - result->st_nlink = info->nNumberOfLinks; - result->st_ino = (((uint64_t)info->nFileIndexHigh) << 32) + info->nFileIndexLow; - /* bpo-37834: Only actual symlinks set the S_IFLNK flag. But lstat() will - open other name surrogate reparse points without traversing them. To - detect/handle these, check st_file_attributes and st_reparse_tag. */ - result->st_reparse_tag = reparse_tag; - if (info->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT && - reparse_tag == IO_REPARSE_TAG_SYMLINK) { - /* first clear the S_IFMT bits */ - result->st_mode ^= (result->st_mode & S_IFMT); - /* now set the bits that make this a symlink */ - result->st_mode |= S_IFLNK; - } - result->st_file_attributes = info->dwFileAttributes; -} -#endif - -/* Return information about a file. - - On POSIX, use fstat(). - - On Windows, use GetFileType() and GetFileInformationByHandle() which support - files larger than 2 GiB. fstat() may fail with EOVERFLOW on files larger - than 2 GiB because the file size type is a signed 32-bit integer: see issue - #23152. - - On Windows, set the last Windows error and return nonzero on error. On - POSIX, set errno and return nonzero on error. Fill status and return 0 on - success. */ -int -_Py_fstat_noraise(int fd, struct _Py_stat_struct *status) -{ -#ifdef MS_WINDOWS - BY_HANDLE_FILE_INFORMATION info; - HANDLE h; - int type; - - _Py_BEGIN_SUPPRESS_IPH - h = (HANDLE)_get_osfhandle(fd); - _Py_END_SUPPRESS_IPH - - if (h == INVALID_HANDLE_VALUE) { - /* errno is already set by _get_osfhandle, but we also set - the Win32 error for callers who expect that */ - SetLastError(ERROR_INVALID_HANDLE); - return -1; - } - memset(status, 0, sizeof(*status)); - - type = GetFileType(h); - if (type == FILE_TYPE_UNKNOWN) { - DWORD error = GetLastError(); - if (error != 0) { - errno = winerror_to_errno(error); - return -1; - } - /* else: valid but unknown file */ - } - - if (type != FILE_TYPE_DISK) { - if (type == FILE_TYPE_CHAR) - status->st_mode = _S_IFCHR; - else if (type == FILE_TYPE_PIPE) - status->st_mode = _S_IFIFO; - return 0; - } - - if (!GetFileInformationByHandle(h, &info)) { - /* The Win32 error is already set, but we also set errno for - callers who expect it */ - errno = winerror_to_errno(GetLastError()); - return -1; - } - - _Py_attribute_data_to_stat(&info, 0, status); - /* specific to fstat() */ - status->st_ino = (((uint64_t)info.nFileIndexHigh) << 32) + info.nFileIndexLow; - return 0; -#else - return fstat(fd, status); -#endif -} - -/* Return information about a file. - - On POSIX, use fstat(). - - On Windows, use GetFileType() and GetFileInformationByHandle() which support - files larger than 2 GiB. fstat() may fail with EOVERFLOW on files larger - than 2 GiB because the file size type is a signed 32-bit integer: see issue - #23152. - - Raise an exception and return -1 on error. On Windows, set the last Windows - error on error. On POSIX, set errno on error. Fill status and return 0 on - success. - - Release the GIL to call GetFileType() and GetFileInformationByHandle(), or - to call fstat(). The caller must hold the GIL. */ -int -_Py_fstat(int fd, struct _Py_stat_struct *status) -{ - int res; - - assert(PyGILState_Check()); - - Py_BEGIN_ALLOW_THREADS - res = _Py_fstat_noraise(fd, status); - Py_END_ALLOW_THREADS - - if (res != 0) { -#ifdef MS_WINDOWS - PyErr_SetFromWindowsErr(0); -#else - PyErr_SetFromErrno(PyExc_OSError); -#endif - return -1; - } - return 0; -} - -/* Call _wstat() on Windows, or encode the path to the filesystem encoding and - call stat() otherwise. Only fill st_mode attribute on Windows. - - Return 0 on success, -1 on _wstat() / stat() error, -2 if an exception was - raised. */ - -int -_Py_stat(PyObject *path, struct stat *statbuf) -{ -#ifdef MS_WINDOWS - int err; - struct _stat wstatbuf; - const wchar_t *wpath; - - wpath = _PyUnicode_AsUnicode(path); - if (wpath == NULL) - return -2; - - err = _wstat(wpath, &wstatbuf); - if (!err) - statbuf->st_mode = wstatbuf.st_mode; - return err; -#else - int ret; - PyObject *bytes; - char *cpath; - - bytes = PyUnicode_EncodeFSDefault(path); - if (bytes == NULL) - return -2; - - /* check for embedded null bytes */ - if (PyBytes_AsStringAndSize(bytes, &cpath, NULL) == -1) { - Py_DECREF(bytes); - return -2; - } - - ret = stat(cpath, statbuf); - Py_DECREF(bytes); - return ret; -#endif -} - - -/* This function MUST be kept async-signal-safe on POSIX when raise=0. */ -static int -get_inheritable(int fd, int raise) -{ -#ifdef MS_WINDOWS - HANDLE handle; - DWORD flags; - - _Py_BEGIN_SUPPRESS_IPH - handle = (HANDLE)_get_osfhandle(fd); - _Py_END_SUPPRESS_IPH - if (handle == INVALID_HANDLE_VALUE) { - if (raise) - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - if (!GetHandleInformation(handle, &flags)) { - if (raise) - PyErr_SetFromWindowsErr(0); - return -1; - } - - return (flags & HANDLE_FLAG_INHERIT); -#else - int flags; - - flags = fcntl(fd, F_GETFD, 0); - if (flags == -1) { - if (raise) - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - return !(flags & FD_CLOEXEC); -#endif -} - -/* Get the inheritable flag of the specified file descriptor. - Return 1 if the file descriptor can be inherited, 0 if it cannot, - raise an exception and return -1 on error. */ -int -_Py_get_inheritable(int fd) -{ - return get_inheritable(fd, 1); -} - - -/* This function MUST be kept async-signal-safe on POSIX when raise=0. */ -static int -set_inheritable(int fd, int inheritable, int raise, int *atomic_flag_works) -{ -#ifdef MS_WINDOWS - HANDLE handle; - DWORD flags; -#else -#if defined(HAVE_SYS_IOCTL_H) && defined(FIOCLEX) && defined(FIONCLEX) - static int ioctl_works = -1; - int request; - int err; -#endif - int flags, new_flags; - int res; -#endif - - /* atomic_flag_works can only be used to make the file descriptor - non-inheritable */ - assert(!(atomic_flag_works != NULL && inheritable)); - - if (atomic_flag_works != NULL && !inheritable) { - if (*atomic_flag_works == -1) { - int isInheritable = get_inheritable(fd, raise); - if (isInheritable == -1) - return -1; - *atomic_flag_works = !isInheritable; - } - - if (*atomic_flag_works) - return 0; - } - -#ifdef MS_WINDOWS - _Py_BEGIN_SUPPRESS_IPH - handle = (HANDLE)_get_osfhandle(fd); - _Py_END_SUPPRESS_IPH - if (handle == INVALID_HANDLE_VALUE) { - if (raise) - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - if (inheritable) - flags = HANDLE_FLAG_INHERIT; - else - flags = 0; - - /* This check can be removed once support for Windows 7 ends. */ -#define CONSOLE_PSEUDOHANDLE(handle) (((ULONG_PTR)(handle) & 0x3) == 0x3 && \ - GetFileType(handle) == FILE_TYPE_CHAR) - - if (!CONSOLE_PSEUDOHANDLE(handle) && - !SetHandleInformation(handle, HANDLE_FLAG_INHERIT, flags)) { - if (raise) - PyErr_SetFromWindowsErr(0); - return -1; - } -#undef CONSOLE_PSEUDOHANDLE - return 0; - -#else - -#if defined(HAVE_SYS_IOCTL_H) && defined(FIOCLEX) && defined(FIONCLEX) - if (ioctl_works != 0 && raise != 0) { - /* fast-path: ioctl() only requires one syscall */ - /* caveat: raise=0 is an indicator that we must be async-signal-safe - * thus avoid using ioctl() so we skip the fast-path. */ - if (inheritable) - request = FIONCLEX; - else - request = FIOCLEX; - err = ioctl(fd, request, NULL); - if (!err) { - ioctl_works = 1; - return 0; - } - - if (errno != ENOTTY && errno != EACCES) { - if (raise) - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - else { - /* Issue #22258: Here, ENOTTY means "Inappropriate ioctl for - device". The ioctl is declared but not supported by the kernel. - Remember that ioctl() doesn't work. It is the case on - Illumos-based OS for example. - - Issue #27057: When SELinux policy disallows ioctl it will fail - with EACCES. While FIOCLEX is safe operation it may be - unavailable because ioctl was denied altogether. - This can be the case on Android. */ - ioctl_works = 0; - } - /* fallback to fcntl() if ioctl() does not work */ - } -#endif - - /* slow-path: fcntl() requires two syscalls */ - flags = fcntl(fd, F_GETFD); - if (flags < 0) { - if (raise) - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - if (inheritable) { - new_flags = flags & ~FD_CLOEXEC; - } - else { - new_flags = flags | FD_CLOEXEC; - } - - if (new_flags == flags) { - /* FD_CLOEXEC flag already set/cleared: nothing to do */ - return 0; - } - - res = fcntl(fd, F_SETFD, new_flags); - if (res < 0) { - if (raise) - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - return 0; -#endif -} - -/* Make the file descriptor non-inheritable. - Return 0 on success, set errno and return -1 on error. */ -static int -make_non_inheritable(int fd) -{ - return set_inheritable(fd, 0, 0, NULL); -} - -/* Set the inheritable flag of the specified file descriptor. - On success: return 0, on error: raise an exception and return -1. - - If atomic_flag_works is not NULL: - - * if *atomic_flag_works==-1, check if the inheritable is set on the file - descriptor: if yes, set *atomic_flag_works to 1, otherwise set to 0 and - set the inheritable flag - * if *atomic_flag_works==1: do nothing - * if *atomic_flag_works==0: set inheritable flag to False - - Set atomic_flag_works to NULL if no atomic flag was used to create the - file descriptor. - - atomic_flag_works can only be used to make a file descriptor - non-inheritable: atomic_flag_works must be NULL if inheritable=1. */ -int -_Py_set_inheritable(int fd, int inheritable, int *atomic_flag_works) -{ - return set_inheritable(fd, inheritable, 1, atomic_flag_works); -} - -/* Same as _Py_set_inheritable() but on error, set errno and - don't raise an exception. - This function is async-signal-safe. */ -int -_Py_set_inheritable_async_safe(int fd, int inheritable, int *atomic_flag_works) -{ - return set_inheritable(fd, inheritable, 0, atomic_flag_works); -} - -static int -_Py_open_impl(const char *pathname, int flags, int gil_held) -{ - int fd; - int async_err = 0; -#ifndef MS_WINDOWS - int *atomic_flag_works; -#endif - -#ifdef MS_WINDOWS - flags |= O_NOINHERIT; -#elif defined(O_CLOEXEC) - atomic_flag_works = &_Py_open_cloexec_works; - flags |= O_CLOEXEC; -#else - atomic_flag_works = NULL; -#endif - - if (gil_held) { - if (PySys_Audit("open", "sOi", pathname, Py_None, flags) < 0) { - return -1; - } - - do { - Py_BEGIN_ALLOW_THREADS - fd = open(pathname, flags); - Py_END_ALLOW_THREADS - } while (fd < 0 - && errno == EINTR && !(async_err = PyErr_CheckSignals())); - if (async_err) - return -1; - if (fd < 0) { - PyErr_SetFromErrnoWithFilename(PyExc_OSError, pathname); - return -1; - } - } - else { - fd = open(pathname, flags); - if (fd < 0) - return -1; - } - -#ifndef MS_WINDOWS - if (set_inheritable(fd, 0, gil_held, atomic_flag_works) < 0) { - close(fd); - return -1; - } -#endif - - return fd; -} - -/* Open a file with the specified flags (wrapper to open() function). - Return a file descriptor on success. Raise an exception and return -1 on - error. - - The file descriptor is created non-inheritable. - - When interrupted by a signal (open() fails with EINTR), retry the syscall, - except if the Python signal handler raises an exception. - - Release the GIL to call open(). The caller must hold the GIL. */ -int -_Py_open(const char *pathname, int flags) -{ - /* _Py_open() must be called with the GIL held. */ - assert(PyGILState_Check()); - return _Py_open_impl(pathname, flags, 1); -} - -/* Open a file with the specified flags (wrapper to open() function). - Return a file descriptor on success. Set errno and return -1 on error. - - The file descriptor is created non-inheritable. - - If interrupted by a signal, fail with EINTR. */ -int -_Py_open_noraise(const char *pathname, int flags) -{ - return _Py_open_impl(pathname, flags, 0); -} - -/* Open a file. Use _wfopen() on Windows, encode the path to the locale - encoding and use fopen() otherwise. - - The file descriptor is created non-inheritable. - - If interrupted by a signal, fail with EINTR. */ -FILE * -_Py_wfopen(const wchar_t *path, const wchar_t *mode) -{ - FILE *f; - if (PySys_Audit("open", "uui", path, mode, 0) < 0) { - return NULL; - } -#ifndef MS_WINDOWS - char *cpath; - char cmode[10]; - size_t r; - r = wcstombs(cmode, mode, 10); - if (r == (size_t)-1 || r >= 10) { - errno = EINVAL; - return NULL; - } - cpath = _Py_EncodeLocaleRaw(path, NULL); - if (cpath == NULL) { - return NULL; - } - f = fopen(cpath, cmode); - PyMem_RawFree(cpath); -#else - f = _wfopen(path, mode); -#endif - if (f == NULL) - return NULL; - if (make_non_inheritable(fileno(f)) < 0) { - fclose(f); - return NULL; - } - return f; -} - -/* Wrapper to fopen(). - - The file descriptor is created non-inheritable. - - If interrupted by a signal, fail with EINTR. */ -FILE* -_Py_fopen(const char *pathname, const char *mode) -{ - if (PySys_Audit("open", "ssi", pathname, mode, 0) < 0) { - return NULL; - } - - FILE *f = fopen(pathname, mode); - if (f == NULL) - return NULL; - if (make_non_inheritable(fileno(f)) < 0) { - fclose(f); - return NULL; - } - return f; -} - -/* Open a file. Call _wfopen() on Windows, or encode the path to the filesystem - encoding and call fopen() otherwise. - - Return the new file object on success. Raise an exception and return NULL - on error. - - The file descriptor is created non-inheritable. - - When interrupted by a signal (open() fails with EINTR), retry the syscall, - except if the Python signal handler raises an exception. - - Release the GIL to call _wfopen() or fopen(). The caller must hold - the GIL. */ -FILE* -_Py_fopen_obj(PyObject *path, const char *mode) -{ - FILE *f; - int async_err = 0; -#ifdef MS_WINDOWS - const wchar_t *wpath; - wchar_t wmode[10]; - int usize; - - assert(PyGILState_Check()); - - if (PySys_Audit("open", "Osi", path, mode, 0) < 0) { - return NULL; - } - if (!PyUnicode_Check(path)) { - PyErr_Format(PyExc_TypeError, - "str file path expected under Windows, got %R", - Py_TYPE(path)); - return NULL; - } - wpath = _PyUnicode_AsUnicode(path); - if (wpath == NULL) - return NULL; - - usize = MultiByteToWideChar(CP_ACP, 0, mode, -1, - wmode, Py_ARRAY_LENGTH(wmode)); - if (usize == 0) { - PyErr_SetFromWindowsErr(0); - return NULL; - } - - do { - Py_BEGIN_ALLOW_THREADS - f = _wfopen(wpath, wmode); - Py_END_ALLOW_THREADS - } while (f == NULL - && errno == EINTR && !(async_err = PyErr_CheckSignals())); -#else - PyObject *bytes; - char *path_bytes; - - assert(PyGILState_Check()); - - if (!PyUnicode_FSConverter(path, &bytes)) - return NULL; - path_bytes = PyBytes_AS_STRING(bytes); - - if (PySys_Audit("open", "Osi", path, mode, 0) < 0) { - return NULL; - } - - do { - Py_BEGIN_ALLOW_THREADS - f = fopen(path_bytes, mode); - Py_END_ALLOW_THREADS - } while (f == NULL - && errno == EINTR && !(async_err = PyErr_CheckSignals())); - - Py_DECREF(bytes); -#endif - if (async_err) - return NULL; - - if (f == NULL) { - PyErr_SetFromErrnoWithFilenameObject(PyExc_OSError, path); - return NULL; - } - - if (set_inheritable(fileno(f), 0, 1, NULL) < 0) { - fclose(f); - return NULL; - } - return f; -} - -/* Read count bytes from fd into buf. - - On success, return the number of read bytes, it can be lower than count. - If the current file offset is at or past the end of file, no bytes are read, - and read() returns zero. - - On error, raise an exception, set errno and return -1. - - When interrupted by a signal (read() fails with EINTR), retry the syscall. - If the Python signal handler raises an exception, the function returns -1 - (the syscall is not retried). - - Release the GIL to call read(). The caller must hold the GIL. */ -Py_ssize_t -_Py_read(int fd, void *buf, size_t count) -{ - Py_ssize_t n; - int err; - int async_err = 0; - - assert(PyGILState_Check()); - - /* _Py_read() must not be called with an exception set, otherwise the - * caller may think that read() was interrupted by a signal and the signal - * handler raised an exception. */ - assert(!PyErr_Occurred()); - - if (count > _PY_READ_MAX) { - count = _PY_READ_MAX; - } - - _Py_BEGIN_SUPPRESS_IPH - do { - Py_BEGIN_ALLOW_THREADS - errno = 0; -#ifdef MS_WINDOWS - n = read(fd, buf, (int)count); -#else - n = read(fd, buf, count); -#endif - /* save/restore errno because PyErr_CheckSignals() - * and PyErr_SetFromErrno() can modify it */ - err = errno; - Py_END_ALLOW_THREADS - } while (n < 0 && err == EINTR && - !(async_err = PyErr_CheckSignals())); - _Py_END_SUPPRESS_IPH - - if (async_err) { - /* read() was interrupted by a signal (failed with EINTR) - * and the Python signal handler raised an exception */ - errno = err; - assert(errno == EINTR && PyErr_Occurred()); - return -1; - } - if (n < 0) { - PyErr_SetFromErrno(PyExc_OSError); - errno = err; - return -1; - } - - return n; -} - -static Py_ssize_t -_Py_write_impl(int fd, const void *buf, size_t count, int gil_held) -{ - Py_ssize_t n; - int err; - int async_err = 0; - - _Py_BEGIN_SUPPRESS_IPH -#ifdef MS_WINDOWS - if (count > 32767 && isatty(fd)) { - /* Issue #11395: the Windows console returns an error (12: not - enough space error) on writing into stdout if stdout mode is - binary and the length is greater than 66,000 bytes (or less, - depending on heap usage). */ - count = 32767; - } -#endif - if (count > _PY_WRITE_MAX) { - count = _PY_WRITE_MAX; - } - - if (gil_held) { - do { - Py_BEGIN_ALLOW_THREADS - errno = 0; -#ifdef MS_WINDOWS - n = write(fd, buf, (int)count); -#else - n = write(fd, buf, count); -#endif - /* save/restore errno because PyErr_CheckSignals() - * and PyErr_SetFromErrno() can modify it */ - err = errno; - Py_END_ALLOW_THREADS - } while (n < 0 && err == EINTR && - !(async_err = PyErr_CheckSignals())); - } - else { - do { - errno = 0; -#ifdef MS_WINDOWS - n = write(fd, buf, (int)count); -#else - n = write(fd, buf, count); -#endif - err = errno; - } while (n < 0 && err == EINTR); - } - _Py_END_SUPPRESS_IPH - - if (async_err) { - /* write() was interrupted by a signal (failed with EINTR) - and the Python signal handler raised an exception (if gil_held is - nonzero). */ - errno = err; - assert(errno == EINTR && (!gil_held || PyErr_Occurred())); - return -1; - } - if (n < 0) { - if (gil_held) - PyErr_SetFromErrno(PyExc_OSError); - errno = err; - return -1; - } - - return n; -} - -/* Write count bytes of buf into fd. - - On success, return the number of written bytes, it can be lower than count - including 0. On error, raise an exception, set errno and return -1. - - When interrupted by a signal (write() fails with EINTR), retry the syscall. - If the Python signal handler raises an exception, the function returns -1 - (the syscall is not retried). - - Release the GIL to call write(). The caller must hold the GIL. */ -Py_ssize_t -_Py_write(int fd, const void *buf, size_t count) -{ - assert(PyGILState_Check()); - - /* _Py_write() must not be called with an exception set, otherwise the - * caller may think that write() was interrupted by a signal and the signal - * handler raised an exception. */ - assert(!PyErr_Occurred()); - - return _Py_write_impl(fd, buf, count, 1); -} - -/* Write count bytes of buf into fd. - * - * On success, return the number of written bytes, it can be lower than count - * including 0. On error, set errno and return -1. - * - * When interrupted by a signal (write() fails with EINTR), retry the syscall - * without calling the Python signal handler. */ -Py_ssize_t -_Py_write_noraise(int fd, const void *buf, size_t count) -{ - return _Py_write_impl(fd, buf, count, 0); -} - -#ifdef HAVE_READLINK - -/* Read value of symbolic link. Encode the path to the locale encoding, decode - the result from the locale encoding. - - Return -1 on encoding error, on readlink() error, if the internal buffer is - too short, on decoding error, or if 'buf' is too short. */ -int -_Py_wreadlink(const wchar_t *path, wchar_t *buf, size_t buflen) -{ - char *cpath; - char cbuf[MAXPATHLEN]; - size_t cbuf_len = Py_ARRAY_LENGTH(cbuf); - wchar_t *wbuf; - Py_ssize_t res; - size_t r1; - - cpath = _Py_EncodeLocaleRaw(path, NULL); - if (cpath == NULL) { - errno = EINVAL; - return -1; - } - res = readlink(cpath, cbuf, cbuf_len); - PyMem_RawFree(cpath); - if (res == -1) { - return -1; - } - if ((size_t)res == cbuf_len) { - errno = EINVAL; - return -1; - } - cbuf[res] = '\0'; /* buf will be null terminated */ - wbuf = Py_DecodeLocale(cbuf, &r1); - if (wbuf == NULL) { - errno = EINVAL; - return -1; - } - /* wbuf must have space to store the trailing NUL character */ - if (buflen <= r1) { - PyMem_RawFree(wbuf); - errno = EINVAL; - return -1; - } - wcsncpy(buf, wbuf, buflen); - PyMem_RawFree(wbuf); - return (int)r1; -} -#endif - -#ifdef HAVE_REALPATH - -/* Return the canonicalized absolute pathname. Encode path to the locale - encoding, decode the result from the locale encoding. - - Return NULL on encoding error, realpath() error, decoding error - or if 'resolved_path' is too short. */ -wchar_t* -_Py_wrealpath(const wchar_t *path, - wchar_t *resolved_path, size_t resolved_path_len) -{ - char *cpath; - char cresolved_path[MAXPATHLEN]; - wchar_t *wresolved_path; - char *res; - size_t r; - cpath = _Py_EncodeLocaleRaw(path, NULL); - if (cpath == NULL) { - errno = EINVAL; - return NULL; - } - res = realpath(cpath, cresolved_path); - PyMem_RawFree(cpath); - if (res == NULL) - return NULL; - - wresolved_path = Py_DecodeLocale(cresolved_path, &r); - if (wresolved_path == NULL) { - errno = EINVAL; - return NULL; - } - /* wresolved_path must have space to store the trailing NUL character */ - if (resolved_path_len <= r) { - PyMem_RawFree(wresolved_path); - errno = EINVAL; - return NULL; - } - wcsncpy(resolved_path, wresolved_path, resolved_path_len); - PyMem_RawFree(wresolved_path); - return resolved_path; -} -#endif - - -#ifndef MS_WINDOWS -int -_Py_isabs(const wchar_t *path) -{ - return (path[0] == SEP); -} -#endif - - -/* Get an absolute path. - On error (ex: fail to get the current directory), return -1. - On memory allocation failure, set *abspath_p to NULL and return 0. - On success, return a newly allocated to *abspath_p to and return 0. - The string must be freed by PyMem_RawFree(). */ -int -_Py_abspath(const wchar_t *path, wchar_t **abspath_p) -{ -#ifdef MS_WINDOWS - wchar_t woutbuf[MAX_PATH], *woutbufp = woutbuf; - DWORD result; - - result = GetFullPathNameW(path, - Py_ARRAY_LENGTH(woutbuf), woutbuf, - NULL); - if (!result) { - return -1; - } - - if (result > Py_ARRAY_LENGTH(woutbuf)) { - if ((size_t)result <= (size_t)PY_SSIZE_T_MAX / sizeof(wchar_t)) { - woutbufp = PyMem_RawMalloc((size_t)result * sizeof(wchar_t)); - } - else { - woutbufp = NULL; - } - if (!woutbufp) { - *abspath_p = NULL; - return 0; - } - - result = GetFullPathNameW(path, result, woutbufp, NULL); - if (!result) { - PyMem_RawFree(woutbufp); - return -1; - } - } - - if (woutbufp != woutbuf) { - *abspath_p = woutbufp; - return 0; - } - - *abspath_p = _PyMem_RawWcsdup(woutbufp); - return 0; -#else - if (_Py_isabs(path)) { - *abspath_p = _PyMem_RawWcsdup(path); - return 0; - } - - wchar_t cwd[MAXPATHLEN + 1]; - cwd[Py_ARRAY_LENGTH(cwd) - 1] = 0; - if (!_Py_wgetcwd(cwd, Py_ARRAY_LENGTH(cwd) - 1)) { - /* unable to get the current directory */ - return -1; - } - - size_t cwd_len = wcslen(cwd); - size_t path_len = wcslen(path); - size_t len = cwd_len + 1 + path_len + 1; - if (len <= (size_t)PY_SSIZE_T_MAX / sizeof(wchar_t)) { - *abspath_p = PyMem_RawMalloc(len * sizeof(wchar_t)); - } - else { - *abspath_p = NULL; - } - if (*abspath_p == NULL) { - return 0; - } - - wchar_t *abspath = *abspath_p; - memcpy(abspath, cwd, cwd_len * sizeof(wchar_t)); - abspath += cwd_len; - - *abspath = (wchar_t)SEP; - abspath++; - - memcpy(abspath, path, path_len * sizeof(wchar_t)); - abspath += path_len; - - *abspath = 0; - return 0; -#endif -} - - -/* Get the current directory. buflen is the buffer size in wide characters - including the null character. Decode the path from the locale encoding. - - Return NULL on getcwd() error, on decoding error, or if 'buf' is - too short. */ -wchar_t* -_Py_wgetcwd(wchar_t *buf, size_t buflen) -{ -#ifdef MS_WINDOWS - int ibuflen = (int)Py_MIN(buflen, INT_MAX); - return _wgetcwd(buf, ibuflen); -#else - char fname[MAXPATHLEN]; - wchar_t *wname; - size_t len; - - if (getcwd(fname, Py_ARRAY_LENGTH(fname)) == NULL) - return NULL; - wname = Py_DecodeLocale(fname, &len); - if (wname == NULL) - return NULL; - /* wname must have space to store the trailing NUL character */ - if (buflen <= len) { - PyMem_RawFree(wname); - return NULL; - } - wcsncpy(buf, wname, buflen); - PyMem_RawFree(wname); - return buf; -#endif -} - -/* Duplicate a file descriptor. The new file descriptor is created as - non-inheritable. Return a new file descriptor on success, raise an OSError - exception and return -1 on error. - - The GIL is released to call dup(). The caller must hold the GIL. */ -int -_Py_dup(int fd) -{ -#ifdef MS_WINDOWS - HANDLE handle; -#endif - - assert(PyGILState_Check()); - -#ifdef MS_WINDOWS - _Py_BEGIN_SUPPRESS_IPH - handle = (HANDLE)_get_osfhandle(fd); - _Py_END_SUPPRESS_IPH - if (handle == INVALID_HANDLE_VALUE) { - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - Py_BEGIN_ALLOW_THREADS - _Py_BEGIN_SUPPRESS_IPH - fd = dup(fd); - _Py_END_SUPPRESS_IPH - Py_END_ALLOW_THREADS - if (fd < 0) { - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - if (_Py_set_inheritable(fd, 0, NULL) < 0) { - _Py_BEGIN_SUPPRESS_IPH - close(fd); - _Py_END_SUPPRESS_IPH - return -1; - } -#elif defined(HAVE_FCNTL_H) && defined(F_DUPFD_CLOEXEC) - Py_BEGIN_ALLOW_THREADS - _Py_BEGIN_SUPPRESS_IPH - fd = fcntl(fd, F_DUPFD_CLOEXEC, 0); - _Py_END_SUPPRESS_IPH - Py_END_ALLOW_THREADS - if (fd < 0) { - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - -#else - Py_BEGIN_ALLOW_THREADS - _Py_BEGIN_SUPPRESS_IPH - fd = dup(fd); - _Py_END_SUPPRESS_IPH - Py_END_ALLOW_THREADS - if (fd < 0) { - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - if (_Py_set_inheritable(fd, 0, NULL) < 0) { - _Py_BEGIN_SUPPRESS_IPH - close(fd); - _Py_END_SUPPRESS_IPH - return -1; - } -#endif - return fd; -} - -#ifndef MS_WINDOWS -/* Get the blocking mode of the file descriptor. - Return 0 if the O_NONBLOCK flag is set, 1 if the flag is cleared, - raise an exception and return -1 on error. */ -int -_Py_get_blocking(int fd) -{ - int flags; - _Py_BEGIN_SUPPRESS_IPH - flags = fcntl(fd, F_GETFL, 0); - _Py_END_SUPPRESS_IPH - if (flags < 0) { - PyErr_SetFromErrno(PyExc_OSError); - return -1; - } - - return !(flags & O_NONBLOCK); -} - -/* Set the blocking mode of the specified file descriptor. - - Set the O_NONBLOCK flag if blocking is False, clear the O_NONBLOCK flag - otherwise. - - Return 0 on success, raise an exception and return -1 on error. */ -int -_Py_set_blocking(int fd, int blocking) -{ -#if defined(HAVE_SYS_IOCTL_H) && defined(FIONBIO) - int arg = !blocking; - if (ioctl(fd, FIONBIO, &arg) < 0) - goto error; -#else - int flags, res; - - _Py_BEGIN_SUPPRESS_IPH - flags = fcntl(fd, F_GETFL, 0); - if (flags >= 0) { - if (blocking) - flags = flags & (~O_NONBLOCK); - else - flags = flags | O_NONBLOCK; - - res = fcntl(fd, F_SETFL, flags); - } else { - res = -1; - } - _Py_END_SUPPRESS_IPH - - if (res < 0) - goto error; -#endif - return 0; - -error: - PyErr_SetFromErrno(PyExc_OSError); - return -1; -} -#endif - - -int -_Py_GetLocaleconvNumeric(struct lconv *lc, - PyObject **decimal_point, PyObject **thousands_sep) -{ - assert(decimal_point != NULL); - assert(thousands_sep != NULL); - - int change_locale = 0; - if ((strlen(lc->decimal_point) > 1 || ((unsigned char)lc->decimal_point[0]) > 127)) { - change_locale = 1; - } - if ((strlen(lc->thousands_sep) > 1 || ((unsigned char)lc->thousands_sep[0]) > 127)) { - change_locale = 1; - } - - /* Keep a copy of the LC_CTYPE locale */ - char *oldloc = NULL, *loc = NULL; - if (change_locale) { - oldloc = setlocale(LC_CTYPE, NULL); - if (!oldloc) { - PyErr_SetString(PyExc_RuntimeWarning, - "failed to get LC_CTYPE locale"); - return -1; - } - - oldloc = _PyMem_Strdup(oldloc); - if (!oldloc) { - PyErr_NoMemory(); - return -1; - } - - loc = setlocale(LC_NUMERIC, NULL); - if (loc != NULL && strcmp(loc, oldloc) == 0) { - loc = NULL; - } - - if (loc != NULL) { - /* Only set the locale temporarily the LC_CTYPE locale - if LC_NUMERIC locale is different than LC_CTYPE locale and - decimal_point and/or thousands_sep are non-ASCII or longer than - 1 byte */ - setlocale(LC_CTYPE, loc); - } - } - - int res = -1; - - *decimal_point = PyUnicode_DecodeLocale(lc->decimal_point, NULL); - if (*decimal_point == NULL) { - goto done; - } - - *thousands_sep = PyUnicode_DecodeLocale(lc->thousands_sep, NULL); - if (*thousands_sep == NULL) { - goto done; - } - - res = 0; - -done: - if (loc != NULL) { - setlocale(LC_CTYPE, oldloc); - } - PyMem_Free(oldloc); - return res; -} |