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posixmodule.c
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posixmodule.c
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/* POSIX module implementation */
/* This file is also used for Windows NT/MS-Win and OS/2. In that case the
module actually calls itself 'nt' or 'os2', not 'posix', and a few
functions are either unimplemented or implemented differently. The source
assumes that for Windows NT, the macro 'MS_WINDOWS' is defined independent
of the compiler used. Different compilers define their own feature
test macro, e.g. '__BORLANDC__' or '_MSC_VER'. For OS/2, the compiler
independent macro PYOS_OS2 should be defined. On OS/2 the default
compiler is assumed to be IBM's VisualAge C++ (VACPP). PYCC_GCC is used
as the compiler specific macro for the EMX port of gcc to OS/2. */
/* See also ../Dos/dosmodule.c */
#ifdef __APPLE__
/*
* Step 1 of support for weak-linking a number of symbols existing on
* OSX 10.4 and later, see the comment in the #ifdef __APPLE__ block
* at the end of this file for more information.
*/
# pragma weak lchown
# pragma weak statvfs
# pragma weak fstatvfs
#endif /* __APPLE__ */
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "structseq.h"
#if defined(__VMS)
# include <unixio.h>
#endif /* defined(__VMS) */
#ifdef __cplusplus
extern "C" {
#endif
PyDoc_STRVAR(posix__doc__,
"This module provides access to operating system functionality that is\n\
standardized by the C Standard and the POSIX standard (a thinly\n\
disguised Unix interface). Refer to the library manual and\n\
corresponding Unix manual entries for more information on calls.");
#ifndef Py_USING_UNICODE
/* This is used in signatures of functions. */
#define Py_UNICODE void
#endif
#if defined(PYOS_OS2)
#define INCL_DOS
#define INCL_DOSERRORS
#define INCL_DOSPROCESS
#define INCL_NOPMAPI
#include <os2.h>
#if defined(PYCC_GCC)
#include <ctype.h>
#include <io.h>
#include <stdio.h>
#include <process.h>
#endif
#include "osdefs.h"
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif /* HAVE_SYS_STAT_H */
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h> /* For WNOHANG */
#endif
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif /* HAVE_FCNTL_H */
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_SYSEXITS_H
#include <sysexits.h>
#endif /* HAVE_SYSEXITS_H */
#ifdef HAVE_SYS_LOADAVG_H
#include <sys/loadavg.h>
#endif
/* Various compilers have only certain posix functions */
/* XXX Gosh I wish these were all moved into pyconfig.h */
#if defined(PYCC_VACPP) && defined(PYOS_OS2)
#include <process.h>
#else
#if defined(__WATCOMC__) && !defined(__QNX__) /* Watcom compiler */
#define HAVE_GETCWD 1
#define HAVE_OPENDIR 1
#define HAVE_SYSTEM 1
#if defined(__OS2__)
#define HAVE_EXECV 1
#define HAVE_WAIT 1
#endif
#include <process.h>
#else
#ifdef __BORLANDC__ /* Borland compiler */
#define HAVE_EXECV 1
#define HAVE_GETCWD 1
#define HAVE_OPENDIR 1
#define HAVE_PIPE 1
#define HAVE_POPEN 1
#define HAVE_SYSTEM 1
#define HAVE_WAIT 1
#else
#ifdef _MSC_VER /* Microsoft compiler */
#define HAVE_GETCWD 1
#define HAVE_SPAWNV 1
#define HAVE_EXECV 1
#define HAVE_PIPE 1
#define HAVE_POPEN 1
#define HAVE_SYSTEM 1
#define HAVE_CWAIT 1
#define HAVE_FSYNC 1
#define fsync _commit
#else
#if defined(PYOS_OS2) && defined(PYCC_GCC) || defined(__VMS)
/* Everything needed is defined in PC/os2emx/pyconfig.h or vms/pyconfig.h */
#else /* all other compilers */
/* Unix functions that the configure script doesn't check for */
#define HAVE_EXECV 1
#define HAVE_FORK 1
#if defined(__USLC__) && defined(__SCO_VERSION__) /* SCO UDK Compiler */
#define HAVE_FORK1 1
#endif
#define HAVE_GETCWD 1
#define HAVE_GETEGID 1
#define HAVE_GETEUID 1
#define HAVE_GETGID 1
#define HAVE_GETPPID 1
#define HAVE_GETUID 1
#define HAVE_KILL 1
#define HAVE_OPENDIR 1
#define HAVE_PIPE 1
#ifndef __rtems__
#define HAVE_POPEN 1
#endif
#define HAVE_SYSTEM 1
#define HAVE_WAIT 1
#define HAVE_TTYNAME 1
#endif /* PYOS_OS2 && PYCC_GCC && __VMS */
#endif /* _MSC_VER */
#endif /* __BORLANDC__ */
#endif /* ! __WATCOMC__ || __QNX__ */
#endif /* ! __IBMC__ */
#ifndef _MSC_VER
#if defined(__sgi)&&_COMPILER_VERSION>=700
/* declare ctermid_r if compiling with MIPSPro 7.x in ANSI C mode
(default) */
extern char *ctermid_r(char *);
#endif
#ifndef HAVE_UNISTD_H
#if defined(PYCC_VACPP)
extern int mkdir(char *);
#else
#if ( defined(__WATCOMC__) || defined(_MSC_VER) ) && !defined(__QNX__)
extern int mkdir(const char *);
#else
extern int mkdir(const char *, mode_t);
#endif
#endif
#if defined(__IBMC__) || defined(__IBMCPP__)
extern int chdir(char *);
extern int rmdir(char *);
#else
extern int chdir(const char *);
extern int rmdir(const char *);
#endif
#ifdef __BORLANDC__
extern int chmod(const char *, int);
#else
extern int chmod(const char *, mode_t);
#endif
extern int chown(const char *, uid_t, gid_t);
extern char *getcwd(char *, int);
extern char *strerror(int);
extern int link(const char *, const char *);
extern int rename(const char *, const char *);
extern int stat(const char *, struct stat *);
extern int unlink(const char *);
extern int pclose(FILE *);
#ifdef HAVE_SYMLINK
extern int symlink(const char *, const char *);
#endif /* HAVE_SYMLINK */
#ifdef HAVE_LSTAT
extern int lstat(const char *, struct stat *);
#endif /* HAVE_LSTAT */
#endif /* !HAVE_UNISTD_H */
#endif /* !_MSC_VER */
#ifdef HAVE_UTIME_H
#include <utime.h>
#endif /* HAVE_UTIME_H */
#ifdef HAVE_SYS_UTIME_H
#include <sys/utime.h>
#define HAVE_UTIME_H /* pretend we do for the rest of this file */
#endif /* HAVE_SYS_UTIME_H */
#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif /* HAVE_SYS_TIMES_H */
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif /* HAVE_SYS_PARAM_H */
#ifdef HAVE_SYS_UTSNAME_H
#include <sys/utsname.h>
#endif /* HAVE_SYS_UTSNAME_H */
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#define NAMLEN(dirent) strlen((dirent)->d_name)
#else
#if defined(__WATCOMC__) && !defined(__QNX__)
#include <direct.h>
#define NAMLEN(dirent) strlen((dirent)->d_name)
#else
#define dirent direct
#define NAMLEN(dirent) (dirent)->d_namlen
#endif
#ifdef HAVE_SYS_NDIR_H
#include <sys/ndir.h>
#endif
#ifdef HAVE_SYS_DIR_H
#include <sys/dir.h>
#endif
#ifdef HAVE_NDIR_H
#include <ndir.h>
#endif
#endif
#ifdef _MSC_VER
#ifdef HAVE_DIRECT_H
#include <direct.h>
#endif
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifdef HAVE_PROCESS_H
#include <process.h>
#endif
#include "osdefs.h"
#define _WIN32_WINNT 0x0400 /* Needed for CryptoAPI on some systems */
#include <windows.h>
#include <shellapi.h> /* for ShellExecute() */
#define popen _popen
#define pclose _pclose
#endif /* _MSC_VER */
#if defined(PYCC_VACPP) && defined(PYOS_OS2)
#include <io.h>
#endif /* OS2 */
#ifndef MAXPATHLEN
#if defined(PATH_MAX) && PATH_MAX > 1024
#define MAXPATHLEN PATH_MAX
#else
#define MAXPATHLEN 1024
#endif
#endif /* MAXPATHLEN */
#ifdef UNION_WAIT
/* Emulate some macros on systems that have a union instead of macros */
#ifndef WIFEXITED
#define WIFEXITED(u_wait) (!(u_wait).w_termsig && !(u_wait).w_coredump)
#endif
#ifndef WEXITSTATUS
#define WEXITSTATUS(u_wait) (WIFEXITED(u_wait)?((u_wait).w_retcode):-1)
#endif
#ifndef WTERMSIG
#define WTERMSIG(u_wait) ((u_wait).w_termsig)
#endif
#define WAIT_TYPE union wait
#define WAIT_STATUS_INT(s) (s.w_status)
#else /* !UNION_WAIT */
#define WAIT_TYPE int
#define WAIT_STATUS_INT(s) (s)
#endif /* UNION_WAIT */
/* Don't use the "_r" form if we don't need it (also, won't have a
prototype for it, at least on Solaris -- maybe others as well?). */
#if defined(HAVE_CTERMID_R) && defined(WITH_THREAD)
#define USE_CTERMID_R
#endif
#if defined(HAVE_TMPNAM_R) && defined(WITH_THREAD)
#define USE_TMPNAM_R
#endif
/* choose the appropriate stat and fstat functions and return structs */
#undef STAT
#if defined(MS_WIN64) || defined(MS_WINDOWS)
# define STAT win32_stat
# define FSTAT win32_fstat
# define STRUCT_STAT struct win32_stat
#else
# define STAT stat
# define FSTAT fstat
# define STRUCT_STAT struct stat
#endif
#if defined(MAJOR_IN_MKDEV)
#include <sys/mkdev.h>
#else
#if defined(MAJOR_IN_SYSMACROS)
#include <sys/sysmacros.h>
#endif
#if defined(HAVE_MKNOD) && defined(HAVE_SYS_MKDEV_H)
#include <sys/mkdev.h>
#endif
#endif
/* Return a dictionary corresponding to the POSIX environment table */
#ifdef WITH_NEXT_FRAMEWORK
/* On Darwin/MacOSX a shared library or framework has no access to
** environ directly, we must obtain it with _NSGetEnviron().
*/
#include <crt_externs.h>
static char **environ;
#elif !defined(_MSC_VER) && ( !defined(__WATCOMC__) || defined(__QNX__) )
extern char **environ;
#endif /* !_MSC_VER */
static PyObject *
convertenviron(void)
{
PyObject *d;
char **e;
d = PyDict_New();
if (d == NULL)
return NULL;
#ifdef WITH_NEXT_FRAMEWORK
if (environ == NULL)
environ = *_NSGetEnviron();
#endif
if (environ == NULL)
return d;
/* This part ignores errors */
for (e = environ; *e != NULL; e++) {
PyObject *k;
PyObject *v;
char *p = strchr(*e, '=');
if (p == NULL)
continue;
k = PyString_FromStringAndSize(*e, (int)(p-*e));
if (k == NULL) {
PyErr_Clear();
continue;
}
v = PyString_FromString(p+1);
if (v == NULL) {
PyErr_Clear();
Py_DECREF(k);
continue;
}
if (PyDict_GetItem(d, k) == NULL) {
if (PyDict_SetItem(d, k, v) != 0)
PyErr_Clear();
}
Py_DECREF(k);
Py_DECREF(v);
}
#if defined(PYOS_OS2)
{
APIRET rc;
char buffer[1024]; /* OS/2 Provides a Documented Max of 1024 Chars */
rc = DosQueryExtLIBPATH(buffer, BEGIN_LIBPATH);
if (rc == NO_ERROR) { /* (not a type, envname is NOT 'BEGIN_LIBPATH') */
PyObject *v = PyString_FromString(buffer);
PyDict_SetItemString(d, "BEGINLIBPATH", v);
Py_DECREF(v);
}
rc = DosQueryExtLIBPATH(buffer, END_LIBPATH);
if (rc == NO_ERROR) { /* (not a typo, envname is NOT 'END_LIBPATH') */
PyObject *v = PyString_FromString(buffer);
PyDict_SetItemString(d, "ENDLIBPATH", v);
Py_DECREF(v);
}
}
#endif
return d;
}
/* Set a POSIX-specific error from errno, and return NULL */
static PyObject *
posix_error(void)
{
return PyErr_SetFromErrno(PyExc_OSError);
}
static PyObject *
posix_error_with_filename(char* name)
{
return PyErr_SetFromErrnoWithFilename(PyExc_OSError, name);
}
#ifdef Py_WIN_WIDE_FILENAMES
static PyObject *
posix_error_with_unicode_filename(Py_UNICODE* name)
{
return PyErr_SetFromErrnoWithUnicodeFilename(PyExc_OSError, name);
}
#endif /* Py_WIN_WIDE_FILENAMES */
static PyObject *
posix_error_with_allocated_filename(char* name)
{
PyObject *rc = PyErr_SetFromErrnoWithFilename(PyExc_OSError, name);
PyMem_Free(name);
return rc;
}
#ifdef MS_WINDOWS
static PyObject *
win32_error(char* function, char* filename)
{
/* XXX We should pass the function name along in the future.
(_winreg.c also wants to pass the function name.)
This would however require an additional param to the
Windows error object, which is non-trivial.
*/
errno = GetLastError();
if (filename)
return PyErr_SetFromWindowsErrWithFilename(errno, filename);
else
return PyErr_SetFromWindowsErr(errno);
}
#ifdef Py_WIN_WIDE_FILENAMES
static PyObject *
win32_error_unicode(char* function, Py_UNICODE* filename)
{
/* XXX - see win32_error for comments on 'function' */
errno = GetLastError();
if (filename)
return PyErr_SetFromWindowsErrWithUnicodeFilename(errno, filename);
else
return PyErr_SetFromWindowsErr(errno);
}
static PyObject *_PyUnicode_FromFileSystemEncodedObject(register PyObject *obj)
{
}
/* Function suitable for O& conversion */
static int
convert_to_unicode(PyObject *arg, void* _param)
{
PyObject **param = (PyObject**)_param;
if (PyUnicode_CheckExact(arg)) {
Py_INCREF(arg);
*param = arg;
}
else if (PyUnicode_Check(arg)) {
/* For a Unicode subtype that's not a Unicode object,
return a true Unicode object with the same data. */
*param = PyUnicode_FromUnicode(PyUnicode_AS_UNICODE(arg),
PyUnicode_GET_SIZE(arg));
return *param != NULL;
}
else
*param = PyUnicode_FromEncodedObject(arg,
Py_FileSystemDefaultEncoding,
"strict");
return (*param) != NULL;
}
#endif /* Py_WIN_WIDE_FILENAMES */
#endif
#if defined(PYOS_OS2)
/**********************************************************************
* Helper Function to Trim and Format OS/2 Messages
**********************************************************************/
static void
os2_formatmsg(char *msgbuf, int msglen, char *reason)
{
msgbuf[msglen] = '\0'; /* OS/2 Doesn't Guarantee a Terminator */
if (strlen(msgbuf) > 0) { /* If Non-Empty Msg, Trim CRLF */
char *lastc = &msgbuf[ strlen(msgbuf)-1 ];
while (lastc > msgbuf && isspace(Py_CHARMASK(*lastc)))
*lastc-- = '\0'; /* Trim Trailing Whitespace (CRLF) */
}
/* Add Optional Reason Text */
if (reason) {
strcat(msgbuf, " : ");
strcat(msgbuf, reason);
}
}
/**********************************************************************
* Decode an OS/2 Operating System Error Code
*
* A convenience function to lookup an OS/2 error code and return a
* text message we can use to raise a Python exception.
*
* Notes:
* The messages for errors returned from the OS/2 kernel reside in
* the file OSO001.MSG in the \OS2 directory hierarchy.
*
**********************************************************************/
static char *
os2_strerror(char *msgbuf, int msgbuflen, int errorcode, char *reason)
{
APIRET rc;
ULONG msglen;
/* Retrieve Kernel-Related Error Message from OSO001.MSG File */
Py_BEGIN_ALLOW_THREADS
rc = DosGetMessage(NULL, 0, msgbuf, msgbuflen,
errorcode, "oso001.msg", &msglen);
Py_END_ALLOW_THREADS
if (rc == NO_ERROR)
os2_formatmsg(msgbuf, msglen, reason);
else
PyOS_snprintf(msgbuf, msgbuflen,
"unknown OS error #%d", errorcode);
return msgbuf;
}
/* Set an OS/2-specific error and return NULL. OS/2 kernel
errors are not in a global variable e.g. 'errno' nor are
they congruent with posix error numbers. */
static PyObject * os2_error(int code)
{
char text[1024];
PyObject *v;
os2_strerror(text, sizeof(text), code, "");
v = Py_BuildValue("(is)", code, text);
if (v != NULL) {
PyErr_SetObject(PyExc_OSError, v);
Py_DECREF(v);
}
return NULL; /* Signal to Python that an Exception is Pending */
}
#endif /* OS2 */
/* POSIX generic methods */
static PyObject *
posix_fildes(PyObject *fdobj, int (*func)(int))
{
int fd;
int res;
fd = PyObject_AsFileDescriptor(fdobj);
if (fd < 0)
return NULL;
Py_BEGIN_ALLOW_THREADS
res = (*func)(fd);
Py_END_ALLOW_THREADS
if (res < 0)
return posix_error();
Py_INCREF(Py_None);
return Py_None;
}
#ifdef Py_WIN_WIDE_FILENAMES
static int
unicode_file_names(void)
{
static int canusewide = -1;
if (canusewide == -1) {
/* As per doc for ::GetVersion(), this is the correct test for
the Windows NT family. */
canusewide = (GetVersion() < 0x80000000) ? 1 : 0;
}
return canusewide;
}
#endif
static PyObject *
posix_1str(PyObject *args, char *format, int (*func)(const char*))
{
char *path1 = NULL;
int res;
if (!PyArg_ParseTuple(args, format,
Py_FileSystemDefaultEncoding, &path1))
return NULL;
Py_BEGIN_ALLOW_THREADS
res = (*func)(path1);
Py_END_ALLOW_THREADS
if (res < 0)
return posix_error_with_allocated_filename(path1);
PyMem_Free(path1);
Py_INCREF(Py_None);
return Py_None;
}
static PyObject *
posix_2str(PyObject *args,
char *format,
int (*func)(const char *, const char *))
{
char *path1 = NULL, *path2 = NULL;
int res;
if (!PyArg_ParseTuple(args, format,
Py_FileSystemDefaultEncoding, &path1,
Py_FileSystemDefaultEncoding, &path2))
return NULL;
Py_BEGIN_ALLOW_THREADS
res = (*func)(path1, path2);
Py_END_ALLOW_THREADS
PyMem_Free(path1);
PyMem_Free(path2);
if (res != 0)
/* XXX how to report both path1 and path2??? */
return posix_error();
Py_INCREF(Py_None);
return Py_None;
}
#ifdef Py_WIN_WIDE_FILENAMES
static PyObject*
win32_1str(PyObject* args, char* func,
char* format, BOOL (__stdcall *funcA)(LPCSTR),
char* wformat, BOOL (__stdcall *funcW)(LPWSTR))
{
PyObject *uni;
char *ansi;
BOOL result;
if (unicode_file_names()) {
if (!PyArg_ParseTuple(args, wformat, &uni))
PyErr_Clear();
else {
Py_BEGIN_ALLOW_THREADS
result = funcW(PyUnicode_AsUnicode(uni));
Py_END_ALLOW_THREADS
if (!result)
return win32_error_unicode(func, PyUnicode_AsUnicode(uni));
Py_INCREF(Py_None);
return Py_None;
}
}
if (!PyArg_ParseTuple(args, format, &ansi))
return NULL;
Py_BEGIN_ALLOW_THREADS
result = funcA(ansi);
Py_END_ALLOW_THREADS
if (!result)
return win32_error(func, ansi);
Py_INCREF(Py_None);
return Py_None;
}
/* This is a reimplementation of the C library's chdir function,
but one that produces Win32 errors instead of DOS error codes.
chdir is essentially a wrapper around SetCurrentDirectory; however,
it also needs to set "magic" environment variables indicating
the per-drive current directory, which are of the form =<drive>: */
BOOL __stdcall
win32_chdir(LPCSTR path)
{
char new_path[MAX_PATH+1];
int result;
char env[4] = "=x:";
if(!SetCurrentDirectoryA(path))
return FALSE;
result = GetCurrentDirectoryA(MAX_PATH+1, new_path);
if (!result)
return FALSE;
/* In the ANSI API, there should not be any paths longer
than MAX_PATH. */
assert(result <= MAX_PATH+1);
if (strncmp(new_path, "\\\\", 2) == 0 ||
strncmp(new_path, "//", 2) == 0)
/* UNC path, nothing to do. */
return TRUE;
env[1] = new_path[0];
return SetEnvironmentVariableA(env, new_path);
}
/* The Unicode version differs from the ANSI version
since the current directory might exceed MAX_PATH characters */
BOOL __stdcall
win32_wchdir(LPCWSTR path)
{
wchar_t _new_path[MAX_PATH+1], *new_path = _new_path;
int result;
wchar_t env[4] = L"=x:";
if(!SetCurrentDirectoryW(path))
return FALSE;
result = GetCurrentDirectoryW(MAX_PATH+1, new_path);
if (!result)
return FALSE;
if (result > MAX_PATH+1) {
new_path = malloc(result);
if (!new_path) {
SetLastError(ERROR_OUTOFMEMORY);
return FALSE;
}
}
if (wcsncmp(new_path, L"\\\\", 2) == 0 ||
wcsncmp(new_path, L"//", 2) == 0)
/* UNC path, nothing to do. */
return TRUE;
env[1] = new_path[0];
result = SetEnvironmentVariableW(env, new_path);
if (new_path != _new_path)
free(new_path);
return result;
}
#endif
#ifdef MS_WINDOWS
/* The CRT of Windows has a number of flaws wrt. its stat() implementation:
- time stamps are restricted to second resolution
- file modification times suffer from forth-and-back conversions between
UTC and local time
Therefore, we implement our own stat, based on the Win32 API directly.
*/
#define HAVE_STAT_NSEC 1
struct win32_stat{
int st_dev;
__int64 st_ino;
unsigned short st_mode;
int st_nlink;
int st_uid;
int st_gid;
int st_rdev;
__int64 st_size;
int st_atime;
int st_atime_nsec;
int st_mtime;
int st_mtime_nsec;
int st_ctime;
int st_ctime_nsec;
};
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, int *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. */
/* XXX Win32 supports time stamps past 2038; we currently don't */
*time_out = Py_SAFE_DOWNCAST((in / 10000000) - secs_between_epochs, __int64, int);
}
static void
time_t_to_FILE_TIME(int 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;
}
static int
attribute_data_to_stat(WIN32_FILE_ATTRIBUTE_DATA *info, struct win32_stat *result)
{
memset(result, 0, sizeof(*result));
result->st_mode = attributes_to_mode(info->dwFileAttributes);
result->st_size = (((__int64)info->nFileSizeHigh)<<32) + info->nFileSizeLow;
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);
return 0;
}
/* Emulate GetFileAttributesEx[AW] on Windows 95 */
static int checked = 0;
static BOOL (CALLBACK *gfaxa)(LPCSTR, GET_FILEEX_INFO_LEVELS, LPVOID);
static BOOL (CALLBACK *gfaxw)(LPCWSTR, GET_FILEEX_INFO_LEVELS, LPVOID);
static void
check_gfax()
{
HINSTANCE hKernel32;
if (checked)
return;
checked = 1;
hKernel32 = GetModuleHandle("KERNEL32");
*(FARPROC*)&gfaxa = GetProcAddress(hKernel32, "GetFileAttributesExA");
*(FARPROC*)&gfaxw = GetProcAddress(hKernel32, "GetFileAttributesExW");
}
static BOOL WINAPI
Py_GetFileAttributesExA(LPCSTR pszFile,
GET_FILEEX_INFO_LEVELS level,
LPVOID pv)
{
BOOL result;
HANDLE hFindFile;
WIN32_FIND_DATAA FileData;
LPWIN32_FILE_ATTRIBUTE_DATA pfad = pv;
/* First try to use the system's implementation, if that is
available and either succeeds to gives an error other than
that it isn't implemented. */
check_gfax();
if (gfaxa) {
result = gfaxa(pszFile, level, pv);
if (result || GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
return result;
}
/* It's either not present, or not implemented.
Emulate using FindFirstFile. */
if (level != GetFileExInfoStandard) {
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Use GetFileAttributes to validate that the file name
does not contain wildcards (which FindFirstFile would
accept). */
if (GetFileAttributesA(pszFile) == 0xFFFFFFFF)
return FALSE;
hFindFile = FindFirstFileA(pszFile, &FileData);
if (hFindFile == INVALID_HANDLE_VALUE)
return FALSE;
FindClose(hFindFile);
pfad->dwFileAttributes = FileData.dwFileAttributes;
pfad->ftCreationTime = FileData.ftCreationTime;
pfad->ftLastAccessTime = FileData.ftLastAccessTime;
pfad->ftLastWriteTime = FileData.ftLastWriteTime;
pfad->nFileSizeHigh = FileData.nFileSizeHigh;
pfad->nFileSizeLow = FileData.nFileSizeLow;
return TRUE;
}
static BOOL WINAPI
Py_GetFileAttributesExW(LPCWSTR pszFile,
GET_FILEEX_INFO_LEVELS level,
LPVOID pv)
{
BOOL result;
HANDLE hFindFile;
WIN32_FIND_DATAW FileData;
LPWIN32_FILE_ATTRIBUTE_DATA pfad = pv;
/* First try to use the system's implementation, if that is
available and either succeeds to gives an error other than
that it isn't implemented. */
check_gfax();
if (gfaxa) {
result = gfaxw(pszFile, level, pv);
if (result || GetLastError() != ERROR_CALL_NOT_IMPLEMENTED)
return result;
}
/* It's either not present, or not implemented.
Emulate using FindFirstFile. */
if (level != GetFileExInfoStandard) {
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Use GetFileAttributes to validate that the file name
does not contain wildcards (which FindFirstFile would
accept). */
if (GetFileAttributesW(pszFile) == 0xFFFFFFFF)
return FALSE;
hFindFile = FindFirstFileW(pszFile, &FileData);
if (hFindFile == INVALID_HANDLE_VALUE)
return FALSE;
FindClose(hFindFile);
pfad->dwFileAttributes = FileData.dwFileAttributes;
pfad->ftCreationTime = FileData.ftCreationTime;
pfad->ftLastAccessTime = FileData.ftLastAccessTime;
pfad->ftLastWriteTime = FileData.ftLastWriteTime;
pfad->nFileSizeHigh = FileData.nFileSizeHigh;
pfad->nFileSizeLow = FileData.nFileSizeLow;
return TRUE;
}
static int
win32_stat(const char* path, struct win32_stat *result)
{
WIN32_FILE_ATTRIBUTE_DATA info;
int code;
char *dot;
/* XXX not supported on Win95 and NT 3.x */
if (!Py_GetFileAttributesExA(path, GetFileExInfoStandard, &info)) {
/* Protocol violation: we explicitly clear errno, instead of
setting it to a POSIX error. Callers should use GetLastError. */
errno = 0;
return -1;
}
code = attribute_data_to_stat(&info, result);
if (code != 0)
return code;
/* Set S_IFEXEC if it is an .exe, .bat, ... */
dot = strrchr(path, '.');
if (dot) {
if (stricmp(dot, ".bat") == 0 ||
stricmp(dot, ".cmd") == 0 ||
stricmp(dot, ".exe") == 0 ||
stricmp(dot, ".com") == 0)
result->st_mode |= 0111;
}
return code;
}
static int
win32_wstat(const wchar_t* path, struct win32_stat *result)
{
int code;
const wchar_t *dot;
WIN32_FILE_ATTRIBUTE_DATA info;
/* XXX not supported on Win95 and NT 3.x */
if (!Py_GetFileAttributesExW(path, GetFileExInfoStandard, &info)) {
/* Protocol violation: we explicitly clear errno, instead of
setting it to a POSIX error. Callers should use GetLastError. */
errno = 0;
return -1;
}
code = attribute_data_to_stat(&info, result);
if (code < 0)
return code;
/* Set IFEXEC if it is an .exe, .bat, ... */
dot = wcsrchr(path, '.');
if (dot) {
if (_wcsicmp(dot, L".bat") == 0 ||
_wcsicmp(dot, L".cmd") == 0 ||
_wcsicmp(dot, L".exe") == 0 ||
_wcsicmp(dot, L".com") == 0)
result->st_mode |= 0111;
}
return code;
}
static int
win32_fstat(int file_number, struct win32_stat *result)
{
BY_HANDLE_FILE_INFORMATION info;
HANDLE h;
int type;
h = (HANDLE)_get_osfhandle(file_number);
/* Protocol violation: we explicitly clear errno, instead of
setting it to a POSIX error. Callers should use GetLastError. */
errno = 0;
if (h == INVALID_HANDLE_VALUE) {