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Copy pathposixmodule.c
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9553 lines (8583 loc) · 263 KB
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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. */
#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"
#ifndef MS_WINDOWS
#include "posixmodule.h"
#endif
#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
/*#ifdef HAVE_FCHMOD
extern int fchmod(int, mode_t);
#endif*/
/*#ifdef HAVE_LCHMOD
extern int lchmod(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"
#include <malloc.h>
#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 */
/* Issue #1983: pid_t can be longer than a C long on some systems */
#if !defined(SIZEOF_PID_T) || SIZEOF_PID_T == SIZEOF_INT
#define PARSE_PID "i"
#define PyLong_FromPid PyInt_FromLong
#define PyLong_AsPid PyInt_AsLong
#elif SIZEOF_PID_T == SIZEOF_LONG
#define PARSE_PID "l"
#define PyLong_FromPid PyInt_FromLong
#define PyLong_AsPid PyInt_AsLong
#elif defined(SIZEOF_LONG_LONG) && SIZEOF_PID_T == SIZEOF_LONG_LONG
#define PARSE_PID "L"
#define PyLong_FromPid PyLong_FromLongLong
#define PyLong_AsPid PyInt_AsLongLong
#else
#error "sizeof(pid_t) is neither sizeof(int), sizeof(long) or sizeof(long long)"
#endif /* SIZEOF_PID_T */
/* 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
#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
#ifndef MS_WINDOWS
PyObject *
_PyInt_FromUid(uid_t uid)
{
if (uid <= LONG_MAX)
return PyInt_FromLong(uid);
return PyLong_FromUnsignedLong(uid);
}
PyObject *
_PyInt_FromGid(gid_t gid)
{
if (gid <= LONG_MAX)
return PyInt_FromLong(gid);
return PyLong_FromUnsignedLong(gid);
}
int
_Py_Uid_Converter(PyObject *obj, void *p)
{
int overflow;
long result;
if (PyFloat_Check(obj)) {
PyErr_SetString(PyExc_TypeError,
"integer argument expected, got float");
return 0;
}
result = PyLong_AsLongAndOverflow(obj, &overflow);
if (overflow < 0)
goto OverflowDown;
if (!overflow && result == -1) {
/* error or -1 */
if (PyErr_Occurred())
return 0;
*(uid_t *)p = (uid_t)-1;
}
else {
/* unsigned uid_t */
unsigned long uresult;
if (overflow > 0) {
uresult = PyLong_AsUnsignedLong(obj);
if (PyErr_Occurred()) {
if (PyErr_ExceptionMatches(PyExc_OverflowError))
goto OverflowUp;
return 0;
}
} else {
if (result < 0)
goto OverflowDown;
uresult = result;
}
if (sizeof(uid_t) < sizeof(long) &&
(unsigned long)(uid_t)uresult != uresult)
goto OverflowUp;
*(uid_t *)p = (uid_t)uresult;
}
return 1;
OverflowDown:
PyErr_SetString(PyExc_OverflowError,
"user id is less than minimum");
return 0;
OverflowUp:
PyErr_SetString(PyExc_OverflowError,
"user id is greater than maximum");
return 0;
}
int
_Py_Gid_Converter(PyObject *obj, void *p)
{
int overflow;
long result;
if (PyFloat_Check(obj)) {
PyErr_SetString(PyExc_TypeError,
"integer argument expected, got float");
return 0;
}
result = PyLong_AsLongAndOverflow(obj, &overflow);
if (overflow < 0)
goto OverflowDown;
if (!overflow && result == -1) {
/* error or -1 */
if (PyErr_Occurred())
return 0;
*(gid_t *)p = (gid_t)-1;
}
else {
/* unsigned gid_t */
unsigned long uresult;
if (overflow > 0) {
uresult = PyLong_AsUnsignedLong(obj);
if (PyErr_Occurred()) {
if (PyErr_ExceptionMatches(PyExc_OverflowError))
goto OverflowUp;
return 0;
}
} else {
if (result < 0)
goto OverflowDown;
uresult = result;
}
if (sizeof(gid_t) < sizeof(long) &&
(unsigned long)(gid_t)uresult != uresult)
goto OverflowUp;
*(gid_t *)p = (gid_t)uresult;
}
return 1;
OverflowDown:
PyErr_SetString(PyExc_OverflowError,
"group id is less than minimum");
return 0;
OverflowUp:
PyErr_SetString(PyExc_OverflowError,
"group id is greater than maximum");
return 0;
}
#endif /* MS_WINDOWS */
#if defined(HAVE_MKNOD) && defined(HAVE_MAKEDEV)
static int
_Py_Dev_Converter(PyObject *obj, void *p)
{
PyObject *index = PyNumber_Index(obj);
if (index == NULL)
return 0;
if (PyInt_Check(index)) {
long x = PyInt_AS_LONG(index);
Py_DECREF(index);
if (x == -1 && PyErr_Occurred())
return 0;
if (x < 0) {
PyErr_SetString(PyExc_OverflowError,
"can't convert negative number to unsigned long");
return 0;
}
*((dev_t *)p) = (unsigned long)x;
}
else if (PyLong_Check(index)) {
#ifdef HAVE_LONG_LONG
*((dev_t *)p) = PyLong_AsUnsignedLongLong(index);
#else
*((dev_t *)p) = PyLong_AsUnsignedLong(index);
#endif
Py_DECREF(index);
if (PyErr_Occurred())
return 0;
}
else {
Py_DECREF(index);
PyErr_Format(PyExc_TypeError,
"expected int/long, %s found",
Py_TYPE(obj)->tp_name);
return 0;
}
return 1;
}
#endif
#ifdef HAVE_LONG_LONG
static PyObject *
_PyInt_FromDev(PY_LONG_LONG v)
{
if (LONG_MIN <= v && v <= LONG_MAX)
return PyInt_FromLong((long)v);
else
return PyLong_FromLongLong(v);
}
#else
# define _PyInt_FromDev PyInt_FromLong
#endif
#if defined _MSC_VER && _MSC_VER >= 1400
/* Microsoft CRT in VS2005 and higher will verify that a filehandle is
* valid and raise an assertion if it isn't.
* Normally, an invalid fd is likely to be a C program error and therefore
* an assertion can be useful, but it does contradict the POSIX standard
* which for write(2) states:
* "Otherwise, -1 shall be returned and errno set to indicate the error."
* "[EBADF] The fildes argument is not a valid file descriptor open for
* writing."
* Furthermore, python allows the user to enter any old integer
* as a fd and should merely raise a python exception on error.
* The Microsoft CRT doesn't provide an official way to check for the
* validity of a file descriptor, but we can emulate its internal behaviour
* by using the exported __pinfo data member and knowledge of the
* internal structures involved.
* The structures below must be updated for each version of visual studio
* according to the file internal.h in the CRT source, until MS comes
* up with a less hacky way to do this.
* (all of this is to avoid globally modifying the CRT behaviour using
* _set_invalid_parameter_handler() and _CrtSetReportMode())
*/
/* The actual size of the structure is determined at runtime.
* Only the first items must be present.
*/
typedef struct {
intptr_t osfhnd;
char osfile;
} my_ioinfo;
extern __declspec(dllimport) char * __pioinfo[];
#define IOINFO_L2E 5
#define IOINFO_ARRAY_ELTS (1 << IOINFO_L2E)
#define IOINFO_ARRAYS 64
#define _NHANDLE_ (IOINFO_ARRAYS * IOINFO_ARRAY_ELTS)
#define FOPEN 0x01
#define _NO_CONSOLE_FILENO (intptr_t)-2
/* This function emulates what the windows CRT does to validate file handles */
int
_PyVerify_fd(int fd)
{
const int i1 = fd >> IOINFO_L2E;
const int i2 = fd & ((1 << IOINFO_L2E) - 1);
static int sizeof_ioinfo = 0;
/* Determine the actual size of the ioinfo structure,
* as used by the CRT loaded in memory
*/
if (sizeof_ioinfo == 0 && __pioinfo[0] != NULL) {
sizeof_ioinfo = _msize(__pioinfo[0]) / IOINFO_ARRAY_ELTS;
}
if (sizeof_ioinfo == 0) {
/* This should not happen... */
goto fail;
}
/* See that it isn't a special CLEAR fileno */
if (fd != _NO_CONSOLE_FILENO) {
/* Microsoft CRT would check that 0<=fd<_nhandle but we can't do that. Instead
* we check pointer validity and other info
*/
if (0 <= i1 && i1 < IOINFO_ARRAYS && __pioinfo[i1] != NULL) {
/* finally, check that the file is open */
my_ioinfo* info = (my_ioinfo*)(__pioinfo[i1] + i2 * sizeof_ioinfo);
if (info->osfile & FOPEN) {
return 1;
}
}
}
fail:
errno = EBADF;
return 0;
}
/* the special case of checking dup2. The target fd must be in a sensible range */
static int
_PyVerify_fd_dup2(int fd1, int fd2)
{
if (!_PyVerify_fd(fd1))
return 0;
if (fd2 == _NO_CONSOLE_FILENO)
return 0;
if ((unsigned)fd2 < _NHANDLE_)
return 1;
else
return 0;
}
#else
/* dummy version. _PyVerify_fd() is already defined in fileobject.h */
#define _PyVerify_fd_dup2(A, B) (1)
#endif
/* Return a dictionary corresponding to the POSIX environment table */
#if defined(WITH_NEXT_FRAMEWORK) || (defined(__APPLE__) && defined(Py_ENABLE_SHARED))
/* On Darwin/MacOSX a shared library or framework has no access to
** environ directly, we must obtain it with _NSGetEnviron(). See also
** man environ(7).
*/
#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;
#if defined(PYOS_OS2)
APIRET rc;
char buffer[1024]; /* OS/2 Provides a Documented Max of 1024 Chars */
#endif
d = PyDict_New();
if (d == NULL)
return NULL;
#if defined(WITH_NEXT_FRAMEWORK) || (defined(__APPLE__) && defined(Py_ENABLE_SHARED))
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)
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 MS_WINDOWS
static PyObject *
posix_error_with_unicode_filename(Py_UNICODE* name)
{
return PyErr_SetFromErrnoWithUnicodeFilename(PyExc_OSError, name);
}
#endif /* MS_WINDOWS */
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);
}
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 int
convert_to_unicode(PyObject **param)
{
if (PyUnicode_CheckExact(*param))
Py_INCREF(*param);
else if (PyUnicode_Check(*param))
/* 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(*param),
PyUnicode_GET_SIZE(*param));
else
*param = PyUnicode_FromEncodedObject(*param,
Py_FileSystemDefaultEncoding,
"strict");
return (*param) != NULL;
}
#endif /* MS_WINDOWS */
#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;
if (!_PyVerify_fd(fd))
return posix_error();
Py_BEGIN_ALLOW_THREADS
res = (*func)(fd);
Py_END_ALLOW_THREADS
if (res < 0)
return posix_error();
Py_INCREF(Py_None);
return Py_None;
}
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 MS_WINDOWS
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 (!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>: */
static 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 */
static 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 * sizeof(wchar_t));
if (!new_path) {
SetLastError(ERROR_OUTOFMEMORY);
return FALSE;
}
result = GetCurrentDirectoryW(result, new_path);
if (!result) {
free(new_path);
return FALSE;
}
}
if (wcsncmp(new_path, L"\\\\", 2) == 0 ||