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Trent Mick <trentm@activestate.com>: 

This patch fixes the posix module for large file support mainly on
Win64, although some general cleanup is done as well.

The changes are:

- abstract stat->STAT, fstat->FSTAT, and struct stat->STRUCT_STAT
This is because stat() etc. are not the correct functions to use on
Win64 (nor maybe on other platforms?, if not then it is now trivial to
select the appropriate one). On Win64 the appropriate system functions
are _stati64(), etc.

- add _pystat_fromstructstat(), it builds the return tuple for the
fstat system call. This functionality was being duplicated. As well
the construction of the tuple was modified to ensure no overflow of
the time_t elements (sizeof(time_t) > sizeof(long) on Win64).

- add overflow protection for the return values of posix_spawnv and
posix_spawnve

- use the proper 64-bit capable lseek() on Win64

- use intptr_t instead of long where appropriate from Win32/64 blocks
(sizeof(void*) > sizeof(long) on Win64)

This closes SourceForge patch #100513.
This commit is contained in:
Fred Drake 2000-06-29 21:12:41 +00:00
parent dfb4ebda24
commit 699f352fb2
1 changed files with 102 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

169
Modules/posixmodule.c
View File

@ -284,6 +284,18 @@ extern int lstat Py_PROTO((const char *, struct stat *));
#define USE_TMPNAM_R
#endif
/* choose the appropriate stat and fstat functions and return structs */
#ifdef MS_WIN64
# define STAT _stati64
# define FSTAT _fstati64
# define STRUCT_STAT struct _stati64
#else
# define STAT stat
# define FSTAT fstat
# define STRUCT_STAT struct stat
#endif
/* Return a dictionary corresponding to the POSIX environment table */
#if !defined(_MSC_VER) && ( !defined(__WATCOMC__) || defined(__QNX__) )
@ -539,14 +551,64 @@ posix_strintint(args, format, func)
return Py_None;
}
/* pack a system stat C structure into the Python stat tuple
(used by posix_stat() and posix_fstat()) */
static PyObject*
_pystat_fromstructstat(st)
STRUCT_STAT st;
{
PyObject *v = PyTuple_New(10);
if (v == NULL)
return NULL;
PyTuple_SetItem(v, 0, PyInt_FromLong((long)st.st_mode));
#ifdef HAVE_LARGEFILE_SUPPORT
PyTuple_SetItem(v, 1, PyLong_FromLongLong((LONG_LONG)st.st_ino));
#else
PyTuple_SetItem(v, 1, PyInt_FromLong((long)st.st_ino));
#endif
#if defined(HAVE_LONG_LONG) && !defined(MS_WINDOWS)
PyTuple_SetItem(v, 2, PyLong_FromLongLong((LONG_LONG)st.st_dev));
#else
PyTuple_SetItem(v, 2, PyInt_FromLong((long)st.st_dev));
#endif
PyTuple_SetItem(v, 3, PyInt_FromLong((long)st.st_nlink));
PyTuple_SetItem(v, 4, PyInt_FromLong((long)st.st_uid));
PyTuple_SetItem(v, 5, PyInt_FromLong((long)st.st_gid));
#ifdef HAVE_LARGEFILE_SUPPORT
PyTuple_SetItem(v, 6, PyLong_FromLongLong((LONG_LONG)st.st_size));
#else
PyTuple_SetItem(v, 6, PyInt_FromLong(st.st_size));
#endif
#if SIZEOF_TIME_T > SIZEOF_LONG
PyTuple_SetItem(v, 7, PyLong_FromLongLong((LONG_LONG)st.st_atime));
PyTuple_SetItem(v, 8, PyLong_FromLongLong((LONG_LONG)st.st_mtime));
PyTuple_SetItem(v, 9, PyLong_FromLongLong((LONG_LONG)st.st_ctime));
#else
PyTuple_SetItem(v, 7, PyInt_FromLong((long)st.st_atime));
PyTuple_SetItem(v, 8, PyInt_FromLong((long)st.st_mtime));
PyTuple_SetItem(v, 9, PyInt_FromLong((long)st.st_ctime));
#endif
if (PyErr_Occurred()) {
Py_DECREF(v);
return NULL;
}
return v;
}
static PyObject *
posix_do_stat(self, args, format, statfunc)
PyObject *self;
PyObject *args;
char *format;
int (*statfunc) Py_FPROTO((const char *, struct stat *));
int (*statfunc) Py_FPROTO((const char *, STRUCT_STAT *));
{
struct stat st;
STRUCT_STAT st;
char *path;
int res;
@ -585,31 +647,8 @@ posix_do_stat(self, args, format, statfunc)
Py_END_ALLOW_THREADS
if (res != 0)
return posix_error_with_filename(path);
#if !defined(HAVE_LARGEFILE_SUPPORT)
return Py_BuildValue("(llllllllll)",
(long)st.st_mode,
(long)st.st_ino,
(long)st.st_dev,
(long)st.st_nlink,
(long)st.st_uid,
(long)st.st_gid,
(long)st.st_size,
(long)st.st_atime,
(long)st.st_mtime,
(long)st.st_ctime);
#else
return Py_BuildValue("(lLllllLlll)",
(long)st.st_mode,
(LONG_LONG)st.st_ino,
(long)st.st_dev,
(long)st.st_nlink,
(long)st.st_uid,
(long)st.st_gid,
(LONG_LONG)st.st_size,
(long)st.st_atime,
(long)st.st_mtime,
(long)st.st_ctime);
#endif
return _pystat_fromstructstat(st);
}
@ -1158,7 +1197,7 @@ posix_stat(self, args)
PyObject *self;
PyObject *args;
{
return posix_do_stat(self, args, "s:stat", stat);
return posix_do_stat(self, args, "s:stat", STAT);
}
@ -1546,6 +1585,7 @@ posix_spawnv(self, args)
PyObject *argv;
char **argvlist;
int mode, i, argc;
intptr_t spawnval;
PyObject *(*getitem) Py_PROTO((PyObject *, int));
/* spawnv has three arguments: (mode, path, argv), where
@ -1581,14 +1621,18 @@ posix_spawnv(self, args)
if (mode == _OLD_P_OVERLAY)
mode = _P_OVERLAY;
i = _spawnv(mode, path, argvlist);
spawnval = _spawnv(mode, path, argvlist);
PyMem_DEL(argvlist);
if (i == -1)
if (spawnval == -1)
return posix_error();
else
return Py_BuildValue("i", i);
#if SIZEOF_LONG == SIZE_VOID_P
return Py_BuildValue("l", spawnval);
#else
return Py_BuildValue("L", spawnval);
#endif
}
@ -1612,6 +1656,7 @@ posix_spawnve(self, args)
char **envlist;
PyObject *key, *val, *keys=NULL, *vals=NULL, *res=NULL;
int mode, i, pos, argc, envc;
intptr_t spawnval;
PyObject *(*getitem) Py_PROTO((PyObject *, int));
/* spawnve has four arguments: (mode, path, argv, env), where
@ -1689,11 +1734,15 @@ posix_spawnve(self, args)
if (mode == _OLD_P_OVERLAY)
mode = _P_OVERLAY;
i = _spawnve(mode, path, argvlist, envlist);
if (i == -1)
spawnval = _spawnve(mode, path, argvlist, envlist);
if (spawnval == -1)
(void) posix_error();
else
res = Py_BuildValue("i", i);
#if SIZEOF_LONG == SIZE_VOID_P
res = Py_BuildValue("l", spawnval);
#else
res = Py_BuildValue("L", spawnval);
#endif
fail_2:
while (--envc >= 0)
@ -2328,7 +2377,7 @@ posix_lstat(self, args)
#ifdef HAVE_LSTAT
return posix_do_stat(self, args, "s:lstat", lstat);
#else /* !HAVE_LSTAT */
return posix_do_stat(self, args, "s:lstat", stat);
return posix_do_stat(self, args, "s:lstat", STAT);
#endif /* !HAVE_LSTAT */
}
@ -2652,7 +2701,11 @@ posix_lseek(self, args)
PyObject *args;
{
int fd, how;
#ifdef MS_WIN64
LONG_LONG pos, res;
#else
off_t pos, res;
#endif
PyObject *posobj;
if (!PyArg_ParseTuple(args, "iOi:lseek", &fd, &posobj, &how))
return NULL;
@ -2675,7 +2728,11 @@ posix_lseek(self, args)
return NULL;
Py_BEGIN_ALLOW_THREADS
#ifdef MS_WIN64
res = _lseeki64(fd, pos, how);
#else
res = lseek(fd, pos, how);
#endif
Py_END_ALLOW_THREADS
if (res < 0)
return posix_error();
@ -2749,40 +2806,17 @@ posix_fstat(self, args)
PyObject *args;
{
int fd;
struct stat st;
STRUCT_STAT st;
int res;
if (!PyArg_ParseTuple(args, "i:fstat", &fd))
return NULL;
Py_BEGIN_ALLOW_THREADS
res = fstat(fd, &st);
res = FSTAT(fd, &st);
Py_END_ALLOW_THREADS
if (res != 0)
return posix_error();
#if !defined(HAVE_LARGEFILE_SUPPORT)
return Py_BuildValue("(llllllllll)",
(long)st.st_mode,
(long)st.st_ino,
(long)st.st_dev,
(long)st.st_nlink,
(long)st.st_uid,
(long)st.st_gid,
(long)st.st_size,
(long)st.st_atime,
(long)st.st_mtime,
(long)st.st_ctime);
#else
return Py_BuildValue("(lLllllLlll)",
(long)st.st_mode,
(LONG_LONG)st.st_ino,
(long)st.st_dev,
(long)st.st_nlink,
(long)st.st_uid,
(long)st.st_gid,
(LONG_LONG)st.st_size,
(long)st.st_atime,
(long)st.st_mtime,
(long)st.st_ctime);
#endif
return _pystat_fromstructstat(st);
}
@ -2863,8 +2897,8 @@ posix_pipe(self, args)
Py_END_ALLOW_THREADS
if (!ok)
return posix_error();
read_fd = _open_osfhandle((long)read, 0);
write_fd = _open_osfhandle((long)write, 1);
read_fd = _open_osfhandle((intptr_t)read, 0);
write_fd = _open_osfhandle((intptr_t)write, 1);
return Py_BuildValue("(ii)", read_fd, write_fd);
#endif /* MS_WIN32 */
#endif
@ -3526,9 +3560,10 @@ conv_confname(arg, valuep, table, tablesize)
}
if (PyString_Check(arg)) {
/* look up the value in the table using a binary search */
int lo = 0;
int hi = tablesize;
int cmp, mid;
size_t lo = 0;
size_t mid;
size_t hi = tablesize;
int cmp;
char *confname = PyString_AS_STRING(arg);
while (lo < hi) {
mid = (lo + hi) / 2;