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/* Functions and macros from Python 3.2 not found in 2.x.
This file is #included by _posixsubprocess.c and the functions
are declared static to avoid exposing them outside this module. */
/* _posixsubprocess_config.h was already included by _posixsubprocess.c
* which is #include'ing us despite the .c name. HAVE_SIGNAL_H comes
* from there. Yes, confusing! */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include "unicodeobject.h"
#if (PY_VERSION_HEX < 0x02050000)
#define Py_ssize_t int
#endif
#define Py_CLEANUP_SUPPORTED 0x20000
/* 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 PyLong_FromPid PyLong_FromLong
#elif SIZEOF_PID_T == SIZEOF_LONG
#define PyLong_FromPid PyLong_FromLong
#elif defined(SIZEOF_LONG_LONG) && SIZEOF_PID_T == SIZEOF_LONG_LONG
#define PyLong_FromPid PyLong_FromLongLong
#else
#error "sizeof(pid_t) is neither sizeof(int), sizeof(long) or sizeof(long long)"
#endif /* SIZEOF_PID_T */
static PyObject *PyUnicode_EncodeFSDefault(PyObject *unicode)
{
if (Py_FileSystemDefaultEncoding)
return PyUnicode_AsEncodedString(unicode,
Py_FileSystemDefaultEncoding,
"strict");
else
return PyUnicode_EncodeUTF8(PyUnicode_AS_UNICODE(unicode),
PyUnicode_GET_SIZE(unicode),
"strict");
}
/* Convert the argument to a bytes object, according to the file
system encoding. The addr param must be a PyObject**.
This is designed to be used with "O&" in PyArg_Parse APIs. */
static int
PyUnicode_FSConverter(PyObject* arg, void* addr)
{
PyObject *output = NULL;
Py_ssize_t size;
void *data;
if (arg == NULL) {
Py_DECREF(*(PyObject**)addr);
return 1;
}
if (PyString_Check(arg)) {
output = arg;
Py_INCREF(output);
}
else {
arg = PyUnicode_FromObject(arg);
if (!arg)
return 0;
output = PyUnicode_EncodeFSDefault(arg);
Py_DECREF(arg);
if (!output)
return 0;
if (!PyString_Check(output)) {
Py_DECREF(output);
PyErr_SetString(PyExc_TypeError, "encoder failed to return bytes");
return 0;
}
}
size = PyString_GET_SIZE(output);
data = PyString_AS_STRING(output);
if (size != strlen(data)) {
PyErr_SetString(PyExc_TypeError, "embedded NUL character");
Py_DECREF(output);
return 0;
}
*(PyObject**)addr = output;
return Py_CLEANUP_SUPPORTED;
}
/* Free's a NULL terminated char** array of C strings. */
static void
_Py_FreeCharPArray(char *const array[])
{
Py_ssize_t i;
for (i = 0; array[i] != NULL; ++i) {
free(array[i]);
}
free((void*)array);
}
/*
* Flatten a sequence of bytes() objects into a C array of
* NULL terminated string pointers with a NULL char* terminating the array.
* (ie: an argv or env list)
*
* Memory allocated for the returned list is allocated using malloc() and MUST
* be freed by the caller using a free() loop or _Py_FreeCharPArray().
*/
static char *const *
_PySequence_BytesToCharpArray(PyObject* self)
{
char **array;
Py_ssize_t i, argc;
PyObject *item = NULL;
argc = PySequence_Size(self);
if (argc == -1)
return NULL;
/* Avoid 32-bit overflows to malloc() from unreasonable values. */
if (argc > 0x10000000) {
PyErr_NoMemory();
return NULL;
}
array = malloc((argc + 1) * sizeof(char *));
if (array == NULL) {
PyErr_NoMemory();
return NULL;
}
for (i = 0; i < argc; ++i) {
char *data;
item = PySequence_GetItem(self, i);
data = PyString_AsString(item);
if (data == NULL) {
/* NULL terminate before freeing. */
array[i] = NULL;
goto fail;
}
array[i] = strdup(data);
if (!array[i]) {
PyErr_NoMemory();
goto fail;
}
Py_DECREF(item);
}
array[argc] = NULL;
return array;
fail:
Py_XDECREF(item);
_Py_FreeCharPArray(array);
return NULL;
}
/* Restore signals that the interpreter has called SIG_IGN on to SIG_DFL.
*
* All of the code in this function must only use async-signal-safe functions,
* listed at `man 7 signal` or
* http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html.
*/
static void
_Py_RestoreSignals(void)
{
#ifdef SIGPIPE
PyOS_setsig(SIGPIPE, SIG_DFL);
#endif
#ifdef SIGXFZ
PyOS_setsig(SIGXFZ, SIG_DFL);
#endif
#ifdef SIGXFSZ
PyOS_setsig(SIGXFSZ, SIG_DFL);
#endif
}
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