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Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates and 

bytes strings for environment keys and values
This commit is contained in:
Victor Stinner 2010-04-23 21:41:56 +00:00
parent 534db4e19f
commit 13bb71c38f
5 changed files with 123 additions and 169 deletions
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2
Lib/os.py
View File

@ -450,6 +450,8 @@ environ = _Environ(environ, _keymap, _putenv, _unsetenv)
def getenv(key, default=None):
"""Get an environment variable, return None if it doesn't exist.
The optional second argument can specify an alternate default."""
if isinstance(key, bytes):
key = key.decode(sys.getfilesystemencoding(), "surrogateescape")
return environ.get(key, default)
__all__.append("getenv")

3
Lib/subprocess.py
View File

@ -1090,6 +1090,9 @@ class Popen(object):
fs_encoding = sys.getfilesystemencoding()
def fs_encode(s):
"""Encode s for use in the env, fs or cmdline."""
if isinstance(s, bytes):
return s
else:
return s.encode(fs_encoding, 'surrogateescape')
# We must avoid complex work that could involve

24
Lib/test/test_subprocess.py
View File

@ -782,7 +782,7 @@ class POSIXProcessTestCase(BaseTestCase):
self.assertStderrEqual(stderr, b'')
self.assertEqual(p.wait(), -signal.SIGTERM)
def test_surrogates(self):
def test_surrogates_error_message(self):
def prepare():
raise ValueError("surrogate:\uDCff")
@ -801,6 +801,28 @@ class POSIXProcessTestCase(BaseTestCase):
else:
self.fail("Expected ValueError or RuntimeError")
def test_undecodable_env(self):
for key, value in (('test', 'abc\uDCFF'), ('test\uDCFF', '42')):
value_repr = repr(value).encode("ascii")
# test str with surrogates
script = "import os; print(repr(os.getenv(%s)))" % repr(key)
stdout = subprocess.check_output(
[sys.executable, "-c", script],
env={key: value})
stdout = stdout.rstrip(b'\n\r')
self.assertEquals(stdout, value_repr)
# test bytes
key = key.encode("ascii", "surrogateescape")
value = value.encode("ascii", "surrogateescape")
script = "import os; print(repr(os.getenv(%s)))" % repr(key)
stdout = subprocess.check_output(
[sys.executable, "-c", script],
env={key: value})
stdout = stdout.rstrip(b'\n\r')
self.assertEquals(stdout, value_repr)
@unittest.skipUnless(mswindows, "Windows specific tests")
class Win32ProcessTestCase(BaseTestCase):

3
Misc/NEWS
View File

@ -333,6 +333,9 @@ C-API
Library
-------
- Issue #8391: os.execvpe() and os.getenv() supports unicode with surrogates
and bytes strings for environment keys and values
- Issue #8467: Pure Python implementation of subprocess encodes the error
message using surrogatepass error handler to support surrogates in the
message

258
Modules/posixmodule.c
View File

@ -3052,6 +3052,86 @@ posix_execv(PyObject *self, PyObject *args)
return posix_error();
}
static char**
parse_envlist(PyObject* env, Py_ssize_t *envc_ptr)
{
char **envlist;
Py_ssize_t i, pos, envc;
PyObject *keys=NULL, *vals=NULL;
PyObject *key, *val, *key2, *val2;
char *p, *k, *v;
size_t len;
i = PyMapping_Size(env);
if (i < 0)
return NULL;
envlist = PyMem_NEW(char *, i + 1);
if (envlist == NULL) {
PyErr_NoMemory();
return NULL;
}
envc = 0;
keys = PyMapping_Keys(env);
vals = PyMapping_Values(env);
if (!keys || !vals)
goto error;
if (!PyList_Check(keys) || !PyList_Check(vals)) {
PyErr_Format(PyExc_TypeError,
"env.keys() or env.values() is not a list");
goto error;
}
for (pos = 0; pos < i; pos++) {
key = PyList_GetItem(keys, pos);
val = PyList_GetItem(vals, pos);
if (!key || !val)
goto error;
if (PyUnicode_FSConverter(key, &key2) == 0)
goto error;
if (PyUnicode_FSConverter(val, &val2) == 0) {
Py_DECREF(key2);
goto error;
}
#if defined(PYOS_OS2)
/* Omit Pseudo-Env Vars that Would Confuse Programs if Passed On */
if (stricmp(k, "BEGINLIBPATH") != 0 && stricmp(k, "ENDLIBPATH") != 0) {
#endif
k = PyBytes_AsString(key2);
v = PyBytes_AsString(val2);
len = PyBytes_GET_SIZE(key2) + PyBytes_GET_SIZE(val2) + 2;
p = PyMem_NEW(char, len);
if (p == NULL) {
PyErr_NoMemory();
Py_DECREF(key2);
Py_DECREF(val2);
goto error;
}
PyOS_snprintf(p, len, "%s=%s", k, v);
envlist[envc++] = p;
Py_DECREF(key2);
Py_DECREF(val2);
#if defined(PYOS_OS2)
}
#endif
}
Py_DECREF(vals);
Py_DECREF(keys);
envlist[envc] = 0;
*envc_ptr = envc;
return envlist;
error:
Py_XDECREF(keys);
Py_XDECREF(vals);
while (--envc >= 0)
PyMem_DEL(envlist[envc]);
PyMem_DEL(envlist);
return NULL;
}
PyDoc_STRVAR(posix_execve__doc__,
"execve(path, args, env)\n\n\
@ -3069,8 +3149,7 @@ posix_execve(PyObject *self, PyObject *args)
PyObject *argv, *env;
char **argvlist;
char **envlist;
PyObject *key, *val, *keys=NULL, *vals=NULL;
Py_ssize_t i, pos, argc, envc;
Py_ssize_t i, argc, envc;
PyObject *(*getitem)(PyObject *, Py_ssize_t);
Py_ssize_t lastarg = 0;
@ -3118,63 +3197,9 @@ posix_execve(PyObject *self, PyObject *args)
lastarg = argc;
argvlist[argc] = NULL;
i = PyMapping_Size(env);
if (i < 0)
envlist = parse_envlist(env, &envc);
if (envlist == NULL)
goto fail_1;
envlist = PyMem_NEW(char *, i + 1);
if (envlist == NULL) {
PyErr_NoMemory();
goto fail_1;
}
envc = 0;
keys = PyMapping_Keys(env);
vals = PyMapping_Values(env);
if (!keys || !vals)
goto fail_2;
if (!PyList_Check(keys) || !PyList_Check(vals)) {
PyErr_SetString(PyExc_TypeError,
"execve(): env.keys() or env.values() is not a list");
goto fail_2;
}
for (pos = 0; pos < i; pos++) {
char *p, *k, *v;
size_t len;
key = PyList_GetItem(keys, pos);
val = PyList_GetItem(vals, pos);
if (!key || !val)
goto fail_2;
if (!PyArg_Parse(
key,
"s;execve() arg 3 contains a non-string key",
&k) ||
!PyArg_Parse(
val,
"s;execve() arg 3 contains a non-string value",
&v))
{
goto fail_2;
}
#if defined(PYOS_OS2)
/* Omit Pseudo-Env Vars that Would Confuse Programs if Passed On */
if (stricmp(k, "BEGINLIBPATH") != 0 && stricmp(k, "ENDLIBPATH") != 0) {
#endif
len = PyUnicode_GetSize(key) + PyUnicode_GetSize(val) + 2;
p = PyMem_NEW(char, len);
if (p == NULL) {
PyErr_NoMemory();
goto fail_2;
}
PyOS_snprintf(p, len, "%s=%s", k, v);
envlist[envc++] = p;
#if defined(PYOS_OS2)
}
#endif
}
envlist[envc] = 0;
execve(path, argvlist, envlist);
@ -3182,14 +3207,11 @@ posix_execve(PyObject *self, PyObject *args)
(void) posix_error();
fail_2:
while (--envc >= 0)
PyMem_DEL(envlist[envc]);
PyMem_DEL(envlist);
fail_1:
free_string_array(argvlist, lastarg);
Py_XDECREF(vals);
Py_XDECREF(keys);
fail_0:
Py_DECREF(opath);
return NULL;
@ -3303,8 +3325,8 @@ posix_spawnve(PyObject *self, PyObject *args)
PyObject *argv, *env;
char **argvlist;
char **envlist;
PyObject *key, *val, *keys=NULL, *vals=NULL, *res=NULL;
int mode, pos, envc;
PyObject *res = NULL;
int mode, envc;
Py_ssize_t argc, i;
Py_intptr_t spawnval;
PyObject *(*getitem)(PyObject *, Py_ssize_t);
@ -3354,55 +3376,9 @@ posix_spawnve(PyObject *self, PyObject *args)
lastarg = argc;
argvlist[argc] = NULL;
i = PyMapping_Size(env);
if (i < 0)
envlist = parse_envlist(env, &envc);
if (envlist == NULL)
goto fail_1;
envlist = PyMem_NEW(char *, i + 1);
if (envlist == NULL) {
PyErr_NoMemory();
goto fail_1;
}
envc = 0;
keys = PyMapping_Keys(env);
vals = PyMapping_Values(env);
if (!keys || !vals)
goto fail_2;
if (!PyList_Check(keys) || !PyList_Check(vals)) {
PyErr_SetString(PyExc_TypeError,
"spawnve(): env.keys() or env.values() is not a list");
goto fail_2;
}
for (pos = 0; pos < i; pos++) {
char *p, *k, *v;
size_t len;
key = PyList_GetItem(keys, pos);
val = PyList_GetItem(vals, pos);
if (!key || !val)
goto fail_2;
if (!PyArg_Parse(
key,
"s;spawnve() arg 3 contains a non-string key",
&k) ||
!PyArg_Parse(
val,
"s;spawnve() arg 3 contains a non-string value",
&v))
{
goto fail_2;
}
len = PyUnicode_GetSize(key) + PyUnicode_GetSize(val) + 2;
p = PyMem_NEW(char, len);
if (p == NULL) {
PyErr_NoMemory();
goto fail_2;
}
PyOS_snprintf(p, len, "%s=%s", k, v);
envlist[envc++] = p;
}
envlist[envc] = 0;
#if defined(PYOS_OS2) && defined(PYCC_GCC)
Py_BEGIN_ALLOW_THREADS
@ -3426,14 +3402,11 @@ posix_spawnve(PyObject *self, PyObject *args)
res = Py_BuildValue("L", (PY_LONG_LONG) spawnval);
#endif
fail_2:
while (--envc >= 0)
PyMem_DEL(envlist[envc]);
PyMem_DEL(envlist);
fail_1:
free_string_array(argvlist, lastarg);
Py_XDECREF(vals);
Py_XDECREF(keys);
fail_0:
Py_DECREF(opath);
return res;
@ -3538,8 +3511,8 @@ posix_spawnvpe(PyObject *self, PyObject *args)
PyObject *argv, *env;
char **argvlist;
char **envlist;
PyObject *key, *val, *keys=NULL, *vals=NULL, *res=NULL;
int mode, i, pos, argc, envc;
PyObject *res=NULL;
int mode, i, argc, envc;
Py_intptr_t spawnval;
PyObject *(*getitem)(PyObject *, Py_ssize_t);
int lastarg = 0;
@ -3588,55 +3561,9 @@ posix_spawnvpe(PyObject *self, PyObject *args)
lastarg = argc;
argvlist[argc] = NULL;
i = PyMapping_Size(env);
if (i < 0)
envlist = parse_envlist(env, &envc);
if (envlist == NULL)
goto fail_1;
envlist = PyMem_NEW(char *, i + 1);
if (envlist == NULL) {
PyErr_NoMemory();
goto fail_1;
}
envc = 0;
keys = PyMapping_Keys(env);
vals = PyMapping_Values(env);
if (!keys || !vals)
goto fail_2;
if (!PyList_Check(keys) || !PyList_Check(vals)) {
PyErr_SetString(PyExc_TypeError,
"spawnvpe(): env.keys() or env.values() is not a list");
goto fail_2;
}
for (pos = 0; pos < i; pos++) {
char *p, *k, *v;
size_t len;
key = PyList_GetItem(keys, pos);
val = PyList_GetItem(vals, pos);
if (!key || !val)
goto fail_2;
if (!PyArg_Parse(
key,
"s;spawnvpe() arg 3 contains a non-string key",
&k) ||
!PyArg_Parse(
val,
"s;spawnvpe() arg 3 contains a non-string value",
&v))
{
goto fail_2;
}
len = PyUnicode_GetSize(key) + PyUnicode_GetSize(val) + 2;
p = PyMem_NEW(char, len);
if (p == NULL) {
PyErr_NoMemory();
goto fail_2;
}
PyOS_snprintf(p, len, "%s=%s", k, v);
envlist[envc++] = p;
}
envlist[envc] = 0;
Py_BEGIN_ALLOW_THREADS
#if defined(PYCC_GCC)
@ -3651,14 +3578,11 @@ posix_spawnvpe(PyObject *self, PyObject *args)
else
res = Py_BuildValue("l", (long) spawnval);
fail_2:
while (--envc >= 0)
PyMem_DEL(envlist[envc]);
PyMem_DEL(envlist);
fail_1:
free_string_array(argvlist, lastarg);
Py_XDECREF(vals);
Py_XDECREF(keys);
fail_0:
Py_DECREF(opath);
return res;