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833 lines (757 loc) · 26 KB
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/* fcntl module */
// Need limited C API version 3.14 for PyLong_AsNativeBytes() in AC code
#include "pyconfig.h" // Py_GIL_DISABLED
#ifndef Py_GIL_DISABLED
# define Py_LIMITED_API 0x030e0000
#endif
#include "Python.h"
#include <errno.h> // EINTR
#include <fcntl.h> // fcntl()
#include <string.h> // memcpy()
#include <sys/ioctl.h> // ioctl()
#ifdef HAVE_SYS_FILE_H
# include <sys/file.h> // flock()
#endif
#ifdef HAVE_LINUX_FS_H
# include <linux/fs.h>
#endif
#ifdef HAVE_STROPTS_H
# include <stropts.h> // I_FLUSHBAND
#endif
#define GUARDSZ 8
// NUL followed by random bytes.
static const char guard[GUARDSZ] _Py_NONSTRING = "\x00\xfa\x69\xc4\x67\xa3\x6c\x58";
/*[clinic input]
module fcntl
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=124b58387c158179]*/
#include "clinic/fcntlmodule.c.h"
/*[clinic input]
fcntl.fcntl
fd: fildes
cmd as code: int
arg: object(c_default='NULL') = 0
/
Perform the operation `cmd` on file descriptor fd.
The values used for `cmd` are operating system dependent, and are available
as constants in the fcntl module, using the same names as used in
the relevant C header files. The argument arg is optional, and
defaults to 0; it may be an int or a string. If arg is given as a string,
the return value of fcntl is a string of that length, containing the
resulting value put in the arg buffer by the operating system. The length
of the arg string is not allowed to exceed 1024 bytes. If the arg given
is an integer or if none is specified, the result value is an integer
corresponding to the return value of the fcntl call in the C code.
[clinic start generated code]*/
static PyObject *
fcntl_fcntl_impl(PyObject *module, int fd, int code, PyObject *arg)
/*[clinic end generated code: output=888fc93b51c295bd input=7955340198e5f334]*/
{
int ret;
int async_err = 0;
if (PySys_Audit("fcntl.fcntl", "iiO", fd, code, arg ? arg : Py_None) < 0) {
return NULL;
}
if (arg == NULL || PyIndex_Check(arg)) {
unsigned int int_arg = 0;
if (arg != NULL) {
if (!PyArg_Parse(arg, "I", &int_arg)) {
return NULL;
}
}
do {
Py_BEGIN_ALLOW_THREADS
ret = fcntl(fd, code, (int)int_arg);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
return !async_err ? PyErr_SetFromErrno(PyExc_OSError) : NULL;
}
return PyLong_FromLong(ret);
}
if (PyUnicode_Check(arg) || PyObject_CheckBuffer(arg)) {
Py_buffer view;
#define FCNTL_BUFSZ 1024
/* argument plus NUL byte plus guard to detect a buffer overflow */
char buf[FCNTL_BUFSZ+GUARDSZ];
if (!PyArg_Parse(arg, "s*", &view)) {
return NULL;
}
Py_ssize_t len = view.len;
if (len <= FCNTL_BUFSZ) {
memcpy(buf, view.buf, len);
memcpy(buf + len, guard, GUARDSZ);
PyBuffer_Release(&view);
do {
Py_BEGIN_ALLOW_THREADS
ret = fcntl(fd, code, buf);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
return !async_err ? PyErr_SetFromErrno(PyExc_OSError) : NULL;
}
if (memcmp(buf + len, guard, GUARDSZ) != 0) {
PyErr_SetString(PyExc_SystemError, "buffer overflow");
return NULL;
}
return PyBytes_FromStringAndSize(buf, len);
}
else {
PyObject *result = PyBytes_FromStringAndSize(NULL, len);
if (result == NULL) {
PyBuffer_Release(&view);
return NULL;
}
char *ptr = PyBytes_AsString(result);
memcpy(ptr, view.buf, len);
PyBuffer_Release(&view);
do {
Py_BEGIN_ALLOW_THREADS
ret = fcntl(fd, code, ptr);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
if (!async_err) {
PyErr_SetFromErrno(PyExc_OSError);
}
Py_DECREF(result);
return NULL;
}
if (ptr[len] != '\0') {
PyErr_SetString(PyExc_SystemError, "buffer overflow");
Py_DECREF(result);
return NULL;
}
return result;
}
#undef FCNTL_BUFSZ
}
PyErr_Format(PyExc_TypeError,
"fcntl() argument 3 must be an integer, "
"a bytes-like object, or a string, not %T",
arg);
return NULL;
}
/*[clinic input]
fcntl.ioctl
fd: fildes
request as code: unsigned_long(bitwise=True)
arg: object(c_default='NULL') = 0
mutate_flag as mutate_arg: bool = True
/
Perform the operation `request` on file descriptor `fd`.
The values used for `request` are operating system dependent, and are available
as constants in the fcntl or termios library modules, using the same names as
used in the relevant C header files.
The argument `arg` is optional, and defaults to 0; it may be an int or a
buffer containing character data (most likely a string or an array).
If the argument is a mutable buffer (such as an array) and if the
mutate_flag argument (which is only allowed in this case) is true then the
buffer is (in effect) passed to the operating system and changes made by
the OS will be reflected in the contents of the buffer after the call has
returned. The return value is the integer returned by the ioctl system
call.
If the argument is a mutable buffer and the mutable_flag argument is false,
the behavior is as if a string had been passed.
If the argument is an immutable buffer (most likely a string) then a copy
of the buffer is passed to the operating system and the return value is a
string of the same length containing whatever the operating system put in
the buffer. The length of the arg buffer in this case is not allowed to
exceed 1024 bytes.
If the arg given is an integer or if none is specified, the result value is
an integer corresponding to the return value of the ioctl call in the C
code.
[clinic start generated code]*/
static PyObject *
fcntl_ioctl_impl(PyObject *module, int fd, unsigned long code, PyObject *arg,
int mutate_arg)
/*[clinic end generated code: output=f72baba2454d7a62 input=9c6cca5e2c339622]*/
{
/* We use the unsigned non-checked 'I' format for the 'code' parameter
because the system expects it to be a 32bit bit field value
regardless of it being passed as an int or unsigned long on
various platforms. See the termios.TIOCSWINSZ constant across
platforms for an example of this.
If any of the 64bit platforms ever decide to use more than 32bits
in their unsigned long ioctl codes this will break and need
special casing based on the platform being built on.
*/
int ret;
int async_err = 0;
if (PySys_Audit("fcntl.ioctl", "ikO", fd, code, arg ? arg : Py_None) < 0) {
return NULL;
}
if (arg == NULL || PyIndex_Check(arg)) {
int int_arg = 0;
if (arg != NULL) {
if (!PyArg_Parse(arg, "i", &int_arg)) {
return NULL;
}
}
do {
Py_BEGIN_ALLOW_THREADS
ret = ioctl(fd, code, int_arg);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
return !async_err ? PyErr_SetFromErrno(PyExc_OSError) : NULL;
}
return PyLong_FromLong(ret);
}
if (PyUnicode_Check(arg) || PyObject_CheckBuffer(arg)) {
Py_buffer view;
#define IOCTL_BUFSZ 1024
/* argument plus NUL byte plus guard to detect a buffer overflow */
char buf[IOCTL_BUFSZ+GUARDSZ];
if (mutate_arg && !PyBytes_Check(arg) && !PyUnicode_Check(arg)) {
if (PyObject_GetBuffer(arg, &view, PyBUF_WRITABLE) == 0) {
Py_ssize_t len = view.len;
void *ptr = view.buf;
if (len <= IOCTL_BUFSZ) {
memcpy(buf, ptr, len);
memcpy(buf + len, guard, GUARDSZ);
ptr = buf;
}
do {
Py_BEGIN_ALLOW_THREADS
ret = ioctl(fd, code, ptr);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
if (!async_err) {
PyErr_SetFromErrno(PyExc_OSError);
}
PyBuffer_Release(&view);
return NULL;
}
if (ptr == buf) {
memcpy(view.buf, buf, len);
}
PyBuffer_Release(&view);
if (ptr == buf && memcmp(buf + len, guard, GUARDSZ) != 0) {
PyErr_SetString(PyExc_SystemError, "buffer overflow");
return NULL;
}
return PyLong_FromLong(ret);
}
if (!PyErr_ExceptionMatches(PyExc_BufferError)) {
return NULL;
}
PyErr_Clear();
}
if (!PyArg_Parse(arg, "s*", &view)) {
return NULL;
}
Py_ssize_t len = view.len;
if (len <= IOCTL_BUFSZ) {
memcpy(buf, view.buf, len);
memcpy(buf + len, guard, GUARDSZ);
PyBuffer_Release(&view);
do {
Py_BEGIN_ALLOW_THREADS
ret = ioctl(fd, code, buf);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
return !async_err ? PyErr_SetFromErrno(PyExc_OSError) : NULL;
}
if (memcmp(buf + len, guard, GUARDSZ) != 0) {
PyErr_SetString(PyExc_SystemError, "buffer overflow");
return NULL;
}
return PyBytes_FromStringAndSize(buf, len);
}
else {
PyObject *result = PyBytes_FromStringAndSize(NULL, len);
if (result == NULL) {
PyBuffer_Release(&view);
return NULL;
}
char *ptr = PyBytes_AsString(result);
memcpy(ptr, view.buf, len);
PyBuffer_Release(&view);
do {
Py_BEGIN_ALLOW_THREADS
ret = ioctl(fd, code, ptr);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
if (ret < 0) {
if (!async_err) {
PyErr_SetFromErrno(PyExc_OSError);
}
Py_DECREF(result);
return NULL;
}
if (ptr[len] != '\0') {
PyErr_SetString(PyExc_SystemError, "buffer overflow");
Py_DECREF(result);
return NULL;
}
return result;
}
#undef IOCTL_BUFSZ
}
PyErr_Format(PyExc_TypeError,
"ioctl() argument 3 must be an integer, "
"a bytes-like object, or a string, not %T",
arg);
return NULL;
}
/*[clinic input]
fcntl.flock
fd: fildes
operation as code: int
/
Perform the lock operation `operation` on file descriptor `fd`.
See the Unix manual page for flock(2) for details (On some systems, this
function is emulated using fcntl()).
[clinic start generated code]*/
static PyObject *
fcntl_flock_impl(PyObject *module, int fd, int code)
/*[clinic end generated code: output=84059e2b37d2fc64 input=0bfc00f795953452]*/
{
int ret;
int async_err = 0;
if (PySys_Audit("fcntl.flock", "ii", fd, code) < 0) {
return NULL;
}
#ifdef HAVE_FLOCK
do {
Py_BEGIN_ALLOW_THREADS
ret = flock(fd, code);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
#else
#ifndef LOCK_SH
#define LOCK_SH 1 /* shared lock */
#define LOCK_EX 2 /* exclusive lock */
#define LOCK_NB 4 /* don't block when locking */
#define LOCK_UN 8 /* unlock */
#endif
{
struct flock l;
if (code == LOCK_UN)
l.l_type = F_UNLCK;
else if (code & LOCK_SH)
l.l_type = F_RDLCK;
else if (code & LOCK_EX)
l.l_type = F_WRLCK;
else {
PyErr_SetString(PyExc_ValueError,
"unrecognized flock argument");
return NULL;
}
l.l_whence = l.l_start = l.l_len = 0;
do {
Py_BEGIN_ALLOW_THREADS
ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
}
#endif /* HAVE_FLOCK */
if (ret < 0) {
return !async_err ? PyErr_SetFromErrno(PyExc_OSError) : NULL;
}
Py_RETURN_NONE;
}
/*[clinic input]
fcntl.lockf
fd: fildes
cmd as code: int
len as lenobj: object(c_default='NULL') = 0
start as startobj: object(c_default='NULL') = 0
whence: int = 0
/
A wrapper around the fcntl() locking calls.
`fd` is the file descriptor of the file to lock or unlock, and operation is one
of the following values:
LOCK_UN - unlock
LOCK_SH - acquire a shared lock
LOCK_EX - acquire an exclusive lock
When operation is LOCK_SH or LOCK_EX, it can also be bitwise ORed with
LOCK_NB to avoid blocking on lock acquisition. If LOCK_NB is used and the
lock cannot be acquired, an OSError will be raised and the exception will
have an errno attribute set to EACCES or EAGAIN (depending on the operating
system -- for portability, check for either value).
`len` is the number of bytes to lock, with the default meaning to lock to
EOF. `start` is the byte offset, relative to `whence`, to that the lock
starts. `whence` is as with fileobj.seek(), specifically:
0 - relative to the start of the file (SEEK_SET)
1 - relative to the current buffer position (SEEK_CUR)
2 - relative to the end of the file (SEEK_END)
[clinic start generated code]*/
static PyObject *
fcntl_lockf_impl(PyObject *module, int fd, int code, PyObject *lenobj,
PyObject *startobj, int whence)
/*[clinic end generated code: output=4985e7a172e7461a input=5480479fc63a04b8]*/
{
int ret;
int async_err = 0;
if (PySys_Audit("fcntl.lockf", "iiOOi", fd, code, lenobj ? lenobj : Py_None,
startobj ? startobj : Py_None, whence) < 0) {
return NULL;
}
#ifndef LOCK_SH
#define LOCK_SH 1 /* shared lock */
#define LOCK_EX 2 /* exclusive lock */
#define LOCK_NB 4 /* don't block when locking */
#define LOCK_UN 8 /* unlock */
#endif /* LOCK_SH */
{
struct flock l;
if (code == LOCK_UN)
l.l_type = F_UNLCK;
else if (code & LOCK_SH)
l.l_type = F_RDLCK;
else if (code & LOCK_EX)
l.l_type = F_WRLCK;
else {
PyErr_SetString(PyExc_ValueError,
"unrecognized lockf argument");
return NULL;
}
l.l_start = l.l_len = 0;
if (startobj != NULL) {
#if !defined(HAVE_LARGEFILE_SUPPORT)
l.l_start = PyLong_AsLong(startobj);
#else
l.l_start = PyLong_Check(startobj) ?
PyLong_AsLongLong(startobj) :
PyLong_AsLong(startobj);
#endif
if (PyErr_Occurred())
return NULL;
}
if (lenobj != NULL) {
#if !defined(HAVE_LARGEFILE_SUPPORT)
l.l_len = PyLong_AsLong(lenobj);
#else
l.l_len = PyLong_Check(lenobj) ?
PyLong_AsLongLong(lenobj) :
PyLong_AsLong(lenobj);
#endif
if (PyErr_Occurred())
return NULL;
}
l.l_whence = whence;
do {
Py_BEGIN_ALLOW_THREADS
ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l);
Py_END_ALLOW_THREADS
} while (ret == -1 && errno == EINTR && !(async_err = PyErr_CheckSignals()));
}
if (ret < 0) {
return !async_err ? PyErr_SetFromErrno(PyExc_OSError) : NULL;
}
Py_RETURN_NONE;
}
/* List of functions */
static PyMethodDef fcntl_methods[] = {
FCNTL_FCNTL_METHODDEF
FCNTL_IOCTL_METHODDEF
FCNTL_FLOCK_METHODDEF
FCNTL_LOCKF_METHODDEF
{NULL, NULL} /* sentinel */
};
PyDoc_STRVAR(module_doc,
"This module performs file control and I/O control on file\n\
descriptors. It is an interface to the fcntl() and ioctl() Unix\n\
routines. File descriptors can be obtained with the fileno() method of\n\
a file or socket object.");
/* Module initialisation */
static int
all_ins(PyObject* m)
{
if (PyModule_AddIntMacro(m, LOCK_SH)) return -1;
if (PyModule_AddIntMacro(m, LOCK_EX)) return -1;
if (PyModule_AddIntMacro(m, LOCK_NB)) return -1;
if (PyModule_AddIntMacro(m, LOCK_UN)) return -1;
/* GNU extensions, as of glibc 2.2.4 */
#ifdef LOCK_MAND
if (PyModule_AddIntMacro(m, LOCK_MAND)) return -1;
#endif
#ifdef LOCK_READ
if (PyModule_AddIntMacro(m, LOCK_READ)) return -1;
#endif
#ifdef LOCK_WRITE
if (PyModule_AddIntMacro(m, LOCK_WRITE)) return -1;
#endif
#ifdef LOCK_RW
if (PyModule_AddIntMacro(m, LOCK_RW)) return -1;
#endif
#ifdef F_DUPFD
if (PyModule_AddIntMacro(m, F_DUPFD)) return -1;
#endif
#ifdef F_DUPFD_CLOEXEC
if (PyModule_AddIntMacro(m, F_DUPFD_CLOEXEC)) return -1;
#endif
#ifdef F_GETFD
if (PyModule_AddIntMacro(m, F_GETFD)) return -1;
#endif
#ifdef F_SETFD
if (PyModule_AddIntMacro(m, F_SETFD)) return -1;
#endif
#ifdef F_GETFL
if (PyModule_AddIntMacro(m, F_GETFL)) return -1;
#endif
#ifdef F_SETFL
if (PyModule_AddIntMacro(m, F_SETFL)) return -1;
#endif
#ifdef F_GETLK
if (PyModule_AddIntMacro(m, F_GETLK)) return -1;
#endif
#ifdef F_SETLK
if (PyModule_AddIntMacro(m, F_SETLK)) return -1;
#endif
#ifdef F_SETLKW
if (PyModule_AddIntMacro(m, F_SETLKW)) return -1;
#endif
#ifdef F_OFD_GETLK
if (PyModule_AddIntMacro(m, F_OFD_GETLK)) return -1;
#endif
#ifdef F_OFD_SETLK
if (PyModule_AddIntMacro(m, F_OFD_SETLK)) return -1;
#endif
#ifdef F_OFD_SETLKW
if (PyModule_AddIntMacro(m, F_OFD_SETLKW)) return -1;
#endif
#ifdef F_GETOWN
if (PyModule_AddIntMacro(m, F_GETOWN)) return -1;
#endif
#ifdef F_SETOWN
if (PyModule_AddIntMacro(m, F_SETOWN)) return -1;
#endif
#ifdef F_GETPATH
if (PyModule_AddIntMacro(m, F_GETPATH)) return -1;
#endif
#ifdef F_GETSIG
if (PyModule_AddIntMacro(m, F_GETSIG)) return -1;
#endif
#ifdef F_SETSIG
if (PyModule_AddIntMacro(m, F_SETSIG)) return -1;
#endif
#ifdef F_RDLCK
if (PyModule_AddIntMacro(m, F_RDLCK)) return -1;
#endif
#ifdef F_WRLCK
if (PyModule_AddIntMacro(m, F_WRLCK)) return -1;
#endif
#ifdef F_UNLCK
if (PyModule_AddIntMacro(m, F_UNLCK)) return -1;
#endif
/* LFS constants */
#ifdef F_GETLK64
if (PyModule_AddIntMacro(m, F_GETLK64)) return -1;
#endif
#ifdef F_SETLK64
if (PyModule_AddIntMacro(m, F_SETLK64)) return -1;
#endif
#ifdef F_SETLKW64
if (PyModule_AddIntMacro(m, F_SETLKW64)) return -1;
#endif
/* GNU extensions, as of glibc 2.2.4. */
#ifdef FASYNC
if (PyModule_AddIntMacro(m, FASYNC)) return -1;
#endif
#ifdef F_SETLEASE
if (PyModule_AddIntMacro(m, F_SETLEASE)) return -1;
#endif
#ifdef F_GETLEASE
if (PyModule_AddIntMacro(m, F_GETLEASE)) return -1;
#endif
#ifdef F_NOTIFY
if (PyModule_AddIntMacro(m, F_NOTIFY)) return -1;
#endif
#ifdef F_DUPFD_QUERY
if (PyModule_AddIntMacro(m, F_DUPFD_QUERY)) return -1;
#endif
/* Old BSD flock(). */
#ifdef F_EXLCK
if (PyModule_AddIntMacro(m, F_EXLCK)) return -1;
#endif
#ifdef F_SHLCK
if (PyModule_AddIntMacro(m, F_SHLCK)) return -1;
#endif
/* Linux specifics */
#ifdef F_SETPIPE_SZ
if (PyModule_AddIntMacro(m, F_SETPIPE_SZ)) return -1;
#endif
#ifdef F_GETPIPE_SZ
if (PyModule_AddIntMacro(m, F_GETPIPE_SZ)) return -1;
#endif
/* On Android, FICLONE is blocked by SELinux. */
#ifndef __ANDROID__
#ifdef FICLONE
if (PyModule_AddIntMacro(m, FICLONE)) return -1;
#endif
#ifdef FICLONERANGE
if (PyModule_AddIntMacro(m, FICLONERANGE)) return -1;
#endif
#endif
#ifdef F_GETOWN_EX
// since Linux 2.6.32
if (PyModule_AddIntMacro(m, F_GETOWN_EX)) return -1;
if (PyModule_AddIntMacro(m, F_SETOWN_EX)) return -1;
if (PyModule_AddIntMacro(m, F_OWNER_TID)) return -1;
if (PyModule_AddIntMacro(m, F_OWNER_PID)) return -1;
if (PyModule_AddIntMacro(m, F_OWNER_PGRP)) return -1;
#endif
#ifdef F_GET_RW_HINT
// since Linux 4.13
if (PyModule_AddIntMacro(m, F_GET_RW_HINT)) return -1;
if (PyModule_AddIntMacro(m, F_SET_RW_HINT)) return -1;
if (PyModule_AddIntMacro(m, F_GET_FILE_RW_HINT)) return -1;
if (PyModule_AddIntMacro(m, F_SET_FILE_RW_HINT)) return -1;
#ifndef RWH_WRITE_LIFE_NOT_SET // typo in Linux < 5.5
# define RWH_WRITE_LIFE_NOT_SET RWF_WRITE_LIFE_NOT_SET
#endif
if (PyModule_AddIntMacro(m, RWH_WRITE_LIFE_NOT_SET)) return -1;
if (PyModule_AddIntMacro(m, RWH_WRITE_LIFE_NONE)) return -1;
if (PyModule_AddIntMacro(m, RWH_WRITE_LIFE_SHORT)) return -1;
if (PyModule_AddIntMacro(m, RWH_WRITE_LIFE_MEDIUM)) return -1;
if (PyModule_AddIntMacro(m, RWH_WRITE_LIFE_LONG)) return -1;
if (PyModule_AddIntMacro(m, RWH_WRITE_LIFE_EXTREME)) return -1;
#endif
/* OS X specifics */
#ifdef F_FULLFSYNC
if (PyModule_AddIntMacro(m, F_FULLFSYNC)) return -1;
#endif
#ifdef F_NOCACHE
if (PyModule_AddIntMacro(m, F_NOCACHE)) return -1;
#endif
/* FreeBSD specifics */
#ifdef F_DUP2FD
if (PyModule_AddIntMacro(m, F_DUP2FD)) return -1;
#endif
#ifdef F_DUP2FD_CLOEXEC
if (PyModule_AddIntMacro(m, F_DUP2FD_CLOEXEC)) return -1;
#endif
#ifdef F_READAHEAD
if (PyModule_AddIntMacro(m, F_READAHEAD)) return -1;
#endif
#ifdef F_RDAHEAD
if (PyModule_AddIntMacro(m, F_RDAHEAD)) return -1;
#endif
#ifdef F_ISUNIONSTACK
if (PyModule_AddIntMacro(m, F_ISUNIONSTACK)) return -1;
#endif
#ifdef F_KINFO
if (PyModule_AddIntMacro(m, F_KINFO)) return -1;
#endif
/* NetBSD specifics */
#ifdef F_CLOSEM
if (PyModule_AddIntMacro(m, F_CLOSEM)) return -1;
#endif
#ifdef F_MAXFD
if (PyModule_AddIntMacro(m, F_MAXFD)) return -1;
#endif
#ifdef F_GETNOSIGPIPE
if (PyModule_AddIntMacro(m, F_GETNOSIGPIPE)) return -1;
#endif
#ifdef F_SETNOSIGPIPE
if (PyModule_AddIntMacro(m, F_SETNOSIGPIPE)) return -1;
#endif
/* For F_{GET|SET}FL */
#ifdef FD_CLOEXEC
if (PyModule_AddIntMacro(m, FD_CLOEXEC)) return -1;
#endif
/* For F_NOTIFY */
#ifdef DN_ACCESS
if (PyModule_AddIntMacro(m, DN_ACCESS)) return -1;
#endif
#ifdef DN_MODIFY
if (PyModule_AddIntMacro(m, DN_MODIFY)) return -1;
#endif
#ifdef DN_CREATE
if (PyModule_AddIntMacro(m, DN_CREATE)) return -1;
#endif
#ifdef DN_DELETE
if (PyModule_AddIntMacro(m, DN_DELETE)) return -1;
#endif
#ifdef DN_RENAME
if (PyModule_AddIntMacro(m, DN_RENAME)) return -1;
#endif
#ifdef DN_ATTRIB
if (PyModule_AddIntMacro(m, DN_ATTRIB)) return -1;
#endif
#ifdef DN_MULTISHOT
if (PyModule_AddIntMacro(m, DN_MULTISHOT)) return -1;
#endif
#ifdef HAVE_STROPTS_H
/* Unix 98 guarantees that these are in stropts.h. */
if (PyModule_AddIntMacro(m, I_PUSH)) return -1;
if (PyModule_AddIntMacro(m, I_POP)) return -1;
if (PyModule_AddIntMacro(m, I_LOOK)) return -1;
if (PyModule_AddIntMacro(m, I_FLUSH)) return -1;
if (PyModule_AddIntMacro(m, I_FLUSHBAND)) return -1;
if (PyModule_AddIntMacro(m, I_SETSIG)) return -1;
if (PyModule_AddIntMacro(m, I_GETSIG)) return -1;
if (PyModule_AddIntMacro(m, I_FIND)) return -1;
if (PyModule_AddIntMacro(m, I_PEEK)) return -1;
if (PyModule_AddIntMacro(m, I_SRDOPT)) return -1;
if (PyModule_AddIntMacro(m, I_GRDOPT)) return -1;
if (PyModule_AddIntMacro(m, I_NREAD)) return -1;
if (PyModule_AddIntMacro(m, I_FDINSERT)) return -1;
if (PyModule_AddIntMacro(m, I_STR)) return -1;
if (PyModule_AddIntMacro(m, I_SWROPT)) return -1;
#ifdef I_GWROPT
/* despite the comment above, old-ish glibcs miss a couple... */
if (PyModule_AddIntMacro(m, I_GWROPT)) return -1;
#endif
if (PyModule_AddIntMacro(m, I_SENDFD)) return -1;
if (PyModule_AddIntMacro(m, I_RECVFD)) return -1;
if (PyModule_AddIntMacro(m, I_LIST)) return -1;
if (PyModule_AddIntMacro(m, I_ATMARK)) return -1;
if (PyModule_AddIntMacro(m, I_CKBAND)) return -1;
if (PyModule_AddIntMacro(m, I_GETBAND)) return -1;
if (PyModule_AddIntMacro(m, I_CANPUT)) return -1;
if (PyModule_AddIntMacro(m, I_SETCLTIME)) return -1;
#ifdef I_GETCLTIME
if (PyModule_AddIntMacro(m, I_GETCLTIME)) return -1;
#endif
if (PyModule_AddIntMacro(m, I_LINK)) return -1;
if (PyModule_AddIntMacro(m, I_UNLINK)) return -1;
if (PyModule_AddIntMacro(m, I_PLINK)) return -1;
if (PyModule_AddIntMacro(m, I_PUNLINK)) return -1;
#endif
#ifdef F_ADD_SEALS
/* Linux: file sealing for memfd_create() */
if (PyModule_AddIntMacro(m, F_ADD_SEALS)) return -1;
if (PyModule_AddIntMacro(m, F_GET_SEALS)) return -1;
if (PyModule_AddIntMacro(m, F_SEAL_SEAL)) return -1;
if (PyModule_AddIntMacro(m, F_SEAL_SHRINK)) return -1;
if (PyModule_AddIntMacro(m, F_SEAL_GROW)) return -1;
if (PyModule_AddIntMacro(m, F_SEAL_WRITE)) return -1;
#ifdef F_SEAL_FUTURE_WRITE
if (PyModule_AddIntMacro(m, F_SEAL_FUTURE_WRITE)) return -1;
#endif
#endif
return 0;
}
static int
fcntl_exec(PyObject *module)
{
if (all_ins(module) < 0) {
return -1;
}
return 0;
}
static PyModuleDef_Slot fcntl_slots[] = {
{Py_mod_exec, fcntl_exec},
{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
{Py_mod_gil, Py_MOD_GIL_NOT_USED},
{0, NULL}
};
static struct PyModuleDef fcntlmodule = {
PyModuleDef_HEAD_INIT,
.m_name = "fcntl",
.m_doc = module_doc,
.m_size = 0,
.m_methods = fcntl_methods,
.m_slots = fcntl_slots,
};
PyMODINIT_FUNC
PyInit_fcntl(void)
{
return PyModuleDef_Init(&fcntlmodule);
}
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