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authorOri Bernstein <ori@eigenstate.org>2021-06-14 00:00:37 +0000
committerOri Bernstein <ori@eigenstate.org>2021-06-14 00:00:37 +0000
commita73a964e51247ed169d322c725a3a18859f109a3 (patch)
tree3f752d117274d444bda44e85609aeac1acf313f3 /sys/src/cmd/python/Modules/fcntlmodule.c
parente64efe273fcb921a61bf27d33b230c4e64fcd425 (diff)
python, hg: tow outside the environment.
they've served us well, and can ride off into the sunset.
Diffstat (limited to 'sys/src/cmd/python/Modules/fcntlmodule.c')
-rw-r--r--sys/src/cmd/python/Modules/fcntlmodule.c609
1 files changed, 0 insertions, 609 deletions
diff --git a/sys/src/cmd/python/Modules/fcntlmodule.c b/sys/src/cmd/python/Modules/fcntlmodule.c
deleted file mode 100644
index 0b9a1cbd1..000000000
--- a/sys/src/cmd/python/Modules/fcntlmodule.c
+++ /dev/null
@@ -1,609 +0,0 @@
-
-/* fcntl module */
-
-#define PY_SSIZE_T_CLEAN
-
-#include "Python.h"
-
-#ifdef HAVE_SYS_FILE_H
-#include <sys/file.h>
-#endif
-
-#include <sys/ioctl.h>
-#include <fcntl.h>
-#ifdef HAVE_STROPTS_H
-#include <stropts.h>
-#endif
-
-static int
-conv_descriptor(PyObject *object, int *target)
-{
- int fd = PyObject_AsFileDescriptor(object);
-
- if (fd < 0)
- return 0;
- *target = fd;
- return 1;
-}
-
-
-/* fcntl(fd, opt, [arg]) */
-
-static PyObject *
-fcntl_fcntl(PyObject *self, PyObject *args)
-{
- int fd;
- int code;
- int arg;
- int ret;
- char *str;
- Py_ssize_t len;
- char buf[1024];
-
- if (PyArg_ParseTuple(args, "O&is#:fcntl",
- conv_descriptor, &fd, &code, &str, &len)) {
- if (len > sizeof buf) {
- PyErr_SetString(PyExc_ValueError,
- "fcntl string arg too long");
- return NULL;
- }
- memcpy(buf, str, len);
- Py_BEGIN_ALLOW_THREADS
- ret = fcntl(fd, code, buf);
- Py_END_ALLOW_THREADS
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- return PyString_FromStringAndSize(buf, len);
- }
-
- PyErr_Clear();
- arg = 0;
- if (!PyArg_ParseTuple(args,
- "O&i|i;fcntl requires a file or file descriptor,"
- " an integer and optionally a third integer or a string",
- conv_descriptor, &fd, &code, &arg)) {
- return NULL;
- }
- Py_BEGIN_ALLOW_THREADS
- ret = fcntl(fd, code, arg);
- Py_END_ALLOW_THREADS
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- return PyInt_FromLong((long)ret);
-}
-
-PyDoc_STRVAR(fcntl_doc,
-"fcntl(fd, opt, [arg])\n\
-\n\
-Perform the requested operation on file descriptor fd. The operation\n\
-is defined by op and is operating system dependent. These constants are\n\
-available from the fcntl module. The argument arg is optional, and\n\
-defaults to 0; it may be an int or a string. If arg is given as a string,\n\
-the return value of fcntl is a string of that length, containing the\n\
-resulting value put in the arg buffer by the operating system.The length\n\
-of the arg string is not allowed to exceed 1024 bytes. If the arg given\n\
-is an integer or if none is specified, the result value is an integer\n\
-corresponding to the return value of the fcntl call in the C code.");
-
-
-/* ioctl(fd, opt, [arg]) */
-
-static PyObject *
-fcntl_ioctl(PyObject *self, PyObject *args)
-{
-#define IOCTL_BUFSZ 1024
- int fd;
- /* In PyArg_ParseTuple below, use the unsigned int 'I' format for
- the signed int 'code' variable, because Python turns 0x8000000
- into a large positive number (PyLong, or PyInt on 64-bit
- platforms,) whereas C expects it to be a negative int */
- int code;
- int arg;
- int ret;
- char *str;
- Py_ssize_t len;
- int mutate_arg = 1;
- char buf[IOCTL_BUFSZ+1]; /* argument plus NUL byte */
-
- if (PyArg_ParseTuple(args, "O&Iw#|i:ioctl",
- conv_descriptor, &fd, &code,
- &str, &len, &mutate_arg)) {
- char *arg;
-
- if (mutate_arg) {
- if (len <= IOCTL_BUFSZ) {
- memcpy(buf, str, len);
- buf[len] = '\0';
- arg = buf;
- }
- else {
- arg = str;
- }
- }
- else {
- if (len > IOCTL_BUFSZ) {
- PyErr_SetString(PyExc_ValueError,
- "ioctl string arg too long");
- return NULL;
- }
- else {
- memcpy(buf, str, len);
- buf[len] = '\0';
- arg = buf;
- }
- }
- if (buf == arg) {
- Py_BEGIN_ALLOW_THREADS /* think array.resize() */
- ret = ioctl(fd, code, arg);
- Py_END_ALLOW_THREADS
- }
- else {
- ret = ioctl(fd, code, arg);
- }
- if (mutate_arg && (len < IOCTL_BUFSZ)) {
- memcpy(str, buf, len);
- }
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- if (mutate_arg) {
- return PyInt_FromLong(ret);
- }
- else {
- return PyString_FromStringAndSize(buf, len);
- }
- }
-
- PyErr_Clear();
- if (PyArg_ParseTuple(args, "O&Is#:ioctl",
- conv_descriptor, &fd, &code, &str, &len)) {
- if (len > IOCTL_BUFSZ) {
- PyErr_SetString(PyExc_ValueError,
- "ioctl string arg too long");
- return NULL;
- }
- memcpy(buf, str, len);
- buf[len] = '\0';
- Py_BEGIN_ALLOW_THREADS
- ret = ioctl(fd, code, buf);
- Py_END_ALLOW_THREADS
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- return PyString_FromStringAndSize(buf, len);
- }
-
- PyErr_Clear();
- arg = 0;
- if (!PyArg_ParseTuple(args,
- "O&I|i;ioctl requires a file or file descriptor,"
- " an integer and optionally an integer or buffer argument",
- conv_descriptor, &fd, &code, &arg)) {
- return NULL;
- }
- Py_BEGIN_ALLOW_THREADS
-#ifdef __VMS
- ret = ioctl(fd, code, (void *)arg);
-#else
- ret = ioctl(fd, code,
-#ifdef PLAN9APE
- (void *)
-#endif
- arg);
-#endif
- Py_END_ALLOW_THREADS
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- return PyInt_FromLong((long)ret);
-#undef IOCTL_BUFSZ
-}
-
-PyDoc_STRVAR(ioctl_doc,
-"ioctl(fd, opt[, arg[, mutate_flag]])\n\
-\n\
-Perform the requested operation on file descriptor fd. The operation is\n\
-defined by opt and is operating system dependent. Typically these codes are\n\
-retrieved from the fcntl or termios library modules.\n\
-\n\
-The argument arg is optional, and defaults to 0; it may be an int or a\n\
-buffer containing character data (most likely a string or an array). \n\
-\n\
-If the argument is a mutable buffer (such as an array) and if the\n\
-mutate_flag argument (which is only allowed in this case) is true then the\n\
-buffer is (in effect) passed to the operating system and changes made by\n\
-the OS will be reflected in the contents of the buffer after the call has\n\
-returned. The return value is the integer returned by the ioctl system\n\
-call.\n\
-\n\
-If the argument is a mutable buffer and the mutable_flag argument is not\n\
-passed or is false, the behavior is as if a string had been passed. This\n\
-behavior will change in future releases of Python.\n\
-\n\
-If the argument is an immutable buffer (most likely a string) then a copy\n\
-of the buffer is passed to the operating system and the return value is a\n\
-string of the same length containing whatever the operating system put in\n\
-the buffer. The length of the arg buffer in this case is not allowed to\n\
-exceed 1024 bytes.\n\
-\n\
-If the arg given is an integer or if none is specified, the result value is\n\
-an integer corresponding to the return value of the ioctl call in the C\n\
-code.");
-
-
-/* flock(fd, operation) */
-
-static PyObject *
-fcntl_flock(PyObject *self, PyObject *args)
-{
- int fd;
- int code;
- int ret;
-
- if (!PyArg_ParseTuple(args, "O&i:flock",
- conv_descriptor, &fd, &code))
- return NULL;
-
-#ifdef HAVE_FLOCK
- Py_BEGIN_ALLOW_THREADS
- ret = flock(fd, code);
- Py_END_ALLOW_THREADS
-#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;
- Py_BEGIN_ALLOW_THREADS
- ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l);
- Py_END_ALLOW_THREADS
- }
-#endif /* HAVE_FLOCK */
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-PyDoc_STRVAR(flock_doc,
-"flock(fd, operation)\n\
-\n\
-Perform the lock operation op on file descriptor fd. See the Unix \n\
-manual page for flock(3) for details. (On some systems, this function is\n\
-emulated using fcntl().)");
-
-
-/* lockf(fd, operation) */
-static PyObject *
-fcntl_lockf(PyObject *self, PyObject *args)
-{
- int fd, code, ret, whence = 0;
- PyObject *lenobj = NULL, *startobj = NULL;
-
- if (!PyArg_ParseTuple(args, "O&i|OOi:lockf",
- conv_descriptor, &fd, &code,
- &lenobj, &startobj, &whence))
- return NULL;
-
-#if defined(PYOS_OS2) && defined(PYCC_GCC)
- PyErr_SetString(PyExc_NotImplementedError,
- "lockf not supported on OS/2 (EMX)");
- return NULL;
-#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 /* 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 = PyInt_AsLong(startobj);
-#else
- if(PyLong_Check(startobj))
- l.l_start = PyLong_AsLongLong(startobj);
- else
- l.l_start = PyInt_AsLong(startobj);
-#endif
- if (PyErr_Occurred())
- return NULL;
- }
- if (lenobj != NULL) {
-#if !defined(HAVE_LARGEFILE_SUPPORT)
- l.l_len = PyInt_AsLong(lenobj);
-#else
- if(PyLong_Check(lenobj))
- l.l_len = PyLong_AsLongLong(lenobj);
- else
- l.l_len = PyInt_AsLong(lenobj);
-#endif
- if (PyErr_Occurred())
- return NULL;
- }
- l.l_whence = whence;
- Py_BEGIN_ALLOW_THREADS
- ret = fcntl(fd, (code & LOCK_NB) ? F_SETLK : F_SETLKW, &l);
- Py_END_ALLOW_THREADS
- }
- if (ret < 0) {
- PyErr_SetFromErrno(PyExc_IOError);
- return NULL;
- }
- Py_INCREF(Py_None);
- return Py_None;
-#endif /* defined(PYOS_OS2) && defined(PYCC_GCC) */
-}
-
-PyDoc_STRVAR(lockf_doc,
-"lockf (fd, operation, length=0, start=0, whence=0)\n\
-\n\
-This is essentially a wrapper around the fcntl() locking calls. fd is the\n\
-file descriptor of the file to lock or unlock, and operation is one of the\n\
-following values:\n\
-\n\
- LOCK_UN - unlock\n\
- LOCK_SH - acquire a shared lock\n\
- LOCK_EX - acquire an exclusive lock\n\
-\n\
-When operation is LOCK_SH or LOCK_EX, it can also be bit-wise OR'd with\n\
-LOCK_NB to avoid blocking on lock acquisition. If LOCK_NB is used and the\n\
-lock cannot be acquired, an IOError will be raised and the exception will\n\
-have an errno attribute set to EACCES or EAGAIN (depending on the operating\n\
-system -- for portability, check for either value).\n\
-\n\
-length is the number of bytes to lock, with the default meaning to lock to\n\
-EOF. start is the byte offset, relative to whence, to that the lock\n\
-starts. whence is as with fileobj.seek(), specifically:\n\
-\n\
- 0 - relative to the start of the file (SEEK_SET)\n\
- 1 - relative to the current buffer position (SEEK_CUR)\n\
- 2 - relative to the end of the file (SEEK_END)");
-
-/* List of functions */
-
-static PyMethodDef fcntl_methods[] = {
- {"fcntl", fcntl_fcntl, METH_VARARGS, fcntl_doc},
- {"ioctl", fcntl_ioctl, METH_VARARGS, ioctl_doc},
- {"flock", fcntl_flock, METH_VARARGS, flock_doc},
- {"lockf", fcntl_lockf, METH_VARARGS, lockf_doc},
- {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
-ins(PyObject* d, char* symbol, long value)
-{
- PyObject* v = PyInt_FromLong(value);
- if (!v || PyDict_SetItemString(d, symbol, v) < 0)
- return -1;
-
- Py_DECREF(v);
- return 0;
-}
-
-#define INS(x) if (ins(d, #x, (long)x)) return -1
-
-static int
-all_ins(PyObject* d)
-{
- if (ins(d, "LOCK_SH", (long)LOCK_SH)) return -1;
- if (ins(d, "LOCK_EX", (long)LOCK_EX)) return -1;
- if (ins(d, "LOCK_NB", (long)LOCK_NB)) return -1;
- if (ins(d, "LOCK_UN", (long)LOCK_UN)) return -1;
-/* GNU extensions, as of glibc 2.2.4 */
-#ifdef LOCK_MAND
- if (ins(d, "LOCK_MAND", (long)LOCK_MAND)) return -1;
-#endif
-#ifdef LOCK_READ
- if (ins(d, "LOCK_READ", (long)LOCK_READ)) return -1;
-#endif
-#ifdef LOCK_WRITE
- if (ins(d, "LOCK_WRITE", (long)LOCK_WRITE)) return -1;
-#endif
-#ifdef LOCK_RW
- if (ins(d, "LOCK_RW", (long)LOCK_RW)) return -1;
-#endif
-
-#ifdef F_DUPFD
- if (ins(d, "F_DUPFD", (long)F_DUPFD)) return -1;
-#endif
-#ifdef F_GETFD
- if (ins(d, "F_GETFD", (long)F_GETFD)) return -1;
-#endif
-#ifdef F_SETFD
- if (ins(d, "F_SETFD", (long)F_SETFD)) return -1;
-#endif
-#ifdef F_GETFL
- if (ins(d, "F_GETFL", (long)F_GETFL)) return -1;
-#endif
-#ifdef F_SETFL
- if (ins(d, "F_SETFL", (long)F_SETFL)) return -1;
-#endif
-#ifdef F_GETLK
- if (ins(d, "F_GETLK", (long)F_GETLK)) return -1;
-#endif
-#ifdef F_SETLK
- if (ins(d, "F_SETLK", (long)F_SETLK)) return -1;
-#endif
-#ifdef F_SETLKW
- if (ins(d, "F_SETLKW", (long)F_SETLKW)) return -1;
-#endif
-#ifdef F_GETOWN
- if (ins(d, "F_GETOWN", (long)F_GETOWN)) return -1;
-#endif
-#ifdef F_SETOWN
- if (ins(d, "F_SETOWN", (long)F_SETOWN)) return -1;
-#endif
-#ifdef F_GETSIG
- if (ins(d, "F_GETSIG", (long)F_GETSIG)) return -1;
-#endif
-#ifdef F_SETSIG
- if (ins(d, "F_SETSIG", (long)F_SETSIG)) return -1;
-#endif
-#ifdef F_RDLCK
- if (ins(d, "F_RDLCK", (long)F_RDLCK)) return -1;
-#endif
-#ifdef F_WRLCK
- if (ins(d, "F_WRLCK", (long)F_WRLCK)) return -1;
-#endif
-#ifdef F_UNLCK
- if (ins(d, "F_UNLCK", (long)F_UNLCK)) return -1;
-#endif
-/* LFS constants */
-#ifdef F_GETLK64
- if (ins(d, "F_GETLK64", (long)F_GETLK64)) return -1;
-#endif
-#ifdef F_SETLK64
- if (ins(d, "F_SETLK64", (long)F_SETLK64)) return -1;
-#endif
-#ifdef F_SETLKW64
- if (ins(d, "F_SETLKW64", (long)F_SETLKW64)) return -1;
-#endif
-/* GNU extensions, as of glibc 2.2.4. */
-#ifdef F_SETLEASE
- if (ins(d, "F_SETLEASE", (long)F_SETLEASE)) return -1;
-#endif
-#ifdef F_GETLEASE
- if (ins(d, "F_GETLEASE", (long)F_GETLEASE)) return -1;
-#endif
-#ifdef F_NOTIFY
- if (ins(d, "F_NOTIFY", (long)F_NOTIFY)) return -1;
-#endif
-/* Old BSD flock(). */
-#ifdef F_EXLCK
- if (ins(d, "F_EXLCK", (long)F_EXLCK)) return -1;
-#endif
-#ifdef F_SHLCK
- if (ins(d, "F_SHLCK", (long)F_SHLCK)) return -1;
-#endif
-
-/* For F_{GET|SET}FL */
-#ifdef FD_CLOEXEC
- if (ins(d, "FD_CLOEXEC", (long)FD_CLOEXEC)) return -1;
-#endif
-
-/* For F_NOTIFY */
-#ifdef DN_ACCESS
- if (ins(d, "DN_ACCESS", (long)DN_ACCESS)) return -1;
-#endif
-#ifdef DN_MODIFY
- if (ins(d, "DN_MODIFY", (long)DN_MODIFY)) return -1;
-#endif
-#ifdef DN_CREATE
- if (ins(d, "DN_CREATE", (long)DN_CREATE)) return -1;
-#endif
-#ifdef DN_DELETE
- if (ins(d, "DN_DELETE", (long)DN_DELETE)) return -1;
-#endif
-#ifdef DN_RENAME
- if (ins(d, "DN_RENAME", (long)DN_RENAME)) return -1;
-#endif
-#ifdef DN_ATTRIB
- if (ins(d, "DN_ATTRIB", (long)DN_ATTRIB)) return -1;
-#endif
-#ifdef DN_MULTISHOT
- if (ins(d, "DN_MULTISHOT", (long)DN_MULTISHOT)) return -1;
-#endif
-
-#ifdef HAVE_STROPTS_H
- /* Unix 98 guarantees that these are in stropts.h. */
- INS(I_PUSH);
- INS(I_POP);
- INS(I_LOOK);
- INS(I_FLUSH);
- INS(I_FLUSHBAND);
- INS(I_SETSIG);
- INS(I_GETSIG);
- INS(I_FIND);
- INS(I_PEEK);
- INS(I_SRDOPT);
- INS(I_GRDOPT);
- INS(I_NREAD);
- INS(I_FDINSERT);
- INS(I_STR);
- INS(I_SWROPT);
-#ifdef I_GWROPT
- /* despite the comment above, old-ish glibcs miss a couple... */
- INS(I_GWROPT);
-#endif
- INS(I_SENDFD);
- INS(I_RECVFD);
- INS(I_LIST);
- INS(I_ATMARK);
- INS(I_CKBAND);
- INS(I_GETBAND);
- INS(I_CANPUT);
- INS(I_SETCLTIME);
-#ifdef I_GETCLTIME
- INS(I_GETCLTIME);
-#endif
- INS(I_LINK);
- INS(I_UNLINK);
- INS(I_PLINK);
- INS(I_PUNLINK);
-#endif
-
- return 0;
-}
-
-PyMODINIT_FUNC
-initfcntl(void)
-{
- PyObject *m, *d;
-
- /* Create the module and add the functions and documentation */
- m = Py_InitModule3("fcntl", fcntl_methods, module_doc);
- if (m == NULL)
- return;
-
- /* Add some symbolic constants to the module */
- d = PyModule_GetDict(m);
- all_ins(d);
-}