307 lines
8.3 KiB
C
307 lines
8.3 KiB
C
/* termiosmodule.c -- POSIX terminal I/O module implementation. */
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#include <Python.h>
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#define PyInit_termios inittermios
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#include <termios.h>
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static char termios__doc__[] = "\
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This module provides an interface to the Posix calls for tty I/O control.\n\
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For a complete description of these calls, see the Posix or Unix manual\n\
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pages. It is only available for those Unix versions that support Posix\n\
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termios style tty I/O control (and then only if configured at installation\n\
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time).\n\
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\n\
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All functions in this module take a file descriptor fd as their first\n\
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argument. This must be an integer file descriptor, such as returned by\n\
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sys.stdin.fileno().\n\
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\n\
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This module should be used in conjunction with the TERMIOS module,\n\
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which defines the relevant symbolic constants.";
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#define BAD "bad termios argument"
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static PyObject *TermiosError;
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/* termios = tcgetattr(fd)
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termios is
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[iflag, oflag, cflag, lflag, ispeed, ospeed, [cc[0], ..., cc[NCCS]]]
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Return the attributes of the terminal device. */
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static char termios_tcgetattr__doc__[] = "\
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tcgetattr(fd) -> list_of_attrs\n\
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Get the tty attributes for file descriptor fd, as follows:\n\
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[iflag, oflag, cflag, lflag, ispeed, ospeed, cc] where cc is a list\n\
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of the tty special characters (each a string of length 1, except the items\n\
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with indices VMIN and VTIME, which are integers when these fields are\n\
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defined). The interpretation of the flags and the speeds as well as the\n\
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indexing in the cc array must be done using the symbolic constants defined\n\
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in the TERMIOS module.";
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static PyObject *
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termios_tcgetattr(self, args)
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PyObject *self;
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PyObject *args;
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{
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int fd;
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struct termios mode;
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PyObject *cc;
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speed_t ispeed, ospeed;
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PyObject *v;
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int i;
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char ch;
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if (!PyArg_Parse(args, "i", &fd))
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return NULL;
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if (tcgetattr(fd, &mode) == -1)
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return PyErr_SetFromErrno(TermiosError);
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ispeed = cfgetispeed(&mode);
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ospeed = cfgetospeed(&mode);
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cc = PyList_New(NCCS);
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if (cc == NULL)
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return NULL;
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for (i = 0; i < NCCS; i++) {
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ch = (char)mode.c_cc[i];
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v = PyString_FromStringAndSize(&ch, 1);
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if (v == NULL)
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goto err;
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PyList_SetItem(cc, i, v);
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}
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/* Convert the MIN and TIME slots to integer. On some systems, the
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MIN and TIME slots are the same as the EOF and EOL slots. So we
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only do this in noncanonical input mode. */
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if ((mode.c_lflag & ICANON) == 0) {
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v = PyInt_FromLong((long)mode.c_cc[VMIN]);
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if (v == NULL)
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goto err;
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PyList_SetItem(cc, VMIN, v);
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v = PyInt_FromLong((long)mode.c_cc[VTIME]);
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if (v == NULL)
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goto err;
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PyList_SetItem(cc, VTIME, v);
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}
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if (!(v = PyList_New(7)))
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goto err;
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PyList_SetItem(v, 0, PyInt_FromLong((long)mode.c_iflag));
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PyList_SetItem(v, 1, PyInt_FromLong((long)mode.c_oflag));
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PyList_SetItem(v, 2, PyInt_FromLong((long)mode.c_cflag));
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PyList_SetItem(v, 3, PyInt_FromLong((long)mode.c_lflag));
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PyList_SetItem(v, 4, PyInt_FromLong((long)ispeed));
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PyList_SetItem(v, 5, PyInt_FromLong((long)ospeed));
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PyList_SetItem(v, 6, cc);
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if (PyErr_Occurred()){
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Py_DECREF(v);
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goto err;
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}
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return v;
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err:
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Py_DECREF(cc);
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return NULL;
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}
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/* tcsetattr(fd, when, termios)
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Set the attributes of the terminal device. */
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static char termios_tcsetattr__doc__[] = "\
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tcsetattr(fd, when, attributes) -> None\n\
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Set the tty attributes for file descriptor fd.\n\
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The attributes to be set are taken from the attributes argument, which\n\
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is a list like the one returned by tcgetattr(). The when argument\n\
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determines when the attributes are changed: TERMIOS.TCSANOW to\n\
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change immediately, TERMIOS.TCSADRAIN to change after transmitting all\n\
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queued output, or TERMIOS.TCSAFLUSH to change after transmitting all\n\
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queued output and discarding all queued input. ";
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static PyObject *
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termios_tcsetattr(self, args)
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PyObject *self;
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PyObject *args;
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{
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int fd, when;
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struct termios mode;
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speed_t ispeed, ospeed;
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PyObject *term, *cc, *v;
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int i;
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if (!PyArg_Parse(args, "(iiO)", &fd, &when, &term))
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return NULL;
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if (!PyList_Check(term) || PyList_Size(term) != 7) {
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PyErr_SetString(PyExc_TypeError, BAD);
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return NULL;
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}
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mode.c_iflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 0));
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mode.c_oflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 1));
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mode.c_cflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 2));
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mode.c_lflag = (tcflag_t) PyInt_AsLong(PyList_GetItem(term, 3));
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ispeed = (speed_t) PyInt_AsLong(PyList_GetItem(term, 4));
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ospeed = (speed_t) PyInt_AsLong(PyList_GetItem(term, 5));
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cc = PyList_GetItem(term, 6);
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if (PyErr_Occurred())
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return NULL;
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if (!PyList_Check(cc) || PyList_Size(cc) != NCCS) {
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PyErr_SetString(PyExc_TypeError, BAD);
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return NULL;
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}
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for (i = 0; i < NCCS; i++) {
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v = PyList_GetItem(cc, i);
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if (PyString_Check(v) && PyString_Size(v) == 1)
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mode.c_cc[i] = (cc_t) * PyString_AsString(v);
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else if (PyInt_Check(v))
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mode.c_cc[i] = (cc_t) PyInt_AsLong(v);
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else {
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PyErr_SetString(PyExc_TypeError, BAD);
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return NULL;
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}
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}
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if (cfsetispeed(&mode, (speed_t) ispeed) == -1)
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return PyErr_SetFromErrno(TermiosError);
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if (cfsetospeed(&mode, (speed_t) ospeed) == -1)
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return PyErr_SetFromErrno(TermiosError);
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if (tcsetattr(fd, when, &mode) == -1)
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return PyErr_SetFromErrno(TermiosError);
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Py_INCREF(Py_None);
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return Py_None;
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}
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/* tcsendbreak(fd, duration)
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Generate a break condition. */
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static char termios_tcsendbreak__doc__[] = "\
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tcsendbreak(fd, duration) -> None\n\
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Send a break on file descriptor fd.\n\
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A zero duration sends a break for 0.25-0.5 seconds; a nonzero duration \n\
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has a system dependent meaning. ";
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static PyObject *
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termios_tcsendbreak(self, args)
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PyObject *self;
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PyObject *args;
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{
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int fd, duration;
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if (!PyArg_Parse(args, "(ii)", &fd, &duration))
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return NULL;
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if (tcsendbreak(fd, duration) == -1)
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return PyErr_SetFromErrno(TermiosError);
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Py_INCREF(Py_None);
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return Py_None;
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}
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/* tcdrain(fd)
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Wait until all queued output to the terminal has been
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transmitted. */
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static char termios_tcdrain__doc__[] = "\
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tcdrain(fd) -> None\n\
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Wait until all output written to file descriptor fd has been transmitted. ";
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static PyObject *
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termios_tcdrain(self, args)
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PyObject *self;
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PyObject *args;
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{
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int fd;
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if (!PyArg_Parse(args, "i", &fd))
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return NULL;
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if (tcdrain(fd) == -1)
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return PyErr_SetFromErrno(TermiosError);
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Py_INCREF(Py_None);
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return Py_None;
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}
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/* tcflush(fd, queue)
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Clear the input and/or output queues associated with
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the terminal. */
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static char termios_tcflush__doc__[] = "\
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tcflush(fd, queue) -> None\n\
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Discard queued data on file descriptor fd.\n\
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The queue selector specifies which queue: TERMIOS.TCIFLUSH for the input\n\
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queue, TERMIOS.TCOFLUSH for the output queue, or TERMIOS.TCIOFLUSH for\n\
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both queues. ";
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static PyObject *
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termios_tcflush(self, args)
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PyObject *self;
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PyObject *args;
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{
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int fd, queue;
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if (!PyArg_Parse(args, "(ii)", &fd, &queue))
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return NULL;
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if (tcflush(fd, queue) == -1)
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return PyErr_SetFromErrno(TermiosError);
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Py_INCREF(Py_None);
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return Py_None;
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}
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/* tcflow(fd, action)
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Perform operations relating to XON/XOFF flow control on
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the terminal. */
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static char termios_tcflow__doc__[] = "\
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tcflow(fd, action) -> None\n\
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Suspend or resume input or output on file descriptor fd.\n\
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The action argument can be TERMIOS.TCOOFF to suspend output,\n\
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TERMIOS.TCOON to restart output, TERMIOS.TCIOFF to suspend input,\n\
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or TERMIOS.TCION to restart input. ";
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static PyObject *
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termios_tcflow(self, args)
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PyObject *self;
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PyObject *args;
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{
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int fd, action;
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if (!PyArg_Parse(args, "(ii)", &fd, &action))
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return NULL;
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if (tcflow(fd, action) == -1)
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return PyErr_SetFromErrno(TermiosError);
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Py_INCREF(Py_None);
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return Py_None;
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}
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static PyMethodDef termios_methods[] =
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{
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{"tcgetattr", termios_tcgetattr, 0, termios_tcgetattr__doc__},
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{"tcsetattr", termios_tcsetattr, 0, termios_tcsetattr__doc__},
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{"tcsendbreak", termios_tcsendbreak, 0, termios_tcsendbreak__doc__},
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{"tcdrain", termios_tcdrain, 0, termios_tcdrain__doc__},
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{"tcflush", termios_tcflush, 0, termios_tcflush__doc__},
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{"tcflow", termios_tcflow, 0, termios_tcflow__doc__},
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{NULL, NULL}
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};
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void
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PyInit_termios()
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{
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PyObject *m, *d;
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m = Py_InitModule4("termios", termios_methods, termios__doc__,
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(PyObject *)NULL, PYTHON_API_VERSION);
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d = PyModule_GetDict(m);
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TermiosError = PyErr_NewException("termios.error", NULL, NULL);
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PyDict_SetItemString(d, "error", TermiosError);
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}
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