cursor.c

/*
   Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
   All rights reserved.
   Copyright (C) 2007-2010, Gabriel Dos Reis.
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are
   met:

       - Redistributions of source code must retain the above copyright
         notice, this list of conditions and the following disclaimer.

       - Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in
         the documentation and/or other materials provided with the
         distribution.

       - Neither the name of The Numerical ALgorithms Group Ltd. nor the
         names of its contributors may be used to endorse or promote products
         derived from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdlib.h>
#include "openaxiom-c-macros.h"

#include "cursor.h"

/*
 * This routine changes the shape of the cursor. it is a modified version of
 * a program by SMWatt, called cursor.c. JMW 6/22/89
 */

/* this stuff can only be done on AIX <AND> the right terminal (aixterm,hft) */
#if (defined(RIOSplatform) ||  defined(RTplatform)) && !defined(_AIX41)
#include "edible.h"
/* the HFT stuff requires ioctl's and termio's */
#include <termio.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/hft.h>

int
Cursor_shape(int shape)
{
    int hftfd;
    char hftpath[16], s[100];
    int chno;
    int i;
    struct termio oldterm, newterm;
    struct hftgetid hftgid;
    char *termVal;

    termVal = oa_getenv("TERM");
    if (strcmp("hft", termVal) && strncmp("aixterm", termVal, 7))
        return;



    /* determine the desired shape */
    if (shape < 0 || shape > 5) {
        fprintf(stderr, "%d - Invalid cursor number\n");
        return (-1);
    }
    /* change the shape */
    s[0] = 033;                 /* hf_intro.hf_esc      */
    s[1] = '[';                 /* hf_intro.hf_lbr      */
    s[2] = 'x';                 /* hf_intro.hf_ex       */
    s[3] = 0;                   /* hf_intro.hf_len[0]   */
    s[4] = 0;                   /* hf_intro.hf_len[1]   */
    s[5] = 0;                   /* hf_intro.hf_len[2]   */
    s[6] = 10;                  /* hf_intro.hf_len[3]   */
    s[7] = 2;                   /* hf_intro.hf_typehi   */
    s[8] = 8;                   /* hf_intro.hf_typelo   */
    s[9] = 2;                   /* hf_sublen            */
    s[10] = 0;                  /* hf_subtype           */
    s[11] = 0;                  /* hf_rsvd              */
    s[12] = shape;              /* hf_shape     */

    if (ioctl(0, HFTGETID, &hftgid) < 0) {
        /* perror("ioctl: HFTGETID"); */
        chno = -1;
    }
    else
        chno = hftgid.hf_chan;
    if (chno == -1) {
        /** try being moronic and just writing what I want to
                                     standard output             ****/

        if (((ioctl(2, TCGETA, &oldterm)) == -1) ||
            ((ioctl(2, TCGETA, &newterm)) == -1)) {
            perror("Getting termio");
            exit(0);
        }
        newterm.c_oflag = newterm.c_lflag = newterm.c_iflag = 0;
        newterm.c_cc[0] = -1;
        for (i = 1; i <= 5; i++)
            newterm.c_cc[i] = 0;
        if ((ioctl(2, TCSETAF, &newterm)) == -1) {
            perror("Setting to raw mode");
            exit(0);
        }
        write(2, s, 13);
        read(0, s, 1024);
        if ((ioctl(2, TCSETAF, &oldterm)) == -1) {
            perror("Resetting terminal");
            exit(0);
        }
    }
    else {
        /* open the currently active virtual terminal on the hft */
        sprintf(hftpath, "/dev/hft/%d", chno);
        if ((hftfd = open(hftpath, O_RDWR)) == -1) {
            perror("Could not open hft channel\n");
            exit(0);
        }
        write(hftfd, s, 13);
    }
}
#else

int
Cursor_shape(int shape)
{
  return shape;
}
#endif