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GEMini_Atari_CD-ROM_Walnut_Creek_December_1993.iso
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mntlib16.lzh
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MNTLIB16
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IOCTL.C
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1993-08-03
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107 lines
/*
* ioctl() emulation for MiNT; written by Eric R. Smith and placed
* in the public domain
*/
#include <errno.h>
#include <mintbind.h>
#include <ioctl.h>
#include <fcntl.h> /* for __open_stat */
#include <unistd.h>
#include <linea.h> /* for TIOCGWINSZ under TOS */
extern int __mint; /* MiNT version */
int _ttydisc = NTTYDISC;
int _ldisc = LLITOUT;
/* in read.c */
extern struct tchars __tchars;
extern struct ltchars __ltchars;
int ioctl(fd, cmd, arg)
int fd, cmd;
void *arg;
{
long r;
int istty = isatty(fd);
struct sgttyb *sg = arg;
if (istty) {
if (cmd == TIOCGETD) {
*((int *)arg) = _ttydisc;
return 0;
} else if (cmd == TIOCSETD) {
_ttydisc = *((int *)arg);
return 0;
} else if (cmd == TIOCLGET) {
*((int *)arg) = _ldisc;
return 0;
} else if (cmd == TIOCLSET) {
_ldisc = *((int *)arg);
return 0;
} else if (cmd == TIOCSWINSZ && __mint < 9) {
return 0;
} else if (cmd == TIOCGWINSZ && __mint < 9) {
struct winsize *win = (struct winsize *)arg;
(void)linea0();
win->ws_row = V_CEL_MY + 1;
win->ws_col = V_CEL_MX + 1;
win->ws_xpixel = V_X_MAX;
win->ws_ypixel = V_Y_MAX;
return 0;
}
}
if (__mint) {
r = Fcntl(fd, arg, cmd);
}
else if (istty) {
r = 0;
switch(cmd) {
case TIOCSETP:
fd = __OPEN_INDEX(fd);
if (fd < 0 || fd >= __NHANDLES)
fd = __NHANDLES - 1;
__open_stat[fd].flags = sg->sg_flags;
break;
case TIOCGETP:
fd = __OPEN_INDEX(fd);
if (fd < 0 || fd >= __NHANDLES)
fd = __NHANDLES - 1;
sg->sg_flags = __open_stat[fd].flags;
sg->sg_ispeed = sg->sg_ospeed = 0;
sg->sg_erase = 'H' & 0x1f;
sg->sg_kill = 'U' & 0x1f;
break;
case TIOCGETC:
*((struct tchars *)arg) = __tchars;
break;
case TIOCSETC:
__tchars = *((struct tchars *)arg);
break;
case TIOCGLTC:
*((struct ltchars *)arg) = __ltchars;
break;
case TIOCSLTC:
__ltchars = *((struct ltchars *)arg);
break;
case TIOCGPGRP:
*((long *)arg) = 0;
break;
case TIOCSPGRP:
break;
default:
r = -EINVAL;
}
}
else
r = -EINVAL;
if (r < 0) {
errno = -r;
return -1;
}
return r;
}