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#include <u.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <errno.h>
#include <grp.h>
#include <termios.h>
#include <sys/termios.h>
#ifdef __linux__
#include <pty.h>
#endif
#include <fcntl.h>
#include <libc.h>
#include "term.h"
#define debug 0
static char *abc =
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789";
static char *_123 =
"0123456789"
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int
getpts(int fd[], char *slave)
{
char *a, *z;
char pty[] = "/dev/ptyXX";
for(a=abc; *a; a++)
for(z=_123; *z; z++){
pty[8] = *a;
pty[9] = *z;
if((fd[1] = open(pty, ORDWR)) < 0){
if(errno == ENOENT)
break;
}else{
fchmod(fd[1], 0620);
strcpy(slave, pty);
slave[5] = 't';
if((fd[0] = open(slave, ORDWR)) >= 0)
return 0;
close(fd[1]);
}
}
sysfatal("no ptys");
return 0;
}
int
childpty(int fd[], char *slave)
{
int sfd;
close(fd[1]); /* drop master */
setsid();
sfd = open(slave, ORDWR);
if(sfd < 0)
sysfatal("child open %s: %r\n", slave);
if(ioctl(sfd, TIOCSCTTY, 0) < 0)
fprint(2, "ioctl TIOCSCTTY: %r\n");
return sfd;
}
struct winsize ows;
void
updatewinsize(int row, int col, int dx, int dy)
{
struct winsize ws;
ws.ws_row = row;
ws.ws_col = col;
ws.ws_xpixel = dx;
ws.ws_ypixel = dy;
if(ws.ws_row != ows.ws_row || ws.ws_col != ows.ws_col){
if(ioctl(rcfd, TIOCSWINSZ, &ws) < 0)
fprint(2, "ioctl: %r\n");
}
ows = ws;
}
static struct termios ttmode;
int
isecho(int fd)
{
if(tcgetattr(fd, &ttmode) < 0)
fprint(2, "tcgetattr: %r\n");
if(debug) fprint(2, "israw %c%c\n",
ttmode.c_lflag&ICANON ? 'c' : '-',
ttmode.c_lflag&ECHO ? 'e' : '-');
return ttmode.c_lflag&ECHO;
}
int
setecho(int fd, int newe)
{
int old;
if(tcgetattr(fd, &ttmode) < 0)
fprint(2, "tcgetattr: %r\n");
old = ttmode.c_lflag & ECHO;
if(old != newe){
ttmode.c_lflag &= ~ECHO;
ttmode.c_lflag |= newe;
/*
* I tried using TCSADRAIN here, but that causes
* hangs if there is any output waiting for us.
* I guess TCSADRAIN is intended for use by our
* clients, not by us.
*/
if(tcsetattr(fd, 0, &ttmode) < 0)
fprint(2, "tcsetattr: %r\n");
}
return old;
}
int
getintr(int fd)
{
if(tcgetattr(fd, &ttmode) < 0)
return 0x7F;
return ttmode.c_cc[VINTR];
}
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