1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#include <u.h>
#include <termios.h>
#include <stropts.h>
#include <signal.h>
#include <libc.h>
#include "term.h"
#define debug 0
int
getpts(int fd[], char *slave)
{
void (*f)(int);
int r;
fd[1] = open("/dev/ptmx", ORDWR);
f = signal(SIGCLD, SIG_DFL);
r = grantpt(fd[1]);
signal(SIGCLD, f);
if(r < 0 || unlockpt(fd[1]) < 0)
return -1;
fchmod(fd[1], 0622);
strcpy(slave, ptsname(fd[1]));
fd[0] = open(slave, ORDWR);
if(fd[0] < 0)
sysfatal("open %s: %r\n", slave);
/* set up the right streams modules for a tty */
ioctl(fd[0], I_PUSH, "ptem"); /* push ptem */
ioctl(fd[0], I_PUSH, "ldterm"); /* push ldterm */
return 0;
}
int
childpty(int fd[], char *slave)
{
int sfd;
close(fd[1]);
setsid();
sfd = open(slave, ORDWR);
if(sfd < 0)
sysfatal("open %s: %r\n", slave);
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 TIOCSWINSZ: %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&ICANON && ttmode.c_lflag&ECHO);
}
int
getintr(int fd)
{
if(tcgetattr(fd, &ttmode) < 0)
return 0x7F;
return ttmode.c_cc[VINTR];
}
|