1 #include <u.h>
2 #include <sys/types.h>
3 #include <sys/ioctl.h>
4 #include <sys/stat.h>
5 #include <errno.h>
6 #include <grp.h>
7 #include <termios.h>
8 #ifdef HAS_SYS_TERMIOS
9 #include <sys/termios.h>
10 #endif
11 #ifdef __linux__
12 #include <pty.h>
13 #endif
14 #include <fcntl.h>
15 #include <libc.h>
16 #include <draw.h>
17 #include "term.h"
18 
19 #define debug 0
20 
21 static char *abc =
22 	"abcdefghijklmnopqrstuvwxyz"
23 	"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
24 	"0123456789";
25 static char *_123 =
26 	"0123456789"
27 	"abcdefghijklmnopqrstuvwxyz"
28 	"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
29 
30 int
31 getpts(int fd[], char *slave)
32 {
33 	char *a, *z;
34 	char pty[] = "/dev/ptyXX";
35 
36 	for(a=abc; *a; a++)
37 	for(z=_123; *z; z++){
38 		pty[8] = *a;
39 		pty[9] = *z;
40 		if((fd[1] = open(pty, ORDWR)) < 0){
41 			if(errno == ENOENT)
42 				break;
43 		}else{
44 			fchmod(fd[1], 0620);
45 			strcpy(slave, pty);
46 			slave[5] = 't';
47 			if((fd[0] = open(slave, ORDWR)) >= 0)
48 				return 0;
49 			close(fd[1]);
50 		}
51 	}
52 	sysfatal("no ptys");
53 	return 0;
54 }
55 
56 int
57 childpty(int fd[], char *slave)
58 {
59 	int sfd;
60 
61 	close(fd[1]);	/* drop master */
62 	setsid();
63 	sfd = open(slave, ORDWR);
64 	if(sfd < 0)
65 		sysfatal("child open %s: %r\n", slave);
66 #if !defined (__AIX__)
67 	if(ioctl(sfd, TIOCSCTTY, 0) < 0)
68 		fprint(2, "ioctl TIOCSCTTY: %r\n");
69 #endif
70 	return sfd;
71 }
72 
73 struct winsize ows;
74 
75 void
76 updatewinsize(int row, int col, int dx, int dy)
77 {
78 	struct winsize ws;
79 
80 	ws.ws_row = row;
81 	ws.ws_col = col;
82 	ws.ws_xpixel = dx;
83 
84 	needdisplay(); // in case this is 'win' and not 9term
85 	// Leave "is this a hidpi display" in the low bit of the ypixel height for mc.
86 	dy &= ~1;
87 	if(display != nil && display->dpi >= DefaultDPI*3/2)
88 		dy |= 1;
89 	ws.ws_ypixel = dy;
90 
91 	if(ws.ws_row != ows.ws_row || ws.ws_col != ows.ws_col){
92 		if(ioctl(rcfd, TIOCSWINSZ, &ws) < 0)
93 			fprint(2, "ioctl: %r\n");
94 	}
95 	ows = ws;
96 }
97 
98 static struct termios ttmode;
99 
100 int
101 isecho(int fd)
102 {
103 	if(tcgetattr(fd, &ttmode) < 0)
104 		fprint(2, "tcgetattr: %r\n");
105 	if(debug) fprint(2, "israw %c%c\n",
106 		ttmode.c_lflag&ICANON ? 'c' : '-',
107 		ttmode.c_lflag&ECHO ? 'e' : '-');
108 	return ttmode.c_lflag&ECHO;
109 }
110 
111 int
112 getintr(int fd)
113 {
114 	if(tcgetattr(fd, &ttmode) < 0)
115 		return 0x7F;
116 	return ttmode.c_cc[VINTR];
117 }