1 ebb4c247 2004-04-16 devnull #include <u.h>
  2 b4a659b6 2004-04-19 devnull #include <sys/types.h>
  3 67e4fce4 2004-04-19 devnull #include <sys/ioctl.h>
  4 b4a659b6 2004-04-19 devnull #include <sys/stat.h>
  5 ebb4c247 2004-04-16 devnull #include <errno.h>
  6 ebb4c247 2004-04-16 devnull #include <grp.h>
  7 ebb4c247 2004-04-16 devnull #include <termios.h>
  8 ebb4c247 2004-04-16 devnull #include <sys/termios.h>
  9 b4a659b6 2004-04-19 devnull #ifdef __linux__
 10 ebb4c247 2004-04-16 devnull #include <pty.h>
 11 b4a659b6 2004-04-19 devnull #endif
 12 ebb4c247 2004-04-16 devnull #include <fcntl.h>
 13 ebb4c247 2004-04-16 devnull #include <libc.h>
 14 ebb4c247 2004-04-16 devnull #include "term.h"
 15 ebb4c247 2004-04-16 devnull 
 16 ebb4c247 2004-04-16 devnull #define debug 0
 17 ebb4c247 2004-04-16 devnull 
 18 ebb4c247 2004-04-16 devnull static char *abc =
 19 ebb4c247 2004-04-16 devnull 	"abcdefghijklmnopqrstuvwxyz"
 20 ebb4c247 2004-04-16 devnull 	"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 21 ebb4c247 2004-04-16 devnull 	"0123456789";
 22 ebb4c247 2004-04-16 devnull static char *_123 = 
 23 ebb4c247 2004-04-16 devnull 	"0123456789"
 24 ebb4c247 2004-04-16 devnull 	"abcdefghijklmnopqrstuvwxyz"
 25 ebb4c247 2004-04-16 devnull 	"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 26 ebb4c247 2004-04-16 devnull 
 27 ebb4c247 2004-04-16 devnull int
 28 ebb4c247 2004-04-16 devnull getpts(int fd[], char *slave)
 29 ebb4c247 2004-04-16 devnull {
 30 ebb4c247 2004-04-16 devnull 	char *a, *z;
 31 ebb4c247 2004-04-16 devnull 	char pty[] = "/dev/ptyXX";
 32 ebb4c247 2004-04-16 devnull 
 33 ebb4c247 2004-04-16 devnull 	for(a=abc; *a; a++)
 34 ebb4c247 2004-04-16 devnull 	for(z=_123; *z; z++){
 35 ebb4c247 2004-04-16 devnull 		pty[8] = *a;
 36 ebb4c247 2004-04-16 devnull 		pty[9] = *z;
 37 ebb4c247 2004-04-16 devnull 		if((fd[1] = open(pty, ORDWR)) < 0){
 38 ebb4c247 2004-04-16 devnull 			if(errno == ENOENT)
 39 ebb4c247 2004-04-16 devnull 				break;
 40 ebb4c247 2004-04-16 devnull 		}else{
 41 ebb4c247 2004-04-16 devnull 			fchmod(fd[1], 0620);
 42 ebb4c247 2004-04-16 devnull 			strcpy(slave, pty);
 43 ebb4c247 2004-04-16 devnull 			slave[5] = 't';
 44 ebb4c247 2004-04-16 devnull 			if((fd[0] = open(slave, ORDWR)) >= 0)
 45 ebb4c247 2004-04-16 devnull 				return 0;
 46 ebb4c247 2004-04-16 devnull 			close(fd[1]);
 47 ebb4c247 2004-04-16 devnull 		}
 48 ebb4c247 2004-04-16 devnull 	}
 49 ebb4c247 2004-04-16 devnull 	sysfatal("no ptys");
 50 ebb4c247 2004-04-16 devnull 	return 0;
 51 ebb4c247 2004-04-16 devnull }
 52 ebb4c247 2004-04-16 devnull 
 53 ebb4c247 2004-04-16 devnull int
 54 ebb4c247 2004-04-16 devnull childpty(int fd[], char *slave)
 55 ebb4c247 2004-04-16 devnull {
 56 ebb4c247 2004-04-16 devnull 	int sfd;
 57 ebb4c247 2004-04-16 devnull 
 58 ebb4c247 2004-04-16 devnull 	close(fd[1]);	/* drop master */
 59 ebb4c247 2004-04-16 devnull 	setsid();
 60 ebb4c247 2004-04-16 devnull 	sfd = open(slave, ORDWR);
 61 ebb4c247 2004-04-16 devnull 	if(sfd < 0)
 62 ebb4c247 2004-04-16 devnull 		sysfatal("child open %s: %r\n", slave);
 63 ebb4c247 2004-04-16 devnull 	if(ioctl(sfd, TIOCSCTTY, 0) < 0)
 64 ebb4c247 2004-04-16 devnull 		fprint(2, "ioctl TIOCSCTTY: %r\n");
 65 ebb4c247 2004-04-16 devnull 	return sfd;
 66 ebb4c247 2004-04-16 devnull }
 67 ebb4c247 2004-04-16 devnull 
 68 ebb4c247 2004-04-16 devnull struct winsize ows;
 69 ebb4c247 2004-04-16 devnull 
 70 ebb4c247 2004-04-16 devnull void
 71 ebb4c247 2004-04-16 devnull updatewinsize(int row, int col, int dx, int dy)
 72 ebb4c247 2004-04-16 devnull {
 73 ebb4c247 2004-04-16 devnull 	struct winsize ws;
 74 ebb4c247 2004-04-16 devnull 
 75 ebb4c247 2004-04-16 devnull 	ws.ws_row = row;
 76 ebb4c247 2004-04-16 devnull 	ws.ws_col = col;
 77 ebb4c247 2004-04-16 devnull 	ws.ws_xpixel = dx;
 78 ebb4c247 2004-04-16 devnull 	ws.ws_ypixel = dy;
 79 ebb4c247 2004-04-16 devnull 	if(ws.ws_row != ows.ws_row || ws.ws_col != ows.ws_col)
 80 ebb4c247 2004-04-16 devnull 	if(ioctl(rcfd, TIOCSWINSZ, &ws) < 0)
 81 ebb4c247 2004-04-16 devnull 		fprint(2, "ioctl: %r\n");
 82 ebb4c247 2004-04-16 devnull 	ows = ws;
 83 ebb4c247 2004-04-16 devnull }
 84 ebb4c247 2004-04-16 devnull 
 85 ebb4c247 2004-04-16 devnull static struct termios ttmode;
 86 ebb4c247 2004-04-16 devnull 
 87 ebb4c247 2004-04-16 devnull int
 88 ebb4c247 2004-04-16 devnull isecho(int fd)
 89 ebb4c247 2004-04-16 devnull {
 90 ebb4c247 2004-04-16 devnull 	if(tcgetattr(fd, &ttmode) < 0)
 91 ebb4c247 2004-04-16 devnull 		fprint(2, "tcgetattr: %r\n");
 92 ebb4c247 2004-04-16 devnull 	if(debug) fprint(2, "israw %c%c\n",
 93 ebb4c247 2004-04-16 devnull 		ttmode.c_lflag&ICANON ? 'c' : '-',
 94 ebb4c247 2004-04-16 devnull 		ttmode.c_lflag&ECHO ? 'e' : '-');
 95 ebb4c247 2004-04-16 devnull 	return ttmode.c_lflag&ECHO;
 96 ebb4c247 2004-04-16 devnull }
 97 ebb4c247 2004-04-16 devnull 
 98 ebb4c247 2004-04-16 devnull int
 99 ebb4c247 2004-04-16 devnull setecho(int fd, int newe)
100 ebb4c247 2004-04-16 devnull {
101 ebb4c247 2004-04-16 devnull 	int old;
102 ebb4c247 2004-04-16 devnull 
103 ebb4c247 2004-04-16 devnull 	if(tcgetattr(fd, &ttmode) < 0)
104 ebb4c247 2004-04-16 devnull 		fprint(2, "tcgetattr: %r\n");
105 ebb4c247 2004-04-16 devnull 	old = ttmode.c_lflag & ECHO;
106 ebb4c247 2004-04-16 devnull 	if(old != newe){
107 ebb4c247 2004-04-16 devnull 		ttmode.c_lflag &= ~ECHO;
108 ebb4c247 2004-04-16 devnull 		ttmode.c_lflag |= newe;
109 99c75f3c 2004-04-20 devnull 		/*
110 99c75f3c 2004-04-20 devnull 		 * I tried using TCSADRAIN here, but that causes
111 99c75f3c 2004-04-20 devnull 		 * hangs if there is any output waiting for us.
112 99c75f3c 2004-04-20 devnull 		 * I guess TCSADRAIN is intended for use by our
113 99c75f3c 2004-04-20 devnull 		 * clients, not by us.
114 99c75f3c 2004-04-20 devnull 		 */
115 99c75f3c 2004-04-20 devnull 		if(tcsetattr(fd, 0, &ttmode) < 0)
116 ebb4c247 2004-04-16 devnull 			fprint(2, "tcsetattr: %r\n");
117 ebb4c247 2004-04-16 devnull 	}
118 ebb4c247 2004-04-16 devnull 	return old;
119 ebb4c247 2004-04-16 devnull }