9e0d3750c5
Change-Id: Ifcef0636ee1e1fd0f9b06a8d1a99d58fae831318 Reviewed-on: https://plan9port-review.googlesource.com/2780 Reviewed-by: Russ Cox <rsc@swtch.com>
114 lines
2 KiB
C
114 lines
2 KiB
C
#include <u.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <grp.h>
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#include <termios.h>
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#include <sys/termios.h>
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#ifdef __linux__
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#include <pty.h>
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#endif
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#include <fcntl.h>
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#include <libc.h>
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#include <draw.h>
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#include "term.h"
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#define debug 0
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static char *abc =
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"0123456789";
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static char *_123 =
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"0123456789"
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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int
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getpts(int fd[], char *slave)
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{
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char *a, *z;
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char pty[] = "/dev/ptyXX";
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for(a=abc; *a; a++)
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for(z=_123; *z; z++){
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pty[8] = *a;
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pty[9] = *z;
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if((fd[1] = open(pty, ORDWR)) < 0){
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if(errno == ENOENT)
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break;
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}else{
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fchmod(fd[1], 0620);
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strcpy(slave, pty);
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slave[5] = 't';
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if((fd[0] = open(slave, ORDWR)) >= 0)
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return 0;
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close(fd[1]);
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}
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}
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sysfatal("no ptys");
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return 0;
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}
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int
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childpty(int fd[], char *slave)
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{
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int sfd;
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close(fd[1]); /* drop master */
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setsid();
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sfd = open(slave, ORDWR);
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if(sfd < 0)
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sysfatal("child open %s: %r\n", slave);
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if(ioctl(sfd, TIOCSCTTY, 0) < 0)
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fprint(2, "ioctl TIOCSCTTY: %r\n");
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return sfd;
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}
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struct winsize ows;
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void
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updatewinsize(int row, int col, int dx, int dy)
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{
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struct winsize ws;
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ws.ws_row = row;
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ws.ws_col = col;
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ws.ws_xpixel = dx;
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needdisplay(); // in case this is 'win' and not 9term
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// Leave "is this a hidpi display" in the low bit of the ypixel height for mc.
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dy &= ~1;
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if(display != nil && display->dpi >= DefaultDPI*3/2)
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dy |= 1;
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ws.ws_ypixel = dy;
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if(ws.ws_row != ows.ws_row || ws.ws_col != ows.ws_col){
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if(ioctl(rcfd, TIOCSWINSZ, &ws) < 0)
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fprint(2, "ioctl: %r\n");
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}
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ows = ws;
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}
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static struct termios ttmode;
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int
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isecho(int fd)
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{
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if(tcgetattr(fd, &ttmode) < 0)
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fprint(2, "tcgetattr: %r\n");
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if(debug) fprint(2, "israw %c%c\n",
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ttmode.c_lflag&ICANON ? 'c' : '-',
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ttmode.c_lflag&ECHO ? 'e' : '-');
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return ttmode.c_lflag&ECHO;
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}
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int
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getintr(int fd)
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{
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if(tcgetattr(fd, &ttmode) < 0)
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return 0x7F;
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return ttmode.c_cc[VINTR];
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}
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