Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <draw.h>
#include "cons.h"

/*
 *  bind a pipe onto consctl and keep reading it to
 *  get changes to console state.
 */
Consstate*
consctl(void)
{
        int i, n, fd, tries;
        char buf[128];
        Consstate *x;
        char *field[10];

        x = segattach(0, "shared", 0, sizeof *x);
        if(x == (void*)-1)
                sysfatal("segattach: %r");

        /* a pipe to simulate consctl */
        if(bind("#|", "/mnt/cons/consctl", MBEFORE) < 0
        || bind("/mnt/cons/consctl/data1", "/dev/consctl", MREPL) < 0)
                sysfatal("bind consctl: %r");

        /* a pipe to simulate the /dev/cons */
        if(bind("#|", "/mnt/cons/cons", MREPL) < 0
        || bind("/mnt/cons/cons/data1", "/dev/cons", MREPL) < 0)
                sysfatal("bind cons: %r");

        switch(fork()){
        case -1:
                sysfatal("fork: %r");
        case 0:
                break;
        default:
                return x;
        }

        notify(0);

        for(tries = 0; tries < 100; tries++){
                x->raw = 0;
                x->hold = 0;
                fd = open("/mnt/cons/consctl/data", OREAD);
                if(fd < 0)
                        break;
                tries = 0;
                for(;;){
                        n = read(fd, buf, sizeof(buf)-1);
                        if(n <= 0)
                                break;
                        buf[n] = 0;
                        n = getfields(buf, field, 10, 1, " ");
                        for(i = 0; i < n; i++){
                                if(strcmp(field[i], "rawon") == 0)
                                        x->raw = 1;
                                else if(strcmp(field[i], "rawoff") == 0)
                                        x->raw = 0;
                                else if(strcmp(field[i], "holdon") == 0)
                                        x->hold = 1;
                                else if(strcmp(field[i], "holdoff") == 0)
                                        x->hold = 0;
                        }
                }
                close(fd);
        }
        exits(0);
        return 0;               /* dummy to keep compiler quiet*/
}