72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include "cons.h"
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/*
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* bind a pipe onto consctl and keep reading it to
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* get changes to console state.
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*/
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Consstate*
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consctl(void)
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{
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int i, n, fd, tries;
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char buf[128];
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Consstate *x;
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char *field[10];
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x = segattach(0, "shared", 0, sizeof *x);
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if(x == (void*)-1)
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sysfatal("segattach: %r");
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/* a pipe to simulate consctl */
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if(bind("#|", "/mnt/consctl", MBEFORE) < 0
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|| bind("/mnt/consctl/data1", "/dev/consctl", MREPL) < 0)
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sysfatal("bind consctl: %r");
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/* a pipe to simulate the /dev/cons */
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if(bind("#|", "/mnt/cons", MREPL) < 0
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|| bind("/mnt/cons/data1", "/dev/cons", MREPL) < 0)
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sysfatal("bind cons: %r");
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switch(fork()){
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case -1:
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sysfatal("fork: %r");
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case 0:
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break;
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default:
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return x;
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}
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notify(0);
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for(tries = 0; tries < 100; tries++){
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x->raw = 0;
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x->hold = 0;
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fd = open("/mnt/consctl/data", OREAD);
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if(fd < 0)
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break;
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tries = 0;
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for(;;){
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n = read(fd, buf, sizeof(buf)-1);
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if(n <= 0)
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break;
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buf[n] = 0;
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n = getfields(buf, field, 10, 1, " ");
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for(i = 0; i < n; i++){
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if(strcmp(field[i], "rawon") == 0)
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x->raw = 1;
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else if(strcmp(field[i], "rawoff") == 0)
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x->raw = 0;
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else if(strcmp(field[i], "holdon") == 0)
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x->hold = 1;
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else if(strcmp(field[i], "holdoff") == 0)
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x->hold = 0;
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}
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}
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close(fd);
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}
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exits(0);
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return 0; /* dummy to keep compiler quiet*/
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}
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