1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include "cons.h"
5
6 /*
7 * bind a pipe onto consctl and keep reading it to
8 * get changes to console state.
9 */
10 Consstate*
consctl(void)11 consctl(void)
12 {
13 int i, n, fd, tries;
14 char buf[128];
15 Consstate *x;
16 char *field[10];
17
18 x = segattach(0, "shared", 0, sizeof *x);
19 if(x == (void*)-1)
20 sysfatal("segattach: %r");
21
22 /* a pipe to simulate consctl */
23 if(bind("#|", "/mnt/cons/consctl", MBEFORE) < 0
24 || bind("/mnt/cons/consctl/data1", "/dev/consctl", MREPL) < 0)
25 sysfatal("bind consctl: %r");
26
27 /* a pipe to simulate the /dev/cons */
28 if(bind("#|", "/mnt/cons/cons", MREPL) < 0
29 || bind("/mnt/cons/cons/data1", "/dev/cons", MREPL) < 0)
30 sysfatal("bind cons: %r");
31
32 switch(fork()){
33 case -1:
34 sysfatal("fork: %r");
35 case 0:
36 break;
37 default:
38 return x;
39 }
40
41 notify(0);
42
43 for(tries = 0; tries < 100; tries++){
44 x->raw = 0;
45 x->hold = 0;
46 fd = open("/mnt/cons/consctl/data", OREAD);
47 if(fd < 0)
48 break;
49 tries = 0;
50 for(;;){
51 n = read(fd, buf, sizeof(buf)-1);
52 if(n <= 0)
53 break;
54 buf[n] = 0;
55 n = getfields(buf, field, 10, 1, " ");
56 for(i = 0; i < n; i++){
57 if(strcmp(field[i], "rawon") == 0)
58 x->raw = 1;
59 else if(strcmp(field[i], "rawoff") == 0)
60 x->raw = 0;
61 else if(strcmp(field[i], "holdon") == 0)
62 x->hold = 1;
63 else if(strcmp(field[i], "holdoff") == 0)
64 x->hold = 0;
65 }
66 }
67 close(fd);
68 }
69 exits(0);
70 return 0; /* dummy to keep compiler quiet*/
71 }
72