| 49 |
|
|
| 50 |
|
|
| 51 |
|
struct driver * |
| 52 |
< |
comm_init(argv) /* set up and execute driver */ |
| 53 |
< |
char *argv[]; |
| 52 |
> |
comm_init(dname, id) /* set up and execute driver */ |
| 53 |
> |
char *dname, *id; |
| 54 |
|
{ |
| 55 |
|
char *devname; |
| 56 |
|
int p1[2], p2[2]; |
| 57 |
< |
|
| 58 |
< |
if ((devname = getpath(argv[0], DEVPATH, 1)) == NULL) { |
| 59 |
< |
stderr_v(argv[0]); |
| 57 |
> |
char pin[16], pout[16]; |
| 58 |
> |
/* find driver program */ |
| 59 |
> |
if ((devname = getpath(dname, DEVPATH, 1)) == NULL) { |
| 60 |
> |
stderr_v(dname); |
| 61 |
|
stderr_v(": not found\n"); |
| 62 |
|
return(NULL); |
| 63 |
|
} |
| 64 |
+ |
/* open communication pipes */ |
| 65 |
|
if (pipe(p1) == -1 || pipe(p2) == -1) |
| 66 |
|
goto syserr; |
| 67 |
< |
if ((devchild = vfork()) == 0) { |
| 67 |
> |
if ((devchild = vfork()) == 0) { /* fork driver process */ |
| 68 |
|
close(p1[1]); |
| 69 |
|
close(p2[0]); |
| 70 |
< |
if (p1[0] != 0) { |
| 71 |
< |
dup2(p1[0], 0); |
| 72 |
< |
close(p1[0]); |
| 73 |
< |
} |
| 72 |
< |
if (p2[1] != 1) { |
| 73 |
< |
dup2(p2[1], 1); |
| 74 |
< |
close(p2[1]); |
| 75 |
< |
} |
| 76 |
< |
execv(devname, argv); |
| 77 |
< |
stderr_v(devname); |
| 78 |
< |
stderr_v(": cannot execute\n"); |
| 70 |
> |
sprintf(pin, "%d", p1[0]); |
| 71 |
> |
sprintf(pout, "%d", p2[1]); |
| 72 |
> |
execl(devname, dname, pin, pout, id, 0); |
| 73 |
> |
perror(devname); |
| 74 |
|
_exit(127); |
| 75 |
|
} |
| 76 |
|
if (devchild == -1) |
| 82 |
|
if ((devin = fdopen(p2[0], "r")) == NULL) |
| 83 |
|
goto syserr; |
| 84 |
|
bcopy(&comm_default, &comm_driver, sizeof(comm_driver)); |
| 85 |
+ |
/* verify & get resolution */ |
| 86 |
+ |
putw(COM_SENDM, devout); |
| 87 |
+ |
fflush(devout); |
| 88 |
+ |
if (getw(devin) != COM_RECVM) |
| 89 |
+ |
return(NULL); |
| 90 |
+ |
comm_driver.xsiz = getw(devin); |
| 91 |
+ |
comm_driver.ysiz = getw(devin); |
| 92 |
+ |
/* input handling */ |
| 93 |
|
signal(SIGIO, onsigio); |
| 94 |
< |
cmdvec = comm_comout; /* set error vectors */ |
| 94 |
> |
/* set error vectors */ |
| 95 |
> |
cmdvec = comm_comout; |
| 96 |
|
if (wrnvec != NULL) |
| 97 |
|
wrnvec = comm_comout; |
| 98 |
|
return(&comm_driver); |
| 99 |
|
syserr: |
| 100 |
< |
perror(argv[0]); |
| 100 |
> |
perror(dname); |
| 101 |
|
return(NULL); |
| 102 |
|
} |
| 103 |
|
|
| 186 |
|
if (getc(devin) != COM_COMIN) |
| 187 |
|
reply_error("comin"); |
| 188 |
|
mygets(buf, devin); |
| 189 |
< |
comm_driver.inpready = 0; |
| 189 |
> |
if (comm_driver.inpready > 0) |
| 190 |
> |
comm_driver.inpready--; |
| 191 |
|
} |
| 192 |
|
|
| 193 |
|
|
