| 24 |
|
disp_open(dname) /* open the named display driver */ |
| 25 |
|
char *dname; |
| 26 |
|
{ |
| 27 |
< |
char dpath[128], *com[3]; |
| 27 |
> |
char dpath[128], fd0[8], fd1[8], *cmd[5]; |
| 28 |
|
int i; |
| 29 |
< |
|
| 29 |
> |
/* get full display program name */ |
| 30 |
|
#ifdef DEVPATH |
| 31 |
|
sprintf(dpath, "%s/%s%s", DEVPATH, dname, HDSUF); |
| 32 |
|
#else |
| 33 |
|
sprintf(dpath, "dev/%s%s", dname, HDSUF); |
| 34 |
|
#endif |
| 35 |
< |
com[0] = dpath; com[1] = froot; com[2] = NULL; |
| 36 |
< |
i = open_process(dpd, com); |
| 35 |
> |
/* dup stdin and stdout */ |
| 36 |
> |
if (readinp) |
| 37 |
> |
sprintf(fd0, "%d", dup(0)); |
| 38 |
> |
else |
| 39 |
> |
strcpy(fd0, "-1"); |
| 40 |
> |
sprintf(fd1, "%d", dup(1)); |
| 41 |
> |
/* start the display process */ |
| 42 |
> |
cmd[0] = dpath; |
| 43 |
> |
cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; |
| 44 |
> |
cmd[4] = NULL; |
| 45 |
> |
i = open_process(dpd, cmd); |
| 46 |
|
if (i <= 0) |
| 47 |
|
error(USER, "cannot start display process"); |
| 48 |
< |
if ((dpout = fdopen(dup(dpd[1]), "w")) == NULL) |
| 48 |
> |
if ((dpout = fdopen(dpd[1], "w")) == NULL) |
| 49 |
|
error(SYSTEM, "cannot associate FILE with display pipe"); |
| 50 |
+ |
dpd[1] = -1; /* causes ignored error in close_process() */ |
| 51 |
|
inp_flags = 0; |
| 52 |
+ |
/* close dup'ed stdin and stdout */ |
| 53 |
+ |
if (readinp) |
| 54 |
+ |
close(atoi(fd0)); |
| 55 |
+ |
close(atoi(fd1)); |
| 56 |
|
/* write out hologram grids */ |
| 57 |
|
for (i = 0; hdlist[i] != NULL; i++) |
| 58 |
|
disp_result(DS_ADDHOLO, sizeof(HDGRID), (char *)hdlist[i]); |
| 87 |
|
/* read message header */ |
| 88 |
|
n = read(dpd[0], (char *)&msg, sizeof(MSGHEAD)); |
| 89 |
|
if (n != sizeof(MSGHEAD)) { |
| 90 |
< |
if (n >= 0) |
| 90 |
> |
if (n >= 0) { |
| 91 |
> |
dpout = NULL; |
| 92 |
|
error(USER, "display process died"); |
| 93 |
+ |
} |
| 94 |
|
if (errno != EAGAIN & errno != EINTR) |
| 95 |
|
goto readerr; |
| 96 |
|
return(2); /* acceptable failure */ |
| 105 |
|
goto readerr; |
| 106 |
|
} |
| 107 |
|
switch (msg.type) { /* take appropriate action */ |
| 108 |
< |
case DR_BUNDLE: |
| 108 |
> |
case DR_BUNDLE: /* new bundle to calculate */ |
| 109 |
|
if (msg.nbytes != sizeof(PACKHEAD)) |
| 110 |
|
error(INTERNAL, "bad DR_BUNDLE from display process"); |
| 111 |
|
bundle_set(BS_ADD, (PACKHEAD *)buf, 1); |
| 112 |
|
break; |
| 113 |
< |
case DR_NEWSET: |
| 113 |
> |
case DR_NEWSET: /* new calculation set */ |
| 114 |
|
if (msg.nbytes % sizeof(PACKHEAD)) |
| 115 |
|
error(INTERNAL, "bad DR_NEWSET from display process"); |
| 116 |
|
disp_result(DS_STARTIMM, 0, NULL); |
| 118 |
|
disp_result(DS_ENDIMM, 0, NULL); |
| 119 |
|
disp_flush(); |
| 120 |
|
break; |
| 121 |
< |
case DR_ADDSET: |
| 121 |
> |
case DR_ADDSET: /* add to calculation set */ |
| 122 |
|
if (msg.nbytes % sizeof(PACKHEAD)) |
| 123 |
|
error(INTERNAL, "bad DR_ADDSET from display process"); |
| 124 |
|
disp_result(DS_STARTIMM, 0, NULL); |
| 126 |
|
disp_result(DS_ENDIMM, 0, NULL); |
| 127 |
|
disp_flush(); |
| 128 |
|
break; |
| 129 |
< |
case DR_DELSET: |
| 129 |
> |
case DR_ADJSET: /* adjust calculation set members */ |
| 130 |
|
if (msg.nbytes % sizeof(PACKHEAD)) |
| 131 |
+ |
error(INTERNAL, "bad DR_ADJSET from display process"); |
| 132 |
+ |
disp_result(DS_STARTIMM, 0, NULL); |
| 133 |
+ |
bundle_set(BS_ADJ, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
| 134 |
+ |
disp_result(DS_ENDIMM, 0, NULL); |
| 135 |
+ |
disp_flush(); |
| 136 |
+ |
break; |
| 137 |
+ |
case DR_DELSET: /* delete from calculation set */ |
| 138 |
+ |
if (msg.nbytes % sizeof(PACKHEAD)) |
| 139 |
|
error(INTERNAL, "bad DR_DELSET from display process"); |
| 140 |
|
bundle_set(BS_DEL, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
| 141 |
|
break; |
| 142 |
< |
case DR_ATTEN: |
| 142 |
> |
case DR_ATTEN: /* block for priority request */ |
| 143 |
|
if (msg.nbytes) |
| 144 |
|
error(INTERNAL, "bad DR_ATTEN from display process"); |
| 145 |
|
/* send acknowledgement */ |
| 146 |
|
disp_result(DS_ACKNOW, 0, NULL); |
| 147 |
|
return(disp_check(1)); /* block on following request */ |
| 148 |
< |
case DR_SHUTDOWN: |
| 148 |
> |
case DR_KILL: /* kill computation process(es) */ |
| 149 |
|
if (msg.nbytes) |
| 150 |
+ |
error(INTERNAL, "bad DR_KILL from display process"); |
| 151 |
+ |
if (nprocs > 0) |
| 152 |
+ |
done_rtrace(); |
| 153 |
+ |
else |
| 154 |
+ |
error(WARNING, "no rtrace process to kill"); |
| 155 |
+ |
break; |
| 156 |
+ |
case DR_RESTART: /* restart computation process(es) */ |
| 157 |
+ |
if (msg.nbytes) |
| 158 |
+ |
error(INTERNAL, "bad DR_RESTART from display process"); |
| 159 |
+ |
if (ncprocs > nprocs) |
| 160 |
+ |
new_rtrace(); |
| 161 |
+ |
else if (nprocs > 0) |
| 162 |
+ |
error(WARNING, "rtrace already runnning"); |
| 163 |
+ |
else |
| 164 |
+ |
error(WARNING, "holodeck not open for writing"); |
| 165 |
+ |
break; |
| 166 |
+ |
case DR_CLOBBER: /* clobber holodeck */ |
| 167 |
+ |
if (msg.nbytes) |
| 168 |
+ |
error(INTERNAL, "bad DR_CLOBBER from display process"); |
| 169 |
+ |
if (!force || !ncprocs) |
| 170 |
+ |
error(WARNING, "request to clobber holodeck denied"); |
| 171 |
+ |
else { |
| 172 |
+ |
error(WARNING, "clobbering holodeck contents"); |
| 173 |
+ |
hdclobber(NULL); |
| 174 |
+ |
} |
| 175 |
+ |
break; |
| 176 |
+ |
case DR_SHUTDOWN: /* shut down program */ |
| 177 |
+ |
if (msg.nbytes) |
| 178 |
|
error(INTERNAL, "bad DR_SHUTDOWN from display process"); |
| 179 |
|
return(0); /* zero return signals shutdown */ |
| 180 |
< |
case DR_NOOP: |
| 180 |
> |
case DR_NOOP: /* do nothing */ |
| 181 |
|
break; |
| 182 |
|
default: |
| 183 |
|
error(INTERNAL, "unrecognized request from display process"); |
