| 18 |  |  | 
| 19 |  | static int      inp_flags; | 
| 20 |  | static int      dpd[3]; | 
| 21 | < | static int      pipesiz; | 
| 21 | > | static FILE     *dpout; | 
| 22 |  |  | 
| 23 |  |  | 
| 24 |  | disp_open(dname)                /* open the named display driver */ | 
| 25 |  | char    *dname; | 
| 26 |  | { | 
| 27 | < | char    dpath[128], *com[2]; | 
| 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] = NULL; | 
| 36 | < | pipesiz = open_process(dpd, com); | 
| 37 | < | if (pipesiz <= 0) | 
| 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(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]); | 
| 59 | + | disp_flush(); | 
| 60 |  | } | 
| 61 |  |  | 
| 62 |  |  | 
| 63 |  | disp_packet(p)                  /* display a packet */ | 
| 64 | < | register PACKET *p; | 
| 64 | > | register PACKHEAD       *p; | 
| 65 |  | { | 
| 66 | < | if (pipesiz <= 0) | 
| 50 | < | return; | 
| 51 | < | disp_result(DS_BUNDLE, sizeof(PACKHEAD) + p->nr*sizeof(RAYVAL), | 
| 52 | < | (char *)p); | 
| 66 | > | disp_result(DS_BUNDLE, packsiz(p->nr), (char *)p); | 
| 67 |  | } | 
| 68 |  |  | 
| 69 |  |  | 
| 74 |  | int     n; | 
| 75 |  | char    *buf = NULL; | 
| 76 |  |  | 
| 77 | < | if (pipesiz <= 0) | 
| 77 | > | if (dpout == NULL) | 
| 78 |  | return(-1); | 
| 79 | < | restart:                                /* check read blocking */ | 
| 79 | > | /* flush display output */ | 
| 80 | > | disp_flush(); | 
| 81 | > | /* check read blocking */ | 
| 82 |  | if (block != (inp_flags == 0)) { | 
| 83 |  | inp_flags = block ? 0 : FNONBLK; | 
| 84 |  | if (fcntl(dpd[0], F_SETFL, inp_flags) < 0) | 
| 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);              /* else acceptable failure */ | 
| 96 | > | return(2);              /* acceptable failure */ | 
| 97 |  | } | 
| 98 |  | if (msg.nbytes) {               /* get the message body */ | 
| 99 |  | buf = (char *)malloc(msg.nbytes); | 
| 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); | 
| 117 |  | bundle_set(BS_NEW, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); | 
| 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); | 
| 125 |  | bundle_set(BS_ADD, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); | 
| 126 |  | disp_result(DS_ENDIMM, 0, NULL); | 
| 127 | + | disp_check(0);          /* hack -- delete usu. follows add */ | 
| 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 | < | block = 1;              /* block on following request */ | 
| 148 | < | goto restart; | 
| 121 | < | case DR_SHUTDOWN: | 
| 147 | > | return(disp_check(1));  /* block on following request */ | 
| 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_packets(flush_queue()); | 
| 153 | + | if (end_rtrace()) | 
| 154 | + | error(WARNING, "bad status returned by rtrace"); | 
| 155 | + | } else | 
| 156 | + | error(WARNING, "no rtrace process to kill"); | 
| 157 | + | break; | 
| 158 | + | case DR_RESTART:        /* restart computation process(es) */ | 
| 159 | + | if (msg.nbytes) | 
| 160 | + | error(INTERNAL, "bad DR_RESTART from display process"); | 
| 161 | + | if (ncprocs > nprocs) { | 
| 162 | + | checkrad(); | 
| 163 | + | if (start_rtrace() < 1) | 
| 164 | + | error(WARNING, "cannot restart rtrace"); | 
| 165 | + | } else if (nprocs > 0) | 
| 166 | + | error(WARNING, "rtrace already runnning"); | 
| 167 | + | else | 
| 168 | + | error(WARNING, "holodeck not open for writing"); | 
| 169 | + | break; | 
| 170 | + | case DR_CLOBBER:        /* clobber holodeck */ | 
| 171 | + | if (msg.nbytes) | 
| 172 | + | error(INTERNAL, "bad DR_CLOBBER from display process"); | 
| 173 | + | if (!force || !ncprocs) | 
| 174 | + | error(WARNING, "request to clobber holodeck denied"); | 
| 175 | + | else { | 
| 176 | + | error(WARNING, "clobbering holodeck contents"); | 
| 177 | + | hdclobber(NULL); | 
| 178 | + | } | 
| 179 | + | break; | 
| 180 | + | case DR_SHUTDOWN:       /* shut down program */ | 
| 181 | + | if (msg.nbytes) | 
| 182 |  | error(INTERNAL, "bad DR_SHUTDOWN from display process"); | 
| 183 |  | return(0);              /* zero return signals shutdown */ | 
| 184 | + | case DR_NOOP:           /* do nothing */ | 
| 185 | + | break; | 
| 186 |  | default: | 
| 187 |  | error(INTERNAL, "unrecognized request from display process"); | 
| 188 |  | } | 
| 189 | < | if (msg.nbytes) | 
| 189 | > | if (msg.nbytes)                 /* clean up */ | 
| 190 |  | free(buf); | 
| 191 |  | return(1);                      /* normal return value */ | 
| 192 |  | fcntlerr: | 
| 201 |  | { | 
| 202 |  | int     rval; | 
| 203 |  |  | 
| 204 | < | if (pipesiz <= 0) | 
| 204 | > | if (dpout == NULL) | 
| 205 |  | return(-1); | 
| 206 |  | disp_result(DS_SHUTDOWN, 0, NULL); | 
| 207 | < | pipesiz = 0; | 
| 207 | > | fclose(dpout); | 
| 208 | > | dpout = NULL; | 
| 209 |  | return(close_process(dpd)); | 
| 210 |  | } | 
| 211 |  |  | 
| 212 |  |  | 
| 213 | < | disp_result(type, nbytes, p)    /* send result message to display process */ | 
| 213 | > | disp_result(type, nbytes, p)    /* queue result message to display process */ | 
| 214 |  | int     type, nbytes; | 
| 215 |  | char    *p; | 
| 216 |  | { | 
| 155 | – | struct iovec    iov[2]; | 
| 217 |  | MSGHEAD msg; | 
| 157 | – | int     n; | 
| 218 |  |  | 
| 219 | + | if (dpout == NULL) | 
| 220 | + | return; | 
| 221 |  | msg.type = type; | 
| 222 |  | msg.nbytes = nbytes; | 
| 223 | < | if (nbytes == 0 || sizeof(MSGHEAD)+nbytes > pipesiz) { | 
| 224 | < | n = write(dpd[1], (char *)&msg, sizeof(MSGHEAD)); | 
| 225 | < | if (n != sizeof(MSGHEAD)) | 
| 226 | < | goto writerr; | 
| 227 | < | if (nbytes > 0) { | 
| 228 | < | n = writebuf(dpd[1], p, nbytes); | 
| 229 | < | if (n != nbytes) | 
| 230 | < | goto writerr; | 
| 231 | < | } | 
| 232 | < | return; | 
| 171 | < | } | 
| 172 | < | iov[0].iov_base = (char *)&msg; | 
| 173 | < | iov[0].iov_len = sizeof(MSGHEAD); | 
| 174 | < | iov[1].iov_base = p; | 
| 175 | < | iov[1].iov_len = nbytes; | 
| 176 | < | n = writev(dpd[1], iov, 2); | 
| 177 | < | if (n == nbytes+sizeof(MSGHEAD)) | 
| 178 | < | return; | 
| 179 | < | writerr: | 
| 180 | < | error(SYSTEM, "write error in disp_result"); | 
| 223 | > | fwrite((char *)&msg, sizeof(MSGHEAD), 1, dpout); | 
| 224 | > | if (nbytes > 0) | 
| 225 | > | fwrite(p, 1, nbytes, dpout); | 
| 226 | > | } | 
| 227 | > |  | 
| 228 | > |  | 
| 229 | > | disp_flush()                    /* flush output to display */ | 
| 230 | > | { | 
| 231 | > | if (fflush(dpout) < 0) | 
| 232 | > | error(SYSTEM, "error writing to the display process"); | 
| 233 |  | } |