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1.1 ! root 1: /* ! 2: * ! 3: * postio - RS-232 serial interface for PostScript printers ! 4: * ! 5: * A simple program that manages input and output for PostScript printers. Much ! 6: * has been added and changed from early versions of the program, but the basic ! 7: * philosophy is still the same. Don't send real data until we're certain we've ! 8: * connected to a PostScript printer that's in the idle state and try to hold the ! 9: * connection until the job is completely done. It's more work than you might ! 10: * expect is necessary, but should provide a reasonably reliable spooler interface ! 11: * that can return error indications to the caller via the program's exit status. ! 12: * ! 13: * I've added code that will let you split the program into separate read/write ! 14: * processes. Although it's not the default it should be useful if you have a file ! 15: * that will be returning useful data from the printer. The two process stuff was ! 16: * laid down on top of the single process code and both methods still work. The ! 17: * implementation isn't as good as it could be, but didn't require many changes ! 18: * to the original program (despite the fact that there are now many differences). ! 19: * ! 20: * By default the program still runs as a single process. The -R2 option forces ! 21: * separate read and write processes after the intial connection is made. If you ! 22: * want that as the default initialize splitme (below) to TRUE. In addition the ! 23: * -t option that's used to force stuff not recognized as status reports to stdout ! 24: * also tries to run as two processes (by setting splitme to TRUE). It will only ! 25: * work if the required code (ie. resetline() in ifdef.c) has been implemented ! 26: * for your Unix system. I've only tested the System V code. ! 27: * ! 28: * Code needed to support interactive mode has also been added, although again it's ! 29: * not as efficient as it could be. It depends on the system dependent procedures ! 30: * resetline() and setupstdin() (file ifdef.c) and for now is only guaranteed to ! 31: * work on System V. Can be requested using the -i option. ! 32: * ! 33: * Quiet mode (-q option) is also new, but was needed for some printers connected ! 34: * to RADIAN. If you're running in quiet mode no status requests will be sent to ! 35: * the printer while files are being transmitted (ie. in send()). ! 36: * ! 37: * The program expects to receive printer status lines that look like, ! 38: * ! 39: * %%[ status: idle; source: serial 25 ]%% ! 40: * %%[ status: waiting; source: serial 25 ]%% ! 41: * %%[ status: initializing; source: serial 25 ]%% ! 42: * %%[ status: busy; source: serial 25 ]%% ! 43: * %%[ status: printing; source: serial 25 ]%% ! 44: * %%[ status: PrinterError: out of paper; source: serial 25 ]%% ! 45: * %%[ status: PrinterError: no paper tray; source: serial 25 ]%% ! 46: * ! 47: * although this list isn't complete. Sending a '\024' (control T) character forces ! 48: * the return of a status report. PostScript errors detected on the printer result ! 49: * in the immediate transmission of special error messages that look like, ! 50: * ! 51: * %%[ Error: undefined; OffendingCommand: xxx ]%% ! 52: * %%[ Flushing: rest of job (to end-of-file) will be ignored ]%% ! 53: * ! 54: * although we only use the Error and Flushing keywords. Finally conditions, like ! 55: * being out of paper, result in other messages being sent back from the printer ! 56: * over the communications line. Typical PrinterError messages look like, ! 57: * ! 58: * %%[ PrinterError: out of paper; source: serial 25 ]%% ! 59: * %%[ PrinterError: paper jam; source: serial 25 ]%% ! 60: * ! 61: * although we only use the PrinterError keyword rather than trying to recognize ! 62: * all possible printer errors. ! 63: * ! 64: * The implications of using one process and only flow controlling data going to ! 65: * the printer are obvious. Job transmission should be reliable, but there can be ! 66: * data loss in stuff sent back from the printer. Usually that only caused problems ! 67: * with jobs designed to run on the printer and return useful data back over the ! 68: * communications line. If that's the kind of job you're sending call postio with ! 69: * the -t option. That should force the program to split into separate read and ! 70: * write processes and everything not bracketed by "%%[ " and " ]%%" strings goes ! 71: * to stdout. In otherwords the data you're expecting should be separated from the ! 72: * status stuff that goes to the log file (or stderr). The -R2 option does almost ! 73: * the same thing (ie. separate read and write processes), but everything that ! 74: * comes back from the printer goes to the log file (stderr by default) and you'll ! 75: * have to separate your data from any printer messages. ! 76: * ! 77: * A typical command line might be, ! 78: * ! 79: * postio -l /dev/tty01 -b 9600 -L log file1 file2 ! 80: * ! 81: * where -l selects the line, -b sets the baud rate, and -L selects the printer ! 82: * log file. Since there's no default line, at least not right now, you'll always ! 83: * need to use the -l option, and if you don't choose a log file stderr will be ! 84: * used. If you have a program that will be returning data the command line might ! 85: * look like, ! 86: * ! 87: * postio -t -l/dev/tty01 -b9600 -Llog file >results ! 88: * ! 89: * Status stuff goes to file log while the data you're expecting back from the ! 90: * printer gets put in file results. ! 91: * ! 92: */ ! 93: ! 94: #include <stdio.h> ! 95: #include <ctype.h> ! 96: #include <fcntl.h> ! 97: #include <signal.h> ! 98: #include <sys/types.h> ! 99: #include <errno.h> ! 100: ! 101: #include "ifdef.h" /* conditional compilation stuff */ ! 102: #include "gen.h" /* general purpose definitions */ ! 103: #include "postio.h" /* some special definitions */ ! 104: ! 105: char **argv; /* global so everyone can use them */ ! 106: int argc; ! 107: ! 108: char *prog_name = ""; /* really just for error messages */ ! 109: int x_stat = 0; /* program exit status */ ! 110: int debug = OFF; /* debug flag */ ! 111: int ignore = OFF; /* what's done for FATAL errors */ ! 112: ! 113: char *line = NULL; /* printer is on this tty line */ ! 114: short baudrate = BAUDRATE; /* and running at this baud rate */ ! 115: Baud baudtable[] = BAUDTABLE; /* converts strings to termio values */ ! 116: ! 117: int stopbits = 1; /* number of stop bits */ ! 118: int tostdout = FALSE; /* non-status stuff goes to stdout? */ ! 119: int quiet = FALSE; /* no status queries in send() if TRUE */ ! 120: int interactive = FALSE; /* interactive mode */ ! 121: char *postbegin = POSTBEGIN; /* preceeds all the input files */ ! 122: int useslowsend = FALSE; /* not recommended! */ ! 123: int sendctrlC = TRUE; /* interrupt with ctrl-C when BUSY */ ! 124: ! 125: char *block = NULL; /* input file buffer */ ! 126: int blocksize = BLOCKSIZE; /* and its size in bytes */ ! 127: int head = 0; /* block[head] is the next character */ ! 128: int tail = 0; /* one past the last byte in block[] */ ! 129: ! 130: int splitme = FALSE; /* into READ and WRITE processes if TRUE */ ! 131: int whatami = READWRITE; /* a READ or WRITE process - or both */ ! 132: int canread = TRUE; /* allow reads */ ! 133: int canwrite = TRUE; /* and writes if TRUE */ ! 134: int otherpid = -1; /* who gets signals if greater than 1 */ ! 135: int joinsig = SIGTRAP; /* reader gets this when writing is done */ ! 136: int writedone = FALSE; /* and then sets this to TRUE */ ! 137: ! 138: char mesg[MESGSIZE]; /* exactly what came back on ttyi */ ! 139: char sbuf[MESGSIZE]; /* for parsing the message */ ! 140: int next = 0; /* next character goes in mesg[next] */ ! 141: char *mesgptr = NULL; /* printer message starts here in mesg[] */ ! 142: char *endmesg = NULL; /* as far as readline() can go in mesg[] */ ! 143: ! 144: Status status[] = STATUS; /* for converting status strings */ ! 145: int nostatus = NOSTATUS; /* default getstatus() return value */ ! 146: ! 147: int currentstate = NOTCONNECTED; /* what's happening START, SEND, or DONE */ ! 148: ! 149: int ttyi = 0; /* input */ ! 150: int ttyo = 2; /* and output file descriptors */ ! 151: ! 152: FILE *fp_log = stderr; /* log file for stuff from the printer */ ! 153: ! 154: /*****************************************************************************/ ! 155: ! 156: main(agc, agv) ! 157: ! 158: int agc; ! 159: char *agv[]; ! 160: ! 161: { ! 162: ! 163: /* ! 164: * ! 165: * A simple program that manages input and output for PostScript printers. Can run ! 166: * as a single process or as separate read/write processes. What's done depends on ! 167: * the value assigned to splitme when split() is called. ! 168: * ! 169: */ ! 170: ! 171: argc = agc; /* other routines may want them */ ! 172: argv = agv; ! 173: ! 174: prog_name = argv[0]; /* really just for error messages */ ! 175: ! 176: init_signals(); /* sets up interrupt handling */ ! 177: options(); /* get command line options */ ! 178: initialize(); /* must be done after options() */ ! 179: start(); /* make sure the printer is ready */ ! 180: split(); /* into read/write processes - maybe */ ! 181: arguments(); /* then send each input file */ ! 182: done(); /* wait until the printer is finished */ ! 183: cleanup(); /* make sure the write process stops */ ! 184: ! 185: exit(x_stat); /* everything probably went OK */ ! 186: ! 187: } /* End of main */ ! 188: ! 189: /*****************************************************************************/ ! 190: ! 191: init_signals() ! 192: ! 193: { ! 194: ! 195: void interrupt(); /* handles them if we catch signals */ ! 196: ! 197: /* ! 198: * ! 199: * Makes sure we handle interrupts. The proper way to kill the program, if ! 200: * necessary, is to do a kill -15. That forces a call to interrupt(), which in ! 201: * turn tries to reset the printer and then exits with a non-zero status. If the ! 202: * program is running as two processes, sending SIGTERM to either the parent or ! 203: * child should clean things up. ! 204: * ! 205: */ ! 206: ! 207: if ( signal(SIGINT, interrupt) == SIG_IGN ) { ! 208: signal(SIGINT, SIG_IGN); ! 209: signal(SIGQUIT, SIG_IGN); ! 210: signal(SIGHUP, SIG_IGN); ! 211: } else { ! 212: signal(SIGHUP, interrupt); ! 213: signal(SIGQUIT, interrupt); ! 214: } /* End else */ ! 215: ! 216: signal(SIGTERM, interrupt); ! 217: ! 218: } /* End of init_sig */ ! 219: ! 220: /*****************************************************************************/ ! 221: ! 222: options() ! 223: ! 224: { ! 225: ! 226: int ch; /* return value from getopt() */ ! 227: char *optnames = "b:cil:qs:tB:L:P:R:SDI"; ! 228: ! 229: extern char *optarg; /* used by getopt() */ ! 230: extern int optind; ! 231: ! 232: /* ! 233: * ! 234: * Reads and processes the command line options. The -R2, -t, and -i options all ! 235: * force separate read and write processes by eventually setting splitme to TRUE ! 236: * (check initialize()). The -S option is not recommended and should only be used ! 237: * as a last resort! ! 238: * ! 239: */ ! 240: ! 241: while ( (ch = getopt(argc, argv, optnames)) != EOF ) { ! 242: switch ( ch ) { ! 243: case 'b': /* baud rate string */ ! 244: baudrate = getbaud(optarg); ! 245: break; ! 246: ! 247: case 'c': /* no ctrl-C's */ ! 248: sendctrlC = FALSE; ! 249: break; ! 250: ! 251: case 'i': /* interactive mode */ ! 252: interactive = TRUE; ! 253: break; ! 254: ! 255: case 'l': /* printer line */ ! 256: line = optarg; ! 257: break; ! 258: ! 259: case 'q': /* no status queries - for RADIAN? */ ! 260: quiet = TRUE; ! 261: break; ! 262: ! 263: case 's': /* use 2 stop bits - for UNISON? */ ! 264: if ( (stopbits = atoi(optarg)) < 1 || stopbits > 2 ) ! 265: stopbits = 1; ! 266: break; ! 267: ! 268: case 't': /* non-status stuff goes to stdout */ ! 269: tostdout = TRUE; ! 270: break; ! 271: ! 272: case 'B': /* set the job buffer size */ ! 273: if ( (blocksize = atoi(optarg)) <= 0 ) ! 274: blocksize = BLOCKSIZE; ! 275: break; ! 276: ! 277: case 'L': /* printer log file */ ! 278: if ( (fp_log = fopen(optarg, "w")) == NULL ) { ! 279: fp_log = stderr; ! 280: error(NON_FATAL, "can't open log file %s", optarg); ! 281: } /* End if */ ! 282: break; ! 283: ! 284: case 'P': /* initial PostScript code */ ! 285: postbegin = optarg; ! 286: break; ! 287: ! 288: case 'R': /* run as one or two processes */ ! 289: if ( atoi(optarg) == 2 ) ! 290: splitme = TRUE; ! 291: else splitme = FALSE; ! 292: break; ! 293: ! 294: case 'S': /* slow and kludged up version of send */ ! 295: useslowsend = TRUE; ! 296: break; ! 297: ! 298: case 'D': /* debug flag */ ! 299: debug = ON; ! 300: break; ! 301: ! 302: case 'I': /* ignore FATAL errors */ ! 303: ignore = ON; ! 304: break; ! 305: ! 306: case '?': /* don't understand the option */ ! 307: error(FATAL, ""); ! 308: break; ! 309: ! 310: default: /* don't know what to do for ch */ ! 311: error(FATAL, "missing case for option %c\n", ch); ! 312: break; ! 313: } /* End switch */ ! 314: } /* End while */ ! 315: ! 316: argc -= optind; /* get ready for non-option args */ ! 317: argv += optind; ! 318: ! 319: } /* End of options */ ! 320: ! 321: /*****************************************************************************/ ! 322: ! 323: getbaud(rate) ! 324: ! 325: char *rate; /* string representing the baud rate */ ! 326: ! 327: { ! 328: ! 329: int i; /* for looking through baudtable[] */ ! 330: ! 331: /* ! 332: * ! 333: * Called from options() to convert a baud rate string into an appropriate termio ! 334: * value. *rate is looked up in baudtable[] and if it's found, the corresponding ! 335: * value is returned to the caller. ! 336: * ! 337: */ ! 338: ! 339: for ( i = 0; baudtable[i].rate != NULL; i++ ) ! 340: if ( strcmp(rate, baudtable[i].rate) == 0 ) ! 341: return(baudtable[i].val); ! 342: ! 343: error(FATAL, "don't recognize baud rate %s", rate); ! 344: ! 345: } /* End of getbaud */ ! 346: ! 347: /*****************************************************************************/ ! 348: ! 349: initialize() ! 350: ! 351: { ! 352: ! 353: /* ! 354: * ! 355: * Initialization, a few checks, and a call to setupline() (file ifdef.c) to open ! 356: * and configure the communications line. Settings for interactive mode always ! 357: * take precedence. The setupstdin() call with an argument of 0 saves the current ! 358: * terminal settings if interactive mode has been requested - otherwise nothing's ! 359: * done. Unbuffering stdout (via the setbuf() call) isn't really needed on System V ! 360: * since it's flushed whenever terminal input is requested. It's more efficient if ! 361: * we buffer the stdout (on System V) but safer (for other versions of Unix) if we ! 362: * include the setbuf() call. ! 363: * ! 364: */ ! 365: ! 366: whatami = READWRITE; /* always run start() as one process */ ! 367: canread = canwrite = TRUE; ! 368: ! 369: if ( tostdout == TRUE ) /* force separate read/write processes */ ! 370: splitme = TRUE; ! 371: ! 372: if ( interactive == TRUE ) { /* interactive mode settings always win */ ! 373: quiet = FALSE; ! 374: tostdout = FALSE; ! 375: splitme = TRUE; ! 376: blocksize = 1; ! 377: postbegin = NULL; ! 378: useslowsend = FALSE; ! 379: nostatus = INTERACTIVE; ! 380: setbuf(stdout, NULL); ! 381: } /* End if */ ! 382: ! 383: if ( useslowsend == TRUE ) { /* last resort only - not recommended */ ! 384: quiet = FALSE; ! 385: splitme = FALSE; ! 386: if ( blocksize > 1024 ) /* don't send too much all at once */ ! 387: blocksize = 1024; ! 388: } /* End if */ ! 389: ! 390: if ( tostdout == TRUE && fp_log == stderr ) ! 391: fp_log = NULL; ! 392: ! 393: if ( line == NULL && (interactive == TRUE || tostdout == TRUE) ) ! 394: error(FATAL, "a printer line must be supplied - use the -l option"); ! 395: ! 396: if ( (block = malloc(blocksize)) == NULL ) ! 397: error(FATAL, "no memory"); ! 398: ! 399: endmesg = mesg + sizeof mesg - 2; /* one byte from last position in mesg */ ! 400: ! 401: setupline(); /* configure the communications line */ ! 402: setupstdin(0); /* save current stdin terminal settings */ ! 403: ! 404: } /* End of initialize */ ! 405: ! 406: /*****************************************************************************/ ! 407: ! 408: start() ! 409: ! 410: { ! 411: ! 412: /* ! 413: * ! 414: * Tries to put the printer in the IDLE state before anything important is sent. ! 415: * Run as a single process no matter what has been assigned to splitme. Separate ! 416: * read and write processes, if requested, will be created after we're done here. ! 417: * ! 418: */ ! 419: ! 420: logit("printer startup\n"); ! 421: ! 422: currentstate = START; ! 423: clearline(); ! 424: ! 425: while ( 1 ) ! 426: switch ( getstatus(1) ) { ! 427: case IDLE: ! 428: case INTERACTIVE: ! 429: if ( postbegin != NULL && *postbegin != '\0' ) ! 430: Write(ttyo, postbegin, strlen(postbegin)); ! 431: clearline(); ! 432: return; ! 433: ! 434: case BUSY: ! 435: if ( sendctrlC == TRUE ) { ! 436: Write(ttyo, "\003", 1); ! 437: Rest(1); ! 438: } /* End if */ ! 439: break; ! 440: ! 441: case WAITING: ! 442: case ERROR: ! 443: case FLUSHING: ! 444: Write(ttyo, "\004", 1); ! 445: Rest(1); ! 446: break; ! 447: ! 448: case PRINTERERROR: ! 449: Rest(15); ! 450: break; ! 451: ! 452: case DISCONNECT: ! 453: error(FATAL, "Disconnected - printer may be offline"); ! 454: break; ! 455: ! 456: case ENDOFJOB: ! 457: case UNKNOWN: ! 458: clearline(); ! 459: break; ! 460: ! 461: default: ! 462: Rest(1); ! 463: break; ! 464: } /* End switch */ ! 465: ! 466: } /* End of start */ ! 467: ! 468: /*****************************************************************************/ ! 469: ! 470: split() ! 471: ! 472: { ! 473: ! 474: int pid; ! 475: void interrupt(); ! 476: ! 477: /* ! 478: * ! 479: * If splitme is TRUE we fork a process, make the parent handle reading, and let ! 480: * the child take care of writing. resetline() (file ifdef.c) contains all the ! 481: * system dependent code needed to reset the communications line for separate ! 482: * read and write processes. For now it's expected to return TRUE or FALSE and ! 483: * that value controls whether we try the fork. I've only tested the two process ! 484: * stuff for System V. Other versions of resetline() may just be dummy procedures ! 485: * that always return FALSE. If the fork() failed previous versions continued as ! 486: * a single process, although the implementation wasn't quite right, but I've now ! 487: * decided to quit. The main reason is a Datakit channel may be configured to ! 488: * flow control data in both directions, and if we run postio over that channel ! 489: * as a single process we likely will end up in deadlock. ! 490: * ! 491: */ ! 492: ! 493: if ( splitme == TRUE ) ! 494: if ( resetline() == TRUE ) { ! 495: pid = getpid(); ! 496: signal(joinsig, interrupt); ! 497: if ( (otherpid = fork()) == -1 ) ! 498: error(FATAL, "can't fork"); ! 499: else if ( otherpid == 0 ) { ! 500: whatami = WRITE; ! 501: nostatus = WRITEPROCESS; ! 502: otherpid = pid; ! 503: setupstdin(1); ! 504: } else whatami = READ; ! 505: } else if ( interactive == TRUE || tostdout == TRUE ) ! 506: error(FATAL, "can't create two process - check resetline()"); ! 507: else error(NON_FATAL, "running as a single process - check resetline()"); ! 508: ! 509: canread = (whatami & READ) ? TRUE : FALSE; ! 510: canwrite = (whatami & WRITE) ? TRUE : FALSE; ! 511: ! 512: } /* End of split */ ! 513: ! 514: /*****************************************************************************/ ! 515: ! 516: arguments() ! 517: ! 518: { ! 519: ! 520: int fd_in; /* next input file */ ! 521: ! 522: /* ! 523: * ! 524: * Makes sure all the non-option command line arguments are processed. If there ! 525: * aren't any arguments left when we get here we'll send stdin. Input files are ! 526: * only read and sent to the printer if canwrite is TRUE. Checking it here means ! 527: * we won't have to do it in send(). If interactive mode is TRUE we'll stay here ! 528: * forever sending stdin when we run out of files - exit with a break. Actually ! 529: * the loop is bogus and used at most once when we're in interactive mode because ! 530: * stdin is in a pseudo raw mode and the read() in readblock() should never see ! 531: * the end of file. ! 532: * ! 533: */ ! 534: ! 535: if ( canwrite == TRUE ) ! 536: do /* loop is for interactive mode */ ! 537: if ( argc < 1 ) ! 538: send(fileno(stdin), "pipe.end"); ! 539: else { ! 540: while ( argc > 0 ) { ! 541: if ( (fd_in = open(*argv, O_RDONLY)) == -1 ) ! 542: error(FATAL, "can't open %s", *argv); ! 543: send(fd_in, *argv); ! 544: close(fd_in); ! 545: argc--; ! 546: argv++; ! 547: } /* End while */ ! 548: } /* End else */ ! 549: while ( interactive == TRUE ); ! 550: ! 551: } /* End of arguments */ ! 552: ! 553: /*****************************************************************************/ ! 554: ! 555: send(fd_in, name) ! 556: ! 557: int fd_in; /* next input file */ ! 558: char *name; /* and it's pathname */ ! 559: ! 560: { ! 561: ! 562: /* ! 563: * ! 564: * Sends file *name to the printer. There's nothing left here that depends on ! 565: * sending and receiving status reports, although it can be reassuring to know ! 566: * the printer is responding and processing our job. Only the writer gets here ! 567: * in the two process implementation, and in that case split() has reset nostatus ! 568: * to WRITEPROCESS and that's what getstatus() always returns. For now we accept ! 569: * the IDLE state and ENDOFJOB as legitimate and ignore the INITIALIZING state. ! 570: * ! 571: */ ! 572: ! 573: if ( interactive == FALSE ) ! 574: logit("sending file %s\n", name); ! 575: ! 576: currentstate = SEND; ! 577: ! 578: if ( useslowsend == TRUE ) { ! 579: slowsend(fd_in); ! 580: return; ! 581: } /* End if */ ! 582: ! 583: while ( readblock(fd_in) ) ! 584: switch ( getstatus(0) ) { ! 585: case IDLE: ! 586: case BUSY: ! 587: case WAITING: ! 588: case PRINTING: ! 589: case ENDOFJOB: ! 590: case PRINTERERROR: ! 591: case UNKNOWN: ! 592: case NOSTATUS: ! 593: case WRITEPROCESS: ! 594: case INTERACTIVE: ! 595: writeblock(); ! 596: break; ! 597: ! 598: case ERROR: ! 599: fprintf(stderr, "%s", mesg); /* for csw */ ! 600: error(USER_FATAL, "PostScript Error"); ! 601: break; ! 602: ! 603: case FLUSHING: ! 604: error(USER_FATAL, "Flushing Job"); ! 605: break; ! 606: ! 607: case DISCONNECT: ! 608: error(FATAL, "Disconnected - printer may be offline"); ! 609: break; ! 610: } /* End switch */ ! 611: ! 612: } /* End of send */ ! 613: ! 614: /*****************************************************************************/ ! 615: ! 616: done() ! 617: ! 618: { ! 619: ! 620: int sleeptime = 15; /* for 'out of paper' etc. */ ! 621: ! 622: /* ! 623: * ! 624: * Tries to stay connected to the printer until we're reasonably sure the job is ! 625: * complete. It's the only way we can recover error messages or data generated by ! 626: * the PostScript program and returned over the communication line. Actually doing ! 627: * it correctly for all possible PostScript jobs is more difficult that it might ! 628: * seem. For example if we've sent several jobs, each with their own EOF mark, then ! 629: * waiting for ENDOFJOB won't guarantee all the jobs have completed. Even waiting ! 630: * for IDLE isn't good enough. Checking for the WAITING state after all the files ! 631: * have been sent and then sending an EOF may be the best approach, but even that ! 632: * won't work all the time - we could miss it or might not get there. Even sending ! 633: * our own special PostScript job after all the input files has it's own different ! 634: * set of problems, but probably could work (perhaps by printing a fake status ! 635: * message or just not timing out). Anyway it's probably not worth the trouble so ! 636: * for now we'll quit if writedone is TRUE and we get ENDOFJOB or IDLE. ! 637: * ! 638: * If we're running separate read and write processes the reader gets here after ! 639: * after split() while the writer goes to send() and only gets here after all the ! 640: * input files have been transmitted. When they're both here the writer sends the ! 641: * reader signal joinsig and that forces writedone to TRUE in the reader. At that ! 642: * point the reader can begin looking for an indication of the end of the job. ! 643: * The writer hangs around until the reader kills it (usually in cleanup()) sending ! 644: * occasional status requests. ! 645: * ! 646: */ ! 647: ! 648: if ( canwrite == TRUE ) ! 649: logit("waiting for end of job\n"); ! 650: ! 651: currentstate = DONE; ! 652: writedone = (whatami == READWRITE) ? TRUE : FALSE; ! 653: ! 654: while ( 1 ) { ! 655: switch ( getstatus(1) ) { ! 656: ! 657: case WRITEPROCESS: ! 658: if ( writedone == FALSE ) { ! 659: sendsignal(joinsig); ! 660: Write(ttyo, "\004", 1); ! 661: writedone = TRUE; ! 662: sleeptime = 1; ! 663: } /* End if */ ! 664: Rest(sleeptime++); ! 665: break; ! 666: ! 667: case WAITING: ! 668: Write(ttyo, "\004", 1); ! 669: Rest(1); ! 670: sleeptime = 15; ! 671: break; ! 672: ! 673: case IDLE: ! 674: case ENDOFJOB: ! 675: if ( writedone == TRUE ) { ! 676: logit("job complete\n"); ! 677: return; ! 678: } /* End if */ ! 679: break; ! 680: ! 681: case BUSY: ! 682: case PRINTING: ! 683: case INTERACTIVE: ! 684: sleeptime = 15; ! 685: break; ! 686: ! 687: case PRINTERERROR: ! 688: Rest(sleeptime++); ! 689: break; ! 690: ! 691: case ERROR: ! 692: fprintf(stderr, "%s", mesg); /* for csw */ ! 693: error(USER_FATAL, "PostScript Error"); ! 694: return; ! 695: ! 696: case FLUSHING: ! 697: error(USER_FATAL, "Flushing Job"); ! 698: return; ! 699: ! 700: case DISCONNECT: ! 701: error(FATAL, "Disconnected - printer may be offline"); ! 702: return; ! 703: ! 704: default: ! 705: Rest(1); ! 706: break; ! 707: } /* End switch */ ! 708: ! 709: if ( sleeptime > 60 ) ! 710: sleeptime = 60; ! 711: } /* End while */ ! 712: ! 713: } /* End of done */ ! 714: ! 715: /*****************************************************************************/ ! 716: ! 717: cleanup() ! 718: ! 719: { ! 720: ! 721: int w; ! 722: ! 723: /* ! 724: * ! 725: * Only needed if we're running separate read and write processes. Makes sure the ! 726: * write process is killed after the read process has successfully finished with ! 727: * all the jobs. sendsignal() returns a -1 if there's nobody to signal so things ! 728: * work when we're running a single process. ! 729: * ! 730: */ ! 731: ! 732: while ( sendsignal(SIGKILL) != -1 && (w = wait((int *)0)) != otherpid && w != -1 ) ; ! 733: ! 734: } /* End of cleanup */ ! 735: ! 736: /*****************************************************************************/ ! 737: ! 738: readblock(fd_in) ! 739: ! 740: int fd_in; /* current input file */ ! 741: ! 742: { ! 743: ! 744: static long blocknum = 1; ! 745: ! 746: /* ! 747: * ! 748: * Fills the input buffer with the next block, provided we're all done with the ! 749: * last one. Blocks from fd_in are stored in array block[]. head is the index ! 750: * of the next byte in block[] that's supposed to go to the printer. tail points ! 751: * one past the last byte in the current block. head is adjusted in writeblock() ! 752: * after each successful write, while head and tail are reset here each time ! 753: * a new block is read. Returns the number of bytes left in the current block. ! 754: * Read errors cause the program to abort. The fake status message that's put out ! 755: * in quiet mode is only so you can look at the log file and know something's ! 756: * happening - take it out if you want. ! 757: * ! 758: */ ! 759: ! 760: if ( head >= tail ) { /* done with the last block */ ! 761: if ( (tail = read(fd_in, block, blocksize)) == -1 ) ! 762: error(FATAL, "error reading input file"); ! 763: if ( quiet == TRUE && tail > 0 ) /* put out a fake message? */ ! 764: logit("%%%%[ status: busy; block: %d ]%%%%\n", blocknum++); ! 765: head = 0; ! 766: } /* End if */ ! 767: ! 768: return(tail - head); ! 769: ! 770: } /* End of readblock */ ! 771: ! 772: /*****************************************************************************/ ! 773: ! 774: writeblock() ! 775: ! 776: { ! 777: ! 778: int count; /* bytes successfully written */ ! 779: ! 780: /* ! 781: * ! 782: * Called from send() when it's OK to send the next block to the printer. head ! 783: * is adjusted after the write, and the number of bytes that were successfully ! 784: * written is returned to the caller. ! 785: * ! 786: */ ! 787: ! 788: if ( (count = write(ttyo, &block[head], tail - head)) == -1 ) ! 789: error(FATAL, "error writing to %s", line); ! 790: else if ( count == 0 ) ! 791: error(FATAL, "printer appears to be offline"); ! 792: ! 793: head += count; ! 794: return(count); ! 795: ! 796: } /* End of writeblock */ ! 797: ! 798: /*****************************************************************************/ ! 799: ! 800: getstatus(t) ! 801: ! 802: int t; /* sleep time after sending '\024' */ ! 803: ! 804: { ! 805: ! 806: int gotline = FALSE; /* value returned by readline() */ ! 807: int state = nostatus; /* representation of the current state */ ! 808: int mesgch; /* to restore mesg[] when tostdout == TRUE */ ! 809: ! 810: static int laststate = NOSTATUS; /* last state recognized */ ! 811: ! 812: /* ! 813: * ! 814: * Looks for things coming back from the printer on the communications line, parses ! 815: * complete lines retrieved by readline(), and returns an integer representation ! 816: * of the current printer status to the caller. If nothing was available a status ! 817: * request (control T) is sent to the printer and nostatus is returned to the ! 818: * caller (provided quiet isn't TRUE). Interactive mode either never returns from ! 819: * readline() or returns FALSE. ! 820: * ! 821: */ ! 822: ! 823: if ( canread == TRUE && (gotline = readline()) == TRUE ) { ! 824: state = parsemesg(); ! 825: if ( state != laststate || mesgptr != mesg || debug == ON ) ! 826: logit("%s", mesg); ! 827: ! 828: if ( tostdout == TRUE && currentstate != START ) { ! 829: mesgch = *mesgptr; ! 830: *mesgptr = '\0'; ! 831: fprintf(stdout, "%s", mesg); ! 832: fflush(stdout); ! 833: *mesgptr = mesgch; /* for ERROR in send() and done() */ ! 834: } /* End if */ ! 835: return(laststate = state); ! 836: } /* End if */ ! 837: ! 838: if ( (quiet == FALSE || currentstate != SEND) && ! 839: (tostdout == FALSE || currentstate == START) && interactive == FALSE ) { ! 840: if ( Write(ttyo, "\024", 1) != 1 ) ! 841: error(FATAL, "printer appears to be offline"); ! 842: if ( t > 0 ) Rest(t); ! 843: } /* End if */ ! 844: ! 845: return(nostatus); ! 846: ! 847: } /* End of getstatus */ ! 848: ! 849: /*****************************************************************************/ ! 850: ! 851: parsemesg() ! 852: ! 853: { ! 854: ! 855: char *e; /* end of printer message in mesg[] */ ! 856: char *key, *val; /* keyword/value strings in sbuf[] */ ! 857: char *p; /* for converting to lower case etc. */ ! 858: int i; /* where *key was found in status[] */ ! 859: ! 860: /* ! 861: * ! 862: * Parsing the lines that readline() stores in mesg[] is messy, and what's done ! 863: * here isn't completely correct nor as fast as it could be. The general format ! 864: * of lines that come back from the printer (assuming no data loss) is: ! 865: * ! 866: * str%%[ key: val; key: val; key: val ]%%\n ! 867: * ! 868: * where str can be most anything not containing a newline and printer reports ! 869: * (eg. status or error messages) are bracketed by "%%[ " and " ]%%" strings and ! 870: * end with a newline. Usually we'll have the string or printer report but not ! 871: * both. For most jobs the leading string will be empty, but could be anything ! 872: * generated on a printer and returned over the communications line using the ! 873: * PostScript print operator. I'll assume PostScript jobs are well behaved and ! 874: * never bracket their messages with "%%[ " and " ]%%" strings that delimit status ! 875: * or error messages. ! 876: * ! 877: * Printer reports consist of one or more key/val pairs, and what we're interested ! 878: * in (status or error indications) may not be the first pair in the list. In ! 879: * addition we'll sometimes want the value associated with a keyword (eg. when ! 880: * key = status) and other times we'll want the keyword (eg. when key = Error or ! 881: * Flushing). The last pair isn't terminated by a semicolon and a value string ! 882: * often contains many space separated words and it can even include colons in ! 883: * meaningful places. I've also decided to continue converting things to lower ! 884: * case before doing the lookup in status[]. The isupper() test is for Berkeley ! 885: * systems. ! 886: * ! 887: */ ! 888: ! 889: if ( *(mesgptr = find("%%[ ", mesg)) != '\0' && *(e = find(" ]%%", mesgptr+4)) != '\0' ) { ! 890: strcpy(sbuf, mesgptr+4); /* don't change mesg[] */ ! 891: sbuf[e-mesgptr-4] = '\0'; /* ignore the trailing " ]%%" */ ! 892: ! 893: for ( key = strtok(sbuf, " :"); key != NULL; key = strtok(NULL, " :") ) { ! 894: if ( (val = strtok(NULL, ";")) != NULL && strcmp(key, "status") == 0 ) ! 895: key = val; ! 896: ! 897: for ( ; *key == ' '; key++ ) ; /* skip any leading spaces */ ! 898: for ( p = key; *p; p++ ) /* convert to lower case */ ! 899: if ( *p == ':' ) { ! 900: *p = '\0'; ! 901: break; ! 902: } else if ( isupper(*p) ) *p = tolower(*p); ! 903: ! 904: for ( i = 0; status[i].state != NULL; i++ ) ! 905: if ( strcmp(status[i].state, key) == 0 ) ! 906: return(status[i].val); ! 907: } /* End for */ ! 908: } else if ( strcmp(mesg, "CONVERSATION ENDED.\n") == 0 ) ! 909: return(DISCONNECT); ! 910: ! 911: return(nostatus); ! 912: ! 913: } /* End of parsemesg */ ! 914: ! 915: /*****************************************************************************/ ! 916: ! 917: char *find(str1, str2) ! 918: ! 919: char *str1; /* look for this string */ ! 920: char *str2; /* in this one */ ! 921: ! 922: { ! 923: ! 924: char *s1, *s2; /* can't change str1 or str2 too fast */ ! 925: ! 926: /* ! 927: * ! 928: * Looks for *str1 in string *str2. Returns a pointer to the start of the substring ! 929: * if it's found or to the end of string str2 otherwise. ! 930: * ! 931: */ ! 932: ! 933: for ( ; *str2 != '\0'; str2++ ) { ! 934: for ( s1 = str1, s2 = str2; *s1 != '\0' && *s1 == *s2; s1++, s2++ ) ; ! 935: if ( *s1 == '\0' ) ! 936: break; ! 937: } /* End for */ ! 938: ! 939: return(str2); ! 940: ! 941: } /* End of find */ ! 942: ! 943: /*****************************************************************************/ ! 944: ! 945: clearline() ! 946: ! 947: { ! 948: ! 949: /* ! 950: * ! 951: * Reads characters from the input line until nothing's left. Don't do anything if ! 952: * we're currently running separate read and write processes. ! 953: * ! 954: */ ! 955: ! 956: if ( whatami == READWRITE ) ! 957: while ( readline() != FALSE ) ; ! 958: ! 959: } /* End of clearline */ ! 960: ! 961: /*****************************************************************************/ ! 962: ! 963: sendsignal(sig) ! 964: ! 965: int sig; /* this goes to the other process */ ! 966: ! 967: { ! 968: ! 969: /* ! 970: * ! 971: * Sends signal sig to the other process if we're running as separate read and ! 972: * write processes. Returns the result of the kill if there's someone else to ! 973: * signal or -1 if we're running alone. ! 974: * ! 975: */ ! 976: ! 977: if ( whatami != READWRITE && otherpid > 1 ) ! 978: return(kill(otherpid, sig)); ! 979: ! 980: return(-1); ! 981: ! 982: } /* End of sendsignal */ ! 983: ! 984: /*****************************************************************************/ ! 985: ! 986: void interrupt(sig) ! 987: ! 988: int sig; /* signal that we caught */ ! 989: ! 990: { ! 991: ! 992: /* ! 993: * ! 994: * Caught a signal - all except joinsig cause the program to quit. joinsig is the ! 995: * signal sent by the writer to the reader after all the jobs have been transmitted. ! 996: * Used to tell the read process when it can start looking for the end of the job. ! 997: * ! 998: */ ! 999: ! 1000: signal(sig, SIG_IGN); ! 1001: ! 1002: if ( sig != joinsig ) { ! 1003: x_stat |= FATAL; ! 1004: if ( canread == TRUE ) ! 1005: if ( interactive == FALSE ) ! 1006: error(NON_FATAL, "signal %d abort", sig); ! 1007: else error(NON_FATAL, "quitting"); ! 1008: quit(sig); ! 1009: } /* End if */ ! 1010: ! 1011: writedone = TRUE; ! 1012: signal(joinsig, interrupt); ! 1013: ! 1014: } /* End of interrupt */ ! 1015: ! 1016: /*****************************************************************************/ ! 1017: ! 1018: logit(mesg, a1, a2, a3) ! 1019: ! 1020: char *mesg; /* control string */ ! 1021: unsigned a1, a2, a3; /* and possible arguments */ ! 1022: ! 1023: { ! 1024: ! 1025: /* ! 1026: * ! 1027: * Simple routine that's used to write a message to the log file. ! 1028: * ! 1029: */ ! 1030: ! 1031: if ( mesg != NULL && fp_log != NULL ) { ! 1032: fprintf(fp_log, mesg, a1, a2, a3); ! 1033: fflush(fp_log); ! 1034: } /* End if */ ! 1035: ! 1036: } /* End of logit */ ! 1037: ! 1038: /*****************************************************************************/ ! 1039: ! 1040: error(kind, mesg, a1, a2, a3) ! 1041: ! 1042: int kind; /* FATAL or NON_FATAL error */ ! 1043: char *mesg; /* error message control string */ ! 1044: unsigned a1, a2, a3; /* control string arguments */ ! 1045: ! 1046: { ! 1047: ! 1048: FILE *fp_err; ! 1049: ! 1050: /* ! 1051: * ! 1052: * Called when we've run into some kind of program error. First *mesg is printed ! 1053: * using the control string arguments a?. If kind is FATAL and we're not ignoring ! 1054: * errors the program will be terminated. If mesg is NULL or *mesg is the NULL ! 1055: * string nothing will be printed. ! 1056: * ! 1057: */ ! 1058: ! 1059: fp_err = (fp_log != NULL) ? fp_log : stderr; ! 1060: ! 1061: if ( mesg != NULL && *mesg != '\0' ) { ! 1062: fprintf(fp_err, "%s: ", prog_name); ! 1063: fprintf(fp_err, mesg, a1, a2, a3); ! 1064: putc('\n', fp_err); ! 1065: } /* End if */ ! 1066: ! 1067: x_stat |= kind; ! 1068: ! 1069: if ( kind != NON_FATAL && ignore == OFF ) ! 1070: quit(SIGTERM); ! 1071: ! 1072: } /* End of error */ ! 1073: ! 1074: /*****************************************************************************/ ! 1075: ! 1076: quit(sig) ! 1077: ! 1078: int sig; ! 1079: ! 1080: { ! 1081: ! 1082: int w; ! 1083: ! 1084: /* ! 1085: * ! 1086: * Makes sure everything is properly cleaned up if there's a signal or FATAL error ! 1087: * that should cause the program to terminate. The sleep by the write process is ! 1088: * to help give the reset sequence a chance to reach the printer before we break ! 1089: * the connection - primarily for printers connected to Datakit. There's a very ! 1090: * slight chance the reset sequence that's sent to the printer could get us stuck ! 1091: * here. Simplest solution is don't bother to send it - everything works without it. ! 1092: * Flushing ttyo would be better, but means yet another system dependent procedure ! 1093: * in ifdef.c! I'll leave things be for now. ! 1094: * ! 1095: * Obscure problem on PS-810 turbos says wait a bit after sending an interrupt. ! 1096: * Seem to remember the printer getting into a bad state immediately after the ! 1097: * top was opened when the toner light was on. A sleep after sending the ctrl-C ! 1098: * seemed to fix things. ! 1099: * ! 1100: */ ! 1101: ! 1102: signal(sig, SIG_IGN); ! 1103: ignore = ON; ! 1104: ! 1105: while ( sendsignal(sig) != -1 && (w = wait((int *)0)) != otherpid && w != -1 ) ; ! 1106: ! 1107: setupstdin(2); ! 1108: ! 1109: if ( currentstate != NOTCONNECTED ) { ! 1110: if ( sendctrlC == TRUE ) { ! 1111: Write(ttyo, "\003", 1); ! 1112: Rest(1); /* PS-810 turbo problem?? */ ! 1113: } /* End if */ ! 1114: Write(ttyo, "\004", 1); ! 1115: } /* End if */ ! 1116: ! 1117: alarm(0); /* prevents sleep() loop on V9 systems */ ! 1118: Rest(2); ! 1119: ! 1120: exit(x_stat); ! 1121: ! 1122: } /* End of quit */ ! 1123: ! 1124: /*****************************************************************************/ ! 1125: ! 1126: Rest(t) ! 1127: ! 1128: int t; ! 1129: ! 1130: { ! 1131: ! 1132: /* ! 1133: * ! 1134: * Used to replace sleep() calls. Only needed if we're running the program as ! 1135: * a read and write process and don't want to have the read process sleep. Most ! 1136: * sleeps are in the code because of the non-blocking read used by the single ! 1137: * process implementation. Probably should be a macro. ! 1138: * ! 1139: */ ! 1140: ! 1141: if ( t > 0 && canwrite == TRUE ) ! 1142: sleep(t); ! 1143: ! 1144: } /* End of Rest */ ! 1145: ! 1146: /*****************************************************************************/ ! 1147: ! 1148: Read(fd, buf, n) ! 1149: ! 1150: int fd; ! 1151: char *buf; ! 1152: int n; ! 1153: ! 1154: { ! 1155: ! 1156: int count; ! 1157: ! 1158: /* ! 1159: * ! 1160: * Used to replace some of the read() calls. Only needed if we're running separate ! 1161: * read and write processes. Should only be used to replace read calls on ttyi. ! 1162: * Always returns 0 to the caller if the process doesn't have its READ flag set. ! 1163: * Probably should be a macro. ! 1164: * ! 1165: */ ! 1166: ! 1167: if ( canread == TRUE ) { ! 1168: if ( (count = read(fd, buf, n)) == -1 && errno == EINTR ) ! 1169: count = 0; ! 1170: } else count = 0; ! 1171: ! 1172: return(count); ! 1173: ! 1174: } /* End of Read */ ! 1175: ! 1176: /*****************************************************************************/ ! 1177: ! 1178: Write(fd, buf, n) ! 1179: ! 1180: int fd; ! 1181: char *buf; ! 1182: int n; ! 1183: ! 1184: { ! 1185: ! 1186: int count; ! 1187: ! 1188: /* ! 1189: * ! 1190: * Used to replace some of the write() calls. Again only needed if we're running ! 1191: * separate read and write processes. Should only be used to replace write calls ! 1192: * on ttyo. Always returns n to the caller if the process doesn't have its WRITE ! 1193: * flag set. Should also probably be a macro. ! 1194: * ! 1195: */ ! 1196: ! 1197: if ( canwrite == TRUE ) { ! 1198: if ( (count = write(fd, buf, n)) == -1 && errno == EINTR ) ! 1199: count = n; ! 1200: } else count = n; ! 1201: ! 1202: return(count); ! 1203: ! 1204: } /* End of Write */ ! 1205: ! 1206: /*****************************************************************************/ ! 1207:
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