1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 */ 6 7 #ifndef lint 8 char copyright[] = 9 "@(#) Copyright (c) 1980 Regents of the University of California.\n\ 10 All rights reserved.\n"; 11 #endif not lint 12 13 #ifndef lint 14 static char sccsid[] = "@(#)sysline.c 5.3 (Berkeley) 08/31/85"; 15 #endif not lint 16 17 /* 18 * sysline - system status display on 25th line of terminal 19 * j.k.foderaro 20 * 21 * Prints a variety of information on the special status line of terminals 22 * that have a status display capability. Cursor motions, status commands, 23 * etc. are gleamed from /etc/termcap. 24 * By default, all information is printed, and flags are given on the command 25 * line to disable the printing of information. The information and 26 * disabling flags are: 27 * 28 * flag what 29 * ----- ---- 30 * time of day 31 * load average and change in load average in the last 5 mins 32 * number of user logged on 33 * -p # of processes the users owns which are runnable and the 34 * number which are suspended. Processes whose parent is 1 35 * are not counted. 36 * -l users who've logged on and off. 37 * -m summarize new mail which has arrived 38 * 39 * <other flags> 40 * -r use non reverse video 41 * -c turn off 25th line for 5 seconds before redisplaying. 42 * -b beep once one the half hour, twice on the hour 43 * +N refresh display every N seconds. 44 * -i print pid first thing 45 * -e do simple print designed for an emacs buffer line 46 * -w do the right things for a window 47 * -h print hostname between time and load average 48 * -D print day/date before time of day 49 * -d debug mode - print status line data in human readable format 50 * -q quiet mode - don't output diagnostic messages 51 * -s print Short (left-justified) line if escapes not allowed 52 * -j Print left Justified line regardless 53 */ 54 55 #define BSD4_2 /* for 4.2 BSD */ 56 #define WHO /* turn this on always */ 57 #define HOSTNAME /* 4.1a or greater, with hostname() */ 58 #define RWHO /* 4.1a or greater, with rwho */ 59 #define VMUNIX /* turn this on if you are running on vmunix */ 60 #define NEW_BOOTTIME /* 4.1c or greater */ 61 62 #define NETPREFIX "ucb" 63 #define DEFDELAY 60 /* update status once per minute */ 64 #define MAILDIR "/usr/spool/mail" 65 /* 66 * if MAXLOAD is defined, then if the load average exceeded MAXLOAD 67 * then the process table will not be scanned and the log in/out data 68 * will not be checked. The purpose of this is to reduced the load 69 * on the system when it is loaded. 70 */ 71 #define MAXLOAD 6.0 72 73 #include <stdio.h> 74 #include <sys/param.h> 75 #include <sys/signal.h> 76 #include <utmp.h> 77 #include <ctype.h> 78 #ifndef BSD4_2 79 #include <unctrl.h> 80 #endif 81 #include <sys/time.h> 82 #include <sys/stat.h> 83 #ifdef VMUNIX 84 #include <nlist.h> 85 #include <sys/vtimes.h> 86 #include <sys/proc.h> 87 #endif 88 #ifdef pdp11 89 #include <a.out.h> 90 #include <sys/proc.h> 91 #endif 92 #include <curses.h> 93 #undef nl 94 #ifdef TERMINFO 95 #include <term.h> 96 #endif TERMINFO 97 98 #ifdef RWHO 99 #include <protocols/rwhod.h> 100 101 #define DOWN_THRESHOLD (11 * 60) 102 #define RWHOLEADER "/usr/spool/rwho/whod." 103 104 struct remotehost { 105 char *rh_host; 106 int rh_file; 107 } remotehost[10]; 108 int nremotes = 0; 109 #endif RWHO 110 111 struct nlist nl[] = { 112 #ifdef NEW_BOOTTIME 113 { "_boottime" }, /* After 4.1a the label changed to "boottime" */ 114 #else 115 { "_bootime" }, /* Under 4.1a and earlier it is "bootime" */ 116 #endif 117 #define NL_BOOT 0 118 { "_proc" }, 119 #define NL_PROC 1 120 { "_avenrun" }, 121 #define NL_AVEN 2 122 #ifdef VMUNIX 123 { "_nproc" }, 124 #define NL_NPROC 3 125 #endif 126 0 127 }; 128 129 /* stuff for the kernel */ 130 int kmem; /* file descriptor for /dev/kmem */ 131 struct proc *proc, *procNPROC; 132 int nproc; 133 int procadr; 134 double avenrun[3]; /* used for storing load averages */ 135 136 /* 137 * In order to determine how many people are logged on and who has 138 * logged in or out, we read in the /etc/utmp file. We also keep track of 139 * the previous utmp file. 140 */ 141 int ut = -1; /* the file descriptor */ 142 struct utmp *new, *old; 143 char *status; /* per tty status bits, see below */ 144 int nentries; /* number of utmp entries */ 145 /* string lengths for printing */ 146 #define LINESIZE (sizeof old->ut_line) 147 #define NAMESIZE (sizeof old->ut_name) 148 /* 149 * Status codes to say what has happened to a particular entry in utmp. 150 * NOCH means no change, ON means new person logged on, 151 * OFF means person logged off. 152 */ 153 #define NOCH 0 154 #define ON 0x1 155 #define OFF 0x2 156 157 #ifdef WHO 158 char whofilename[100]; 159 char whofilename2[100]; 160 #endif 161 162 #ifdef HOSTNAME 163 char hostname[MAXHOSTNAMELEN+1]; /* one more for null termination */ 164 #endif 165 166 char lockfilename[100]; /* if exists, will prevent us from running */ 167 168 /* flags which determine which info is printed */ 169 int mailcheck = 1; /* m - do biff like checking of mail */ 170 int proccheck = 1; /* p - give information on processes */ 171 int logcheck = 1; /* l - tell who logs in and out */ 172 int hostprint = 0; /* h - print out hostname */ 173 int dateprint = 0; /* h - print out day/date */ 174 int quiet = 0; /* q - hush diagnostic messages */ 175 176 /* flags which determine how things are printed */ 177 int clr_bet_ref = 0; /* c - clear line between refeshes */ 178 int reverse = 1; /* r - use reverse video */ 179 int shortline = 0; /* s - short (left-justified) if escapes not allowed */ 180 int leftline = 0; /* j - left-justified even if escapes allowed */ 181 182 /* flags which have terminal do random things */ 183 int beep = 0; /* b - beep every half hour and twice every hour */ 184 int printid = 0; /* i - print pid of this process at startup */ 185 int synch = 1; /* synchronize with clock */ 186 187 /* select output device (status display or straight output) */ 188 int emacs = 0; /* e - assume status display */ 189 int window = 0; /* w - window mode */ 190 int dbug = 0; /* d - debug */ 191 192 /* 193 * used to turn off reverse video every REVOFF times 194 * in an attempt to not wear out the phospher. 195 */ 196 #define REVOFF 5 197 int revtime = 1; 198 199 /* used by mail checker */ 200 off_t mailsize = 0; 201 off_t linebeg = 0; /* place where we last left off reading */ 202 203 /* things used by the string routines */ 204 int chars; /* number of printable characters */ 205 char *sp; 206 char strarr[512]; /* big enough now? */ 207 /* flags to stringdump() */ 208 char sawmail; /* remember mail was seen to print bells */ 209 char mustclear; /* status line messed up */ 210 211 /* strings which control status line display */ 212 #ifdef TERMINFO 213 char *rev_out, *rev_end, *arrows; 214 char *tparm(); 215 #else 216 char to_status_line[64]; 217 char from_status_line[64]; 218 char dis_status_line[64]; 219 char clr_eol[64]; 220 char rev_out[20], rev_end[20]; 221 char *arrows, *bell = "\007"; 222 int eslok; /* escapes on status line okay (reverse, cursor addressing) */ 223 int columns; 224 #define tparm(cap, parm) tgoto((cap), 0, (parm)) 225 char *tgoto(); 226 #endif 227 228 /* to deal with window size changes */ 229 #ifdef SIGWINCH 230 int sigwinch(); 231 char winchanged; /* window size has changed since last update */ 232 #endif 233 234 /* random globals */ 235 char *username; 236 char *ourtty; /* keep track of what tty we're on */ 237 struct stat stbuf, mstbuf; /* mstbuf for mail check only */ 238 unsigned delay = DEFDELAY; 239 short uid; 240 double loadavg = 0.0; /* current load average */ 241 int users = 0; 242 243 char *getenv(); 244 char *ttyname(); 245 char *strcpy1(); 246 char *sysrup(); 247 char *calloc(); 248 char *malloc(); 249 int outc(); 250 int erroutc(); 251 252 main(argc,argv) 253 register char **argv; 254 { 255 int clearbotl(); 256 register char *cp; 257 char *home; 258 extern char _sobuf[]; 259 260 setbuf(stdout, _sobuf); 261 262 #ifdef HOSTNAME 263 gethostname(hostname, sizeof hostname - 1); 264 #endif 265 266 for (argv++; *argv != 0; argv++) 267 switch (**argv) { 268 case '-': 269 for (cp = *argv + 1; *cp; cp++) { 270 switch(*cp) { 271 case 'r' : /* turn off reverse video */ 272 reverse = 0; 273 break; 274 case 'c': 275 clr_bet_ref = 1; 276 break; 277 case 'h': 278 hostprint = 1; 279 break; 280 case 'D': 281 dateprint = 1; 282 break; 283 #ifdef RWHO 284 case 'H': 285 if (argv[1] == 0) 286 break; 287 argv++; 288 if (strcmp(hostname, *argv) && 289 strcmp(&hostname[sizeof NETPREFIX - 1], *argv)) 290 remotehost[nremotes++].rh_host = *argv; 291 break; 292 #endif RWHO 293 case 'm': 294 mailcheck = 0; 295 break; 296 case 'p': 297 proccheck = 0; 298 break; 299 case 'l': 300 logcheck = 0; 301 break; 302 case 'b': 303 beep = 1; 304 break; 305 case 'i': 306 printid = 1; 307 break; 308 case 'w': 309 window = 1; 310 break; 311 case 'e': 312 emacs = 1; 313 break; 314 case 'd': 315 dbug = 1; 316 break; 317 case 'q': 318 quiet = 1; 319 break; 320 case 's': 321 shortline = 1; 322 break; 323 case 'j': 324 leftline = 1; 325 break; 326 default: 327 fprintf(stderr, 328 "sysline: bad flag: %c\n", *cp); 329 } 330 } 331 break; 332 case '+': 333 delay = atoi(*argv + 1); 334 if (delay < 10) 335 delay = 10; 336 else if (delay > 500) 337 delay = 500; 338 synch = 0; /* no more sync */ 339 break; 340 default: 341 fprintf(stderr, "sysline: illegal argument %s\n", 342 argv[0]); 343 } 344 if (emacs) { 345 reverse = 0; 346 columns = 79; 347 } else /* if not to emacs window, initialize terminal dependent info */ 348 initterm(); 349 #ifdef SIGWINCH 350 /* 351 * When the window size changes and we are the foreground 352 * process (true if -w), we get this signal. 353 */ 354 signal(SIGWINCH, sigwinch); 355 #endif 356 getwinsize(); /* get window size from ioctl */ 357 358 /* immediately fork and let the parent die if not emacs mode */ 359 if (!emacs && !window && !dbug) { 360 if (fork()) 361 exit(0); 362 /* pgrp should take care of things, but ignore them anyway */ 363 signal(SIGINT, SIG_IGN); 364 signal(SIGQUIT, SIG_IGN); 365 #ifdef VMUNIX 366 signal(SIGTTOU, SIG_IGN); 367 #endif 368 } 369 /* 370 * When we logoff, init will do a "vhangup()" on this 371 * tty which turns off I/O access and sends a SIGHUP 372 * signal. We catch this and thereby clear the status 373 * display. Note that a bug in 4.1bsd caused the SIGHUP 374 * signal to be sent to the wrong process, so you had to 375 * `kill -HUP' yourself in your .logout file. 376 * Do the same thing for SIGTERM, which is the default kill 377 * signal. 378 */ 379 signal(SIGHUP, clearbotl); 380 signal(SIGTERM, clearbotl); 381 /* 382 * This is so kill -ALRM to force update won't screw us up.. 383 */ 384 signal(SIGALRM, SIG_IGN); 385 386 uid = getuid(); 387 ourtty = ttyname(2); /* remember what tty we are on */ 388 if (printid) { 389 printf("%d\n", getpid()); 390 fflush(stdout); 391 } 392 dup2(2, 1); 393 394 if ((home = getenv("HOME")) == 0) 395 home = ""; 396 strcpy1(strcpy1(whofilename, home), "/.who"); 397 strcpy1(strcpy1(whofilename2, home), "/.sysline"); 398 strcpy1(strcpy1(lockfilename, home), "/.syslinelock"); 399 400 if ((kmem = open("/dev/kmem",0)) < 0) { 401 fprintf(stderr, "Can't open kmem.\n"); 402 exit(1); 403 } 404 readnamelist(); 405 if (proccheck) 406 initprocread(); 407 if (mailcheck) 408 if ((username = getenv("USER")) == 0) 409 mailcheck = 0; 410 else { 411 chdir(MAILDIR); 412 if (stat(username, &mstbuf) >= 0) 413 mailsize = mstbuf.st_size; 414 else 415 mailsize = 0; 416 } 417 418 while (emacs || window || isloggedin()) 419 if (access(lockfilename, 0) >= 0) 420 sleep(60); 421 else { 422 prtinfo(); 423 sleep(delay); 424 if (clr_bet_ref) { 425 tputs(dis_status_line, 1, outc); 426 fflush(stdout); 427 sleep(5); 428 } 429 revtime = (1 + revtime) % REVOFF; 430 } 431 clearbotl(); 432 /*NOTREACHED*/ 433 } 434 435 isloggedin() 436 { 437 /* 438 * you can tell if a person has logged out if the owner of 439 * the tty has changed 440 */ 441 struct stat statbuf; 442 443 return fstat(2, &statbuf) == 0 && statbuf.st_uid == uid; 444 } 445 446 readnamelist() 447 { 448 time_t bootime, clock, nintv, time(); 449 450 #ifdef pdp11 451 nlist("/unix", nl); 452 #else 453 nlist("/vmunix", nl); 454 #endif 455 if (nl[0].n_value == 0) { 456 if (!quiet) 457 fprintf(stderr, "No namelist\n"); 458 return; 459 } 460 lseek(kmem, (long)nl[NL_BOOT].n_value, 0); 461 read(kmem, &bootime, sizeof(bootime)); 462 (void) time(&clock); 463 nintv = clock - bootime; 464 if (nintv <= 0L || nintv > 60L*60L*24L*365L) { 465 if (!quiet) 466 fprintf(stderr, 467 "Time makes no sense... namelist must be wrong\n"); 468 nl[NL_PROC].n_value = nl[NL_AVEN].n_value = 0; 469 } 470 } 471 472 readutmp(nflag) 473 char nflag; 474 { 475 static time_t lastmod; /* initially zero */ 476 static off_t utmpsize; /* ditto */ 477 struct stat st; 478 479 if (ut < 0 && (ut = open("/etc/utmp", 0)) < 0) { 480 fprintf(stderr, "sysline: Can't open utmp.\n"); 481 exit(1); 482 } 483 if (fstat(ut, &st) < 0 || st.st_mtime == lastmod) 484 return 0; 485 lastmod = st.st_mtime; 486 if (utmpsize != st.st_size) { 487 utmpsize = st.st_size; 488 nentries = utmpsize / sizeof (struct utmp); 489 if (old == 0) { 490 old = (struct utmp *)calloc(utmpsize, 1); 491 new = (struct utmp *)calloc(utmpsize, 1); 492 } else { 493 old = (struct utmp *)realloc((char *)old, utmpsize); 494 new = (struct utmp *)realloc((char *)new, utmpsize); 495 free(status); 496 } 497 status = malloc(nentries * sizeof *status); 498 if (old == 0 || new == 0 || status == 0) { 499 fprintf(stderr, "sysline: Out of memory.\n"); 500 exit(1); 501 } 502 } 503 lseek(ut, 0L, 0); 504 (void) read(ut, (char *) (nflag ? new : old), utmpsize); 505 return 1; 506 } 507 508 /* 509 * read in the process table locations and sizes, and allocate space 510 * for storing the process table. This is done only once. 511 */ 512 initprocread() 513 { 514 515 if (nl[NL_PROC].n_value == 0) 516 return; 517 #ifdef VMUNIX 518 lseek(kmem, (long)nl[NL_PROC].n_value, 0); 519 read(kmem, &procadr, sizeof procadr); 520 lseek(kmem, (long)nl[NL_NPROC].n_value, 0); 521 read(kmem, &nproc, sizeof nproc); 522 #endif 523 #ifdef pdp11 524 procadr = nl[NL_PROC].n_value; 525 nproc = NPROC; /* from param.h */ 526 #endif 527 if ((proc = (struct proc *) calloc(nproc, sizeof (struct proc))) == 0) { 528 fprintf(stderr, "Out of memory.\n"); 529 exit(1); 530 } 531 procNPROC = proc + nproc; 532 } 533 534 /* 535 * read in the process table. This assumes that initprocread has alread been 536 * called to set up storage. 537 */ 538 readproctab() 539 { 540 541 if (nl[NL_PROC].n_value == 0) 542 return (0); 543 lseek(kmem, (long)procadr, 0); 544 read(kmem, (char *)proc, nproc * sizeof (struct proc)); 545 return (1); 546 } 547 548 prtinfo() 549 { 550 int on, off; 551 register i; 552 char fullprocess; 553 554 stringinit(); 555 #ifdef SIGWINCH 556 if (winchanged) { 557 winchanged = 0; 558 getwinsize(); 559 mustclear = 1; 560 } 561 #endif 562 #ifdef WHO 563 /* check for file named .who in the home directory */ 564 whocheck(); 565 #endif 566 timeprint(); 567 /* 568 * if mail is seen, don't print rest of info, just the mail 569 * reverse new and old so that next time we run, we won't lose log 570 * in and out information 571 */ 572 if (mailcheck && (sawmail = mailseen())) 573 goto bottom; 574 #ifdef HOSTNAME 575 #ifdef RWHO 576 for (i = 0; i < nremotes; i++) { 577 char *tmp; 578 579 stringspace(); 580 tmp = sysrup(remotehost + i); 581 stringcat(tmp, strlen(tmp)); 582 } 583 #endif 584 /* 585 * print hostname info if requested 586 */ 587 if (hostprint) { 588 stringspace(); 589 stringcat(hostname, -1); 590 } 591 #endif 592 /* 593 * print load average and difference between current load average 594 * and the load average 5 minutes ago 595 */ 596 if (nl[NL_AVEN].n_value != 0) { 597 double diff; 598 599 stringspace(); 600 #ifdef VMUNIX 601 lseek(kmem, (long)nl[NL_AVEN].n_value, 0); 602 read(kmem, avenrun, sizeof avenrun); 603 #endif 604 #ifdef pdp11 605 loadav(avenrun); 606 #endif 607 if ((diff = avenrun[0] - avenrun[1]) < 0.0) 608 stringprt("%.1f %.1f", avenrun[0], diff); 609 else 610 stringprt("%.1f +%.1f", avenrun[0], diff); 611 loadavg = avenrun[0]; /* remember load average */ 612 } 613 /* 614 * print log on and off information 615 */ 616 stringspace(); 617 fullprocess = 1; 618 #ifdef MAXLOAD 619 if (loadavg > MAXLOAD) 620 fullprocess = 0; /* too loaded to run */ 621 #endif 622 /* 623 * Read utmp file (logged in data) only if we are doing a full 624 * process, or if this is the first time and we are calculating 625 * the number of users. 626 */ 627 on = off = 0; 628 if (users == 0) { /* first time */ 629 if (readutmp(0)) 630 for (i = 0; i < nentries; i++) 631 if (old[i].ut_name[0]) 632 users++; 633 } else if (fullprocess && readutmp(1)) { 634 struct utmp *tmp; 635 636 users = 0; 637 for (i = 0; i < nentries; i++) { 638 if (strncmp(old[i].ut_name, 639 new[i].ut_name, NAMESIZE) == 0) 640 status[i] = NOCH; 641 else if (old[i].ut_name[0] == '\0') { 642 status[i] = ON; 643 on++; 644 } else if (new[i].ut_name[0] == '\0') { 645 status[i] = OFF; 646 off++; 647 } else { 648 status[i] = ON | OFF; 649 on++; 650 off++; 651 } 652 if (new[i].ut_name[0]) 653 users++; 654 } 655 tmp = new; 656 new = old; 657 old = tmp; 658 } 659 /* 660 * Print: 661 * 1. number of users 662 * 2. a * for unread mail 663 * 3. a - if load is too high 664 * 4. number of processes running and stopped 665 */ 666 stringprt("%du", users); 667 if (mailsize > 0 && mstbuf.st_mtime >= mstbuf.st_atime) 668 stringcat("*", -1); 669 if (!fullprocess && (proccheck || logcheck)) 670 stringcat("-", -1); 671 if (fullprocess && proccheck && readproctab()) { 672 register struct proc *p; 673 int procrun, procstop; 674 675 /* 676 * We are only interested in processes which have the same 677 * uid as us, and whose parent process id is not 1. 678 */ 679 procrun = procstop = 0; 680 for (p = proc; p < procNPROC; p++) { 681 if (p->p_stat == 0 || p->p_pgrp == 0 || 682 p->p_uid != uid || p->p_ppid == 1) 683 continue; 684 switch (p->p_stat) { 685 case SSTOP: 686 procstop++; 687 break; 688 case SSLEEP: 689 /* 690 * Sleep can mean waiting for a signal or just 691 * in a disk or page wait queue ready to run. 692 * We can tell if it is the later by the pri 693 * being negative. 694 */ 695 if (p->p_pri < PZERO) 696 procrun++; 697 break; 698 case SWAIT: 699 case SRUN: 700 case SIDL: 701 procrun++; 702 } 703 } 704 if (procrun > 0 || procstop > 0) { 705 stringspace(); 706 if (procrun > 0 && procstop > 0) 707 stringprt("%dr %ds", procrun, procstop); 708 else if (procrun > 0) 709 stringprt("%dr", procrun); 710 else 711 stringprt("%ds", procstop); 712 } 713 } 714 /* 715 * If anyone has logged on or off, and we are interested in it, 716 * print it out. 717 */ 718 if (logcheck) { 719 /* old and new have already been swapped */ 720 if (on) { 721 stringspace(); 722 stringcat("on:", -1); 723 for (i = 0; i < nentries; i++) 724 if (status[i] & ON) { 725 stringprt(" %.8s", old[i].ut_name); 726 ttyprint(old[i].ut_line); 727 } 728 } 729 if (off) { 730 stringspace(); 731 stringcat("off:", -1); 732 for (i = 0; i < nentries; i++) 733 if (status[i] & OFF) { 734 stringprt(" %.8s", new[i].ut_name); 735 ttyprint(new[i].ut_line); 736 } 737 } 738 } 739 bottom: 740 /* dump out what we know */ 741 stringdump(); 742 } 743 744 timeprint() 745 { 746 long curtime; 747 struct tm *tp, *localtime(); 748 static int beepable = 1; 749 750 /* always print time */ 751 time(&curtime); 752 tp = localtime(&curtime); 753 if (dateprint) 754 stringprt("%.11s", ctime(&curtime)); 755 stringprt("%d:%02d", tp->tm_hour > 12 ? tp->tm_hour - 12 : 756 (tp->tm_hour == 0 ? 12 : tp->tm_hour), tp->tm_min); 757 if (synch) /* sync with clock */ 758 delay = 60 - tp->tm_sec; 759 /* 760 * Beepable is used to insure that we get at most one set of beeps 761 * every half hour. 762 */ 763 if (beep) 764 if (beepable) { 765 if (tp->tm_min == 30) { 766 tputs(bell, 1, outc); 767 fflush(stdout); 768 beepable = 0; 769 } else if (tp->tm_min == 0) { 770 tputs(bell, 1, outc); 771 fflush(stdout); 772 sleep(2); 773 tputs(bell, 1, outc); 774 fflush(stdout); 775 beepable = 0; 776 } 777 } else 778 if (tp->tm_min != 0 && tp->tm_min != 30) 779 beepable = 1; 780 } 781 782 /* 783 * whocheck -- check for file named .who and print it on the who line first 784 */ 785 whocheck() 786 { 787 int chss; 788 register char *p; 789 char buff[81]; 790 int whofile; 791 792 if ((whofile = open(whofilename, 0)) < 0 && 793 (whofile = open(whofilename2, 0)) < 0) 794 return; 795 chss = read(whofile, buff, sizeof buff - 1); 796 close(whofile); 797 if (chss <= 0) 798 return; 799 buff[chss] = '\0'; 800 /* 801 * Remove all line feeds, and replace by spaces if they are within 802 * the message, else replace them by nulls. 803 */ 804 for (p = buff; *p;) 805 if (*p == '\n') 806 if (p[1]) 807 *p++ = ' '; 808 else 809 *p = '\0'; 810 else 811 p++; 812 stringcat(buff, p - buff); 813 stringspace(); 814 } 815 816 /* 817 * ttyprint -- given the name of a tty, print in the string buffer its 818 * short name surrounded by parenthesis. 819 * ttyxx is printed as (xx) 820 * console is printed as (cty) 821 */ 822 ttyprint(name) 823 char *name; 824 { 825 char buff[11]; 826 827 if (strncmp(name, "tty", 3) == 0) 828 stringprt("(%.*s)", LINESIZE - 3, name + 3); 829 else if (strcmp(name, "console") == 0) 830 stringcat("(cty)", -1); 831 else 832 stringprt("(%.*s)", LINESIZE, name); 833 } 834 835 /* 836 * mail checking function 837 * returns 0 if no mail seen 838 */ 839 mailseen() 840 { 841 FILE *mfd; 842 register n; 843 register char *cp; 844 char lbuf[100], sendbuf[100], *bufend; 845 char seenspace; 846 int retval = 0; 847 848 if (stat(username, &mstbuf) < 0) { 849 mailsize = 0; 850 return 0; 851 } 852 if (mstbuf.st_size <= mailsize || (mfd = fopen(username,"r")) == NULL) { 853 mailsize = mstbuf.st_size; 854 return 0; 855 } 856 fseek(mfd, mailsize, 0); 857 while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0 && 858 strncmp(lbuf, "From ", 5) != 0) 859 ; 860 if (n < 0) { 861 stringcat("Mail has just arrived", 0); 862 goto out; 863 } 864 retval = 1; 865 /* 866 * Found a From line, get second word, which is the sender, 867 * and print it. 868 */ 869 for (cp = lbuf + 5; *cp && *cp != ' '; cp++) /* skip to blank */ 870 ; 871 *cp = '\0'; /* terminate name */ 872 stringspace(); 873 stringprt("Mail from %s ", lbuf + 5); 874 /* 875 * Print subject, and skip over header. 876 */ 877 while ((n = readline(mfd, lbuf, sizeof lbuf)) > 0) 878 if (strncmp(lbuf, "Subject:", 8) == 0) 879 stringprt("on %s ", lbuf + 9); 880 if (!emacs) 881 stringcat(arrows, 2); 882 else 883 stringcat(": ", 2); 884 if (n < 0) /* already at eof */ 885 goto out; 886 /* 887 * Print as much of the letter as we can. 888 */ 889 cp = sendbuf; 890 if ((n = columns - chars) > sizeof sendbuf - 1) 891 n = sizeof sendbuf - 1; 892 bufend = cp + n; 893 seenspace = 0; 894 while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0) { 895 register char *rp; 896 897 if (strncmp(lbuf, "From ", 5) == 0) 898 break; 899 if (cp >= bufend) 900 continue; 901 if (!seenspace) { 902 *cp++ = ' '; /* space before lines */ 903 seenspace = 1; 904 } 905 rp = lbuf; 906 while (*rp && cp < bufend) 907 if (isspace(*rp)) { 908 if (!seenspace) { 909 *cp++ = ' '; 910 seenspace = 1; 911 } 912 rp++; 913 } else { 914 *cp++ = *rp++; 915 seenspace = 0; 916 } 917 } 918 *cp = 0; 919 stringcat(sendbuf, -1); 920 /* 921 * Want to update write time so a star will 922 * appear after the number of users until the 923 * user reads his mail. 924 */ 925 out: 926 mailsize = linebeg; 927 fclose(mfd); 928 touch(username); 929 return retval; 930 } 931 932 /* 933 * readline -- read a line from fp and store it in buf. 934 * return the number of characters read. 935 */ 936 readline(fp, buf, n) 937 register FILE *fp; 938 char *buf; 939 register n; 940 { 941 register c; 942 register char *cp = buf; 943 944 linebeg = ftell(fp); /* remember loc where line begins */ 945 cp = buf; 946 while (--n > 0 && (c = getc(fp)) != EOF && c != '\n') 947 *cp++ = c; 948 *cp = 0; 949 if (c == EOF && cp - buf == 0) 950 return -1; 951 return cp - buf; 952 } 953 954 955 /* 956 * string hacking functions 957 */ 958 959 stringinit() 960 { 961 sp = strarr; 962 chars = 0; 963 } 964 965 /*VARARGS1*/ 966 stringprt(format, a, b, c) 967 char *format; 968 { 969 char tempbuf[150]; 970 971 stringcat(sprintf(tempbuf, format, a, b, c), -1); 972 } 973 974 stringdump() 975 { 976 char bigbuf[sizeof strarr + 200]; 977 register char *bp = bigbuf; 978 register int i; 979 980 if (!emacs) { 981 if (sawmail) 982 bp = strcpy1(bp, bell); 983 if (eslok) 984 bp = strcpy1(bp, tparm(to_status_line, 985 leftline ? 0 : columns - chars)); 986 else { 987 bp = strcpy1(bp, to_status_line); 988 if (!shortline && !leftline) 989 for (i = columns - chars; --i >= 0;) 990 *bp++ = ' '; 991 } 992 if (reverse && revtime != 0) 993 bp = strcpy1(bp, rev_out); 994 } 995 *sp = 0; 996 bp = strcpy1(bp, strarr); 997 if (!emacs) { 998 if (reverse) 999 bp = strcpy1(bp, rev_end); 1000 bp = strcpy1(bp, from_status_line); 1001 if (sawmail) 1002 bp = strcpy1(strcpy1(bp, bell), bell); 1003 *bp = 0; 1004 tputs(bigbuf, 1, outc); 1005 if (mustclear) { 1006 mustclear = 0; 1007 tputs(clr_eol, 1, outc); 1008 } 1009 if (dbug) 1010 putchar('\n'); 1011 fflush(stdout); 1012 } else 1013 write(2, bigbuf, bp - bigbuf); 1014 } 1015 1016 stringspace() 1017 { 1018 if (reverse && revtime != 0) { 1019 #ifdef TERMINFO 1020 stringcat(rev_end, 1021 magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch); 1022 stringcat(" ", 1); 1023 stringcat(rev_out, 1024 magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch); 1025 #else 1026 stringcat(rev_end, 0); 1027 stringcat(" ", 1); 1028 stringcat(rev_out, 0); 1029 #endif TERMINFO 1030 } else 1031 stringcat(" ", 1); 1032 } 1033 1034 /* 1035 * stringcat :: concatenate the characters in string str to the list we are 1036 * building to send out. 1037 * str - the string to print. may contain funny (terminal control) chars. 1038 * n - the number of printable characters in the string 1039 * or if -1 then str is all printable so we can truncate it, 1040 * otherwise don't print only half a string. 1041 */ 1042 stringcat(str, n) 1043 register char *str; 1044 register n; 1045 { 1046 register char *p = sp; 1047 1048 if (n < 0) { /* truncate */ 1049 n = columns - chars; 1050 while ((*p++ = *str++) && --n >= 0) 1051 ; 1052 p--; 1053 chars += p - sp; 1054 sp = p; 1055 } else if (chars + n <= columns) { /* don't truncate */ 1056 while (*p++ = *str++) 1057 ; 1058 chars += n; 1059 sp = p - 1; 1060 } 1061 } 1062 1063 /* 1064 * touch :: update the modify time of a file. 1065 */ 1066 touch(name) 1067 char *name; /* name of file */ 1068 { 1069 register fd; 1070 char buf; 1071 1072 if ((fd = open(name, 2)) >= 0) { 1073 read(fd, &buf, 1); /* get first byte */ 1074 lseek(fd, 0L, 0); /* go to beginning */ 1075 write(fd, &buf, 1); /* and rewrite first byte */ 1076 close(fd); 1077 } 1078 } 1079 1080 1081 /* 1082 * clearbotl :: clear bottom line. 1083 * called when process quits or is killed. 1084 * it clears the bottom line of the terminal. 1085 */ 1086 clearbotl() 1087 { 1088 register int fd; 1089 int exit(); 1090 1091 signal(SIGALRM, exit); 1092 alarm(30); /* if can't open in 30 secs, just die */ 1093 if (!emacs && (fd = open(ourtty, 1)) >= 0) { 1094 write(fd, dis_status_line, strlen(dis_status_line)); 1095 close(fd); 1096 } 1097 #ifdef PROF 1098 if (chdir("/usr/src/ucb/sysline") < 0) 1099 (void) chdir("/tmp"); 1100 #endif 1101 exit(0); 1102 } 1103 1104 #ifdef TERMINFO 1105 initterm() 1106 { 1107 static char standbuf[40]; 1108 1109 setupterm(0, 1, 0); 1110 if (!window && !has_status_line) { 1111 /* not an appropriate terminal */ 1112 if (!quiet) 1113 fprintf(stderr, "sysline: no status capability for %s\n", 1114 getenv("TERM")); 1115 exit(1); 1116 } 1117 if (window || status_line_esc_ok) { 1118 if (set_attributes) { 1119 /* reverse video mode */ 1120 strcpy(standbuf, 1121 tparm(set_attributes,0,0,1,0,0,0,0,0,0)); 1122 rev_out = standbuf; 1123 rev_end = exit_attribute_mode; 1124 } else if (enter_standout_mode && exit_standout_mode) { 1125 rev_out = enter_standout_mode; 1126 rev_end = exit_standout_mode; 1127 } else 1128 rev_out = rev_end = ""; 1129 } else 1130 rev_out = rev_end = ""; 1131 columns--; /* avoid cursor wraparound */ 1132 } 1133 1134 #else /* TERMCAP */ 1135 1136 initterm() 1137 { 1138 char *term, *cp; 1139 static char tbuf[1024]; 1140 char is2[40]; 1141 extern char *UP; 1142 1143 if ((term = getenv("TERM")) == NULL) { 1144 if (!quiet) 1145 fprintf(stderr, 1146 "sysline: No TERM variable in enviroment\n"); 1147 exit(1); 1148 } 1149 if (tgetent(tbuf, term) <= 0) { 1150 if (!quiet) 1151 fprintf(stderr, 1152 "sysline: Unknown terminal type: %s\n", term); 1153 exit(1); 1154 } 1155 if (!window && tgetflag("hs") <= 0) { 1156 if (!strncmp(term, "h19", 3)) { 1157 /* for upward compatability with h19sys */ 1158 strcpy(to_status_line, 1159 "\033j\033x5\033x1\033Y8%+ \033o"); 1160 strcpy(from_status_line, "\033k\033y5"); 1161 strcpy(dis_status_line, "\033y1"); 1162 strcpy(rev_out, "\033p"); 1163 strcpy(rev_end, "\033q"); 1164 arrows = "\033Fhh\033G"; 1165 columns = 80; 1166 UP = "\b"; 1167 return; 1168 } 1169 if (!quiet) 1170 fprintf(stderr, 1171 "sysline: No status capability for %s\n", term); 1172 exit(1); 1173 } 1174 cp = is2; 1175 if (tgetstr("i2", &cp) != NULL) { 1176 /* someday tset will do this */ 1177 tputs(is2, 1, erroutc); 1178 fflush(stdout); 1179 } 1180 1181 /* the "-1" below is to avoid cursor wraparound problems */ 1182 columns = tgetnum("co") - 1; 1183 if (window) { 1184 strcpy(to_status_line, "\r"); 1185 strcpy(from_status_line, ""); 1186 cp = dis_status_line; /* use the clear line sequence */ 1187 *cp++ = '\r'; 1188 tgetstr("ce", &cp); 1189 } else { 1190 cp = to_status_line; 1191 tgetstr("ts", &cp); 1192 cp = from_status_line; 1193 tgetstr("fs", &cp); 1194 cp = dis_status_line; 1195 tgetstr("ds", &cp); 1196 eslok = tgetflag("es"); 1197 } 1198 if (eslok || window) { 1199 cp = rev_out; 1200 tgetstr("so", &cp); 1201 cp = rev_end; 1202 tgetstr("se", &cp); 1203 cp = clr_eol; 1204 tgetstr("ce", &cp); 1205 } else 1206 reverse = 0; /* turn off reverse video */ 1207 UP = "\b"; 1208 if (!strncmp(term, "h19", 3)) 1209 arrows = "\033Fhh\033G"; /* "two tiny graphic arrows" */ 1210 else 1211 arrows = "->"; 1212 } 1213 #endif TERMINFO 1214 1215 #ifdef pdp11 1216 loadav(ap) 1217 double ap[]; 1218 { 1219 register int i; 1220 short s_avenrun[3]; 1221 1222 lseek(kmem, (long)nl[NL_AVEN].n_value, 0); 1223 read(kmem, s_avenrun, sizeof(s_avenrun)); 1224 for (i=0; i < (sizeof(s_avenrun)/sizeof(s_avenrun[0])); i++) 1225 ap[i] = s_avenrun[i] / 256.0; 1226 } 1227 #endif 1228 1229 #ifdef RWHO 1230 char * 1231 sysrup(hp) 1232 register struct remotehost *hp; 1233 { 1234 char filename[100]; 1235 struct whod wd; 1236 static char buffer[50]; 1237 time_t now; 1238 1239 /* 1240 * rh_file is initially 0. 1241 * This is ok since standard input is assumed to exist. 1242 */ 1243 if (hp->rh_file == 0) { 1244 /* 1245 * Try rwho hostname file, and if that fails try ucbhostname. 1246 */ 1247 (void) strcpy1(strcpy1(filename, RWHOLEADER), hp->rh_host); 1248 if ((hp->rh_file = open(filename, 0)) < 0) { 1249 (void) strcpy1(strcpy1(strcpy1(filename, RWHOLEADER), 1250 NETPREFIX), hp->rh_host); 1251 hp->rh_file = open(filename, 0); 1252 } 1253 } 1254 if (hp->rh_file < 0) 1255 return sprintf(buffer, "%s?", hp->rh_host); 1256 (void) lseek(hp->rh_file, (off_t)0, 0); 1257 if (read(hp->rh_file, (char *)&wd, sizeof wd) != sizeof wd) 1258 return sprintf(buffer, "%s ?", hp->rh_host); 1259 (void) time(&now); 1260 if (now - wd.wd_recvtime > DOWN_THRESHOLD) { 1261 long interval; 1262 long days, hours, minutes; 1263 1264 interval = now - wd.wd_recvtime; 1265 minutes = (interval + 59) / 60; /* round to minutes */ 1266 hours = minutes / 60; /* extract hours from minutes */ 1267 minutes %= 60; /* remove hours from minutes */ 1268 days = hours / 24; /* extract days from hours */ 1269 hours %= 24; /* remove days from hours */ 1270 if (days > 7 || days < 0) 1271 (void) sprintf(buffer, "%s down", hp->rh_host); 1272 else if (days > 0) 1273 (void) sprintf(buffer, "%s %d+%d:%02d", 1274 hp->rh_host, days, hours, minutes); 1275 else 1276 (void) sprintf(buffer, "%s %d:%02d", 1277 hp->rh_host, hours, minutes); 1278 } else 1279 (void) sprintf(buffer, "%s %.1f", 1280 hp->rh_host, wd.wd_loadav[0]/100.0); 1281 return buffer; 1282 } 1283 #endif RWHO 1284 1285 getwinsize() 1286 { 1287 #ifdef TIOCGWINSZ 1288 struct winsize winsize; 1289 1290 /* the "-1" below is to avoid cursor wraparound problems */ 1291 if (ioctl(2, TIOCGWINSZ, (char *)&winsize) >= 0 && winsize.ws_col != 0) 1292 columns = winsize.ws_col - 1; 1293 #endif 1294 } 1295 1296 #ifdef SIGWINCH 1297 sigwinch() 1298 { 1299 winchanged++; 1300 } 1301 #endif 1302 1303 char * 1304 strcpy1(p, q) 1305 register char *p, *q; 1306 { 1307 1308 while (*p++ = *q++) 1309 ; 1310 return p - 1; 1311 } 1312 1313 outc(c) 1314 char c; 1315 { 1316 if (dbug) 1317 printf("%s", unctrl(c)); 1318 else 1319 putchar(c); 1320 } 1321 1322 erroutc(c) 1323 char c; 1324 { 1325 if (dbug) 1326 fprintf(stderr, "%s", unctrl(c)); 1327 else 1328 putc(c, stderr); 1329 } 1330