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 5.1 (Berkeley) 06/06/85"; 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 #define DOWN_THRESHOLD (11 * 60) 100 #define RWHOLEADER "/usr/spool/rwho/whod." 101 102 struct whod { 103 char wd_vers; 104 char wd_type; 105 char wd_fill[2]; 106 int wd_sendtime; 107 int wd_recvtime; 108 char wd_hostname[32]; 109 int wd_loadav[3]; 110 int wd_boottime; 111 }; 112 113 struct remotehost { 114 char *rh_host; 115 int rh_file; 116 } remotehost[10]; 117 int nremotes = 0; 118 #endif RWHO 119 120 struct nlist nl[] = { 121 #ifdef NEW_BOOTTIME 122 { "_boottime" }, /* After 4.1a the label changed to "boottime" */ 123 #else 124 { "_bootime" }, /* Under 4.1a and earlier it is "bootime" */ 125 #endif 126 #define NL_BOOT 0 127 { "_proc" }, 128 #define NL_PROC 1 129 { "_avenrun" }, 130 #define NL_AVEN 2 131 #ifdef VMUNIX 132 { "_nproc" }, 133 #define NL_NPROC 3 134 #endif 135 0 136 }; 137 138 /* stuff for the kernel */ 139 int kmem; /* file descriptor for /dev/kmem */ 140 struct proc *proc, *procNPROC; 141 int nproc; 142 int procadr; 143 double avenrun[3]; /* used for storing load averages */ 144 145 /* 146 * In order to determine how many people are logged on and who has 147 * logged in or out, we read in the /etc/utmp file. We also keep track of 148 * the previous utmp file. 149 */ 150 int ut; /* the file descriptor */ 151 struct utmp *new, *old; 152 char *status; /* per tty status bits, see below */ 153 int nentries; /* number of utmp entries */ 154 /* string lengths for printing */ 155 #define LINESIZE (sizeof old->ut_line) 156 #define NAMESIZE (sizeof old->ut_name) 157 /* 158 * Status codes to say what has happened to a particular entry in utmp. 159 * NOCH means no change, ON means new person logged on, 160 * OFF means person logged off. 161 */ 162 #define NOCH 0 163 #define ON 0x1 164 #define OFF 0x2 165 166 #ifdef WHO 167 char whofilename[100]; 168 char whofilename2[100]; 169 #endif 170 171 #ifdef HOSTNAME 172 char hostname[33]; /* one more for null termination */ 173 #endif 174 175 char lockfilename[100]; /* if exists, will prevent us from running */ 176 177 /* flags which determine which info is printed */ 178 int mailcheck = 1; /* m - do biff like checking of mail */ 179 int proccheck = 1; /* p - give information on processes */ 180 int logcheck = 1; /* l - tell who logs in and out */ 181 int hostprint = 0; /* h - print out hostname */ 182 int dateprint = 0; /* h - print out day/date */ 183 int quiet = 0; /* q - hush diagnostic messages */ 184 185 /* flags which determine how things are printed */ 186 int clr_bet_ref = 0; /* c - clear line between refeshes */ 187 int reverse = 1; /* r - use reverse video */ 188 int shortline = 0; /* s - short (left-justified) if escapes not allowed */ 189 int leftline = 0; /* j - left-justified even if escapes allowed */ 190 191 /* flags which have terminal do random things */ 192 int beep = 0; /* b - beep every half hour and twice every hour */ 193 int printid = 0; /* i - print pid of this process at startup */ 194 int synch = 1; /* synchronize with clock */ 195 196 /* select output device (status display or straight output) */ 197 int emacs = 0; /* e - assume status display */ 198 int window = 0; /* w - window mode */ 199 int dbug = 0; /* d - debug */ 200 201 /* 202 * used to turn off reverse video every REVOFF times 203 * in an attempt to not wear out the phospher. 204 */ 205 #define REVOFF 5 206 int revtime = 1; 207 208 /* used by mail checker */ 209 off_t mailsize = 0; 210 off_t linebeg = 0; /* place where we last left off reading */ 211 212 /* things used by the string routines */ 213 int chars; /* number of printable characters */ 214 char *sp; 215 char strarr[512]; /* big enough now? */ 216 /* flags to stringdump() */ 217 char sawmail; /* remember mail was seen to print bells */ 218 char mustclear; /* status line messed up */ 219 220 /* strings which control status line display */ 221 #ifdef TERMINFO 222 char *rev_out, *rev_end, *arrows; 223 char *tparm(); 224 #else 225 char to_status_line[64]; 226 char from_status_line[64]; 227 char dis_status_line[64]; 228 char clr_eol[64]; 229 char rev_out[20], rev_end[20]; 230 char *arrows, *bell = "\007"; 231 int eslok; /* escapes on status line okay (reverse, cursor addressing) */ 232 int columns; 233 #define tparm(cap, parm) tgoto((cap), 0, (parm)) 234 char *tgoto(); 235 #endif 236 237 /* to deal with window size changes */ 238 #ifdef SIGWINCH 239 int sigwinch(); 240 char winchanged; /* window size has changed since last update */ 241 #endif 242 243 /* random globals */ 244 char *username; 245 char *ourtty; /* keep track of what tty we're on */ 246 struct stat stbuf, mstbuf; /* mstbuf for mail check only */ 247 unsigned delay = DEFDELAY; 248 short uid; 249 double loadavg = 0.0; /* current load average */ 250 int users = 0; 251 252 char *getenv(); 253 char *ttyname(); 254 char *strcpy1(); 255 char *sysrup(); 256 char *calloc(); 257 char *malloc(); 258 int outc(); 259 int erroutc(); 260 261 main(argc,argv) 262 register char **argv; 263 { 264 int clearbotl(); 265 register char *cp; 266 char *home; 267 extern char _sobuf[]; 268 269 setbuf(stdout, _sobuf); 270 271 #ifdef HOSTNAME 272 gethostname(hostname, sizeof hostname - 1); 273 #endif 274 275 for (argv++; *argv != 0; argv++) 276 switch (**argv) { 277 case '-': 278 for (cp = *argv + 1; *cp; cp++) { 279 switch(*cp) { 280 case 'r' : /* turn off reverse video */ 281 reverse = 0; 282 break; 283 case 'c': 284 clr_bet_ref = 1; 285 break; 286 case 'h': 287 hostprint = 1; 288 break; 289 case 'D': 290 dateprint = 1; 291 break; 292 #ifdef RWHO 293 case 'H': 294 if (argv[1] == 0) 295 break; 296 argv++; 297 if (strcmp(hostname, *argv) && 298 strcmp(&hostname[sizeof NETPREFIX - 1], *argv)) 299 remotehost[nremotes++].rh_host = *argv; 300 break; 301 #endif RWHO 302 case 'm': 303 mailcheck = 0; 304 break; 305 case 'p': 306 proccheck = 0; 307 break; 308 case 'l': 309 logcheck = 0; 310 break; 311 case 'b': 312 beep = 1; 313 break; 314 case 'i': 315 printid = 1; 316 break; 317 case 'w': 318 window = 1; 319 break; 320 case 'e': 321 emacs = 1; 322 break; 323 case 'd': 324 dbug = 1; 325 break; 326 case 'q': 327 quiet = 1; 328 break; 329 case 's': 330 shortline = 1; 331 break; 332 case 'j': 333 leftline = 1; 334 break; 335 default: 336 fprintf(stderr, 337 "sysline: bad flag: %c\n", *cp); 338 } 339 } 340 break; 341 case '+': 342 delay = atoi(*argv + 1); 343 if (delay < 10) 344 delay = 10; 345 else if (delay > 500) 346 delay = 500; 347 synch = 0; /* no more sync */ 348 break; 349 default: 350 fprintf(stderr, "sysline: illegal argument %s\n", 351 argv[0]); 352 } 353 if (emacs) { 354 reverse = 0; 355 columns = 79; 356 } else /* if not to emacs window, initialize terminal dependent info */ 357 initterm(); 358 #ifdef SIGWINCH 359 /* 360 * When the window size changes and we are the foreground 361 * process (true if -w), we get this signal. 362 */ 363 signal(SIGWINCH, sigwinch); 364 #endif 365 getwinsize(); /* get window size from ioctl */ 366 367 /* immediately fork and let the parent die if not emacs mode */ 368 if (!emacs && !window && !dbug) { 369 if (fork()) 370 exit(0); 371 /* pgrp should take care of things, but ignore them anyway */ 372 signal(SIGINT, SIG_IGN); 373 signal(SIGQUIT, SIG_IGN); 374 #ifdef VMUNIX 375 signal(SIGTTOU, SIG_IGN); 376 #endif 377 } 378 /* 379 * When we logoff, init will do a "vhangup()" on this 380 * tty which turns off I/O access and sends a SIGHUP 381 * signal. We catch this and thereby clear the status 382 * display. Note that a bug in 4.1bsd caused the SIGHUP 383 * signal to be sent to the wrong process, so you had to 384 * `kill -HUP' yourself in your .logout file. 385 * Do the same thing for SIGTERM, which is the default kill 386 * signal. 387 */ 388 signal(SIGHUP, clearbotl); 389 signal(SIGTERM, clearbotl); 390 /* 391 * This is so kill -ALRM to force update won't screw us up.. 392 */ 393 signal(SIGALRM, SIG_IGN); 394 395 uid = getuid(); 396 ourtty = ttyname(2); /* remember what tty we are on */ 397 if (printid) { 398 printf("%d\n", getpid()); 399 fflush(stdout); 400 } 401 dup2(2, 1); 402 403 if ((home = getenv("HOME")) == 0) 404 home = ""; 405 strcpy1(strcpy1(whofilename, home), "/.who"); 406 strcpy1(strcpy1(whofilename2, home), "/.sysline"); 407 strcpy1(strcpy1(lockfilename, home), "/.syslinelock"); 408 409 if ((kmem = open("/dev/kmem",0)) < 0) { 410 fprintf(stderr, "Can't open kmem.\n"); 411 exit(1); 412 } 413 readnamelist(); 414 if (proccheck) 415 initprocread(); 416 initutmp(); 417 if (mailcheck) 418 if ((username = getenv("USER")) == 0) 419 mailcheck = 0; 420 else { 421 chdir(MAILDIR); 422 if (stat(username, &mstbuf) >= 0) 423 mailsize = mstbuf.st_size; 424 else 425 mailsize = 0; 426 } 427 428 while (emacs || window || isloggedin()) 429 if (access(lockfilename, 0) >= 0) 430 sleep(60); 431 else { 432 prtinfo(); 433 sleep(delay); 434 if (clr_bet_ref) { 435 tputs(dis_status_line, 1, outc); 436 fflush(stdout); 437 sleep(5); 438 } 439 revtime = (1 + revtime) % REVOFF; 440 } 441 clearbotl(); 442 /*NOTREACHED*/ 443 } 444 445 isloggedin() 446 { 447 /* 448 * you can tell if a person has logged out if the owner of 449 * the tty has changed 450 */ 451 struct stat statbuf; 452 453 return fstat(2, &statbuf) == 0 && statbuf.st_uid == uid; 454 } 455 456 readnamelist() 457 { 458 time_t bootime, clock, nintv, time(); 459 460 #ifdef pdp11 461 nlist("/unix", nl); 462 #else 463 nlist("/vmunix", nl); 464 #endif 465 if (nl[0].n_value == 0) { 466 if (!quiet) 467 fprintf(stderr, "No namelist\n"); 468 return; 469 } 470 lseek(kmem, (long)nl[NL_BOOT].n_value, 0); 471 read(kmem, &bootime, sizeof(bootime)); 472 (void) time(&clock); 473 nintv = clock - bootime; 474 if (nintv <= 0L || nintv > 60L*60L*24L*365L) { 475 if (!quiet) 476 fprintf(stderr, 477 "Time makes no sense... namelist must be wrong\n"); 478 nl[NL_PROC].n_value = nl[NL_AVEN].n_value = 0; 479 } 480 } 481 482 initutmp() 483 { 484 struct stat st; 485 486 if ((ut = open("/etc/utmp", 0)) < 0) { 487 fprintf(stderr, "Can't open utmp.\n"); 488 exit(1); 489 } 490 if (fstat(ut, &st) < 0) { 491 perror("fstat: utmp"); 492 exit(1); 493 } 494 /* 495 * Calculate the size once and allocate buffer space. 496 * Utmp is not expected to grow or shrink. 497 */ 498 nentries = st.st_size / sizeof (struct utmp); 499 if ((old = (struct utmp *)calloc(nentries, sizeof *old)) == 0 || 500 (new = (struct utmp *)calloc(nentries, sizeof *new)) == 0 || 501 (status = calloc(nentries, sizeof *status)) == 0) { 502 fprintf(stderr, "Out of memory.\n"); 503 exit(1); 504 } 505 } 506 507 readutmp(u) 508 struct utmp *u; 509 { 510 static time_t lastmod; /* initially zero */ 511 struct stat st; 512 513 if (fstat(ut, &st) >= 0 && st.st_mtime == lastmod) 514 return 0; 515 lastmod = st.st_mtime; 516 lseek(ut, 0L, 0); 517 (void) read(ut, (char *)u, nentries * sizeof *u); 518 return 1; 519 } 520 521 /* 522 * read in the process table locations and sizes, and allocate space 523 * for storing the process table. This is done only once. 524 */ 525 initprocread() 526 { 527 528 if (nl[NL_PROC].n_value == 0) 529 return; 530 #ifdef VMUNIX 531 lseek(kmem, (long)nl[NL_PROC].n_value, 0); 532 read(kmem, &procadr, sizeof procadr); 533 lseek(kmem, (long)nl[NL_NPROC].n_value, 0); 534 read(kmem, &nproc, sizeof nproc); 535 #endif 536 #ifdef pdp11 537 procadr = nl[NL_PROC].n_value; 538 nproc = NPROC; /* from param.h */ 539 #endif 540 if ((proc = (struct proc *) calloc(nproc, sizeof (struct proc))) == 0) { 541 fprintf(stderr, "Out of memory.\n"); 542 exit(1); 543 } 544 procNPROC = proc + nproc; 545 } 546 547 /* 548 * read in the process table. This assumes that initprocread has alread been 549 * called to set up storage. 550 */ 551 readproctab() 552 { 553 554 if (nl[NL_PROC].n_value == 0) 555 return (0); 556 lseek(kmem, (long)procadr, 0); 557 read(kmem, (char *)proc, nproc * sizeof (struct proc)); 558 return (1); 559 } 560 561 prtinfo() 562 { 563 int on, off; 564 register i; 565 char fullprocess; 566 567 stringinit(); 568 #ifdef SIGWINCH 569 if (winchanged) { 570 winchanged = 0; 571 getwinsize(); 572 mustclear = 1; 573 } 574 #endif 575 #ifdef WHO 576 /* check for file named .who in the home directory */ 577 whocheck(); 578 #endif 579 timeprint(); 580 /* 581 * if mail is seen, don't print rest of info, just the mail 582 * reverse new and old so that next time we run, we won't lose log 583 * in and out information 584 */ 585 if (mailcheck && (sawmail = mailseen())) 586 goto bottom; 587 #ifdef HOSTNAME 588 #ifdef RWHO 589 for (i = 0; i < nremotes; i++) { 590 char *tmp; 591 592 stringspace(); 593 tmp = sysrup(remotehost + i); 594 stringcat(tmp, strlen(tmp)); 595 } 596 #endif 597 /* 598 * print hostname info if requested 599 */ 600 if (hostprint) { 601 stringspace(); 602 stringcat(hostname, -1); 603 } 604 #endif 605 /* 606 * print load average and difference between current load average 607 * and the load average 5 minutes ago 608 */ 609 if (nl[NL_AVEN].n_value != 0) { 610 double diff; 611 612 stringspace(); 613 #ifdef VMUNIX 614 lseek(kmem, (long)nl[NL_AVEN].n_value, 0); 615 read(kmem, avenrun, sizeof avenrun); 616 #endif 617 #ifdef pdp11 618 loadav(avenrun); 619 #endif 620 if ((diff = avenrun[0] - avenrun[1]) < 0.0) 621 stringprt("%.1f %.1f", avenrun[0], diff); 622 else 623 stringprt("%.1f +%.1f", avenrun[0], diff); 624 loadavg = avenrun[0]; /* remember load average */ 625 } 626 /* 627 * print log on and off information 628 */ 629 stringspace(); 630 fullprocess = 1; 631 #ifdef MAXLOAD 632 if (loadavg > MAXLOAD) 633 fullprocess = 0; /* too loaded to run */ 634 #endif 635 /* 636 * Read utmp file (logged in data) only if we are doing a full 637 * process, or if this is the first time and we are calculating 638 * the number of users. 639 */ 640 on = off = 0; 641 if (users == 0) { /* first time */ 642 if (readutmp(old)) 643 for (i = 0; i < nentries; i++) 644 if (old[i].ut_name[0]) 645 users++; 646 } else if (fullprocess && readutmp(new)) { 647 struct utmp *tmp; 648 649 users = 0; 650 for (i = 0; i < nentries; i++) { 651 if (strncmp(old[i].ut_name, 652 new[i].ut_name, NAMESIZE) == 0) 653 status[i] = NOCH; 654 else if (old[i].ut_name[0] == '\0') { 655 status[i] = ON; 656 on++; 657 } else if (new[i].ut_name[0] == '\0') { 658 status[i] = OFF; 659 off++; 660 } else { 661 status[i] = ON | OFF; 662 on++; 663 off++; 664 } 665 if (new[i].ut_name[0]) 666 users++; 667 } 668 tmp = new; 669 new = old; 670 old = tmp; 671 } 672 /* 673 * Print: 674 * 1. number of users 675 * 2. a * for unread mail 676 * 3. a - if load is too high 677 * 4. number of processes running and stopped 678 */ 679 stringprt("%du", users); 680 if (mailsize > 0 && mstbuf.st_mtime >= mstbuf.st_atime) 681 stringcat("*", -1); 682 if (!fullprocess && (proccheck || logcheck)) 683 stringcat("-", -1); 684 if (fullprocess && proccheck && readproctab()) { 685 register struct proc *p; 686 int procrun, procstop; 687 688 /* 689 * We are only interested in processes which have the same 690 * uid as us, and whose parent process id is not 1. 691 */ 692 procrun = procstop = 0; 693 for (p = proc; p < procNPROC; p++) { 694 if (p->p_stat == 0 || p->p_pgrp == 0 || 695 p->p_uid != uid || p->p_ppid == 1) 696 continue; 697 switch (p->p_stat) { 698 case SSTOP: 699 procstop++; 700 break; 701 case SSLEEP: 702 /* 703 * Sleep can mean waiting for a signal or just 704 * in a disk or page wait queue ready to run. 705 * We can tell if it is the later by the pri 706 * being negative. 707 */ 708 if (p->p_pri < PZERO) 709 procrun++; 710 break; 711 case SWAIT: 712 case SRUN: 713 case SIDL: 714 procrun++; 715 } 716 } 717 if (procrun > 0 || procstop > 0) { 718 stringspace(); 719 if (procrun > 0 && procstop > 0) 720 stringprt("%dr %ds", procrun, procstop); 721 else if (procrun > 0) 722 stringprt("%dr", procrun); 723 else 724 stringprt("%ds", procstop); 725 } 726 } 727 /* 728 * If anyone has logged on or off, and we are interested in it, 729 * print it out. 730 */ 731 if (logcheck) { 732 /* old and new have already been swapped */ 733 if (on) { 734 stringspace(); 735 stringcat("on:", -1); 736 for (i = 0; i < nentries; i++) 737 if (status[i] & ON) { 738 stringprt(" %.8s", old[i].ut_name); 739 ttyprint(old[i].ut_line); 740 } 741 } 742 if (off) { 743 stringspace(); 744 stringcat("off:", -1); 745 for (i = 0; i < nentries; i++) 746 if (status[i] & OFF) { 747 stringprt(" %.8s", new[i].ut_name); 748 ttyprint(new[i].ut_line); 749 } 750 } 751 } 752 bottom: 753 /* dump out what we know */ 754 stringdump(); 755 } 756 757 timeprint() 758 { 759 long curtime; 760 struct tm *tp, *localtime(); 761 static int beepable = 1; 762 763 /* always print time */ 764 time(&curtime); 765 tp = localtime(&curtime); 766 if (dateprint) 767 stringprt("%.11s", ctime(&curtime)); 768 stringprt("%d:%02d", tp->tm_hour > 12 ? tp->tm_hour - 12 : 769 (tp->tm_hour == 0 ? 12 : tp->tm_hour), tp->tm_min); 770 if (synch) /* sync with clock */ 771 delay = 60 - tp->tm_sec; 772 /* 773 * Beepable is used to insure that we get at most one set of beeps 774 * every half hour. 775 */ 776 if (beep) 777 if (beepable) { 778 if (tp->tm_min == 30) { 779 tputs(bell, 1, outc); 780 fflush(stdout); 781 beepable = 0; 782 } else if (tp->tm_min == 0) { 783 tputs(bell, 1, outc); 784 fflush(stdout); 785 sleep(2); 786 tputs(bell, 1, outc); 787 fflush(stdout); 788 beepable = 0; 789 } 790 } else 791 if (tp->tm_min != 0 && tp->tm_min != 30) 792 beepable = 1; 793 } 794 795 /* 796 * whocheck -- check for file named .who and print it on the who line first 797 */ 798 whocheck() 799 { 800 int chss; 801 register char *p; 802 char buff[81]; 803 int whofile; 804 805 if ((whofile = open(whofilename, 0)) < 0 && 806 (whofile = open(whofilename2, 0)) < 0) 807 return; 808 chss = read(whofile, buff, sizeof buff - 1); 809 close(whofile); 810 if (chss <= 0) 811 return; 812 buff[chss] = '\0'; 813 /* 814 * Remove all line feeds, and replace by spaces if they are within 815 * the message, else replace them by nulls. 816 */ 817 for (p = buff; *p;) 818 if (*p == '\n') 819 if (p[1]) 820 *p++ = ' '; 821 else 822 *p = '\0'; 823 else 824 p++; 825 stringcat(buff, p - buff); 826 stringspace(); 827 } 828 829 /* 830 * ttyprint -- given the name of a tty, print in the string buffer its 831 * short name surrounded by parenthesis. 832 * ttyxx is printed as (xx) 833 * console is printed as (cty) 834 */ 835 ttyprint(name) 836 char *name; 837 { 838 char buff[11]; 839 840 if (strncmp(name, "tty", 3) == 0) 841 stringprt("(%.*s)", LINESIZE - 3, name + 3); 842 else if (strcmp(name, "console") == 0) 843 stringcat("(cty)", -1); 844 else 845 stringprt("(%.*s)", LINESIZE, name); 846 } 847 848 /* 849 * mail checking function 850 * returns 0 if no mail seen 851 */ 852 mailseen() 853 { 854 FILE *mfd; 855 register n; 856 register char *cp; 857 char lbuf[100], sendbuf[100], *bufend; 858 char seenspace; 859 int retval = 0; 860 861 if (stat(username, &mstbuf) < 0) { 862 mailsize = 0; 863 return 0; 864 } 865 if (mstbuf.st_size <= mailsize || (mfd = fopen(username,"r")) == NULL) { 866 mailsize = mstbuf.st_size; 867 return 0; 868 } 869 fseek(mfd, mailsize, 0); 870 while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0 && 871 strncmp(lbuf, "From ", 5) != 0) 872 ; 873 if (n < 0) { 874 stringcat("Mail has just arrived", 0); 875 goto out; 876 } 877 retval = 1; 878 /* 879 * Found a From line, get second word, which is the sender, 880 * and print it. 881 */ 882 for (cp = lbuf + 5; *cp && *cp != ' '; cp++) /* skip to blank */ 883 ; 884 *cp = '\0'; /* terminate name */ 885 stringspace(); 886 stringprt("Mail from %s ", lbuf + 5); 887 /* 888 * Print subject, and skip over header. 889 */ 890 while ((n = readline(mfd, lbuf, sizeof lbuf)) > 0) 891 if (strncmp(lbuf, "Subject:", 8) == 0) 892 stringprt("on %s ", lbuf + 9); 893 if (!emacs) 894 stringcat(arrows, 2); 895 else 896 stringcat(": ", 2); 897 if (n < 0) /* already at eof */ 898 goto out; 899 /* 900 * Print as much of the letter as we can. 901 */ 902 cp = sendbuf; 903 if ((n = columns - chars) > sizeof sendbuf - 1) 904 n = sizeof sendbuf - 1; 905 bufend = cp + n; 906 seenspace = 0; 907 while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0) { 908 register char *rp; 909 910 if (strncmp(lbuf, "From ", 5) == 0) 911 break; 912 if (cp >= bufend) 913 continue; 914 if (!seenspace) { 915 *cp++ = ' '; /* space before lines */ 916 seenspace = 1; 917 } 918 rp = lbuf; 919 while (*rp && cp < bufend) 920 if (isspace(*rp)) { 921 if (!seenspace) { 922 *cp++ = ' '; 923 seenspace = 1; 924 } 925 rp++; 926 } else { 927 *cp++ = *rp++; 928 seenspace = 0; 929 } 930 } 931 *cp = 0; 932 stringcat(sendbuf, -1); 933 /* 934 * Want to update write time so a star will 935 * appear after the number of users until the 936 * user reads his mail. 937 */ 938 out: 939 mailsize = linebeg; 940 fclose(mfd); 941 touch(username); 942 return retval; 943 } 944 945 /* 946 * readline -- read a line from fp and store it in buf. 947 * return the number of characters read. 948 */ 949 readline(fp, buf, n) 950 register FILE *fp; 951 char *buf; 952 register n; 953 { 954 register c; 955 register char *cp = buf; 956 957 linebeg = ftell(fp); /* remember loc where line begins */ 958 cp = buf; 959 while (--n > 0 && (c = getc(fp)) != EOF && c != '\n') 960 *cp++ = c; 961 *cp = 0; 962 if (c == EOF && cp - buf == 0) 963 return -1; 964 return cp - buf; 965 } 966 967 968 /* 969 * string hacking functions 970 */ 971 972 stringinit() 973 { 974 sp = strarr; 975 chars = 0; 976 } 977 978 /*VARARGS1*/ 979 stringprt(format, a, b, c) 980 char *format; 981 { 982 char tempbuf[150]; 983 984 stringcat(sprintf(tempbuf, format, a, b, c), -1); 985 } 986 987 stringdump() 988 { 989 char bigbuf[sizeof strarr + 200]; 990 register char *bp = bigbuf; 991 register int i; 992 993 if (!emacs) { 994 if (sawmail) 995 bp = strcpy1(bp, bell); 996 if (eslok) 997 bp = strcpy1(bp, tparm(to_status_line, 998 leftline ? 0 : columns - chars)); 999 else { 1000 bp = strcpy1(bp, to_status_line); 1001 if (!shortline && !leftline) 1002 for (i = columns - chars; --i >= 0;) 1003 *bp++ = ' '; 1004 } 1005 if (reverse && revtime != 0) 1006 bp = strcpy1(bp, rev_out); 1007 } 1008 *sp = 0; 1009 bp = strcpy1(bp, strarr); 1010 if (!emacs) { 1011 if (reverse) 1012 bp = strcpy1(bp, rev_end); 1013 bp = strcpy1(bp, from_status_line); 1014 if (sawmail) 1015 bp = strcpy1(strcpy1(bp, bell), bell); 1016 *bp = 0; 1017 tputs(bigbuf, 1, outc); 1018 if (mustclear) { 1019 mustclear = 0; 1020 tputs(clr_eol, 1, outc); 1021 } 1022 if (dbug) 1023 putchar('\n'); 1024 fflush(stdout); 1025 } else 1026 write(2, bigbuf, bp - bigbuf); 1027 } 1028 1029 stringspace() 1030 { 1031 if (reverse && revtime != 0) { 1032 #ifdef TERMINFO 1033 stringcat(rev_end, 1034 magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch); 1035 stringcat(" ", 1); 1036 stringcat(rev_out, 1037 magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch); 1038 #else 1039 stringcat(rev_end, 0); 1040 stringcat(" ", 1); 1041 stringcat(rev_out, 0); 1042 #endif TERMINFO 1043 } else 1044 stringcat(" ", 1); 1045 } 1046 1047 /* 1048 * stringcat :: concatenate the characters in string str to the list we are 1049 * building to send out. 1050 * str - the string to print. may contain funny (terminal control) chars. 1051 * n - the number of printable characters in the string 1052 * or if -1 then str is all printable so we can truncate it, 1053 * otherwise don't print only half a string. 1054 */ 1055 stringcat(str, n) 1056 register char *str; 1057 register n; 1058 { 1059 register char *p = sp; 1060 1061 if (n < 0) { /* truncate */ 1062 n = columns - chars; 1063 while ((*p++ = *str++) && --n >= 0) 1064 ; 1065 p--; 1066 chars += p - sp; 1067 sp = p; 1068 } else if (chars + n <= columns) { /* don't truncate */ 1069 while (*p++ = *str++) 1070 ; 1071 chars += n; 1072 sp = p - 1; 1073 } 1074 } 1075 1076 /* 1077 * touch :: update the modify time of a file. 1078 */ 1079 touch(name) 1080 char *name; /* name of file */ 1081 { 1082 register fd; 1083 char buf; 1084 1085 if ((fd = open(name, 2)) >= 0) { 1086 read(fd, &buf, 1); /* get first byte */ 1087 lseek(fd, 0L, 0); /* go to beginning */ 1088 write(fd, &buf, 1); /* and rewrite first byte */ 1089 close(fd); 1090 } 1091 } 1092 1093 1094 /* 1095 * clearbotl :: clear bottom line. 1096 * called when process quits or is killed. 1097 * it clears the bottom line of the terminal. 1098 */ 1099 clearbotl() 1100 { 1101 register int fd; 1102 int exit(); 1103 1104 signal(SIGALRM, exit); 1105 alarm(30); /* if can't open in 30 secs, just die */ 1106 if (!emacs && (fd = open(ourtty, 1)) >= 0) { 1107 write(fd, dis_status_line, strlen(dis_status_line)); 1108 close(fd); 1109 } 1110 #ifdef PROF 1111 if (chdir("/usr/src/ucb/sysline") < 0) 1112 (void) chdir("/tmp"); 1113 #endif 1114 exit(0); 1115 } 1116 1117 #ifdef TERMINFO 1118 initterm() 1119 { 1120 static char standbuf[40]; 1121 1122 setupterm(0, 1, 0); 1123 if (!window && !has_status_line) { 1124 /* not an appropriate terminal */ 1125 if (!quiet) 1126 fprintf(stderr, "sysline: no status capability for %s\n", 1127 getenv("TERM")); 1128 exit(1); 1129 } 1130 if (window || status_line_esc_ok) { 1131 if (set_attributes) { 1132 /* reverse video mode */ 1133 strcpy(standbuf, 1134 tparm(set_attributes,0,0,1,0,0,0,0,0,0)); 1135 rev_out = standbuf; 1136 rev_end = exit_attribute_mode; 1137 } else if (enter_standout_mode && exit_standout_mode) { 1138 rev_out = enter_standout_mode; 1139 rev_end = exit_standout_mode; 1140 } else 1141 rev_out = rev_end = ""; 1142 } else 1143 rev_out = rev_end = ""; 1144 columns--; /* avoid cursor wraparound */ 1145 } 1146 1147 #else /* TERMCAP */ 1148 1149 initterm() 1150 { 1151 char *term, *cp; 1152 static char tbuf[1024]; 1153 char is2[40]; 1154 extern char *UP; 1155 1156 if ((term = getenv("TERM")) == NULL) { 1157 if (!quiet) 1158 fprintf(stderr, 1159 "sysline: No TERM variable in enviroment\n"); 1160 exit(1); 1161 } 1162 if (tgetent(tbuf, term) <= 0) { 1163 if (!quiet) 1164 fprintf(stderr, 1165 "sysline: Unknown terminal type: %s\n", term); 1166 exit(1); 1167 } 1168 if (!window && tgetflag("hs") <= 0) { 1169 if (!strncmp(term, "h19", 3)) { 1170 /* for upward compatability with h19sys */ 1171 strcpy(to_status_line, 1172 "\033j\033x5\033x1\033Y8%+ \033o"); 1173 strcpy(from_status_line, "\033k\033y5"); 1174 strcpy(dis_status_line, "\033y1"); 1175 strcpy(rev_out, "\033p"); 1176 strcpy(rev_end, "\033q"); 1177 arrows = "\033Fhh\033G"; 1178 columns = 80; 1179 UP = "\b"; 1180 return; 1181 } 1182 if (!quiet) 1183 fprintf(stderr, 1184 "sysline: No status capability for %s\n", term); 1185 exit(1); 1186 } 1187 cp = is2; 1188 if (tgetstr("i2", &cp) != NULL) { 1189 /* someday tset will do this */ 1190 tputs(is2, 1, erroutc); 1191 fflush(stdout); 1192 } 1193 1194 /* the "-1" below is to avoid cursor wraparound problems */ 1195 columns = tgetnum("co") - 1; 1196 if (window) { 1197 strcpy(to_status_line, "\r"); 1198 strcpy(from_status_line, ""); 1199 cp = dis_status_line; /* use the clear line sequence */ 1200 *cp++ = '\r'; 1201 tgetstr("ce", &cp); 1202 } else { 1203 cp = to_status_line; 1204 tgetstr("ts", &cp); 1205 cp = from_status_line; 1206 tgetstr("fs", &cp); 1207 cp = dis_status_line; 1208 tgetstr("ds", &cp); 1209 eslok = tgetflag("es"); 1210 } 1211 if (eslok || window) { 1212 cp = rev_out; 1213 tgetstr("so", &cp); 1214 cp = rev_end; 1215 tgetstr("se", &cp); 1216 cp = clr_eol; 1217 tgetstr("ce", &cp); 1218 } else 1219 reverse = 0; /* turn off reverse video */ 1220 UP = "\b"; 1221 if (!strncmp(term, "h19", 3)) 1222 arrows = "\033Fhh\033G"; /* "two tiny graphic arrows" */ 1223 else 1224 arrows = "->"; 1225 } 1226 #endif TERMINFO 1227 1228 #ifdef pdp11 1229 loadav(ap) 1230 double ap[]; 1231 { 1232 register int i; 1233 short s_avenrun[3]; 1234 1235 lseek(kmem, (long)nl[NL_AVEN].n_value, 0); 1236 read(kmem, s_avenrun, sizeof(s_avenrun)); 1237 for (i=0; i < (sizeof(s_avenrun)/sizeof(s_avenrun[0])); i++) 1238 ap[i] = s_avenrun[i] / 256.0; 1239 } 1240 #endif 1241 1242 #ifdef RWHO 1243 char * 1244 sysrup(hp) 1245 register struct remotehost *hp; 1246 { 1247 char filename[100]; 1248 struct whod wd; 1249 static char buffer[50]; 1250 time_t now; 1251 1252 /* 1253 * rh_file is initially 0. 1254 * This is ok since standard input is assumed to exist. 1255 */ 1256 if (hp->rh_file == 0) { 1257 /* 1258 * Try rwho hostname file, and if that fails try ucbhostname. 1259 */ 1260 (void) strcpy1(strcpy1(filename, RWHOLEADER), hp->rh_host); 1261 if ((hp->rh_file = open(filename, 0)) < 0) { 1262 (void) strcpy1(strcpy1(strcpy1(filename, RWHOLEADER), 1263 NETPREFIX), hp->rh_host); 1264 hp->rh_file = open(filename, 0); 1265 } 1266 } 1267 if (hp->rh_file < 0) 1268 return sprintf(buffer, "%s?", hp->rh_host); 1269 (void) lseek(hp->rh_file, (off_t)0, 0); 1270 if (read(hp->rh_file, (char *)&wd, sizeof wd) != sizeof wd) 1271 return sprintf(buffer, "%s ?", hp->rh_host); 1272 (void) time(&now); 1273 if (now - wd.wd_recvtime > DOWN_THRESHOLD) { 1274 long interval; 1275 long days, hours, minutes; 1276 1277 interval = now - wd.wd_recvtime; 1278 minutes = (interval + 59) / 60; /* round to minutes */ 1279 hours = minutes / 60; /* extract hours from minutes */ 1280 minutes %= 60; /* remove hours from minutes */ 1281 days = hours / 24; /* extract days from hours */ 1282 hours %= 24; /* remove days from hours */ 1283 if (days > 7 || days < 0) 1284 (void) sprintf(buffer, "%s down", hp->rh_host); 1285 else if (days > 0) 1286 (void) sprintf(buffer, "%s %d+%d:%02d", 1287 hp->rh_host, days, hours, minutes); 1288 else 1289 (void) sprintf(buffer, "%s %d:%02d", 1290 hp->rh_host, hours, minutes); 1291 } else 1292 (void) sprintf(buffer, "%s %.1f", 1293 hp->rh_host, wd.wd_loadav[0]/100.0); 1294 return buffer; 1295 } 1296 #endif RWHO 1297 1298 getwinsize() 1299 { 1300 #ifdef TIOCGWINSZ 1301 struct winsize winsize; 1302 1303 /* the "-1" below is to avoid cursor wraparound problems */ 1304 if (ioctl(2, TIOCGWINSZ, (char *)&winsize) >= 0 && winsize.ws_col != 0) 1305 columns = winsize.ws_col - 1; 1306 #endif 1307 } 1308 1309 #ifdef SIGWINCH 1310 sigwinch() 1311 { 1312 winchanged++; 1313 } 1314 #endif 1315 1316 char * 1317 strcpy1(p, q) 1318 register char *p, *q; 1319 { 1320 1321 while (*p++ = *q++) 1322 ; 1323 return p - 1; 1324 } 1325 1326 outc(c) 1327 char c; 1328 { 1329 if (dbug) 1330 printf("%s", unctrl(c)); 1331 else 1332 putchar(c); 1333 } 1334 1335 erroutc(c) 1336 char c; 1337 { 1338 if (dbug) 1339 fprintf(stderr, "%s", unctrl(c)); 1340 else 1341 putc(c, stderr); 1342 } 1343