1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 char copyright[] = 20 "@(#) Copyright (c) 1980 Regents of the University of California.\n\ 21 All rights reserved.\n"; 22 #endif /* not lint */ 23 24 #ifndef lint 25 static char sccsid[] = "@(#)sysline.c 5.13 (Berkeley) 05/11/89"; 26 #endif /* not lint */ 27 28 /* 29 * sysline - system status display on 25th line of terminal 30 * j.k.foderaro 31 * 32 * Prints a variety of information on the special status line of terminals 33 * that have a status display capability. Cursor motions, status commands, 34 * etc. are gleamed from /etc/termcap. 35 * By default, all information is printed, and flags are given on the command 36 * line to disable the printing of information. The information and 37 * disabling flags are: 38 * 39 * flag what 40 * ----- ---- 41 * time of day 42 * load average and change in load average in the last 5 mins 43 * number of user logged on 44 * -p # of processes the users owns which are runnable and the 45 * number which are suspended. Processes whose parent is 1 46 * are not counted. 47 * -l users who've logged on and off. 48 * -m summarize new mail which has arrived 49 * 50 * <other flags> 51 * -r use non reverse video 52 * -c turn off 25th line for 5 seconds before redisplaying. 53 * -b beep once one the half hour, twice on the hour 54 * +N refresh display every N seconds. 55 * -i print pid first thing 56 * -e do simple print designed for an emacs buffer line 57 * -w do the right things for a window 58 * -h print hostname between time and load average 59 * -D print day/date before time of day 60 * -d debug mode - print status line data in human readable format 61 * -q quiet mode - don't output diagnostic messages 62 * -s print Short (left-justified) line if escapes not allowed 63 * -j Print left Justified line regardless 64 */ 65 66 #define BSD4_2 /* for 4.2 BSD */ 67 #define WHO /* turn this on always */ 68 #define HOSTNAME /* 4.1a or greater, with hostname() */ 69 #define RWHO /* 4.1a or greater, with rwho */ 70 #define VMUNIX /* turn this on if you are running on vmunix */ 71 #define NEW_BOOTTIME /* 4.1c or greater */ 72 73 #define NETPREFIX "ucb" 74 #define DEFDELAY 60 /* update status once per minute */ 75 /* 76 * if MAXLOAD is defined, then if the load average exceeded MAXLOAD 77 * then the process table will not be scanned and the log in/out data 78 * will not be checked. The purpose of this is to reduced the load 79 * on the system when it is loaded. 80 */ 81 #define MAXLOAD 6.0 82 83 #include <stdio.h> 84 #include <sys/param.h> 85 #include <sys/signal.h> 86 #include <utmp.h> 87 #include <ctype.h> 88 #ifndef BSD4_2 89 #include <unctrl.h> 90 #endif 91 #include <sys/time.h> 92 #include <sys/stat.h> 93 #ifdef VMUNIX 94 #include <nlist.h> 95 #include <sys/vtimes.h> 96 #include <sys/proc.h> 97 #endif 98 #ifdef pdp11 99 #include <a.out.h> 100 #include <sys/proc.h> 101 #endif 102 #include <curses.h> 103 #undef nl 104 #ifdef TERMINFO 105 #include <term.h> 106 #endif TERMINFO 107 108 #ifdef RWHO 109 #include <protocols/rwhod.h> 110 111 #define DOWN_THRESHOLD (11 * 60) 112 113 struct remotehost { 114 char *rh_host; 115 int rh_file; 116 } remotehost[10]; 117 int nremotes = 0; 118 #endif RWHO 119 120 #include "pathnames.h" 121 122 struct nlist nl[] = { 123 #ifdef NEW_BOOTTIME 124 { "_boottime" }, /* After 4.1a the label changed to "boottime" */ 125 #else 126 { "_bootime" }, /* Under 4.1a and earlier it is "bootime" */ 127 #endif 128 #define NL_BOOT 0 129 { "_proc" }, 130 #define NL_PROC 1 131 { "_avenrun" }, 132 #define NL_AVEN 2 133 #ifdef VMUNIX 134 { "_nproc" }, 135 #define NL_NPROC 3 136 #endif 137 0 138 }; 139 140 /* stuff for the kernel */ 141 int kmem; /* file descriptor for _PATH_KMEM */ 142 struct proc *proc, *procNPROC; 143 int nproc; 144 int procadr; 145 double avenrun[3]; /* used for storing load averages */ 146 147 /* 148 * In order to determine how many people are logged on and who has 149 * logged in or out, we read in the /etc/utmp file. We also keep track of 150 * the previous utmp file. 151 */ 152 int ut = -1; /* the file descriptor */ 153 struct utmp *new, *old; 154 char *status; /* per tty status bits, see below */ 155 int nentries; /* number of utmp entries */ 156 /* string lengths for printing */ 157 #define LINESIZE (sizeof old->ut_line) 158 #define NAMESIZE (sizeof old->ut_name) 159 /* 160 * Status codes to say what has happened to a particular entry in utmp. 161 * NOCH means no change, ON means new person logged on, 162 * OFF means person logged off. 163 */ 164 #define NOCH 0 165 #define ON 0x1 166 #define OFF 0x2 167 168 #ifdef WHO 169 char whofilename[100]; 170 char whofilename2[100]; 171 #endif 172 173 #ifdef HOSTNAME 174 char hostname[MAXHOSTNAMELEN+1]; /* one more for null termination */ 175 #endif 176 177 char lockfilename[100]; /* if exists, will prevent us from running */ 178 179 /* flags which determine which info is printed */ 180 int mailcheck = 1; /* m - do biff like checking of mail */ 181 int proccheck = 1; /* p - give information on processes */ 182 int logcheck = 1; /* l - tell who logs in and out */ 183 int hostprint = 0; /* h - print out hostname */ 184 int dateprint = 0; /* h - print out day/date */ 185 int quiet = 0; /* q - hush diagnostic messages */ 186 187 /* flags which determine how things are printed */ 188 int clr_bet_ref = 0; /* c - clear line between refeshes */ 189 int reverse = 1; /* r - use reverse video */ 190 int shortline = 0; /* s - short (left-justified) if escapes not allowed */ 191 int leftline = 0; /* j - left-justified even if escapes allowed */ 192 193 /* flags which have terminal do random things */ 194 int beep = 0; /* b - beep every half hour and twice every hour */ 195 int printid = 0; /* i - print pid of this process at startup */ 196 int synch = 1; /* synchronize with clock */ 197 198 /* select output device (status display or straight output) */ 199 int emacs = 0; /* e - assume status display */ 200 int window = 0; /* w - window mode */ 201 int dbug = 0; /* d - debug */ 202 203 /* 204 * used to turn off reverse video every REVOFF times 205 * in an attempt to not wear out the phospher. 206 */ 207 #define REVOFF 5 208 int revtime = 1; 209 210 /* used by mail checker */ 211 off_t mailsize = 0; 212 off_t linebeg = 0; /* place where we last left off reading */ 213 214 /* things used by the string routines */ 215 int chars; /* number of printable characters */ 216 char *sp; 217 char strarr[512]; /* big enough now? */ 218 /* flags to stringdump() */ 219 char sawmail; /* remember mail was seen to print bells */ 220 char mustclear; /* status line messed up */ 221 222 /* strings which control status line display */ 223 #ifdef TERMINFO 224 char *rev_out, *rev_end, *arrows; 225 char *tparm(); 226 #else 227 char to_status_line[64]; 228 char from_status_line[64]; 229 char dis_status_line[64]; 230 char clr_eol[64]; 231 char rev_out[20], rev_end[20]; 232 char *arrows, *bell = "\007"; 233 int eslok; /* escapes on status line okay (reverse, cursor addressing) */ 234 int hasws = 0; /* is "ws" explicitly defined? */ 235 int columns; 236 #define tparm(cap, parm) tgoto((cap), 0, (parm)) 237 char *tgoto(); 238 #endif 239 240 /* to deal with window size changes */ 241 #ifdef SIGWINCH 242 int sigwinch(); 243 char winchanged; /* window size has changed since last update */ 244 #endif 245 246 /* random globals */ 247 char *username; 248 char *ourtty; /* keep track of what tty we're on */ 249 struct stat stbuf, mstbuf; /* mstbuf for mail check only */ 250 unsigned delay = DEFDELAY; 251 uid_t uid; 252 double loadavg = 0.0; /* current load average */ 253 int users = 0; 254 255 char *getenv(); 256 char *ttyname(); 257 char *strcpy1(); 258 char *sysrup(); 259 char *calloc(); 260 char *malloc(); 261 int outc(); 262 int erroutc(); 263 264 main(argc,argv) 265 register char **argv; 266 { 267 int clearbotl(); 268 register char *cp; 269 char *home; 270 extern char *index(); 271 272 #ifdef HOSTNAME 273 gethostname(hostname, sizeof hostname - 1); 274 if ((cp = index(hostname, '.')) != NULL) 275 *cp = '\0'; 276 #endif 277 278 for (argv++; *argv != 0; argv++) 279 switch (**argv) { 280 case '-': 281 for (cp = *argv + 1; *cp; cp++) { 282 switch(*cp) { 283 case 'r' : /* turn off reverse video */ 284 reverse = 0; 285 break; 286 case 'c': 287 clr_bet_ref = 1; 288 break; 289 case 'h': 290 hostprint = 1; 291 break; 292 case 'D': 293 dateprint = 1; 294 break; 295 #ifdef RWHO 296 case 'H': 297 if (argv[1] == 0) 298 break; 299 argv++; 300 if (strcmp(hostname, *argv) && 301 strcmp(&hostname[sizeof NETPREFIX - 1], *argv)) 302 remotehost[nremotes++].rh_host = *argv; 303 break; 304 #endif RWHO 305 case 'm': 306 mailcheck = 0; 307 break; 308 case 'p': 309 proccheck = 0; 310 break; 311 case 'l': 312 logcheck = 0; 313 break; 314 case 'b': 315 beep = 1; 316 break; 317 case 'i': 318 printid = 1; 319 break; 320 case 'w': 321 window = 1; 322 break; 323 case 'e': 324 emacs = 1; 325 break; 326 case 'd': 327 dbug = 1; 328 break; 329 case 'q': 330 quiet = 1; 331 break; 332 case 's': 333 shortline = 1; 334 break; 335 case 'j': 336 leftline = 1; 337 break; 338 default: 339 fprintf(stderr, 340 "sysline: bad flag: %c\n", *cp); 341 } 342 } 343 break; 344 case '+': 345 delay = atoi(*argv + 1); 346 if (delay < 10) 347 delay = 10; 348 else if (delay > 500) 349 delay = 500; 350 synch = 0; /* no more sync */ 351 break; 352 default: 353 fprintf(stderr, "sysline: illegal argument %s\n", 354 argv[0]); 355 } 356 if (emacs) { 357 reverse = 0; 358 columns = 79; 359 } else /* if not to emacs window, initialize terminal dependent info */ 360 initterm(); 361 #ifdef SIGWINCH 362 /* 363 * When the window size changes and we are the foreground 364 * process (true if -w), we get this signal. 365 */ 366 signal(SIGWINCH, sigwinch); 367 #endif 368 getwinsize(); /* get window size from ioctl */ 369 370 /* immediately fork and let the parent die if not emacs mode */ 371 if (!emacs && !window && !dbug) { 372 if (fork()) 373 exit(0); 374 /* pgrp should take care of things, but ignore them anyway */ 375 signal(SIGINT, SIG_IGN); 376 signal(SIGQUIT, SIG_IGN); 377 #ifdef VMUNIX 378 signal(SIGTTOU, SIG_IGN); 379 #endif 380 } 381 /* 382 * When we logoff, init will do a "vhangup()" on this 383 * tty which turns off I/O access and sends a SIGHUP 384 * signal. We catch this and thereby clear the status 385 * display. Note that a bug in 4.1bsd caused the SIGHUP 386 * signal to be sent to the wrong process, so you had to 387 * `kill -HUP' yourself in your .logout file. 388 * Do the same thing for SIGTERM, which is the default kill 389 * signal. 390 */ 391 signal(SIGHUP, clearbotl); 392 signal(SIGTERM, clearbotl); 393 /* 394 * This is so kill -ALRM to force update won't screw us up.. 395 */ 396 signal(SIGALRM, SIG_IGN); 397 398 uid = getuid(); 399 ourtty = ttyname(2); /* remember what tty we are on */ 400 if (printid) { 401 printf("%d\n", getpid()); 402 fflush(stdout); 403 } 404 dup2(2, 1); 405 406 if ((home = getenv("HOME")) == 0) 407 home = ""; 408 strcpy1(strcpy1(whofilename, home), "/.who"); 409 strcpy1(strcpy1(whofilename2, home), "/.sysline"); 410 strcpy1(strcpy1(lockfilename, home), "/.syslinelock"); 411 412 if ((kmem = open(_PATH_KMEM,0)) < 0) { 413 fprintf(stderr, "Can't open %s\n", _PATH_KMEM); 414 exit(1); 415 } 416 readnamelist(); 417 if (proccheck) 418 initprocread(); 419 if (mailcheck) 420 if ((username = getenv("USER")) == 0) 421 mailcheck = 0; 422 else { 423 chdir(_PATH_MBOX); 424 if (stat(username, &mstbuf) >= 0) 425 mailsize = mstbuf.st_size; 426 else 427 mailsize = 0; 428 } 429 430 while (emacs || window || isloggedin()) 431 if (access(lockfilename, 0) >= 0) 432 sleep(60); 433 else { 434 prtinfo(); 435 sleep(delay); 436 if (clr_bet_ref) { 437 tputs(dis_status_line, 1, outc); 438 fflush(stdout); 439 sleep(5); 440 } 441 revtime = (1 + revtime) % REVOFF; 442 } 443 clearbotl(); 444 /*NOTREACHED*/ 445 } 446 447 isloggedin() 448 { 449 /* 450 * you can tell if a person has logged out if the owner of 451 * the tty has changed 452 */ 453 struct stat statbuf; 454 455 return fstat(2, &statbuf) == 0 && statbuf.st_uid == uid; 456 } 457 458 readnamelist() 459 { 460 time_t bootime, clock, nintv, time(); 461 462 nlist(_PATH_UNIX, nl); 463 if (nl[0].n_value == 0) { 464 if (!quiet) 465 fprintf(stderr, "No namelist\n"); 466 return; 467 } 468 lseek(kmem, (long)nl[NL_BOOT].n_value, 0); 469 read(kmem, &bootime, sizeof(bootime)); 470 (void) time(&clock); 471 nintv = clock - bootime; 472 if (nintv <= 0L || nintv > 60L*60L*24L*365L) { 473 if (!quiet) 474 fprintf(stderr, 475 "Time makes no sense... namelist must be wrong\n"); 476 nl[NL_PROC].n_value = nl[NL_AVEN].n_value = 0; 477 } 478 } 479 480 readutmp(nflag) 481 char nflag; 482 { 483 static time_t lastmod; /* initially zero */ 484 static off_t utmpsize; /* ditto */ 485 struct stat st; 486 487 if (ut < 0 && (ut = open(_PATH_UTMP, 0)) < 0) { 488 fprintf(stderr, "sysline: Can't open %s.\n", _PATH_UTMP); 489 exit(1); 490 } 491 if (fstat(ut, &st) < 0 || st.st_mtime == lastmod) 492 return 0; 493 lastmod = st.st_mtime; 494 if (utmpsize != st.st_size) { 495 utmpsize = st.st_size; 496 nentries = utmpsize / sizeof (struct utmp); 497 if (old == 0) { 498 old = (struct utmp *)calloc(utmpsize, 1); 499 new = (struct utmp *)calloc(utmpsize, 1); 500 } else { 501 old = (struct utmp *)realloc((char *)old, utmpsize); 502 new = (struct utmp *)realloc((char *)new, utmpsize); 503 free(status); 504 } 505 status = malloc(nentries * sizeof *status); 506 if (old == 0 || new == 0 || status == 0) { 507 fprintf(stderr, "sysline: Out of memory.\n"); 508 exit(1); 509 } 510 } 511 lseek(ut, 0L, 0); 512 (void) read(ut, (char *) (nflag ? new : old), utmpsize); 513 return 1; 514 } 515 516 /* 517 * read in the process table locations and sizes, and allocate space 518 * for storing the process table. This is done only once. 519 */ 520 initprocread() 521 { 522 523 if (nl[NL_PROC].n_value == 0) 524 return; 525 #ifdef VMUNIX 526 lseek(kmem, (long)nl[NL_PROC].n_value, 0); 527 read(kmem, &procadr, sizeof procadr); 528 lseek(kmem, (long)nl[NL_NPROC].n_value, 0); 529 read(kmem, &nproc, sizeof nproc); 530 #endif 531 #ifdef pdp11 532 procadr = nl[NL_PROC].n_value; 533 nproc = NPROC; /* from param.h */ 534 #endif 535 if ((proc = (struct proc *) calloc(nproc, sizeof (struct proc))) == 0) { 536 fprintf(stderr, "Out of memory.\n"); 537 exit(1); 538 } 539 procNPROC = proc + nproc; 540 } 541 542 /* 543 * read in the process table. This assumes that initprocread has alread been 544 * called to set up storage. 545 */ 546 readproctab() 547 { 548 549 if (nl[NL_PROC].n_value == 0) 550 return (0); 551 lseek(kmem, (long)procadr, 0); 552 read(kmem, (char *)proc, nproc * sizeof (struct proc)); 553 return (1); 554 } 555 556 prtinfo() 557 { 558 int on, off; 559 register i; 560 char fullprocess; 561 562 stringinit(); 563 #ifdef SIGWINCH 564 if (winchanged) { 565 winchanged = 0; 566 getwinsize(); 567 mustclear = 1; 568 } 569 #endif 570 #ifdef WHO 571 /* check for file named .who in the home directory */ 572 whocheck(); 573 #endif 574 timeprint(); 575 /* 576 * if mail is seen, don't print rest of info, just the mail 577 * reverse new and old so that next time we run, we won't lose log 578 * in and out information 579 */ 580 if (mailcheck && (sawmail = mailseen())) 581 goto bottom; 582 #ifdef HOSTNAME 583 #ifdef RWHO 584 for (i = 0; i < nremotes; i++) { 585 char *tmp; 586 587 stringspace(); 588 tmp = sysrup(remotehost + i); 589 stringcat(tmp, strlen(tmp)); 590 } 591 #endif 592 /* 593 * print hostname info if requested 594 */ 595 if (hostprint) { 596 stringspace(); 597 stringcat(hostname, -1); 598 } 599 #endif 600 /* 601 * print load average and difference between current load average 602 * and the load average 5 minutes ago 603 */ 604 if (nl[NL_AVEN].n_value != 0) { 605 double diff; 606 607 stringspace(); 608 #ifdef VMUNIX 609 lseek(kmem, (long)nl[NL_AVEN].n_value, 0); 610 read(kmem, avenrun, sizeof avenrun); 611 #endif 612 #ifdef pdp11 613 loadav(avenrun); 614 #endif 615 if ((diff = avenrun[0] - avenrun[1]) < 0.0) 616 stringprt("%.1f %.1f", avenrun[0], diff); 617 else 618 stringprt("%.1f +%.1f", avenrun[0], diff); 619 loadavg = avenrun[0]; /* remember load average */ 620 } 621 /* 622 * print log on and off information 623 */ 624 stringspace(); 625 fullprocess = 1; 626 #ifdef MAXLOAD 627 if (loadavg > MAXLOAD) 628 fullprocess = 0; /* too loaded to run */ 629 #endif 630 /* 631 * Read utmp file (logged in data) only if we are doing a full 632 * process, or if this is the first time and we are calculating 633 * the number of users. 634 */ 635 on = off = 0; 636 if (users == 0) { /* first time */ 637 if (readutmp(0)) 638 for (i = 0; i < nentries; i++) 639 if (old[i].ut_name[0]) 640 users++; 641 } else if (fullprocess && readutmp(1)) { 642 struct utmp *tmp; 643 644 users = 0; 645 for (i = 0; i < nentries; i++) { 646 if (strncmp(old[i].ut_name, 647 new[i].ut_name, NAMESIZE) == 0) 648 status[i] = NOCH; 649 else if (old[i].ut_name[0] == '\0') { 650 status[i] = ON; 651 on++; 652 } else if (new[i].ut_name[0] == '\0') { 653 status[i] = OFF; 654 off++; 655 } else { 656 status[i] = ON | OFF; 657 on++; 658 off++; 659 } 660 if (new[i].ut_name[0]) 661 users++; 662 } 663 tmp = new; 664 new = old; 665 old = tmp; 666 } 667 /* 668 * Print: 669 * 1. number of users 670 * 2. a * for unread mail 671 * 3. a - if load is too high 672 * 4. number of processes running and stopped 673 */ 674 stringprt("%du", users); 675 if (mailsize > 0 && mstbuf.st_mtime >= mstbuf.st_atime) 676 stringcat("*", -1); 677 if (!fullprocess && (proccheck || logcheck)) 678 stringcat("-", -1); 679 if (fullprocess && proccheck && readproctab()) { 680 register struct proc *p; 681 int procrun, procstop; 682 683 /* 684 * We are only interested in processes which have the same 685 * uid as us, and whose parent process id is not 1. 686 */ 687 procrun = procstop = 0; 688 for (p = proc; p < procNPROC; p++) { 689 if (p->p_stat == 0 || p->p_pgrp == 0 || 690 p->p_uid != uid || p->p_ppid == 1) 691 continue; 692 switch (p->p_stat) { 693 case SSTOP: 694 procstop++; 695 break; 696 case SSLEEP: 697 /* 698 * Sleep can mean waiting for a signal or just 699 * in a disk or page wait queue ready to run. 700 * We can tell if it is the later by the pri 701 * being negative. 702 */ 703 if (p->p_pri < PZERO) 704 procrun++; 705 break; 706 case SWAIT: 707 case SRUN: 708 case SIDL: 709 procrun++; 710 } 711 } 712 if (procrun > 0 || procstop > 0) { 713 stringspace(); 714 if (procrun > 0 && procstop > 0) 715 stringprt("%dr %ds", procrun, procstop); 716 else if (procrun > 0) 717 stringprt("%dr", procrun); 718 else 719 stringprt("%ds", procstop); 720 } 721 } 722 /* 723 * If anyone has logged on or off, and we are interested in it, 724 * print it out. 725 */ 726 if (logcheck) { 727 /* old and new have already been swapped */ 728 if (on) { 729 stringspace(); 730 stringcat("on:", -1); 731 for (i = 0; i < nentries; i++) 732 if (status[i] & ON) { 733 stringprt(" %.8s", old[i].ut_name); 734 ttyprint(old[i].ut_line); 735 } 736 } 737 if (off) { 738 stringspace(); 739 stringcat("off:", -1); 740 for (i = 0; i < nentries; i++) 741 if (status[i] & OFF) { 742 stringprt(" %.8s", new[i].ut_name); 743 ttyprint(new[i].ut_line); 744 } 745 } 746 } 747 bottom: 748 /* dump out what we know */ 749 stringdump(); 750 } 751 752 timeprint() 753 { 754 long curtime; 755 struct tm *tp, *localtime(); 756 static int beepable = 1; 757 758 /* always print time */ 759 time(&curtime); 760 tp = localtime(&curtime); 761 if (dateprint) 762 stringprt("%.11s", ctime(&curtime)); 763 stringprt("%d:%02d", tp->tm_hour > 12 ? tp->tm_hour - 12 : 764 (tp->tm_hour == 0 ? 12 : tp->tm_hour), tp->tm_min); 765 if (synch) /* sync with clock */ 766 delay = 60 - tp->tm_sec; 767 /* 768 * Beepable is used to insure that we get at most one set of beeps 769 * every half hour. 770 */ 771 if (beep) 772 if (beepable) { 773 if (tp->tm_min == 30) { 774 tputs(bell, 1, outc); 775 fflush(stdout); 776 beepable = 0; 777 } else if (tp->tm_min == 0) { 778 tputs(bell, 1, outc); 779 fflush(stdout); 780 sleep(2); 781 tputs(bell, 1, outc); 782 fflush(stdout); 783 beepable = 0; 784 } 785 } else 786 if (tp->tm_min != 0 && tp->tm_min != 30) 787 beepable = 1; 788 } 789 790 /* 791 * whocheck -- check for file named .who and print it on the who line first 792 */ 793 whocheck() 794 { 795 int chss; 796 register char *p; 797 char buff[81]; 798 int whofile; 799 800 if ((whofile = open(whofilename, 0)) < 0 && 801 (whofile = open(whofilename2, 0)) < 0) 802 return; 803 chss = read(whofile, buff, sizeof buff - 1); 804 close(whofile); 805 if (chss <= 0) 806 return; 807 buff[chss] = '\0'; 808 /* 809 * Remove all line feeds, and replace by spaces if they are within 810 * the message, else replace them by nulls. 811 */ 812 for (p = buff; *p;) 813 if (*p == '\n') 814 if (p[1]) 815 *p++ = ' '; 816 else 817 *p = '\0'; 818 else 819 p++; 820 stringcat(buff, p - buff); 821 stringspace(); 822 } 823 824 /* 825 * ttyprint -- given the name of a tty, print in the string buffer its 826 * short name surrounded by parenthesis. 827 * ttyxx is printed as (xx) 828 * console is printed as (cty) 829 */ 830 ttyprint(name) 831 char *name; 832 { 833 char buff[11]; 834 835 if (strncmp(name, "tty", 3) == 0) 836 stringprt("(%.*s)", LINESIZE - 3, name + 3); 837 else if (strcmp(name, "console") == 0) 838 stringcat("(cty)", -1); 839 else 840 stringprt("(%.*s)", LINESIZE, name); 841 } 842 843 /* 844 * mail checking function 845 * returns 0 if no mail seen 846 */ 847 mailseen() 848 { 849 FILE *mfd; 850 register n; 851 register char *cp; 852 char lbuf[100], sendbuf[100], *bufend; 853 char seenspace; 854 int retval = 0; 855 856 if (stat(username, &mstbuf) < 0) { 857 mailsize = 0; 858 return 0; 859 } 860 if (mstbuf.st_size <= mailsize || (mfd = fopen(username,"r")) == NULL) { 861 mailsize = mstbuf.st_size; 862 return 0; 863 } 864 fseek(mfd, mailsize, 0); 865 while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0 && 866 strncmp(lbuf, "From ", 5) != 0) 867 ; 868 if (n < 0) { 869 stringcat("Mail has just arrived", -1); 870 goto out; 871 } 872 retval = 1; 873 /* 874 * Found a From line, get second word, which is the sender, 875 * and print it. 876 */ 877 for (cp = lbuf + 5; *cp && *cp != ' '; cp++) /* skip to blank */ 878 ; 879 *cp = '\0'; /* terminate name */ 880 stringspace(); 881 stringprt("Mail from %s ", lbuf + 5); 882 /* 883 * Print subject, and skip over header. 884 */ 885 while ((n = readline(mfd, lbuf, sizeof lbuf)) > 0) 886 if (strncmp(lbuf, "Subject:", 8) == 0) 887 stringprt("on %s ", lbuf + 9); 888 if (!emacs) 889 stringcat(arrows, 2); 890 else 891 stringcat(": ", 2); 892 if (n < 0) /* already at eof */ 893 goto out; 894 /* 895 * Print as much of the letter as we can. 896 */ 897 cp = sendbuf; 898 if ((n = columns - chars) > sizeof sendbuf - 1) 899 n = sizeof sendbuf - 1; 900 bufend = cp + n; 901 seenspace = 0; 902 while ((n = readline(mfd, lbuf, sizeof lbuf)) >= 0) { 903 register char *rp; 904 905 if (strncmp(lbuf, "From ", 5) == 0) 906 break; 907 if (cp >= bufend) 908 continue; 909 if (!seenspace) { 910 *cp++ = ' '; /* space before lines */ 911 seenspace = 1; 912 } 913 rp = lbuf; 914 while (*rp && cp < bufend) 915 if (isspace(*rp)) { 916 if (!seenspace) { 917 *cp++ = ' '; 918 seenspace = 1; 919 } 920 rp++; 921 } else { 922 *cp++ = *rp++; 923 seenspace = 0; 924 } 925 } 926 *cp = 0; 927 stringcat(sendbuf, -1); 928 /* 929 * Want to update write time so a star will 930 * appear after the number of users until the 931 * user reads his mail. 932 */ 933 out: 934 mailsize = linebeg; 935 fclose(mfd); 936 touch(username); 937 return retval; 938 } 939 940 /* 941 * readline -- read a line from fp and store it in buf. 942 * return the number of characters read. 943 */ 944 readline(fp, buf, n) 945 register FILE *fp; 946 char *buf; 947 register n; 948 { 949 register c; 950 register char *cp = buf; 951 952 linebeg = ftell(fp); /* remember loc where line begins */ 953 cp = buf; 954 while (--n > 0 && (c = getc(fp)) != EOF && c != '\n') 955 *cp++ = c; 956 *cp = 0; 957 if (c == EOF && cp - buf == 0) 958 return -1; 959 return cp - buf; 960 } 961 962 963 /* 964 * string hacking functions 965 */ 966 967 stringinit() 968 { 969 sp = strarr; 970 chars = 0; 971 } 972 973 /*VARARGS1*/ 974 stringprt(format, a, b, c) 975 char *format; 976 { 977 char tempbuf[150]; 978 979 (void)sprintf(tempbuf, format, a, b, c); 980 stringcat(tempbuf, -1); 981 } 982 983 stringdump() 984 { 985 char bigbuf[sizeof strarr + 200]; 986 register char *bp = bigbuf; 987 register int i; 988 989 if (!emacs) { 990 if (sawmail) 991 bp = strcpy1(bp, bell); 992 if (eslok) 993 bp = strcpy1(bp, tparm(to_status_line, 994 leftline ? 0 : columns - chars)); 995 else { 996 bp = strcpy1(bp, to_status_line); 997 if (!shortline && !leftline) 998 for (i = columns - chars; --i >= 0;) 999 *bp++ = ' '; 1000 } 1001 if (reverse && revtime != 0) 1002 bp = strcpy1(bp, rev_out); 1003 } 1004 *sp = 0; 1005 bp = strcpy1(bp, strarr); 1006 if (!emacs) { 1007 if (reverse) 1008 bp = strcpy1(bp, rev_end); 1009 bp = strcpy1(bp, from_status_line); 1010 if (sawmail) 1011 bp = strcpy1(strcpy1(bp, bell), bell); 1012 *bp = 0; 1013 tputs(bigbuf, 1, outc); 1014 if (mustclear) { 1015 mustclear = 0; 1016 tputs(clr_eol, 1, outc); 1017 } 1018 if (dbug) 1019 putchar('\n'); 1020 fflush(stdout); 1021 } else 1022 write(2, bigbuf, bp - bigbuf); 1023 } 1024 1025 stringspace() 1026 { 1027 if (reverse && revtime != 0) { 1028 #ifdef TERMINFO 1029 stringcat(rev_end, 1030 magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch); 1031 stringcat(" ", 1); 1032 stringcat(rev_out, 1033 magic_cookie_glitch <= 0 ? 0 : magic_cookie_glitch); 1034 #else 1035 stringcat(rev_end, 0); 1036 stringcat(" ", 1); 1037 stringcat(rev_out, 0); 1038 #endif TERMINFO 1039 } else 1040 stringcat(" ", 1); 1041 } 1042 1043 /* 1044 * stringcat :: concatenate the characters in string str to the list we are 1045 * building to send out. 1046 * str - the string to print. may contain funny (terminal control) chars. 1047 * n - the number of printable characters in the string 1048 * or if -1 then str is all printable so we can truncate it, 1049 * otherwise don't print only half a string. 1050 */ 1051 stringcat(str, n) 1052 register char *str; 1053 register n; 1054 { 1055 register char *p = sp; 1056 1057 if (n < 0) { /* truncate */ 1058 n = columns - chars; 1059 while ((*p++ = *str++) && --n >= 0) 1060 ; 1061 p--; 1062 chars += p - sp; 1063 sp = p; 1064 } else if (chars + n <= columns) { /* don't truncate */ 1065 while (*p++ = *str++) 1066 ; 1067 chars += n; 1068 sp = p - 1; 1069 } 1070 } 1071 1072 /* 1073 * touch :: update the modify time of a file. 1074 */ 1075 touch(name) 1076 char *name; /* name of file */ 1077 { 1078 register fd; 1079 char buf; 1080 1081 if ((fd = open(name, 2)) >= 0) { 1082 read(fd, &buf, 1); /* get first byte */ 1083 lseek(fd, 0L, 0); /* go to beginning */ 1084 write(fd, &buf, 1); /* and rewrite first byte */ 1085 close(fd); 1086 } 1087 } 1088 1089 1090 /* 1091 * clearbotl :: clear bottom line. 1092 * called when process quits or is killed. 1093 * it clears the bottom line of the terminal. 1094 */ 1095 clearbotl() 1096 { 1097 register int fd; 1098 int exit(); 1099 1100 signal(SIGALRM, exit); 1101 alarm(30); /* if can't open in 30 secs, just die */ 1102 if (!emacs && (fd = open(ourtty, 1)) >= 0) { 1103 write(fd, dis_status_line, strlen(dis_status_line)); 1104 close(fd); 1105 } 1106 #ifdef PROF 1107 if (chdir(_PATH_SYSLINE) < 0) 1108 (void) chdir(_PATH_TMP); 1109 #endif 1110 exit(0); 1111 } 1112 1113 #ifdef TERMINFO 1114 initterm() 1115 { 1116 static char standbuf[40]; 1117 1118 setupterm(0, 1, 0); 1119 if (!window && !has_status_line) { 1120 /* not an appropriate terminal */ 1121 if (!quiet) 1122 fprintf(stderr, "sysline: no status capability for %s\n", 1123 getenv("TERM")); 1124 exit(1); 1125 } 1126 if (window || status_line_esc_ok) { 1127 if (set_attributes) { 1128 /* reverse video mode */ 1129 strcpy(standbuf, 1130 tparm(set_attributes,0,0,1,0,0,0,0,0,0)); 1131 rev_out = standbuf; 1132 rev_end = exit_attribute_mode; 1133 } else if (enter_standout_mode && exit_standout_mode) { 1134 rev_out = enter_standout_mode; 1135 rev_end = exit_standout_mode; 1136 } else 1137 rev_out = rev_end = ""; 1138 } else 1139 rev_out = rev_end = ""; 1140 columns--; /* avoid cursor wraparound */ 1141 } 1142 1143 #else /* TERMCAP */ 1144 1145 initterm() 1146 { 1147 char *term, *cp; 1148 static char tbuf[1024]; 1149 char is2[40]; 1150 extern char *UP; 1151 1152 if ((term = getenv("TERM")) == NULL) { 1153 if (!quiet) 1154 fprintf(stderr, 1155 "sysline: No TERM variable in enviroment\n"); 1156 exit(1); 1157 } 1158 if (tgetent(tbuf, term) <= 0) { 1159 if (!quiet) 1160 fprintf(stderr, 1161 "sysline: Unknown terminal type: %s\n", term); 1162 exit(1); 1163 } 1164 if (!window && tgetflag("hs") <= 0) { 1165 if (!strncmp(term, "h19", 3)) { 1166 /* for upward compatability with h19sys */ 1167 strcpy(to_status_line, 1168 "\033j\033x5\033x1\033Y8%+ \033o"); 1169 strcpy(from_status_line, "\033k\033y5"); 1170 strcpy(dis_status_line, "\033y1"); 1171 strcpy(rev_out, "\033p"); 1172 strcpy(rev_end, "\033q"); 1173 arrows = "\033Fhh\033G"; 1174 columns = 80; 1175 UP = "\b"; 1176 return; 1177 } 1178 if (!quiet) 1179 fprintf(stderr, 1180 "sysline: No status capability for %s\n", term); 1181 exit(1); 1182 } 1183 cp = is2; 1184 if (tgetstr("i2", &cp) != NULL) { 1185 /* someday tset will do this */ 1186 tputs(is2, 1, erroutc); 1187 fflush(stdout); 1188 } 1189 1190 /* the "-1" below is to avoid cursor wraparound problems */ 1191 columns = tgetnum("ws"); 1192 hasws = columns >= 0; 1193 if (!hasws) 1194 columns = tgetnum("co"); 1195 columns -= 1; 1196 if (window) { 1197 strcpy(to_status_line, "\r"); 1198 cp = dis_status_line; /* use the clear line sequence */ 1199 *cp++ = '\r'; 1200 tgetstr("ce", &cp); 1201 if (leftline) 1202 strcpy(from_status_line, dis_status_line + 1); 1203 else 1204 strcpy(from_status_line, ""); 1205 } else { 1206 cp = to_status_line; 1207 tgetstr("ts", &cp); 1208 cp = from_status_line; 1209 tgetstr("fs", &cp); 1210 cp = dis_status_line; 1211 tgetstr("ds", &cp); 1212 eslok = tgetflag("es"); 1213 } 1214 if (eslok || window) { 1215 cp = rev_out; 1216 tgetstr("so", &cp); 1217 cp = rev_end; 1218 tgetstr("se", &cp); 1219 cp = clr_eol; 1220 tgetstr("ce", &cp); 1221 } else 1222 reverse = 0; /* turn off reverse video */ 1223 UP = "\b"; 1224 if (!strncmp(term, "h19", 3)) 1225 arrows = "\033Fhh\033G"; /* "two tiny graphic arrows" */ 1226 else 1227 arrows = "->"; 1228 } 1229 #endif TERMINFO 1230 1231 #ifdef pdp11 1232 loadav(ap) 1233 double ap[]; 1234 { 1235 register int i; 1236 short s_avenrun[3]; 1237 1238 lseek(kmem, (long)nl[NL_AVEN].n_value, 0); 1239 read(kmem, s_avenrun, sizeof(s_avenrun)); 1240 for (i=0; i < (sizeof(s_avenrun)/sizeof(s_avenrun[0])); i++) 1241 ap[i] = s_avenrun[i] / 256.0; 1242 } 1243 #endif 1244 1245 #ifdef RWHO 1246 char * 1247 sysrup(hp) 1248 register struct remotehost *hp; 1249 { 1250 char filename[100]; 1251 struct whod wd; 1252 #define WHOD_HDR_SIZE (sizeof (wd) - sizeof (wd.wd_we)) 1253 static char buffer[50]; 1254 time_t now; 1255 1256 /* 1257 * rh_file is initially 0. 1258 * This is ok since standard input is assumed to exist. 1259 */ 1260 if (hp->rh_file == 0) { 1261 /* 1262 * Try rwho hostname file, and if that fails try ucbhostname. 1263 */ 1264 (void) strcpy1(strcpy1(filename, _PATH_RWHO), hp->rh_host); 1265 if ((hp->rh_file = open(filename, 0)) < 0) { 1266 (void) strcpy1(strcpy1(strcpy1(filename, _PATH_RWHO), 1267 NETPREFIX), hp->rh_host); 1268 hp->rh_file = open(filename, 0); 1269 } 1270 } 1271 if (hp->rh_file < 0) { 1272 (void) sprintf(buffer, "%s?", hp->rh_host); 1273 return(buffer); 1274 } 1275 (void) lseek(hp->rh_file, (off_t)0, 0); 1276 if (read(hp->rh_file, (char *)&wd, WHOD_HDR_SIZE) != WHOD_HDR_SIZE) { 1277 (void) sprintf(buffer, "%s ?", hp->rh_host); 1278 return(buffer); 1279 } 1280 (void) time(&now); 1281 if (now - wd.wd_recvtime > DOWN_THRESHOLD) { 1282 long interval; 1283 long days, hours, minutes; 1284 1285 interval = now - wd.wd_recvtime; 1286 minutes = (interval + 59) / 60; /* round to minutes */ 1287 hours = minutes / 60; /* extract hours from minutes */ 1288 minutes %= 60; /* remove hours from minutes */ 1289 days = hours / 24; /* extract days from hours */ 1290 hours %= 24; /* remove days from hours */ 1291 if (days > 7 || days < 0) 1292 (void) sprintf(buffer, "%s down", hp->rh_host); 1293 else if (days > 0) 1294 (void) sprintf(buffer, "%s %d+%d:%02d", 1295 hp->rh_host, days, hours, minutes); 1296 else 1297 (void) sprintf(buffer, "%s %d:%02d", 1298 hp->rh_host, hours, minutes); 1299 } else 1300 (void) sprintf(buffer, "%s %.1f", 1301 hp->rh_host, wd.wd_loadav[0]/100.0); 1302 return buffer; 1303 } 1304 #endif RWHO 1305 1306 getwinsize() 1307 { 1308 #ifdef TIOCGWINSZ 1309 struct winsize winsize; 1310 1311 /* the "-1" below is to avoid cursor wraparound problems */ 1312 if (!hasws && ioctl(2, TIOCGWINSZ, (char *)&winsize) >= 0 && 1313 winsize.ws_col != 0) 1314 columns = winsize.ws_col - 1; 1315 #endif 1316 } 1317 1318 #ifdef SIGWINCH 1319 sigwinch() 1320 { 1321 winchanged++; 1322 } 1323 #endif 1324 1325 char * 1326 strcpy1(p, q) 1327 register char *p, *q; 1328 { 1329 1330 while (*p++ = *q++) 1331 ; 1332 return p - 1; 1333 } 1334 1335 outc(c) 1336 char c; 1337 { 1338 if (dbug) 1339 printf("%s", unctrl(c)); 1340 else 1341 putchar(c); 1342 } 1343 1344 erroutc(c) 1345 char c; 1346 { 1347 if (dbug) 1348 fprintf(stderr, "%s", unctrl(c)); 1349 else 1350 putc(c, stderr); 1351 } 1352