display.c revision 239750
1/* 2 * Top users/processes display for Unix 3 * Version 3 4 * 5 * This program may be freely redistributed, 6 * but this entire comment MUST remain intact. 7 * 8 * Copyright (c) 1984, 1989, William LeFebvre, Rice University 9 * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University 10 * 11 * $FreeBSD: stable/9/contrib/top/display.c 239750 2012-08-27 19:55:19Z jhb $ 12 */ 13 14/* 15 * This file contains the routines that display information on the screen. 16 * Each section of the screen has two routines: one for initially writing 17 * all constant and dynamic text, and one for only updating the text that 18 * changes. The prefix "i_" is used on all the "initial" routines and the 19 * prefix "u_" is used for all the "updating" routines. 20 * 21 * ASSUMPTIONS: 22 * None of the "i_" routines use any of the termcap capabilities. 23 * In this way, those routines can be safely used on terminals that 24 * have minimal (or nonexistant) terminal capabilities. 25 * 26 * The routines are called in this order: *_loadave, i_timeofday, 27 * *_procstates, *_cpustates, *_memory, *_message, *_header, 28 * *_process, u_endscreen. 29 */ 30 31#include "os.h" 32#include <ctype.h> 33#include <time.h> 34#include <sys/time.h> 35 36#include "screen.h" /* interface to screen package */ 37#include "layout.h" /* defines for screen position layout */ 38#include "display.h" 39#include "top.h" 40#include "top.local.h" 41#include "boolean.h" 42#include "machine.h" /* we should eliminate this!!! */ 43#include "utils.h" 44 45#ifdef DEBUG 46FILE *debug; 47#endif 48 49/* imported from screen.c */ 50extern int overstrike; 51 52static int lmpid = 0; 53static int last_hi = 0; /* used in u_process and u_endscreen */ 54static int lastline = 0; 55static int display_width = MAX_COLS; 56 57#define lineindex(l) ((l)*display_width) 58 59char *printable(); 60 61/* things initialized by display_init and used thruout */ 62 63/* buffer of proc information lines for display updating */ 64char *screenbuf = NULL; 65 66static char **procstate_names; 67static char **cpustate_names; 68static char **memory_names; 69static char **arc_names; 70static char **swap_names; 71 72static int num_procstates; 73static int num_cpustates; 74static int num_memory; 75static int num_swap; 76 77static int *lprocstates; 78static int *lcpustates; 79static int *lmemory; 80static int *lswap; 81 82static int num_cpus; 83static int *cpustate_columns; 84static int cpustate_total_length; 85static int cpustates_column; 86 87static enum { OFF, ON, ERASE } header_status = ON; 88 89static int string_count(); 90static void summary_format(); 91static void line_update(); 92 93int x_lastpid = 10; 94int y_lastpid = 0; 95int x_loadave = 33; 96int x_loadave_nompid = 15; 97int y_loadave = 0; 98int x_procstate = 0; 99int y_procstate = 1; 100int x_brkdn = 15; 101int y_brkdn = 1; 102int x_mem = 5; 103int y_mem = 3; 104int x_arc = 5; 105int y_arc = 4; 106int x_swap = 6; 107int y_swap = 4; 108int y_message = 5; 109int x_header = 0; 110int y_header = 6; 111int x_idlecursor = 0; 112int y_idlecursor = 5; 113int y_procs = 7; 114 115int y_cpustates = 2; 116int Header_lines = 7; 117 118int display_resize() 119 120{ 121 register int lines; 122 123 /* first, deallocate any previous buffer that may have been there */ 124 if (screenbuf != NULL) 125 { 126 free(screenbuf); 127 } 128 129 /* calculate the current dimensions */ 130 /* if operating in "dumb" mode, we only need one line */ 131 lines = smart_terminal ? screen_length - Header_lines : 1; 132 133 if (lines < 0) 134 lines = 0; 135 /* we don't want more than MAX_COLS columns, since the machine-dependent 136 modules make static allocations based on MAX_COLS and we don't want 137 to run off the end of their buffers */ 138 display_width = screen_width; 139 if (display_width >= MAX_COLS) 140 { 141 display_width = MAX_COLS - 1; 142 } 143 144 /* now, allocate space for the screen buffer */ 145 screenbuf = (char *)malloc(lines * display_width); 146 if (screenbuf == (char *)NULL) 147 { 148 /* oops! */ 149 return(-1); 150 } 151 152 /* return number of lines available */ 153 /* for dumb terminals, pretend like we can show any amount */ 154 return(smart_terminal ? lines : Largest); 155} 156 157int display_updatecpus(statics) 158 159struct statics *statics; 160 161{ 162 register int *lp; 163 register int lines; 164 register int i; 165 166 /* call resize to do the dirty work */ 167 lines = display_resize(); 168 if (pcpu_stats) 169 num_cpus = statics->ncpus; 170 else 171 num_cpus = 1; 172 cpustates_column = 5; /* CPU: */ 173 if (num_cpus != 1) 174 cpustates_column += 2; /* CPU 0: */ 175 for (i = num_cpus; i > 9; i /= 10) 176 cpustates_column++; 177 178 /* fill the "last" array with all -1s, to insure correct updating */ 179 lp = lcpustates; 180 i = num_cpustates * num_cpus; 181 while (--i >= 0) 182 { 183 *lp++ = -1; 184 } 185 186 return(lines); 187} 188 189int display_init(statics) 190 191struct statics *statics; 192 193{ 194 register int lines; 195 register char **pp; 196 register int *ip; 197 register int i; 198 199 lines = display_updatecpus(statics); 200 201 /* only do the rest if we need to */ 202 if (lines > -1) 203 { 204 /* save pointers and allocate space for names */ 205 procstate_names = statics->procstate_names; 206 num_procstates = string_count(procstate_names); 207 lprocstates = (int *)malloc(num_procstates * sizeof(int)); 208 209 cpustate_names = statics->cpustate_names; 210 211 swap_names = statics->swap_names; 212 num_swap = string_count(swap_names); 213 lswap = (int *)malloc(num_swap * sizeof(int)); 214 num_cpustates = string_count(cpustate_names); 215 lcpustates = (int *)malloc(num_cpustates * sizeof(int) * statics->ncpus); 216 cpustate_columns = (int *)malloc(num_cpustates * sizeof(int)); 217 218 memory_names = statics->memory_names; 219 num_memory = string_count(memory_names); 220 lmemory = (int *)malloc(num_memory * sizeof(int)); 221 222 arc_names = statics->arc_names; 223 224 /* calculate starting columns where needed */ 225 cpustate_total_length = 0; 226 pp = cpustate_names; 227 ip = cpustate_columns; 228 while (*pp != NULL) 229 { 230 *ip++ = cpustate_total_length; 231 if ((i = strlen(*pp++)) > 0) 232 { 233 cpustate_total_length += i + 8; 234 } 235 } 236 } 237 238 /* return number of lines available */ 239 return(lines); 240} 241 242i_loadave(mpid, avenrun) 243 244int mpid; 245double *avenrun; 246 247{ 248 register int i; 249 250 /* i_loadave also clears the screen, since it is first */ 251 clear(); 252 253 /* mpid == -1 implies this system doesn't have an _mpid */ 254 if (mpid != -1) 255 { 256 printf("last pid: %5d; ", mpid); 257 } 258 259 printf("load averages"); 260 261 for (i = 0; i < 3; i++) 262 { 263 printf("%c %5.2f", 264 i == 0 ? ':' : ',', 265 avenrun[i]); 266 } 267 lmpid = mpid; 268} 269 270u_loadave(mpid, avenrun) 271 272int mpid; 273double *avenrun; 274 275{ 276 register int i; 277 278 if (mpid != -1) 279 { 280 /* change screen only when value has really changed */ 281 if (mpid != lmpid) 282 { 283 Move_to(x_lastpid, y_lastpid); 284 printf("%5d", mpid); 285 lmpid = mpid; 286 } 287 288 /* i remembers x coordinate to move to */ 289 i = x_loadave; 290 } 291 else 292 { 293 i = x_loadave_nompid; 294 } 295 296 /* move into position for load averages */ 297 Move_to(i, y_loadave); 298 299 /* display new load averages */ 300 /* we should optimize this and only display changes */ 301 for (i = 0; i < 3; i++) 302 { 303 printf("%s%5.2f", 304 i == 0 ? "" : ", ", 305 avenrun[i]); 306 } 307} 308 309i_timeofday(tod) 310 311time_t *tod; 312 313{ 314 /* 315 * Display the current time. 316 * "ctime" always returns a string that looks like this: 317 * 318 * Sun Sep 16 01:03:52 1973 319 * 012345678901234567890123 320 * 1 2 321 * 322 * We want indices 11 thru 18 (length 8). 323 */ 324 325 if (smart_terminal) 326 { 327 Move_to(screen_width - 8, 0); 328 } 329 else 330 { 331 fputs(" ", stdout); 332 } 333#ifdef DEBUG 334 { 335 char *foo; 336 foo = ctime(tod); 337 fputs(foo, stdout); 338 } 339#endif 340 printf("%-8.8s\n", &(ctime(tod)[11])); 341 lastline = 1; 342} 343 344static int ltotal = 0; 345static char procstates_buffer[MAX_COLS]; 346 347/* 348 * *_procstates(total, brkdn, names) - print the process summary line 349 * 350 * Assumptions: cursor is at the beginning of the line on entry 351 * lastline is valid 352 */ 353 354i_procstates(total, brkdn) 355 356int total; 357int *brkdn; 358 359{ 360 register int i; 361 362 /* write current number of processes and remember the value */ 363 printf("%d processes:", total); 364 ltotal = total; 365 366 /* put out enough spaces to get to column 15 */ 367 i = digits(total); 368 while (i++ < 4) 369 { 370 putchar(' '); 371 } 372 373 /* format and print the process state summary */ 374 summary_format(procstates_buffer, brkdn, procstate_names); 375 fputs(procstates_buffer, stdout); 376 377 /* save the numbers for next time */ 378 memcpy(lprocstates, brkdn, num_procstates * sizeof(int)); 379} 380 381u_procstates(total, brkdn) 382 383int total; 384int *brkdn; 385 386{ 387 static char new[MAX_COLS]; 388 register int i; 389 390 /* update number of processes only if it has changed */ 391 if (ltotal != total) 392 { 393 /* move and overwrite */ 394#if (x_procstate == 0) 395 Move_to(x_procstate, y_procstate); 396#else 397 /* cursor is already there...no motion needed */ 398 /* assert(lastline == 1); */ 399#endif 400 printf("%d", total); 401 402 /* if number of digits differs, rewrite the label */ 403 if (digits(total) != digits(ltotal)) 404 { 405 fputs(" processes:", stdout); 406 /* put out enough spaces to get to column 15 */ 407 i = digits(total); 408 while (i++ < 4) 409 { 410 putchar(' '); 411 } 412 /* cursor may end up right where we want it!!! */ 413 } 414 415 /* save new total */ 416 ltotal = total; 417 } 418 419 /* see if any of the state numbers has changed */ 420 if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0) 421 { 422 /* format and update the line */ 423 summary_format(new, brkdn, procstate_names); 424 line_update(procstates_buffer, new, x_brkdn, y_brkdn); 425 memcpy(lprocstates, brkdn, num_procstates * sizeof(int)); 426 } 427} 428 429#ifdef no_more 430/* 431 * *_cpustates(states, names) - print the cpu state percentages 432 * 433 * Assumptions: cursor is on the PREVIOUS line 434 */ 435 436/* cpustates_tag() calculates the correct tag to use to label the line */ 437 438char *cpustates_tag() 439 440{ 441 register char *use; 442 443 static char *short_tag = "CPU: "; 444 static char *long_tag = "CPU states: "; 445 446 /* if length + strlen(long_tag) >= screen_width, then we have to 447 use the shorter tag (we subtract 2 to account for ": ") */ 448 if (cpustate_total_length + (int)strlen(long_tag) - 2 >= screen_width) 449 { 450 use = short_tag; 451 } 452 else 453 { 454 use = long_tag; 455 } 456 457 /* set cpustates_column accordingly then return result */ 458 cpustates_column = strlen(use); 459 return(use); 460} 461#endif 462 463i_cpustates(states) 464 465register int *states; 466 467{ 468 register int i = 0; 469 register int value; 470 register char **names; 471 register char *thisname; 472 int cpu; 473 474for (cpu = 0; cpu < num_cpus; cpu++) { 475 names = cpustate_names; 476 477 /* print tag and bump lastline */ 478 if (num_cpus == 1) 479 printf("\nCPU: "); 480 else { 481 value = printf("\nCPU %d: ", cpu); 482 while (value++ <= cpustates_column) 483 printf(" "); 484 } 485 lastline++; 486 487 /* now walk thru the names and print the line */ 488 while ((thisname = *names++) != NULL) 489 { 490 if (*thisname != '\0') 491 { 492 /* retrieve the value and remember it */ 493 value = *states++; 494 495 /* if percentage is >= 1000, print it as 100% */ 496 printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"), 497 (i++ % num_cpustates) == 0 ? "" : ", ", 498 ((float)value)/10., 499 thisname); 500 } 501 } 502} 503 504 /* copy over values into "last" array */ 505 memcpy(lcpustates, states, num_cpustates * sizeof(int) * num_cpus); 506} 507 508u_cpustates(states) 509 510register int *states; 511 512{ 513 register int value; 514 register char **names; 515 register char *thisname; 516 register int *lp; 517 register int *colp; 518 int cpu; 519 520for (cpu = 0; cpu < num_cpus; cpu++) { 521 names = cpustate_names; 522 523 Move_to(cpustates_column, y_cpustates + cpu); 524 lastline = y_cpustates + cpu; 525 lp = lcpustates + (cpu * num_cpustates); 526 colp = cpustate_columns; 527 528 /* we could be much more optimal about this */ 529 while ((thisname = *names++) != NULL) 530 { 531 if (*thisname != '\0') 532 { 533 /* did the value change since last time? */ 534 if (*lp != *states) 535 { 536 /* yes, move and change */ 537 Move_to(cpustates_column + *colp, y_cpustates + cpu); 538 lastline = y_cpustates + cpu; 539 540 /* retrieve value and remember it */ 541 value = *states; 542 543 /* if percentage is >= 1000, print it as 100% */ 544 printf((value >= 1000 ? "%4.0f" : "%4.1f"), 545 ((double)value)/10.); 546 547 /* remember it for next time */ 548 *lp = value; 549 } 550 } 551 552 /* increment and move on */ 553 lp++; 554 states++; 555 colp++; 556 } 557} 558} 559 560z_cpustates() 561 562{ 563 register int i = 0; 564 register char **names; 565 register char *thisname; 566 register int *lp; 567 int cpu, value; 568 569for (cpu = 0; cpu < num_cpus; cpu++) { 570 names = cpustate_names; 571 572 /* show tag and bump lastline */ 573 if (num_cpus == 1) 574 printf("\nCPU: "); 575 else { 576 value = printf("\nCPU %d: ", cpu); 577 while (value++ <= cpustates_column) 578 printf(" "); 579 } 580 lastline++; 581 582 while ((thisname = *names++) != NULL) 583 { 584 if (*thisname != '\0') 585 { 586 printf("%s %% %s", (i++ % num_cpustates) == 0 ? "" : ", ", thisname); 587 } 588 } 589} 590 591 /* fill the "last" array with all -1s, to insure correct updating */ 592 lp = lcpustates; 593 i = num_cpustates * num_cpus; 594 while (--i >= 0) 595 { 596 *lp++ = -1; 597 } 598} 599 600/* 601 * *_memory(stats) - print "Memory: " followed by the memory summary string 602 * 603 * Assumptions: cursor is on "lastline" 604 * for i_memory ONLY: cursor is on the previous line 605 */ 606 607char memory_buffer[MAX_COLS]; 608 609i_memory(stats) 610 611int *stats; 612 613{ 614 fputs("\nMem: ", stdout); 615 lastline++; 616 617 /* format and print the memory summary */ 618 summary_format(memory_buffer, stats, memory_names); 619 fputs(memory_buffer, stdout); 620} 621 622u_memory(stats) 623 624int *stats; 625 626{ 627 static char new[MAX_COLS]; 628 629 /* format the new line */ 630 summary_format(new, stats, memory_names); 631 line_update(memory_buffer, new, x_mem, y_mem); 632} 633 634/* 635 * *_arc(stats) - print "ARC: " followed by the ARC summary string 636 * 637 * Assumptions: cursor is on "lastline" 638 * for i_arc ONLY: cursor is on the previous line 639 */ 640char arc_buffer[MAX_COLS]; 641 642i_arc(stats) 643 644int *stats; 645 646{ 647 if (arc_names == NULL) 648 return (0); 649 650 fputs("\nARC: ", stdout); 651 lastline++; 652 653 /* format and print the memory summary */ 654 summary_format(arc_buffer, stats, arc_names); 655 fputs(arc_buffer, stdout); 656} 657 658u_arc(stats) 659 660int *stats; 661 662{ 663 static char new[MAX_COLS]; 664 665 if (arc_names == NULL) 666 return (0); 667 668 /* format the new line */ 669 summary_format(new, stats, arc_names); 670 line_update(arc_buffer, new, x_arc, y_arc); 671} 672 673 674/* 675 * *_swap(stats) - print "Swap: " followed by the swap summary string 676 * 677 * Assumptions: cursor is on "lastline" 678 * for i_swap ONLY: cursor is on the previous line 679 */ 680 681char swap_buffer[MAX_COLS]; 682 683i_swap(stats) 684 685int *stats; 686 687{ 688 fputs("\nSwap: ", stdout); 689 lastline++; 690 691 /* format and print the swap summary */ 692 summary_format(swap_buffer, stats, swap_names); 693 fputs(swap_buffer, stdout); 694} 695 696u_swap(stats) 697 698int *stats; 699 700{ 701 static char new[MAX_COLS]; 702 703 /* format the new line */ 704 summary_format(new, stats, swap_names); 705 line_update(swap_buffer, new, x_swap, y_swap); 706} 707 708/* 709 * *_message() - print the next pending message line, or erase the one 710 * that is there. 711 * 712 * Note that u_message is (currently) the same as i_message. 713 * 714 * Assumptions: lastline is consistent 715 */ 716 717/* 718 * i_message is funny because it gets its message asynchronously (with 719 * respect to screen updates). 720 */ 721 722static char next_msg[MAX_COLS + 5]; 723static int msglen = 0; 724/* Invariant: msglen is always the length of the message currently displayed 725 on the screen (even when next_msg doesn't contain that message). */ 726 727i_message() 728 729{ 730 while (lastline < y_message) 731 { 732 fputc('\n', stdout); 733 lastline++; 734 } 735 if (next_msg[0] != '\0') 736 { 737 standout(next_msg); 738 msglen = strlen(next_msg); 739 next_msg[0] = '\0'; 740 } 741 else if (msglen > 0) 742 { 743 (void) clear_eol(msglen); 744 msglen = 0; 745 } 746} 747 748u_message() 749 750{ 751 i_message(); 752} 753 754static int header_length; 755 756/* 757 * Trim a header string to the current display width and return a newly 758 * allocated area with the trimmed header. 759 */ 760 761char * 762trim_header(text) 763 764char *text; 765 766{ 767 char *s; 768 int width; 769 770 s = NULL; 771 width = display_width; 772 header_length = strlen(text); 773 if (header_length >= width) { 774 s = malloc((width + 1) * sizeof(char)); 775 if (s == NULL) 776 return (NULL); 777 strncpy(s, text, width); 778 s[width] = '\0'; 779 } 780 return (s); 781} 782 783/* 784 * *_header(text) - print the header for the process area 785 * 786 * Assumptions: cursor is on the previous line and lastline is consistent 787 */ 788 789i_header(text) 790 791char *text; 792 793{ 794 char *s; 795 796 s = trim_header(text); 797 if (s != NULL) 798 text = s; 799 800 if (header_status == ON) 801 { 802 putchar('\n'); 803 fputs(text, stdout); 804 lastline++; 805 } 806 else if (header_status == ERASE) 807 { 808 header_status = OFF; 809 } 810 free(s); 811} 812 813/*ARGSUSED*/ 814u_header(text) 815 816char *text; /* ignored */ 817 818{ 819 820 if (header_status == ERASE) 821 { 822 putchar('\n'); 823 lastline++; 824 clear_eol(header_length); 825 header_status = OFF; 826 } 827} 828 829/* 830 * *_process(line, thisline) - print one process line 831 * 832 * Assumptions: lastline is consistent 833 */ 834 835i_process(line, thisline) 836 837int line; 838char *thisline; 839 840{ 841 register char *p; 842 register char *base; 843 844 /* make sure we are on the correct line */ 845 while (lastline < y_procs + line) 846 { 847 putchar('\n'); 848 lastline++; 849 } 850 851 /* truncate the line to conform to our current screen width */ 852 thisline[display_width] = '\0'; 853 854 /* write the line out */ 855 fputs(thisline, stdout); 856 857 /* copy it in to our buffer */ 858 base = smart_terminal ? screenbuf + lineindex(line) : screenbuf; 859 p = strecpy(base, thisline); 860 861 /* zero fill the rest of it */ 862 memzero(p, display_width - (p - base)); 863} 864 865u_process(line, newline) 866 867int line; 868char *newline; 869 870{ 871 register char *optr; 872 register int screen_line = line + Header_lines; 873 register char *bufferline; 874 875 /* remember a pointer to the current line in the screen buffer */ 876 bufferline = &screenbuf[lineindex(line)]; 877 878 /* truncate the line to conform to our current screen width */ 879 newline[display_width] = '\0'; 880 881 /* is line higher than we went on the last display? */ 882 if (line >= last_hi) 883 { 884 /* yes, just ignore screenbuf and write it out directly */ 885 /* get positioned on the correct line */ 886 if (screen_line - lastline == 1) 887 { 888 putchar('\n'); 889 lastline++; 890 } 891 else 892 { 893 Move_to(0, screen_line); 894 lastline = screen_line; 895 } 896 897 /* now write the line */ 898 fputs(newline, stdout); 899 900 /* copy it in to the buffer */ 901 optr = strecpy(bufferline, newline); 902 903 /* zero fill the rest of it */ 904 memzero(optr, display_width - (optr - bufferline)); 905 } 906 else 907 { 908 line_update(bufferline, newline, 0, line + Header_lines); 909 } 910} 911 912u_endscreen(hi) 913 914register int hi; 915 916{ 917 register int screen_line = hi + Header_lines; 918 register int i; 919 920 if (smart_terminal) 921 { 922 if (hi < last_hi) 923 { 924 /* need to blank the remainder of the screen */ 925 /* but only if there is any screen left below this line */ 926 if (lastline + 1 < screen_length) 927 { 928 /* efficiently move to the end of currently displayed info */ 929 if (screen_line - lastline < 5) 930 { 931 while (lastline < screen_line) 932 { 933 putchar('\n'); 934 lastline++; 935 } 936 } 937 else 938 { 939 Move_to(0, screen_line); 940 lastline = screen_line; 941 } 942 943 if (clear_to_end) 944 { 945 /* we can do this the easy way */ 946 putcap(clear_to_end); 947 } 948 else 949 { 950 /* use clear_eol on each line */ 951 i = hi; 952 while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi) 953 { 954 putchar('\n'); 955 } 956 } 957 } 958 } 959 last_hi = hi; 960 961 /* move the cursor to a pleasant place */ 962 Move_to(x_idlecursor, y_idlecursor); 963 lastline = y_idlecursor; 964 } 965 else 966 { 967 /* separate this display from the next with some vertical room */ 968 fputs("\n\n", stdout); 969 } 970} 971 972display_header(t) 973 974int t; 975 976{ 977 if (t) 978 { 979 header_status = ON; 980 } 981 else if (header_status == ON) 982 { 983 header_status = ERASE; 984 } 985} 986 987/*VARARGS2*/ 988new_message(type, msgfmt, a1, a2, a3) 989 990int type; 991char *msgfmt; 992caddr_t a1, a2, a3; 993 994{ 995 register int i; 996 997 /* first, format the message */ 998 (void) snprintf(next_msg, sizeof(next_msg), msgfmt, a1, a2, a3); 999 1000 if (msglen > 0) 1001 { 1002 /* message there already -- can we clear it? */ 1003 if (!overstrike) 1004 { 1005 /* yes -- write it and clear to end */ 1006 i = strlen(next_msg); 1007 if ((type & MT_delayed) == 0) 1008 { 1009 type & MT_standout ? standout(next_msg) : 1010 fputs(next_msg, stdout); 1011 (void) clear_eol(msglen - i); 1012 msglen = i; 1013 next_msg[0] = '\0'; 1014 } 1015 } 1016 } 1017 else 1018 { 1019 if ((type & MT_delayed) == 0) 1020 { 1021 type & MT_standout ? standout(next_msg) : fputs(next_msg, stdout); 1022 msglen = strlen(next_msg); 1023 next_msg[0] = '\0'; 1024 } 1025 } 1026} 1027 1028clear_message() 1029 1030{ 1031 if (clear_eol(msglen) == 1) 1032 { 1033 putchar('\r'); 1034 } 1035} 1036 1037readline(buffer, size, numeric) 1038 1039char *buffer; 1040int size; 1041int numeric; 1042 1043{ 1044 register char *ptr = buffer; 1045 register char ch; 1046 register char cnt = 0; 1047 register char maxcnt = 0; 1048 1049 /* allow room for null terminator */ 1050 size -= 1; 1051 1052 /* read loop */ 1053 while ((fflush(stdout), read(0, ptr, 1) > 0)) 1054 { 1055 /* newline means we are done */ 1056 if ((ch = *ptr) == '\n' || ch == '\r') 1057 { 1058 break; 1059 } 1060 1061 /* handle special editing characters */ 1062 if (ch == ch_kill) 1063 { 1064 /* kill line -- account for overstriking */ 1065 if (overstrike) 1066 { 1067 msglen += maxcnt; 1068 } 1069 1070 /* return null string */ 1071 *buffer = '\0'; 1072 putchar('\r'); 1073 return(-1); 1074 } 1075 else if (ch == ch_erase) 1076 { 1077 /* erase previous character */ 1078 if (cnt <= 0) 1079 { 1080 /* none to erase! */ 1081 putchar('\7'); 1082 } 1083 else 1084 { 1085 fputs("\b \b", stdout); 1086 ptr--; 1087 cnt--; 1088 } 1089 } 1090 /* check for character validity and buffer overflow */ 1091 else if (cnt == size || (numeric && !isdigit(ch)) || 1092 !isprint(ch)) 1093 { 1094 /* not legal */ 1095 putchar('\7'); 1096 } 1097 else 1098 { 1099 /* echo it and store it in the buffer */ 1100 putchar(ch); 1101 ptr++; 1102 cnt++; 1103 if (cnt > maxcnt) 1104 { 1105 maxcnt = cnt; 1106 } 1107 } 1108 } 1109 1110 /* all done -- null terminate the string */ 1111 *ptr = '\0'; 1112 1113 /* account for the extra characters in the message area */ 1114 /* (if terminal overstrikes, remember the furthest they went) */ 1115 msglen += overstrike ? maxcnt : cnt; 1116 1117 /* return either inputted number or string length */ 1118 putchar('\r'); 1119 return(cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt); 1120} 1121 1122/* internal support routines */ 1123 1124static int string_count(pp) 1125 1126register char **pp; 1127 1128{ 1129 register int cnt; 1130 1131 cnt = 0; 1132 while (*pp++ != NULL) 1133 { 1134 cnt++; 1135 } 1136 return(cnt); 1137} 1138 1139static void summary_format(str, numbers, names) 1140 1141char *str; 1142int *numbers; 1143register char **names; 1144 1145{ 1146 register char *p; 1147 register int num; 1148 register char *thisname; 1149 register int useM = No; 1150 1151 /* format each number followed by its string */ 1152 p = str; 1153 while ((thisname = *names++) != NULL) 1154 { 1155 /* get the number to format */ 1156 num = *numbers++; 1157 1158 /* display only non-zero numbers */ 1159 if (num > 0) 1160 { 1161 /* is this number in kilobytes? */ 1162 if (thisname[0] == 'K') 1163 { 1164 /* yes: format it as a memory value */ 1165 p = strecpy(p, format_k(num)); 1166 1167 /* skip over the K, since it was included by format_k */ 1168 p = strecpy(p, thisname+1); 1169 } 1170 else 1171 { 1172 p = strecpy(p, itoa(num)); 1173 p = strecpy(p, thisname); 1174 } 1175 } 1176 1177 /* ignore negative numbers, but display corresponding string */ 1178 else if (num < 0) 1179 { 1180 p = strecpy(p, thisname); 1181 } 1182 } 1183 1184 /* if the last two characters in the string are ", ", delete them */ 1185 p -= 2; 1186 if (p >= str && p[0] == ',' && p[1] == ' ') 1187 { 1188 *p = '\0'; 1189 } 1190} 1191 1192static void line_update(old, new, start, line) 1193 1194register char *old; 1195register char *new; 1196int start; 1197int line; 1198 1199{ 1200 register int ch; 1201 register int diff; 1202 register int newcol = start + 1; 1203 register int lastcol = start; 1204 char cursor_on_line = No; 1205 char *current; 1206 1207 /* compare the two strings and only rewrite what has changed */ 1208 current = old; 1209#ifdef DEBUG 1210 fprintf(debug, "line_update, starting at %d\n", start); 1211 fputs(old, debug); 1212 fputc('\n', debug); 1213 fputs(new, debug); 1214 fputs("\n-\n", debug); 1215#endif 1216 1217 /* start things off on the right foot */ 1218 /* this is to make sure the invariants get set up right */ 1219 if ((ch = *new++) != *old) 1220 { 1221 if (line - lastline == 1 && start == 0) 1222 { 1223 putchar('\n'); 1224 } 1225 else 1226 { 1227 Move_to(start, line); 1228 } 1229 cursor_on_line = Yes; 1230 putchar(ch); 1231 *old = ch; 1232 lastcol = 1; 1233 } 1234 old++; 1235 1236 /* 1237 * main loop -- check each character. If the old and new aren't the 1238 * same, then update the display. When the distance from the 1239 * current cursor position to the new change is small enough, 1240 * the characters that belong there are written to move the 1241 * cursor over. 1242 * 1243 * Invariants: 1244 * lastcol is the column where the cursor currently is sitting 1245 * (always one beyond the end of the last mismatch). 1246 */ 1247 do /* yes, a do...while */ 1248 { 1249 if ((ch = *new++) != *old) 1250 { 1251 /* new character is different from old */ 1252 /* make sure the cursor is on top of this character */ 1253 diff = newcol - lastcol; 1254 if (diff > 0) 1255 { 1256 /* some motion is required--figure out which is shorter */ 1257 if (diff < 6 && cursor_on_line) 1258 { 1259 /* overwrite old stuff--get it out of the old buffer */ 1260 printf("%.*s", diff, ¤t[lastcol-start]); 1261 } 1262 else 1263 { 1264 /* use cursor addressing */ 1265 Move_to(newcol, line); 1266 cursor_on_line = Yes; 1267 } 1268 /* remember where the cursor is */ 1269 lastcol = newcol + 1; 1270 } 1271 else 1272 { 1273 /* already there, update position */ 1274 lastcol++; 1275 } 1276 1277 /* write what we need to */ 1278 if (ch == '\0') 1279 { 1280 /* at the end--terminate with a clear-to-end-of-line */ 1281 (void) clear_eol(strlen(old)); 1282 } 1283 else 1284 { 1285 /* write the new character */ 1286 putchar(ch); 1287 } 1288 /* put the new character in the screen buffer */ 1289 *old = ch; 1290 } 1291 1292 /* update working column and screen buffer pointer */ 1293 newcol++; 1294 old++; 1295 1296 } while (ch != '\0'); 1297 1298 /* zero out the rest of the line buffer -- MUST BE DONE! */ 1299 diff = display_width - newcol; 1300 if (diff > 0) 1301 { 1302 memzero(old, diff); 1303 } 1304 1305 /* remember where the current line is */ 1306 if (cursor_on_line) 1307 { 1308 lastline = line; 1309 } 1310} 1311 1312/* 1313 * printable(str) - make the string pointed to by "str" into one that is 1314 * printable (i.e.: all ascii), by converting all non-printable 1315 * characters into '?'. Replacements are done in place and a pointer 1316 * to the original buffer is returned. 1317 */ 1318 1319char *printable(str) 1320 1321char *str; 1322 1323{ 1324 register char *ptr; 1325 register char ch; 1326 1327 ptr = str; 1328 while ((ch = *ptr) != '\0') 1329 { 1330 if (!isprint(ch)) 1331 { 1332 *ptr = '?'; 1333 } 1334 ptr++; 1335 } 1336 return(str); 1337} 1338 1339i_uptime(bt, tod) 1340 1341struct timeval* bt; 1342time_t *tod; 1343 1344{ 1345 time_t uptime; 1346 int days, hrs, mins, secs; 1347 1348 if (bt->tv_sec != -1) { 1349 uptime = *tod - bt->tv_sec; 1350 days = uptime / 86400; 1351 uptime %= 86400; 1352 hrs = uptime / 3600; 1353 uptime %= 3600; 1354 mins = uptime / 60; 1355 secs = uptime % 60; 1356 1357 /* 1358 * Display the uptime. 1359 */ 1360 1361 if (smart_terminal) 1362 { 1363 Move_to((screen_width - 24) - (days > 9 ? 1 : 0), 0); 1364 } 1365 else 1366 { 1367 fputs(" ", stdout); 1368 } 1369 printf(" up %d+%02d:%02d:%02d", days, hrs, mins, secs); 1370 } 1371} 1372