2 * Top users/processes display for Unix
5 * This program may be freely redistributed,
6 * but this entire comment MUST remain intact.
8 * Copyright (c) 1984, 1989, William LeFebvre, Rice University
9 * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
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.
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.
26 * The routines are called in this order: *_loadave, i_timeofday,
27 * *_procstates, *_cpustates, *_memory, *_message, *_header,
28 * *_process, u_endscreen.
36 #include "screen.h" /* interface to screen package */
37 #include "layout.h" /* defines for screen position layout */
40 #include "top.local.h"
42 #include "machine.h" /* we should eliminate this!!! */
49 /* imported from screen.c */
50 extern int overstrike;
53 static int last_hi = 0; /* used in u_process and u_endscreen */
54 static int lastline = 0;
55 static int display_width = MAX_COLS;
57 #define lineindex(l) ((l)*display_width)
61 /* things initialized by display_init and used thruout */
63 /* buffer of proc information lines for display updating */
64 char *screenbuf = NULL;
66 static char **procstate_names;
67 static char **cpustate_names;
68 static char **memory_names;
69 static char **swap_names;
71 static int num_procstates;
72 static int num_cpustates;
73 static int num_memory;
76 static int *lprocstates;
77 static int *lcpustates;
82 static int *cpustate_columns;
83 static int cpustate_total_length;
84 static int cpustates_column;
86 static enum { OFF, ON, ERASE } header_status = ON;
88 static int string_count();
89 static void summary_format();
90 static void line_update();
95 int x_loadave_nompid = 15;
108 int x_idlecursor = 0;
109 int y_idlecursor = 5;
113 int Header_lines = 7;
120 /* first, deallocate any previous buffer that may have been there */
121 if (screenbuf != NULL)
126 /* calculate the current dimensions */
127 /* if operating in "dumb" mode, we only need one line */
128 lines = smart_terminal ? screen_length - Header_lines : 1;
132 /* we don't want more than MAX_COLS columns, since the machine-dependent
133 modules make static allocations based on MAX_COLS and we don't want
134 to run off the end of their buffers */
135 display_width = screen_width;
136 if (display_width >= MAX_COLS)
138 display_width = MAX_COLS - 1;
141 /* now, allocate space for the screen buffer */
142 screenbuf = (char *)malloc(lines * display_width);
143 if (screenbuf == (char *)NULL)
149 /* return number of lines available */
150 /* for dumb terminals, pretend like we can show any amount */
151 return(smart_terminal ? lines : Largest);
154 int display_updatecpus(statics)
156 struct statics *statics;
163 /* call resize to do the dirty work */
164 lines = display_resize();
166 num_cpus = statics->ncpus;
169 cpustates_column = 5; /* CPU: */
171 cpustates_column += 2; /* CPU 0: */
172 for (i = num_cpus; i > 9; i /= 10)
175 /* fill the "last" array with all -1s, to insure correct updating */
177 i = num_cpustates * num_cpus;
186 int display_init(statics)
188 struct statics *statics;
196 lines = display_updatecpus(statics);
198 /* only do the rest if we need to */
201 /* save pointers and allocate space for names */
202 procstate_names = statics->procstate_names;
203 num_procstates = string_count(procstate_names);
204 lprocstates = (int *)malloc(num_procstates * sizeof(int));
206 cpustate_names = statics->cpustate_names;
208 swap_names = statics->swap_names;
209 num_swap = string_count(swap_names);
210 lswap = (int *)malloc(num_swap * sizeof(int));
211 num_cpustates = string_count(cpustate_names);
212 lcpustates = (int *)malloc(num_cpustates * sizeof(int) * statics->ncpus);
213 cpustate_columns = (int *)malloc(num_cpustates * sizeof(int));
215 memory_names = statics->memory_names;
216 num_memory = string_count(memory_names);
217 lmemory = (int *)malloc(num_memory * sizeof(int));
219 /* calculate starting columns where needed */
220 cpustate_total_length = 0;
222 ip = cpustate_columns;
225 *ip++ = cpustate_total_length;
226 if ((i = strlen(*pp++)) > 0)
228 cpustate_total_length += i + 8;
233 /* return number of lines available */
237 i_loadave(mpid, avenrun)
245 /* i_loadave also clears the screen, since it is first */
248 /* mpid == -1 implies this system doesn't have an _mpid */
251 printf("last pid: %5d; ", mpid);
254 printf("load averages");
256 for (i = 0; i < 3; i++)
265 u_loadave(mpid, avenrun)
275 /* change screen only when value has really changed */
278 Move_to(x_lastpid, y_lastpid);
283 /* i remembers x coordinate to move to */
288 i = x_loadave_nompid;
291 /* move into position for load averages */
292 Move_to(i, y_loadave);
294 /* display new load averages */
295 /* we should optimize this and only display changes */
296 for (i = 0; i < 3; i++)
310 * Display the current time.
311 * "ctime" always returns a string that looks like this:
313 * Sun Sep 16 01:03:52 1973
314 * 012345678901234567890123
317 * We want indices 11 thru 18 (length 8).
322 Move_to(screen_width - 8, 0);
335 printf("%-8.8s\n", &(ctime(tod)[11]));
339 static int ltotal = 0;
340 static char procstates_buffer[MAX_COLS];
343 * *_procstates(total, brkdn, names) - print the process summary line
345 * Assumptions: cursor is at the beginning of the line on entry
349 i_procstates(total, brkdn)
357 /* write current number of processes and remember the value */
358 printf("%d processes:", total);
361 /* put out enough spaces to get to column 15 */
368 /* format and print the process state summary */
369 summary_format(procstates_buffer, brkdn, procstate_names);
370 fputs(procstates_buffer, stdout);
372 /* save the numbers for next time */
373 memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
376 u_procstates(total, brkdn)
382 static char new[MAX_COLS];
385 /* update number of processes only if it has changed */
388 /* move and overwrite */
389 #if (x_procstate == 0)
390 Move_to(x_procstate, y_procstate);
392 /* cursor is already there...no motion needed */
393 /* assert(lastline == 1); */
397 /* if number of digits differs, rewrite the label */
398 if (digits(total) != digits(ltotal))
400 fputs(" processes:", stdout);
401 /* put out enough spaces to get to column 15 */
407 /* cursor may end up right where we want it!!! */
414 /* see if any of the state numbers has changed */
415 if (memcmp(lprocstates, brkdn, num_procstates * sizeof(int)) != 0)
417 /* format and update the line */
418 summary_format(new, brkdn, procstate_names);
419 line_update(procstates_buffer, new, x_brkdn, y_brkdn);
420 memcpy(lprocstates, brkdn, num_procstates * sizeof(int));
426 * *_cpustates(states, names) - print the cpu state percentages
428 * Assumptions: cursor is on the PREVIOUS line
431 /* cpustates_tag() calculates the correct tag to use to label the line */
433 char *cpustates_tag()
438 static char *short_tag = "CPU: ";
439 static char *long_tag = "CPU states: ";
441 /* if length + strlen(long_tag) >= screen_width, then we have to
442 use the shorter tag (we subtract 2 to account for ": ") */
443 if (cpustate_total_length + (int)strlen(long_tag) - 2 >= screen_width)
452 /* set cpustates_column accordingly then return result */
453 cpustates_column = strlen(use);
460 register int *states;
465 register char **names;
466 register char *thisname;
469 for (cpu = 0; cpu < num_cpus; cpu++) {
470 names = cpustate_names;
472 /* print tag and bump lastline */
476 value = printf("\nCPU %d: ", cpu);
477 while (value++ <= cpustates_column)
482 /* now walk thru the names and print the line */
483 while ((thisname = *names++) != NULL)
485 if (*thisname != '\0')
487 /* retrieve the value and remember it */
490 /* if percentage is >= 1000, print it as 100% */
491 printf((value >= 1000 ? "%s%4.0f%% %s" : "%s%4.1f%% %s"),
492 (i++ % num_cpustates) == 0 ? "" : ", ",
499 /* copy over values into "last" array */
500 memcpy(lcpustates, states, num_cpustates * sizeof(int) * num_cpus);
505 register int *states;
509 register char **names;
510 register char *thisname;
515 for (cpu = 0; cpu < num_cpus; cpu++) {
516 names = cpustate_names;
518 Move_to(cpustates_column, y_cpustates + cpu);
519 lastline = y_cpustates + cpu;
520 lp = lcpustates + (cpu * num_cpustates);
521 colp = cpustate_columns;
523 /* we could be much more optimal about this */
524 while ((thisname = *names++) != NULL)
526 if (*thisname != '\0')
528 /* did the value change since last time? */
531 /* yes, move and change */
532 Move_to(cpustates_column + *colp, y_cpustates + cpu);
533 lastline = y_cpustates + cpu;
535 /* retrieve value and remember it */
538 /* if percentage is >= 1000, print it as 100% */
539 printf((value >= 1000 ? "%4.0f" : "%4.1f"),
540 ((double)value)/10.);
542 /* remember it for next time */
547 /* increment and move on */
559 register char **names;
560 register char *thisname;
564 for (cpu = 0; cpu < num_cpus; cpu++) {
565 names = cpustate_names;
567 /* show tag and bump lastline */
571 value = printf("\nCPU %d: ", cpu);
572 while (value++ <= cpustates_column)
577 while ((thisname = *names++) != NULL)
579 if (*thisname != '\0')
581 printf("%s %% %s", (i++ % num_cpustates) == 0 ? "" : ", ", thisname);
586 /* fill the "last" array with all -1s, to insure correct updating */
588 i = num_cpustates * num_cpus;
596 * *_memory(stats) - print "Memory: " followed by the memory summary string
598 * Assumptions: cursor is on "lastline"
599 * for i_memory ONLY: cursor is on the previous line
602 char memory_buffer[MAX_COLS];
609 fputs("\nMem: ", stdout);
612 /* format and print the memory summary */
613 summary_format(memory_buffer, stats, memory_names);
614 fputs(memory_buffer, stdout);
622 static char new[MAX_COLS];
624 /* format the new line */
625 summary_format(new, stats, memory_names);
626 line_update(memory_buffer, new, x_mem, y_mem);
630 * *_swap(stats) - print "Swap: " followed by the swap summary string
632 * Assumptions: cursor is on "lastline"
633 * for i_swap ONLY: cursor is on the previous line
636 char swap_buffer[MAX_COLS];
643 fputs("\nSwap: ", stdout);
646 /* format and print the swap summary */
647 summary_format(swap_buffer, stats, swap_names);
648 fputs(swap_buffer, stdout);
656 static char new[MAX_COLS];
658 /* format the new line */
659 summary_format(new, stats, swap_names);
660 line_update(swap_buffer, new, x_swap, y_swap);
664 * *_message() - print the next pending message line, or erase the one
667 * Note that u_message is (currently) the same as i_message.
669 * Assumptions: lastline is consistent
673 * i_message is funny because it gets its message asynchronously (with
674 * respect to screen updates).
677 static char next_msg[MAX_COLS + 5];
678 static int msglen = 0;
679 /* Invariant: msglen is always the length of the message currently displayed
680 on the screen (even when next_msg doesn't contain that message). */
685 while (lastline < y_message)
690 if (next_msg[0] != '\0')
693 msglen = strlen(next_msg);
698 (void) clear_eol(msglen);
709 static int header_length;
712 * Trim a header string to the current display width and return a newly
713 * allocated area with the trimmed header.
726 width = display_width;
727 header_length = strlen(text);
728 if (header_length >= width) {
729 s = malloc((width + 1) * sizeof(char));
732 strncpy(s, text, width);
739 * *_header(text) - print the header for the process area
741 * Assumptions: cursor is on the previous line and lastline is consistent
751 s = trim_header(text);
755 if (header_status == ON)
761 else if (header_status == ERASE)
771 char *text; /* ignored */
775 if (header_status == ERASE)
779 clear_eol(header_length);
785 * *_process(line, thisline) - print one process line
787 * Assumptions: lastline is consistent
790 i_process(line, thisline)
799 /* make sure we are on the correct line */
800 while (lastline < y_procs + line)
806 /* truncate the line to conform to our current screen width */
807 thisline[display_width] = '\0';
809 /* write the line out */
810 fputs(thisline, stdout);
812 /* copy it in to our buffer */
813 base = smart_terminal ? screenbuf + lineindex(line) : screenbuf;
814 p = strecpy(base, thisline);
816 /* zero fill the rest of it */
817 memzero(p, display_width - (p - base));
820 u_process(line, newline)
827 register int screen_line = line + Header_lines;
828 register char *bufferline;
830 /* remember a pointer to the current line in the screen buffer */
831 bufferline = &screenbuf[lineindex(line)];
833 /* truncate the line to conform to our current screen width */
834 newline[display_width] = '\0';
836 /* is line higher than we went on the last display? */
839 /* yes, just ignore screenbuf and write it out directly */
840 /* get positioned on the correct line */
841 if (screen_line - lastline == 1)
848 Move_to(0, screen_line);
849 lastline = screen_line;
852 /* now write the line */
853 fputs(newline, stdout);
855 /* copy it in to the buffer */
856 optr = strecpy(bufferline, newline);
858 /* zero fill the rest of it */
859 memzero(optr, display_width - (optr - bufferline));
863 line_update(bufferline, newline, 0, line + Header_lines);
872 register int screen_line = hi + Header_lines;
879 /* need to blank the remainder of the screen */
880 /* but only if there is any screen left below this line */
881 if (lastline + 1 < screen_length)
883 /* efficiently move to the end of currently displayed info */
884 if (screen_line - lastline < 5)
886 while (lastline < screen_line)
894 Move_to(0, screen_line);
895 lastline = screen_line;
900 /* we can do this the easy way */
901 putcap(clear_to_end);
905 /* use clear_eol on each line */
907 while ((void) clear_eol(strlen(&screenbuf[lineindex(i++)])), i < last_hi)
916 /* move the cursor to a pleasant place */
917 Move_to(x_idlecursor, y_idlecursor);
918 lastline = y_idlecursor;
922 /* separate this display from the next with some vertical room */
923 fputs("\n\n", stdout);
936 else if (header_status == ON)
938 header_status = ERASE;
943 new_message(type, msgfmt, a1, a2, a3)
952 /* first, format the message */
953 (void) snprintf(next_msg, sizeof(next_msg), msgfmt, a1, a2, a3);
957 /* message there already -- can we clear it? */
960 /* yes -- write it and clear to end */
961 i = strlen(next_msg);
962 if ((type & MT_delayed) == 0)
964 type & MT_standout ? standout(next_msg) :
965 fputs(next_msg, stdout);
966 (void) clear_eol(msglen - i);
974 if ((type & MT_delayed) == 0)
976 type & MT_standout ? standout(next_msg) : fputs(next_msg, stdout);
977 msglen = strlen(next_msg);
986 if (clear_eol(msglen) == 1)
992 readline(buffer, size, numeric)
999 register char *ptr = buffer;
1001 register char cnt = 0;
1002 register char maxcnt = 0;
1004 /* allow room for null terminator */
1008 while ((fflush(stdout), read(0, ptr, 1) > 0))
1010 /* newline means we are done */
1011 if ((ch = *ptr) == '\n' || ch == '\r')
1016 /* handle special editing characters */
1019 /* kill line -- account for overstriking */
1025 /* return null string */
1030 else if (ch == ch_erase)
1032 /* erase previous character */
1035 /* none to erase! */
1040 fputs("\b \b", stdout);
1045 /* check for character validity and buffer overflow */
1046 else if (cnt == size || (numeric && !isdigit(ch)) ||
1054 /* echo it and store it in the buffer */
1065 /* all done -- null terminate the string */
1068 /* account for the extra characters in the message area */
1069 /* (if terminal overstrikes, remember the furthest they went) */
1070 msglen += overstrike ? maxcnt : cnt;
1072 /* return either inputted number or string length */
1074 return(cnt == 0 ? -1 : numeric ? atoi(buffer) : cnt);
1077 /* internal support routines */
1079 static int string_count(pp)
1087 while (*pp++ != NULL)
1094 static void summary_format(str, numbers, names)
1098 register char **names;
1103 register char *thisname;
1104 register int useM = No;
1106 /* format each number followed by its string */
1108 while ((thisname = *names++) != NULL)
1110 /* get the number to format */
1113 /* display only non-zero numbers */
1116 /* is this number in kilobytes? */
1117 if (thisname[0] == 'K')
1119 /* yes: format it as a memory value */
1120 p = strecpy(p, format_k(num));
1122 /* skip over the K, since it was included by format_k */
1123 p = strecpy(p, thisname+1);
1127 p = strecpy(p, itoa(num));
1128 p = strecpy(p, thisname);
1132 /* ignore negative numbers, but display corresponding string */
1135 p = strecpy(p, thisname);
1139 /* if the last two characters in the string are ", ", delete them */
1141 if (p >= str && p[0] == ',' && p[1] == ' ')
1147 static void line_update(old, new, start, line)
1157 register int newcol = start + 1;
1158 register int lastcol = start;
1159 char cursor_on_line = No;
1162 /* compare the two strings and only rewrite what has changed */
1165 fprintf(debug, "line_update, starting at %d\n", start);
1169 fputs("\n-\n", debug);
1172 /* start things off on the right foot */
1173 /* this is to make sure the invariants get set up right */
1174 if ((ch = *new++) != *old)
1176 if (line - lastline == 1 && start == 0)
1182 Move_to(start, line);
1184 cursor_on_line = Yes;
1192 * main loop -- check each character. If the old and new aren't the
1193 * same, then update the display. When the distance from the
1194 * current cursor position to the new change is small enough,
1195 * the characters that belong there are written to move the
1199 * lastcol is the column where the cursor currently is sitting
1200 * (always one beyond the end of the last mismatch).
1202 do /* yes, a do...while */
1204 if ((ch = *new++) != *old)
1206 /* new character is different from old */
1207 /* make sure the cursor is on top of this character */
1208 diff = newcol - lastcol;
1211 /* some motion is required--figure out which is shorter */
1212 if (diff < 6 && cursor_on_line)
1214 /* overwrite old stuff--get it out of the old buffer */
1215 printf("%.*s", diff, ¤t[lastcol-start]);
1219 /* use cursor addressing */
1220 Move_to(newcol, line);
1221 cursor_on_line = Yes;
1223 /* remember where the cursor is */
1224 lastcol = newcol + 1;
1228 /* already there, update position */
1232 /* write what we need to */
1235 /* at the end--terminate with a clear-to-end-of-line */
1236 (void) clear_eol(strlen(old));
1240 /* write the new character */
1243 /* put the new character in the screen buffer */
1247 /* update working column and screen buffer pointer */
1251 } while (ch != '\0');
1253 /* zero out the rest of the line buffer -- MUST BE DONE! */
1254 diff = display_width - newcol;
1260 /* remember where the current line is */
1268 * printable(str) - make the string pointed to by "str" into one that is
1269 * printable (i.e.: all ascii), by converting all non-printable
1270 * characters into '?'. Replacements are done in place and a pointer
1271 * to the original buffer is returned.
1274 char *printable(str)
1283 while ((ch = *ptr) != '\0')
1301 int days, hrs, mins, secs;
1303 if (bt->tv_sec != -1) {
1304 uptime = *tod - bt->tv_sec;
1305 days = uptime / 86400;
1307 hrs = uptime / 3600;
1313 * Display the uptime.
1318 Move_to((screen_width - 24) - (days > 9 ? 1 : 0), 0);
1324 printf(" up %d+%02d:%02d:%02d", days, hrs, mins, secs);