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1.2 ! downsj 1: /* $OpenBSD: top.c,v 1.1 1997/08/14 14:00:26 downsj Exp $ */
1.1 downsj 2:
1.2 ! downsj 3: const char copyright[] = "Copyright (c) 1984 through 1996, William LeFebvre";
1.1 downsj 4:
5: /*
6: * Top users/processes display for Unix
7: * Version 3
8: *
9: * This program may be freely redistributed,
10: * but this entire comment MUST remain intact.
11: *
12: * Copyright (c) 1984, 1989, William LeFebvre, Rice University
13: * Copyright (c) 1989, 1990, 1992, William LeFebvre, Northwestern University
14: */
15:
16: /*
17: * See the file "Changes" for information on version-to-version changes.
18: */
19:
20: /*
21: * This file contains "main" and other high-level routines.
22: */
23:
24: /*
25: * The following preprocessor variables, when defined, are used to
26: * distinguish between different Unix implementations:
27: *
28: * SIGHOLD - use SVR4 sighold function when defined
29: * SIGRELSE - use SVR4 sigrelse function when defined
30: * FD_SET - macros FD_SET and FD_ZERO are used when defined
31: */
32:
1.2 ! downsj 33: #include <sys/types.h>
! 34: #include <stdio.h>
! 35: #include <ctype.h>
1.1 downsj 36: #include <signal.h>
37: #include <setjmp.h>
1.2 ! downsj 38: #include <string.h>
! 39: #include <stdlib.h>
! 40: #include <unistd.h>
1.1 downsj 41: #include <sys/time.h>
42:
43: /* includes specific to top */
44: #include "display.h" /* interface to display package */
45: #include "screen.h" /* interface to screen package */
46: #include "top.h"
47: #include "top.local.h"
48: #include "boolean.h"
49: #include "machine.h"
50: #include "utils.h"
51:
52: /* Size of the stdio buffer given to stdout */
53: #define Buffersize 2048
54:
55: /* The buffer that stdio will use */
56: char stdoutbuf[Buffersize];
57:
58: /* build Signal masks */
59: #define Smask(s) (1 << ((s) - 1))
60:
61: /* imported from screen.c */
62: extern int overstrike;
63:
64: /* signal handling routines */
1.2 ! downsj 65: static void leave __P((int));
! 66: static void onalrm __P((int));
! 67: static void tstop __P((int));
1.1 downsj 68: #ifdef SIGWINCH
1.2 ! downsj 69: static void winch __P((int));
1.1 downsj 70: #endif
71:
1.2 ! downsj 72: static void reset_display __P((void));
1.1 downsj 73:
74: /* values which need to be accessed by signal handlers */
75: static int max_topn; /* maximum displayable processes */
76:
77: /* miscellaneous things */
78: char *myname = "top";
79: jmp_buf jmp_int;
80:
81: /* routines that don't return int */
82:
83: #ifdef ORDER
84: extern int (*proc_compares[])();
85: #else
86: extern int proc_compare();
87: #endif
88: time_t time();
89:
90: caddr_t get_process_info();
91:
92: /* pointers to display routines */
1.2 ! downsj 93: void (*d_loadave)() = i_loadave;
! 94: void (*d_procstates)() = i_procstates;
! 95: void (*d_cpustates)() = i_cpustates;
! 96: void (*d_memory)() = i_memory;
! 97: void (*d_message)() = i_message;
! 98: void (*d_header)() = i_header;
! 99: void (*d_process)() = i_process;
1.1 downsj 100:
101:
1.2 ! downsj 102: int main(argc, argv)
1.1 downsj 103:
104: int argc;
105: char *argv[];
106:
107: {
108: register int i;
109: register int active_procs;
110: register int change;
111:
112: struct system_info system_info;
113: struct statics statics;
114: caddr_t processes;
115:
116: static char tempbuf1[50];
117: static char tempbuf2[50];
118: int old_sigmask; /* only used for BSD-style signals */
119: int topn = Default_TOPN;
120: int delay = Default_DELAY;
121: int displays = 0; /* indicates unspecified */
122: time_t curr_time;
123: char *(*get_userid)() = username;
124: char *uname_field = "USERNAME";
125: char *header_text;
126: char *env_top;
127: char **preset_argv;
128: int preset_argc = 0;
129: char **av;
130: int ac;
131: char dostates = No;
132: char do_unames = Yes;
133: char interactive = Maybe;
134: char warnings = 0;
135: #if Default_TOPN == Infinity
136: char topn_specified = No;
137: #endif
138: char ch;
139: char *iptr;
140: char no_command = 1;
141: struct timeval timeout;
142: struct process_select ps;
143: #ifdef ORDER
144: char *order_name = NULL;
145: int order_index = 0;
146: #endif
147: #ifndef FD_SET
148: /* FD_SET and friends are not present: fake it */
149: typedef int fd_set;
150: #define FD_ZERO(x) (*(x) = 0)
151: #define FD_SET(f, x) (*(x) = f)
152: #endif
153: fd_set readfds;
154:
155: #ifdef ORDER
156: static char command_chars[] = "\f qh?en#sdkriIuo";
157: #else
158: static char command_chars[] = "\f qh?en#sdkriIu";
159: #endif
160: /* these defines enumerate the "strchr"s of the commands in command_chars */
161: #define CMD_redraw 0
162: #define CMD_update 1
163: #define CMD_quit 2
164: #define CMD_help1 3
165: #define CMD_help2 4
166: #define CMD_OSLIMIT 4 /* terminals with OS can only handle commands */
167: #define CMD_errors 5 /* less than or equal to CMD_OSLIMIT */
168: #define CMD_number1 6
169: #define CMD_number2 7
170: #define CMD_delay 8
171: #define CMD_displays 9
172: #define CMD_kill 10
173: #define CMD_renice 11
174: #define CMD_idletog 12
175: #define CMD_idletog2 13
176: #define CMD_user 14
177: #ifdef ORDER
178: #define CMD_order 15
179: #endif
180:
181: /* set the buffer for stdout */
182: #ifdef DEBUG
183: setbuffer(stdout, NULL, 0);
184: #else
185: setbuffer(stdout, stdoutbuf, Buffersize);
186: #endif
187:
188: /* get our name */
189: if (argc > 0)
190: {
191: if ((myname = strrchr(argv[0], '/')) == 0)
192: {
193: myname = argv[0];
194: }
195: else
196: {
197: myname++;
198: }
199: }
200:
201: /* initialize some selection options */
202: ps.idle = Yes;
203: ps.system = No;
204: ps.uid = -1;
205: ps.command = NULL;
206:
207: /* get preset options from the environment */
208: if ((env_top = getenv("TOP")) != NULL)
209: {
210: av = preset_argv = argparse(env_top, &preset_argc);
211: ac = preset_argc;
212:
213: /* set the dummy argument to an explanatory message, in case
214: getopt encounters a bad argument */
215: preset_argv[0] = "while processing environment";
216: }
217:
218: /* process options */
219: do {
220: /* if we're done doing the presets, then process the real arguments */
221: if (preset_argc == 0)
222: {
223: ac = argc;
224: av = argv;
225:
226: /* this should keep getopt happy... */
227: optind = 1;
228: }
229:
230: while ((i = getopt(ac, av, "SIbinqus:d:U:o:")) != EOF)
231: {
232: switch(i)
233: {
234: case 'u': /* toggle uid/username display */
235: do_unames = !do_unames;
236: break;
237:
238: case 'U': /* display only username's processes */
239: if ((ps.uid = userid(optarg)) == -1)
240: {
241: fprintf(stderr, "%s: unknown user\n", optarg);
242: exit(1);
243: }
244: break;
245:
246: case 'S': /* show system processes */
247: ps.system = !ps.system;
248: break;
249:
250: case 'I': /* show idle processes */
251: ps.idle = !ps.idle;
252: break;
253:
254: case 'i': /* go interactive regardless */
255: interactive = Yes;
256: break;
257:
258: case 'n': /* batch, or non-interactive */
259: case 'b':
260: interactive = No;
261: break;
262:
263: case 'd': /* number of displays to show */
264: if ((i = atoiwi(optarg)) == Invalid || i == 0)
265: {
266: fprintf(stderr,
267: "%s: warning: display count should be positive -- option ignored\n",
268: myname);
269: warnings++;
270: }
271: else
272: {
273: displays = i;
274: }
275: break;
276:
277: case 's':
278: if ((delay = atoi(optarg)) < 0)
279: {
280: fprintf(stderr,
281: "%s: warning: seconds delay should be non-negative -- using default\n",
282: myname);
283: delay = Default_DELAY;
284: warnings++;
285: }
286: break;
287:
288: case 'q': /* be quick about it */
289: /* only allow this if user is really root */
290: if (getuid() == 0)
291: {
292: /* be very un-nice! */
293: (void) nice(-20);
294: }
295: else
296: {
297: fprintf(stderr,
298: "%s: warning: `-q' option can only be used by root\n",
299: myname);
300: warnings++;
301: }
302: break;
303:
304: case 'o': /* select sort order */
305: #ifdef ORDER
306: order_name = optarg;
307: #else
308: fprintf(stderr,
309: "%s: this platform does not support arbitrary ordering. Sorry.\n",
310: myname);
311: warnings++;
312: #endif
313: break;
314:
315: default:
316: fprintf(stderr, "\
317: Top version %s\n\
318: Usage: %s [-ISbinqu] [-d x] [-s x] [-o field] [-U username] [number]\n",
319: version_string(), myname);
320: exit(1);
321: }
322: }
323:
324: /* get count of top processes to display (if any) */
325: if (optind < ac)
326: {
327: if ((topn = atoiwi(av[optind])) == Invalid)
328: {
329: fprintf(stderr,
330: "%s: warning: process display count should be non-negative -- using default\n",
331: myname);
332: warnings++;
333: }
334: #if Default_TOPN == Infinity
335: else
336: {
337: topn_specified = Yes;
338: }
339: #endif
340: }
341:
342: /* tricky: remember old value of preset_argc & set preset_argc = 0 */
343: i = preset_argc;
344: preset_argc = 0;
345:
346: /* repeat only if we really did the preset arguments */
347: } while (i != 0);
348:
349: /* set constants for username/uid display correctly */
350: if (!do_unames)
351: {
352: uname_field = " UID ";
353: get_userid = itoa7;
354: }
355:
356: /* initialize the kernel memory interface */
357: if (machine_init(&statics) == -1)
358: {
359: exit(1);
360: }
361:
362: #ifdef ORDER
363: /* determine sorting order index, if necessary */
364: if (order_name != NULL)
365: {
366: if ((order_index = string_index(order_name, statics.order_names)) == -1)
367: {
368: char **pp;
369:
370: fprintf(stderr, "%s: '%s' is not a recognized sorting order.\n",
371: myname, order_name);
372: fprintf(stderr, "\tTry one of these:");
373: pp = statics.order_names;
374: while (*pp != NULL)
375: {
376: fprintf(stderr, " %s", *pp++);
377: }
378: fputc('\n', stderr);
379: exit(1);
380: }
381: }
382: #endif
383:
384: #ifdef no_initialization_needed
385: /* initialize the hashing stuff */
386: if (do_unames)
387: {
388: init_hash();
389: }
390: #endif
391:
392: /* initialize termcap */
393: init_termcap(interactive);
394:
395: /* get the string to use for the process area header */
396: header_text = format_header(uname_field);
397:
398: /* initialize display interface */
399: if ((max_topn = display_init(&statics)) == -1)
400: {
401: fprintf(stderr, "%s: can't allocate sufficient memory\n", myname);
402: exit(4);
403: }
404:
405: /* print warning if user requested more processes than we can display */
406: if (topn > max_topn)
407: {
408: fprintf(stderr,
409: "%s: warning: this terminal can only display %d processes.\n",
410: myname, max_topn);
411: warnings++;
412: }
413:
414: /* adjust for topn == Infinity */
415: if (topn == Infinity)
416: {
417: /*
418: * For smart terminals, infinity really means everything that can
419: * be displayed, or Largest.
420: * On dumb terminals, infinity means every process in the system!
421: * We only really want to do that if it was explicitly specified.
422: * This is always the case when "Default_TOPN != Infinity". But if
423: * topn wasn't explicitly specified and we are on a dumb terminal
424: * and the default is Infinity, then (and only then) we use
425: * "Nominal_TOPN" instead.
426: */
427: #if Default_TOPN == Infinity
428: topn = smart_terminal ? Largest :
429: (topn_specified ? Largest : Nominal_TOPN);
430: #else
431: topn = Largest;
432: #endif
433: }
434:
435: /* set header display accordingly */
436: display_header(topn > 0);
437:
438: /* determine interactive state */
439: if (interactive == Maybe)
440: {
441: interactive = smart_terminal;
442: }
443:
444: /* if # of displays not specified, fill it in */
445: if (displays == 0)
446: {
447: displays = smart_terminal ? Infinity : 1;
448: }
449:
450: /* hold interrupt signals while setting up the screen and the handlers */
451: #ifdef SIGHOLD
452: sighold(SIGINT);
453: sighold(SIGQUIT);
454: sighold(SIGTSTP);
455: #else
456: old_sigmask = sigblock(Smask(SIGINT) | Smask(SIGQUIT) | Smask(SIGTSTP));
457: #endif
458: init_screen();
459: (void) signal(SIGINT, leave);
460: (void) signal(SIGQUIT, leave);
461: (void) signal(SIGTSTP, tstop);
462: #ifdef SIGWINCH
463: (void) signal(SIGWINCH, winch);
464: #endif
465: #ifdef SIGRELSE
466: sigrelse(SIGINT);
467: sigrelse(SIGQUIT);
468: sigrelse(SIGTSTP);
469: #else
470: (void) sigsetmask(old_sigmask);
471: #endif
472: if (warnings)
473: {
474: fputs("....", stderr);
475: fflush(stderr); /* why must I do this? */
476: sleep((unsigned)(3 * warnings));
477: fputc('\n', stderr);
478: }
479:
480: /* setup the jump buffer for stops */
481: if (setjmp(jmp_int) != 0)
482: {
483: /* control ends up here after an interrupt */
484: reset_display();
485: }
486:
487: /*
488: * main loop -- repeat while display count is positive or while it
489: * indicates infinity (by being -1)
490: */
491:
492: while ((displays == -1) || (displays-- > 0))
493: {
494: /* get the current stats */
495: get_system_info(&system_info);
496:
497: /* get the current set of processes */
498: processes =
499: get_process_info(&system_info,
500: &ps,
501: #ifdef ORDER
502: proc_compares[order_index]);
503: #else
504: proc_compare);
505: #endif
506:
507: /* display the load averages */
508: (*d_loadave)(system_info.last_pid,
509: system_info.load_avg);
510:
511: /* display the current time */
512: /* this method of getting the time SHOULD be fairly portable */
513: time(&curr_time);
514: i_timeofday(&curr_time);
515:
516: /* display process state breakdown */
517: (*d_procstates)(system_info.p_total,
518: system_info.procstates);
519:
520: /* display the cpu state percentage breakdown */
521: if (dostates) /* but not the first time */
522: {
523: (*d_cpustates)(system_info.cpustates);
524: }
525: else
526: {
527: /* we'll do it next time */
528: if (smart_terminal)
529: {
530: z_cpustates();
531: }
532: else
533: {
534: putchar('\n');
535: }
536: dostates = Yes;
537: }
538:
539: /* display memory stats */
540: (*d_memory)(system_info.memory);
541:
542: /* handle message area */
543: (*d_message)();
544:
545: /* update the header area */
546: (*d_header)(header_text);
547:
548: if (topn > 0)
549: {
550: /* determine number of processes to actually display */
551: /* this number will be the smallest of: active processes,
552: number user requested, number current screen accomodates */
553: active_procs = system_info.p_active;
554: if (active_procs > topn)
555: {
556: active_procs = topn;
557: }
558: if (active_procs > max_topn)
559: {
560: active_procs = max_topn;
561: }
562:
563: /* now show the top "n" processes. */
564: for (i = 0; i < active_procs; i++)
565: {
566: (*d_process)(i, format_next_process(processes, get_userid));
567: }
568: }
569: else
570: {
571: i = 0;
572: }
573:
574: /* do end-screen processing */
575: u_endscreen(i);
576:
577: /* now, flush the output buffer */
578: fflush(stdout);
579:
580: /* only do the rest if we have more displays to show */
581: if (displays)
582: {
583: /* switch out for new display on smart terminals */
584: if (smart_terminal)
585: {
586: if (overstrike)
587: {
588: reset_display();
589: }
590: else
591: {
592: d_loadave = u_loadave;
593: d_procstates = u_procstates;
594: d_cpustates = u_cpustates;
595: d_memory = u_memory;
596: d_message = u_message;
597: d_header = u_header;
598: d_process = u_process;
599: }
600: }
601:
602: no_command = Yes;
603: if (!interactive)
604: {
605: /* set up alarm */
606: (void) signal(SIGALRM, onalrm);
607: (void) alarm((unsigned)delay);
608:
609: /* wait for the rest of it .... */
610: pause();
611: }
612: else while (no_command)
613: {
614: /* assume valid command unless told otherwise */
615: no_command = No;
616:
617: /* set up arguments for select with timeout */
618: FD_ZERO(&readfds);
619: FD_SET(1, &readfds); /* for standard input */
620: timeout.tv_sec = delay;
621: timeout.tv_usec = 0;
622:
623: /* wait for either input or the end of the delay period */
624: if (select(32, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timeout) > 0)
625: {
626: int newval;
627: char *errmsg;
628:
629: /* something to read -- clear the message area first */
630: clear_message();
631:
632: /* now read it and convert to command strchr */
633: /* (use "change" as a temporary to hold strchr) */
634: (void) read(0, &ch, 1);
635: if ((iptr = strchr(command_chars, ch)) == NULL)
636: {
637: /* illegal command */
638: new_message(MT_standout, " Command not understood");
639: putchar('\r');
640: no_command = Yes;
641: }
642: else
643: {
644: change = iptr - command_chars;
645: if (overstrike && change > CMD_OSLIMIT)
646: {
647: /* error */
648: new_message(MT_standout,
649: " Command cannot be handled by this terminal");
650: putchar('\r');
651: no_command = Yes;
652: }
653: else switch(change)
654: {
655: case CMD_redraw: /* redraw screen */
656: reset_display();
657: break;
658:
659: case CMD_update: /* merely update display */
660: /* is the load average high? */
661: if (system_info.load_avg[0] > LoadMax)
662: {
663: /* yes, go home for visual feedback */
664: go_home();
665: fflush(stdout);
666: }
667: break;
668:
669: case CMD_quit: /* quit */
670: quit(0);
671: /*NOTREACHED*/
672: break;
673:
674: case CMD_help1: /* help */
675: case CMD_help2:
676: reset_display();
677: clear();
678: show_help();
679: standout("Hit any key to continue: ");
680: fflush(stdout);
681: (void) read(0, &ch, 1);
682: break;
683:
684: case CMD_errors: /* show errors */
685: if (error_count() == 0)
686: {
687: new_message(MT_standout,
688: " Currently no errors to report.");
689: putchar('\r');
690: no_command = Yes;
691: }
692: else
693: {
694: reset_display();
695: clear();
696: show_errors();
697: standout("Hit any key to continue: ");
698: fflush(stdout);
699: (void) read(0, &ch, 1);
700: }
701: break;
702:
703: case CMD_number1: /* new number */
704: case CMD_number2:
705: new_message(MT_standout,
706: "Number of processes to show: ");
707: newval = readline(tempbuf1, 8, Yes);
708: if (newval > -1)
709: {
710: if (newval > max_topn)
711: {
712: new_message(MT_standout | MT_delayed,
713: " This terminal can only display %d processes.",
714: max_topn);
715: putchar('\r');
716: }
717:
718: if (newval == 0)
719: {
720: /* inhibit the header */
721: display_header(No);
722: }
723: else if (newval > topn && topn == 0)
724: {
725: /* redraw the header */
726: display_header(Yes);
727: d_header = i_header;
728: }
729: topn = newval;
730: }
731: break;
732:
733: case CMD_delay: /* new seconds delay */
734: new_message(MT_standout, "Seconds to delay: ");
735: if ((i = readline(tempbuf1, 8, Yes)) > -1)
736: {
737: delay = i;
738: }
739: clear_message();
740: break;
741:
742: case CMD_displays: /* change display count */
743: new_message(MT_standout,
744: "Displays to show (currently %s): ",
745: displays == -1 ? "infinite" :
746: itoa(displays));
747: if ((i = readline(tempbuf1, 10, Yes)) > 0)
748: {
749: displays = i;
750: }
751: else if (i == 0)
752: {
753: quit(0);
754: }
755: clear_message();
756: break;
757:
758: case CMD_kill: /* kill program */
759: new_message(0, "kill ");
760: if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
761: {
762: if ((errmsg = kill_procs(tempbuf2)) != NULL)
763: {
764: new_message(MT_standout, errmsg);
765: putchar('\r');
766: no_command = Yes;
767: }
768: }
769: else
770: {
771: clear_message();
772: }
773: break;
774:
775: case CMD_renice: /* renice program */
776: new_message(0, "renice ");
777: if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
778: {
779: if ((errmsg = renice_procs(tempbuf2)) != NULL)
780: {
781: new_message(MT_standout, errmsg);
782: putchar('\r');
783: no_command = Yes;
784: }
785: }
786: else
787: {
788: clear_message();
789: }
790: break;
791:
792: case CMD_idletog:
793: case CMD_idletog2:
794: ps.idle = !ps.idle;
795: new_message(MT_standout | MT_delayed,
796: " %sisplaying idle processes.",
797: ps.idle ? "D" : "Not d");
798: putchar('\r');
799: break;
800:
801: case CMD_user:
802: new_message(MT_standout,
803: "Username to show: ");
804: if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
805: {
806: if (tempbuf2[0] == '+' &&
807: tempbuf2[1] == '\0')
808: {
809: ps.uid = -1;
810: }
811: else if ((i = userid(tempbuf2)) == -1)
812: {
813: new_message(MT_standout,
814: " %s: unknown user", tempbuf2);
815: no_command = Yes;
816: }
817: else
818: {
819: ps.uid = i;
820: }
821: putchar('\r');
822: }
823: else
824: {
825: clear_message();
826: }
827: break;
828:
829: #ifdef ORDER
830: case CMD_order:
831: new_message(MT_standout,
832: "Order to sort: ");
833: if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
834: {
835: if ((i = string_index(tempbuf2, statics.order_names)) == -1)
836: {
837: new_message(MT_standout,
838: " %s: unrecognized sorting order", tempbuf2);
839: no_command = Yes;
840: }
841: else
842: {
843: order_index = i;
844: }
845: putchar('\r');
846: }
847: else
848: {
849: clear_message();
850: }
851: break;
852: #endif
853:
854: default:
855: new_message(MT_standout, " BAD CASE IN SWITCH!");
856: putchar('\r');
857: }
858: }
859:
860: /* flush out stuff that may have been written */
861: fflush(stdout);
862: }
863: }
864: }
865: }
866:
867: quit(0);
868: /*NOTREACHED*/
869: }
870:
871: /*
872: * reset_display() - reset all the display routine pointers so that entire
873: * screen will get redrawn.
874: */
875:
1.2 ! downsj 876: static void reset_display()
1.1 downsj 877:
878: {
879: d_loadave = i_loadave;
880: d_procstates = i_procstates;
881: d_cpustates = i_cpustates;
882: d_memory = i_memory;
883: d_message = i_message;
884: d_header = i_header;
885: d_process = i_process;
886: }
887:
888: /*
889: * signal handlers
890: */
891:
1.2 ! downsj 892: void leave(unused) /* exit under normal conditions -- INT handler */
! 893:
! 894: int unused;
1.1 downsj 895:
896: {
897: end_screen();
898: exit(0);
899: }
900:
1.2 ! downsj 901: void tstop(i) /* SIGTSTP handler */
1.1 downsj 902:
903: int i;
904:
905: {
906: /* move to the lower left */
907: end_screen();
908: fflush(stdout);
909:
910: /* default the signal handler action */
911: (void) signal(SIGTSTP, SIG_DFL);
912:
913: /* unblock the signal and send ourselves one */
914: #ifdef SIGRELSE
915: sigrelse(SIGTSTP);
916: #else
917: (void) sigsetmask(sigblock(0) & ~(1 << (SIGTSTP - 1)));
918: #endif
919: (void) kill(0, SIGTSTP);
920:
921: /* reset the signal handler */
922: (void) signal(SIGTSTP, tstop);
923:
924: /* reinit screen */
925: reinit_screen();
926:
927: /* jump to appropriate place */
928: longjmp(jmp_int, 1);
929:
930: /*NOTREACHED*/
931: }
932:
933: #ifdef SIGWINCH
1.2 ! downsj 934: void winch(i) /* SIGWINCH handler */
1.1 downsj 935:
936: int i;
937:
938: {
939: /* reascertain the screen dimensions */
940: get_screensize();
941:
942: /* tell display to resize */
943: max_topn = display_resize();
944:
945: /* reset the signal handler */
946: (void) signal(SIGWINCH, winch);
947:
948: /* jump to appropriate place */
949: longjmp(jmp_int, 1);
950: }
951: #endif
952:
953: void quit(status) /* exit under duress */
954:
955: int status;
956:
957: {
958: end_screen();
959: exit(status);
960: /*NOTREACHED*/
961: }
962:
1.2 ! downsj 963: void onalrm(unused) /* SIGALRM handler */
! 964:
! 965: int unused;
1.1 downsj 966:
967: {
968: /* this is only used in batch mode to break out of the pause() */
969: /* return; */
970: }
971: