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authorEdwin Groothuis <edwin@FreeBSD.org>2008-09-28 10:13:11 +0000
committerEdwin Groothuis <edwin@FreeBSD.org>2008-09-28 10:13:11 +0000
commitc1dc0a1745ca8959fc4ce61ce026e2a83984c13e (patch)
tree786fa1fbb17c69aa06408624ed3ee94be63be396 /top.c
parent3e0c556084482bdb8cc32d03a1b57ecd45eb8947 (diff)
downloadsrc-c1dc0a1745ca8959fc4ce61ce026e2a83984c13e.tar.gz
src-c1dc0a1745ca8959fc4ce61ce026e2a83984c13e.zip
Flatten the dist tree.
Notes
Notes: svn path=/vendor/top/dist/; revision=183432
Diffstat (limited to 'top.c')
-rw-r--r--top.c1022
1 files changed, 1022 insertions, 0 deletions
diff --git a/top.c b/top.c
new file mode 100644
index 000000000000..aa119ea00efc
--- /dev/null
+++ b/top.c
@@ -0,0 +1,1022 @@
+char *copyright =
+ "Copyright (c) 1984 through 1996, William LeFebvre";
+
+/*
+ * Top users/processes display for Unix
+ * Version 3
+ *
+ * This program may be freely redistributed,
+ * but this entire comment MUST remain intact.
+ *
+ * Copyright (c) 1984, 1989, William LeFebvre, Rice University
+ * Copyright (c) 1989 - 1994, William LeFebvre, Northwestern University
+ * Copyright (c) 1994, 1995, William LeFebvre, Argonne National Laboratory
+ * Copyright (c) 1996, William LeFebvre, Group sys Consulting
+ */
+
+/*
+ * See the file "Changes" for information on version-to-version changes.
+ */
+
+/*
+ * This file contains "main" and other high-level routines.
+ */
+
+/*
+ * The following preprocessor variables, when defined, are used to
+ * distinguish between different Unix implementations:
+ *
+ * SIGHOLD - use SVR4 sighold function when defined
+ * SIGRELSE - use SVR4 sigrelse function when defined
+ * FD_SET - macros FD_SET and FD_ZERO are used when defined
+ */
+
+#include "os.h"
+#include <signal.h>
+#include <setjmp.h>
+#include <ctype.h>
+#include <sys/time.h>
+
+/* includes specific to top */
+#include "display.h" /* interface to display package */
+#include "screen.h" /* interface to screen package */
+#include "top.h"
+#include "top.local.h"
+#include "boolean.h"
+#include "machine.h"
+#include "utils.h"
+
+/* Size of the stdio buffer given to stdout */
+#define Buffersize 2048
+
+/* The buffer that stdio will use */
+char stdoutbuf[Buffersize];
+
+/* build Signal masks */
+#define Smask(s) (1 << ((s) - 1))
+
+/* for getopt: */
+extern int optind;
+extern char *optarg;
+
+/* imported from screen.c */
+extern int overstrike;
+
+/* signal handling routines */
+sigret_t leave();
+sigret_t onalrm();
+sigret_t tstop();
+#ifdef SIGWINCH
+sigret_t winch();
+#endif
+
+/* internal routines */
+void quit();
+
+/* values which need to be accessed by signal handlers */
+static int max_topn; /* maximum displayable processes */
+
+/* miscellaneous things */
+char *myname = "top";
+jmp_buf jmp_int;
+
+/* routines that don't return int */
+
+char *username();
+char *ctime();
+char *kill_procs();
+char *renice_procs();
+
+#ifdef ORDER
+extern int (*proc_compares[])();
+#else
+extern int proc_compare();
+#endif
+time_t time();
+
+caddr_t get_process_info();
+
+/* different routines for displaying the user's identification */
+/* (values assigned to get_userid) */
+char *username();
+char *itoa7();
+
+/* display routines that need to be predeclared */
+int i_loadave();
+int u_loadave();
+int i_procstates();
+int u_procstates();
+int i_cpustates();
+int u_cpustates();
+int i_memory();
+int u_memory();
+int i_message();
+int u_message();
+int i_header();
+int u_header();
+int i_process();
+int u_process();
+
+/* pointers to display routines */
+int (*d_loadave)() = i_loadave;
+int (*d_procstates)() = i_procstates;
+int (*d_cpustates)() = i_cpustates;
+int (*d_memory)() = i_memory;
+int (*d_message)() = i_message;
+int (*d_header)() = i_header;
+int (*d_process)() = i_process;
+
+
+main(argc, argv)
+
+int argc;
+char *argv[];
+
+{
+ register int i;
+ register int active_procs;
+ register int change;
+
+ struct system_info system_info;
+ struct statics statics;
+ caddr_t processes;
+
+ static char tempbuf1[50];
+ static char tempbuf2[50];
+ int old_sigmask; /* only used for BSD-style signals */
+ int topn = Default_TOPN;
+ int delay = Default_DELAY;
+ int displays = 0; /* indicates unspecified */
+ time_t curr_time;
+ char *(*get_userid)() = username;
+ char *uname_field = "USERNAME";
+ char *header_text;
+ char *env_top;
+ char **preset_argv;
+ int preset_argc = 0;
+ char **av;
+ int ac;
+ char dostates = No;
+ char do_unames = Yes;
+ char interactive = Maybe;
+ char warnings = 0;
+#if Default_TOPN == Infinity
+ char topn_specified = No;
+#endif
+ char ch;
+ char *iptr;
+ char no_command = 1;
+ struct timeval timeout;
+ struct process_select ps;
+#ifdef ORDER
+ char *order_name = NULL;
+ int order_index = 0;
+#endif
+#ifndef FD_SET
+ /* FD_SET and friends are not present: fake it */
+ typedef int fd_set;
+#define FD_ZERO(x) (*(x) = 0)
+#define FD_SET(f, x) (*(x) = 1<<f)
+#endif
+ fd_set readfds;
+
+#ifdef ORDER
+ static char command_chars[] = "\f qh?en#sdkriIuo";
+#else
+ static char command_chars[] = "\f qh?en#sdkriIu";
+#endif
+/* these defines enumerate the "strchr"s of the commands in command_chars */
+#define CMD_redraw 0
+#define CMD_update 1
+#define CMD_quit 2
+#define CMD_help1 3
+#define CMD_help2 4
+#define CMD_OSLIMIT 4 /* terminals with OS can only handle commands */
+#define CMD_errors 5 /* less than or equal to CMD_OSLIMIT */
+#define CMD_number1 6
+#define CMD_number2 7
+#define CMD_delay 8
+#define CMD_displays 9
+#define CMD_kill 10
+#define CMD_renice 11
+#define CMD_idletog 12
+#define CMD_idletog2 13
+#define CMD_user 14
+#ifdef ORDER
+#define CMD_order 15
+#endif
+
+ /* set the buffer for stdout */
+#ifdef DEBUG
+ extern FILE *debug;
+ debug = fopen("debug.run", "w");
+ setbuffer(stdout, NULL, 0);
+#else
+ setbuffer(stdout, stdoutbuf, Buffersize);
+#endif
+
+ /* get our name */
+ if (argc > 0)
+ {
+ if ((myname = strrchr(argv[0], '/')) == 0)
+ {
+ myname = argv[0];
+ }
+ else
+ {
+ myname++;
+ }
+ }
+
+ /* initialize some selection options */
+ ps.idle = Yes;
+ ps.system = No;
+ ps.uid = -1;
+ ps.command = NULL;
+
+ /* get preset options from the environment */
+ if ((env_top = getenv("TOP")) != NULL)
+ {
+ av = preset_argv = argparse(env_top, &preset_argc);
+ ac = preset_argc;
+
+ /* set the dummy argument to an explanatory message, in case
+ getopt encounters a bad argument */
+ preset_argv[0] = "while processing environment";
+ }
+
+ /* process options */
+ do {
+ /* if we're done doing the presets, then process the real arguments */
+ if (preset_argc == 0)
+ {
+ ac = argc;
+ av = argv;
+
+ /* this should keep getopt happy... */
+ optind = 1;
+ }
+
+ while ((i = getopt(ac, av, "SIbinquvs:d:U:o:")) != EOF)
+ {
+ switch(i)
+ {
+ case 'v': /* show version number */
+ fprintf(stderr, "%s: version %s\n",
+ myname, version_string());
+ exit(1);
+ break;
+
+ case 'u': /* toggle uid/username display */
+ do_unames = !do_unames;
+ break;
+
+ case 'U': /* display only username's processes */
+ if ((ps.uid = userid(optarg)) == -1)
+ {
+ fprintf(stderr, "%s: unknown user\n", optarg);
+ exit(1);
+ }
+ break;
+
+ case 'S': /* show system processes */
+ ps.system = !ps.system;
+ break;
+
+ case 'I': /* show idle processes */
+ ps.idle = !ps.idle;
+ break;
+
+ case 'i': /* go interactive regardless */
+ interactive = Yes;
+ break;
+
+ case 'n': /* batch, or non-interactive */
+ case 'b':
+ interactive = No;
+ break;
+
+ case 'd': /* number of displays to show */
+ if ((i = atoiwi(optarg)) == Invalid || i == 0)
+ {
+ fprintf(stderr,
+ "%s: warning: display count should be positive -- option ignored\n",
+ myname);
+ warnings++;
+ }
+ else
+ {
+ displays = i;
+ }
+ break;
+
+ case 's':
+ if ((delay = atoi(optarg)) < 0 || (delay == 0 && getuid() != 0))
+ {
+ fprintf(stderr,
+ "%s: warning: seconds delay should be positive -- using default\n",
+ myname);
+ delay = Default_DELAY;
+ warnings++;
+ }
+ break;
+
+ case 'q': /* be quick about it */
+ /* only allow this if user is really root */
+ if (getuid() == 0)
+ {
+ /* be very un-nice! */
+ (void) nice(-20);
+ }
+ else
+ {
+ fprintf(stderr,
+ "%s: warning: `-q' option can only be used by root\n",
+ myname);
+ warnings++;
+ }
+ break;
+
+ case 'o': /* select sort order */
+#ifdef ORDER
+ order_name = optarg;
+#else
+ fprintf(stderr,
+ "%s: this platform does not support arbitrary ordering. Sorry.\n",
+ myname);
+ warnings++;
+#endif
+ break;
+
+ default:
+ fprintf(stderr, "\
+Top version %s\n\
+Usage: %s [-ISbinqu] [-d x] [-s x] [-o field] [-U username] [number]\n",
+ version_string(), myname);
+ exit(1);
+ }
+ }
+
+ /* get count of top processes to display (if any) */
+ if (optind < ac)
+ {
+ if ((topn = atoiwi(av[optind])) == Invalid)
+ {
+ fprintf(stderr,
+ "%s: warning: process display count should be non-negative -- using default\n",
+ myname);
+ warnings++;
+ }
+#if Default_TOPN == Infinity
+ else
+ {
+ topn_specified = Yes;
+ }
+#endif
+ }
+
+ /* tricky: remember old value of preset_argc & set preset_argc = 0 */
+ i = preset_argc;
+ preset_argc = 0;
+
+ /* repeat only if we really did the preset arguments */
+ } while (i != 0);
+
+ /* set constants for username/uid display correctly */
+ if (!do_unames)
+ {
+ uname_field = " UID ";
+ get_userid = itoa7;
+ }
+
+ /* initialize the kernel memory interface */
+ if (machine_init(&statics) == -1)
+ {
+ exit(1);
+ }
+
+#ifdef ORDER
+ /* determine sorting order index, if necessary */
+ if (order_name != NULL)
+ {
+ if ((order_index = string_index(order_name, statics.order_names)) == -1)
+ {
+ char **pp;
+
+ fprintf(stderr, "%s: '%s' is not a recognized sorting order.\n",
+ myname, order_name);
+ fprintf(stderr, "\tTry one of these:");
+ pp = statics.order_names;
+ while (*pp != NULL)
+ {
+ fprintf(stderr, " %s", *pp++);
+ }
+ fputc('\n', stderr);
+ exit(1);
+ }
+ }
+#endif
+
+#ifdef no_initialization_needed
+ /* initialize the hashing stuff */
+ if (do_unames)
+ {
+ init_hash();
+ }
+#endif
+
+ /* initialize termcap */
+ init_termcap(interactive);
+
+ /* get the string to use for the process area header */
+ header_text = format_header(uname_field);
+
+ /* initialize display interface */
+ if ((max_topn = display_init(&statics)) == -1)
+ {
+ fprintf(stderr, "%s: can't allocate sufficient memory\n", myname);
+ exit(4);
+ }
+
+ /* print warning if user requested more processes than we can display */
+ if (topn > max_topn)
+ {
+ fprintf(stderr,
+ "%s: warning: this terminal can only display %d processes.\n",
+ myname, max_topn);
+ warnings++;
+ }
+
+ /* adjust for topn == Infinity */
+ if (topn == Infinity)
+ {
+ /*
+ * For smart terminals, infinity really means everything that can
+ * be displayed, or Largest.
+ * On dumb terminals, infinity means every process in the system!
+ * We only really want to do that if it was explicitly specified.
+ * This is always the case when "Default_TOPN != Infinity". But if
+ * topn wasn't explicitly specified and we are on a dumb terminal
+ * and the default is Infinity, then (and only then) we use
+ * "Nominal_TOPN" instead.
+ */
+#if Default_TOPN == Infinity
+ topn = smart_terminal ? Largest :
+ (topn_specified ? Largest : Nominal_TOPN);
+#else
+ topn = Largest;
+#endif
+ }
+
+ /* set header display accordingly */
+ display_header(topn > 0);
+
+ /* determine interactive state */
+ if (interactive == Maybe)
+ {
+ interactive = smart_terminal;
+ }
+
+ /* if # of displays not specified, fill it in */
+ if (displays == 0)
+ {
+ displays = smart_terminal ? Infinity : 1;
+ }
+
+ /* hold interrupt signals while setting up the screen and the handlers */
+#ifdef SIGHOLD
+ sighold(SIGINT);
+ sighold(SIGQUIT);
+ sighold(SIGTSTP);
+#else
+ old_sigmask = sigblock(Smask(SIGINT) | Smask(SIGQUIT) | Smask(SIGTSTP));
+#endif
+ init_screen();
+ (void) signal(SIGINT, leave);
+ (void) signal(SIGQUIT, leave);
+ (void) signal(SIGTSTP, tstop);
+#ifdef SIGWINCH
+ (void) signal(SIGWINCH, winch);
+#endif
+#ifdef SIGRELSE
+ sigrelse(SIGINT);
+ sigrelse(SIGQUIT);
+ sigrelse(SIGTSTP);
+#else
+ (void) sigsetmask(old_sigmask);
+#endif
+ if (warnings)
+ {
+ fputs("....", stderr);
+ fflush(stderr); /* why must I do this? */
+ sleep((unsigned)(3 * warnings));
+ fputc('\n', stderr);
+ }
+
+ /* setup the jump buffer for stops */
+ if (setjmp(jmp_int) != 0)
+ {
+ /* control ends up here after an interrupt */
+ reset_display();
+ }
+
+ /*
+ * main loop -- repeat while display count is positive or while it
+ * indicates infinity (by being -1)
+ */
+
+ while ((displays == -1) || (displays-- > 0))
+ {
+ /* get the current stats */
+ get_system_info(&system_info);
+
+ /* get the current set of processes */
+ processes =
+ get_process_info(&system_info,
+ &ps,
+#ifdef ORDER
+ proc_compares[order_index]);
+#else
+ proc_compare);
+#endif
+
+ /* display the load averages */
+ (*d_loadave)(system_info.last_pid,
+ system_info.load_avg);
+
+ /* display the current time */
+ /* this method of getting the time SHOULD be fairly portable */
+ time(&curr_time);
+ i_timeofday(&curr_time);
+
+ /* display process state breakdown */
+ (*d_procstates)(system_info.p_total,
+ system_info.procstates);
+
+ /* display the cpu state percentage breakdown */
+ if (dostates) /* but not the first time */
+ {
+ (*d_cpustates)(system_info.cpustates);
+ }
+ else
+ {
+ /* we'll do it next time */
+ if (smart_terminal)
+ {
+ z_cpustates();
+ }
+ else
+ {
+ putchar('\n');
+ }
+ dostates = Yes;
+ }
+
+ /* display memory stats */
+ (*d_memory)(system_info.memory);
+
+ /* handle message area */
+ (*d_message)();
+
+ /* update the header area */
+ (*d_header)(header_text);
+
+ if (topn > 0)
+ {
+ /* determine number of processes to actually display */
+ /* this number will be the smallest of: active processes,
+ number user requested, number current screen accomodates */
+ active_procs = system_info.P_ACTIVE;
+ if (active_procs > topn)
+ {
+ active_procs = topn;
+ }
+ if (active_procs > max_topn)
+ {
+ active_procs = max_topn;
+ }
+
+ /* now show the top "n" processes. */
+ for (i = 0; i < active_procs; i++)
+ {
+ (*d_process)(i, format_next_process(processes, get_userid));
+ }
+ }
+ else
+ {
+ i = 0;
+ }
+
+ /* do end-screen processing */
+ u_endscreen(i);
+
+ /* now, flush the output buffer */
+ if (fflush(stdout) != 0)
+ {
+ new_message(MT_standout, " Write error on stdout");
+ putchar('\r');
+ quit(1);
+ /*NOTREACHED*/
+ }
+
+ /* only do the rest if we have more displays to show */
+ if (displays)
+ {
+ /* switch out for new display on smart terminals */
+ if (smart_terminal)
+ {
+ if (overstrike)
+ {
+ reset_display();
+ }
+ else
+ {
+ d_loadave = u_loadave;
+ d_procstates = u_procstates;
+ d_cpustates = u_cpustates;
+ d_memory = u_memory;
+ d_message = u_message;
+ d_header = u_header;
+ d_process = u_process;
+ }
+ }
+
+ no_command = Yes;
+ if (!interactive)
+ {
+ /* set up alarm */
+ (void) signal(SIGALRM, onalrm);
+ (void) alarm((unsigned)delay);
+
+ /* wait for the rest of it .... */
+ pause();
+ }
+ else while (no_command)
+ {
+ /* assume valid command unless told otherwise */
+ no_command = No;
+
+ /* set up arguments for select with timeout */
+ FD_ZERO(&readfds);
+ FD_SET(0, &readfds); /* for standard input */
+ timeout.tv_sec = delay;
+ timeout.tv_usec = 0;
+
+ /* wait for either input or the end of the delay period */
+ if (select(32, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timeout) > 0)
+ {
+ int newval;
+ char *errmsg;
+
+ /* something to read -- clear the message area first */
+ clear_message();
+
+ /* now read it and convert to command strchr */
+ /* (use "change" as a temporary to hold strchr) */
+ if (read(0, &ch, 1) != 1)
+ {
+ /* read error: either 0 or -1 */
+ new_message(MT_standout, " Read error on stdin");
+ putchar('\r');
+ quit(1);
+ /*NOTREACHED*/
+ }
+ if ((iptr = strchr(command_chars, ch)) == NULL)
+ {
+ /* illegal command */
+ new_message(MT_standout, " Command not understood");
+ putchar('\r');
+ no_command = Yes;
+ }
+ else
+ {
+ change = iptr - command_chars;
+ if (overstrike && change > CMD_OSLIMIT)
+ {
+ /* error */
+ new_message(MT_standout,
+ " Command cannot be handled by this terminal");
+ putchar('\r');
+ no_command = Yes;
+ }
+ else switch(change)
+ {
+ case CMD_redraw: /* redraw screen */
+ reset_display();
+ break;
+
+ case CMD_update: /* merely update display */
+ /* is the load average high? */
+ if (system_info.load_avg[0] > LoadMax)
+ {
+ /* yes, go home for visual feedback */
+ go_home();
+ fflush(stdout);
+ }
+ break;
+
+ case CMD_quit: /* quit */
+ quit(0);
+ /*NOTREACHED*/
+ break;
+
+ case CMD_help1: /* help */
+ case CMD_help2:
+ reset_display();
+ clear();
+ show_help();
+ standout("Hit any key to continue: ");
+ fflush(stdout);
+ (void) read(0, &ch, 1);
+ break;
+
+ case CMD_errors: /* show errors */
+ if (error_count() == 0)
+ {
+ new_message(MT_standout,
+ " Currently no errors to report.");
+ putchar('\r');
+ no_command = Yes;
+ }
+ else
+ {
+ reset_display();
+ clear();
+ show_errors();
+ standout("Hit any key to continue: ");
+ fflush(stdout);
+ (void) read(0, &ch, 1);
+ }
+ break;
+
+ case CMD_number1: /* new number */
+ case CMD_number2:
+ new_message(MT_standout,
+ "Number of processes to show: ");
+ newval = readline(tempbuf1, 8, Yes);
+ if (newval > -1)
+ {
+ if (newval > max_topn)
+ {
+ new_message(MT_standout | MT_delayed,
+ " This terminal can only display %d processes.",
+ max_topn);
+ putchar('\r');
+ }
+
+ if (newval == 0)
+ {
+ /* inhibit the header */
+ display_header(No);
+ }
+ else if (newval > topn && topn == 0)
+ {
+ /* redraw the header */
+ display_header(Yes);
+ d_header = i_header;
+ }
+ topn = newval;
+ }
+ break;
+
+ case CMD_delay: /* new seconds delay */
+ new_message(MT_standout, "Seconds to delay: ");
+ if ((i = readline(tempbuf1, 8, Yes)) > -1)
+ {
+ if ((delay = i) == 0 && getuid() != 0)
+ {
+ delay = 1;
+ }
+ }
+ clear_message();
+ break;
+
+ case CMD_displays: /* change display count */
+ new_message(MT_standout,
+ "Displays to show (currently %s): ",
+ displays == -1 ? "infinite" :
+ itoa(displays));
+ if ((i = readline(tempbuf1, 10, Yes)) > 0)
+ {
+ displays = i;
+ }
+ else if (i == 0)
+ {
+ quit(0);
+ }
+ clear_message();
+ break;
+
+ case CMD_kill: /* kill program */
+ new_message(0, "kill ");
+ if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
+ {
+ if ((errmsg = kill_procs(tempbuf2)) != NULL)
+ {
+ new_message(MT_standout, errmsg);
+ putchar('\r');
+ no_command = Yes;
+ }
+ }
+ else
+ {
+ clear_message();
+ }
+ break;
+
+ case CMD_renice: /* renice program */
+ new_message(0, "renice ");
+ if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
+ {
+ if ((errmsg = renice_procs(tempbuf2)) != NULL)
+ {
+ new_message(MT_standout, errmsg);
+ putchar('\r');
+ no_command = Yes;
+ }
+ }
+ else
+ {
+ clear_message();
+ }
+ break;
+
+ case CMD_idletog:
+ case CMD_idletog2:
+ ps.idle = !ps.idle;
+ new_message(MT_standout | MT_delayed,
+ " %sisplaying idle processes.",
+ ps.idle ? "D" : "Not d");
+ putchar('\r');
+ break;
+
+ case CMD_user:
+ new_message(MT_standout,
+ "Username to show: ");
+ if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
+ {
+ if (tempbuf2[0] == '+' &&
+ tempbuf2[1] == '\0')
+ {
+ ps.uid = -1;
+ }
+ else if ((i = userid(tempbuf2)) == -1)
+ {
+ new_message(MT_standout,
+ " %s: unknown user", tempbuf2);
+ no_command = Yes;
+ }
+ else
+ {
+ ps.uid = i;
+ }
+ putchar('\r');
+ }
+ else
+ {
+ clear_message();
+ }
+ break;
+
+#ifdef ORDER
+ case CMD_order:
+ new_message(MT_standout,
+ "Order to sort: ");
+ if (readline(tempbuf2, sizeof(tempbuf2), No) > 0)
+ {
+ if ((i = string_index(tempbuf2, statics.order_names)) == -1)
+ {
+ new_message(MT_standout,
+ " %s: unrecognized sorting order", tempbuf2);
+ no_command = Yes;
+ }
+ else
+ {
+ order_index = i;
+ }
+ putchar('\r');
+ }
+ else
+ {
+ clear_message();
+ }
+ break;
+#endif
+
+ default:
+ new_message(MT_standout, " BAD CASE IN SWITCH!");
+ putchar('\r');
+ }
+ }
+
+ /* flush out stuff that may have been written */
+ fflush(stdout);
+ }
+ }
+ }
+ }
+
+#ifdef DEBUG
+ fclose(debug);
+#endif
+ quit(0);
+ /*NOTREACHED*/
+}
+
+/*
+ * reset_display() - reset all the display routine pointers so that entire
+ * screen will get redrawn.
+ */
+
+reset_display()
+
+{
+ d_loadave = i_loadave;
+ d_procstates = i_procstates;
+ d_cpustates = i_cpustates;
+ d_memory = i_memory;
+ d_message = i_message;
+ d_header = i_header;
+ d_process = i_process;
+}
+
+/*
+ * signal handlers
+ */
+
+sigret_t leave() /* exit under normal conditions -- INT handler */
+
+{
+ end_screen();
+ exit(0);
+}
+
+sigret_t tstop(i) /* SIGTSTP handler */
+
+int i;
+
+{
+ /* move to the lower left */
+ end_screen();
+ fflush(stdout);
+
+ /* default the signal handler action */
+ (void) signal(SIGTSTP, SIG_DFL);
+
+ /* unblock the signal and send ourselves one */
+#ifdef SIGRELSE
+ sigrelse(SIGTSTP);
+#else
+ (void) sigsetmask(sigblock(0) & ~(1 << (SIGTSTP - 1)));
+#endif
+ (void) kill(0, SIGTSTP);
+
+ /* reset the signal handler */
+ (void) signal(SIGTSTP, tstop);
+
+ /* reinit screen */
+ reinit_screen();
+
+ /* jump to appropriate place */
+ longjmp(jmp_int, 1);
+
+ /*NOTREACHED*/
+}
+
+#ifdef SIGWINCH
+sigret_t winch(i) /* SIGWINCH handler */
+
+int i;
+
+{
+ /* reascertain the screen dimensions */
+ get_screensize();
+
+ /* tell display to resize */
+ max_topn = display_resize();
+
+ /* reset the signal handler */
+ (void) signal(SIGWINCH, winch);
+
+ /* jump to appropriate place */
+ longjmp(jmp_int, 1);
+}
+#endif
+
+void quit(status) /* exit under duress */
+
+int status;
+
+{
+ end_screen();
+ exit(status);
+ /*NOTREACHED*/
+}
+
+sigret_t onalrm() /* SIGALRM handler */
+
+{
+ /* this is only used in batch mode to break out of the pause() */
+ /* return; */
+}
+