Stop free() even if kvm_getprocs as we can come back but set nprocs = 0. Check nprocs in showpigs() to ensure not try displaying with kvm_getprocs failed. Current code can have pt with non-null after kvm_getprocs() failure. Replace to realloc for simpler operations. Submitted by: Yoshihiro Ota ota@j.email.ne.jp Reviewed by: mckusick@ Differential Revision: https://reviews.freebsd.org/D29303
193 lines
4.4 KiB
C
193 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)pigs.c 8.2 (Berkeley) 9/23/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Pigs display from Bill Reeves at Lucasfilm
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/user.h>
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#include <curses.h>
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#include <math.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include "systat.h"
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#include "extern.h"
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int compar(const void *, const void *);
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static int nproc;
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static struct p_times {
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float pt_pctcpu;
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struct kinfo_proc *pt_kp;
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} *pt = NULL;
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static int fscale;
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static double lccpu;
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WINDOW *
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openpigs(void)
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{
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return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
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}
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void
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closepigs(WINDOW *w)
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{
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if (w == NULL)
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return;
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wclear(w);
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wrefresh(w);
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delwin(w);
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}
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void
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showpigs(void)
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{
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int i, j, y, k;
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const char *uname, *pname;
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char pidname[30];
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if (nproc == 0)
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return;
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qsort(pt, nproc, sizeof (struct p_times), compar);
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y = 1;
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i = nproc;
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if (i > getmaxy(wnd)-2)
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i = getmaxy(wnd)-2;
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for (k = 0; i > 0 && pt[k].pt_pctcpu > 0.01; i--, y++, k++) {
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uname = user_from_uid(pt[k].pt_kp->ki_uid, 0);
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pname = pt[k].pt_kp->ki_comm;
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wmove(wnd, y, 0);
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wclrtoeol(wnd);
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mvwaddstr(wnd, y, 0, uname);
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snprintf(pidname, sizeof(pidname), "%10.10s", pname);
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mvwaddstr(wnd, y, 9, pidname);
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wmove(wnd, y, 20);
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for (j = pt[k].pt_pctcpu * 50 + 0.5; j > 0; j--)
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waddch(wnd, 'X');
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}
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wmove(wnd, y, 0); wclrtobot(wnd);
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}
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int
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initpigs(void)
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{
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fixpt_t ccpu;
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size_t len;
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int err;
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len = sizeof(ccpu);
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err = sysctlbyname("kern.ccpu", &ccpu, &len, NULL, 0);
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if (err || len != sizeof(ccpu)) {
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perror("kern.ccpu");
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return (0);
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}
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len = sizeof(fscale);
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err = sysctlbyname("kern.fscale", &fscale, &len, NULL, 0);
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if (err || len != sizeof(fscale)) {
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perror("kern.fscale");
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return (0);
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}
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lccpu = log((double) ccpu / fscale);
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return(1);
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}
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void
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fetchpigs(void)
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{
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int i;
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float ftime;
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float *pctp;
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struct kinfo_proc *kpp;
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static int maxnproc = 0;
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if ((kpp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc)) == NULL) {
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error("%s", kvm_geterr(kd));
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nproc = 0;
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return;
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}
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if (nproc > maxnproc) {
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if ((pt = realloc(pt, nproc * sizeof(*pt))) == NULL) {
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error("Out of memory");
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die(0);
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}
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maxnproc = nproc;
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}
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/*
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* calculate %cpu for each proc
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*/
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for (i = 0; i < nproc; i++) {
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pt[i].pt_kp = &kpp[i];
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pctp = &pt[i].pt_pctcpu;
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ftime = kpp[i].ki_swtime;
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if (ftime == 0 || (kpp[i].ki_flag & P_INMEM) == 0)
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*pctp = 0;
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else
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*pctp = ((double) kpp[i].ki_pctcpu /
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fscale) / (1.0 - exp(ftime * lccpu));
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}
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}
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void
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labelpigs(void)
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{
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wmove(wnd, 0, 0);
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wclrtoeol(wnd);
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mvwaddstr(wnd, 0, 20,
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"/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
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}
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int
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compar(const void *a, const void *b)
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{
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return (((const struct p_times *) a)->pt_pctcpu >
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((const struct p_times *) b)->pt_pctcpu)? -1: 1;
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}
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