8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
383 lines
9.1 KiB
C
383 lines
9.1 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifdef lint
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static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
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#endif
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/sysctl.h>
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#include <sys/queue.h>
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#include <err.h>
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#include <limits.h>
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#include <locale.h>
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#include <nlist.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "systat.h"
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#include "extern.h"
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static int dellave;
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kvm_t *kd;
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sig_t sigtstpdfl;
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double avenrun[3];
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int col;
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unsigned int delay = 5000000; /* in microseconds */
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int verbose = 1; /* to report kvm read errs */
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struct clockinfo clkinfo;
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double hertz;
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char c;
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char *namp;
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char hostname[MAXHOSTNAMELEN];
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WINDOW *wnd;
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int CMDLINE;
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int use_kvm = 1;
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static WINDOW *wload; /* one line window for load average */
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struct cmdentry {
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SLIST_ENTRY(cmdentry) link;
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char *cmd; /* Command name */
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char *argv; /* Arguments vector for a command */
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};
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SLIST_HEAD(, cmdentry) commands;
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static void
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parse_cmd_args (int argc, char **argv)
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{
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int in_command = 0;
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struct cmdentry *cmd = NULL;
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double t;
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while (argc) {
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if (argv[0][0] == '-') {
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if (in_command)
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SLIST_INSERT_HEAD(&commands, cmd, link);
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if (memcmp(argv[0], "--", 3) == 0) {
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in_command = 0; /*-- ends a command explicitly*/
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argc --, argv ++;
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continue;
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}
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cmd = calloc(1, sizeof(struct cmdentry));
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if (cmd == NULL)
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errx(1, "memory allocating failure");
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cmd->cmd = strdup(&argv[0][1]);
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if (cmd->cmd == NULL)
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errx(1, "memory allocating failure");
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in_command = 1;
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}
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else if (!in_command) {
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t = strtod(argv[0], NULL) * 1000000.0;
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if (t > 0 && t < (double)UINT_MAX)
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delay = (unsigned int)t;
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}
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else if (cmd != NULL) {
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cmd->argv = strdup(argv[0]);
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if (cmd->argv == NULL)
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errx(1, "memory allocating failure");
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in_command = 0;
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SLIST_INSERT_HEAD(&commands, cmd, link);
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}
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else
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errx(1, "invalid arguments list");
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argc--, argv++;
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}
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if (in_command && cmd != NULL)
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SLIST_INSERT_HEAD(&commands, cmd, link);
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}
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int
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main(int argc, char **argv)
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{
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char errbuf[_POSIX2_LINE_MAX], dummy;
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size_t size;
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struct cmdentry *cmd = NULL;
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(void) setlocale(LC_ALL, "");
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SLIST_INIT(&commands);
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argc--, argv++;
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if (argc > 0) {
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if (argv[0][0] == '-') {
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struct cmdtab *p;
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p = lookup(&argv[0][1]);
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if (p == (struct cmdtab *)-1)
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errx(1, "%s: ambiguous request", &argv[0][1]);
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if (p == (struct cmdtab *)0)
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errx(1, "%s: unknown request", &argv[0][1]);
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curcmd = p;
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argc--, argv++;
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}
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parse_cmd_args (argc, argv);
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}
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kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
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if (kd != NULL) {
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/*
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* Try to actually read something, we may be in a jail, and
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* have /dev/null opened as /dev/mem.
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*/
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if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 ||
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kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) !=
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sizeof(dummy)) {
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kvm_close(kd);
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kd = NULL;
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}
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}
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if (kd == NULL) {
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/*
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* Maybe we are lacking permissions? Retry, this time with bogus
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* devices. We can now use sysctl only.
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*/
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use_kvm = 0;
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kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, _PATH_DEVNULL,
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O_RDONLY, errbuf);
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if (kd == NULL) {
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error("%s", errbuf);
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exit(1);
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}
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}
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signal(SIGHUP, die);
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signal(SIGINT, die);
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signal(SIGQUIT, die);
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signal(SIGTERM, die);
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/*
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* Initialize display. Load average appears in a one line
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* window of its own. Current command's display appears in
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* an overlapping sub-window of stdscr configured by the display
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* routines to minimize update work by curses.
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*/
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initscr();
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CMDLINE = LINES - 1;
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wnd = (*curcmd->c_open)();
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if (wnd == NULL) {
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warnx("couldn't initialize display");
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die(0);
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}
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wload = newwin(1, 0, 1, 20);
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if (wload == NULL) {
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warnx("couldn't set up load average window");
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die(0);
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}
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gethostname(hostname, sizeof (hostname));
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size = sizeof(clkinfo);
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if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0)
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|| size != sizeof(clkinfo)) {
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error("kern.clockrate");
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die(0);
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}
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hertz = clkinfo.stathz;
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(*curcmd->c_init)();
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curcmd->c_flags |= CF_INIT;
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labels();
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if (curcmd->c_cmd != NULL)
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SLIST_FOREACH (cmd, &commands, link)
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if (!curcmd->c_cmd(cmd->cmd, cmd->argv))
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warnx("command is not understood");
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dellave = 0.0;
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display();
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noecho();
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crmode();
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keyboard();
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/*NOTREACHED*/
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return EXIT_SUCCESS;
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}
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void
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labels(void)
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{
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if (curcmd->c_flags & CF_LOADAV) {
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mvaddstr(0, 20,
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"/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10");
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mvaddstr(1, 5, "Load Average");
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}
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if (curcmd->c_flags & CF_ZFSARC) {
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mvaddstr(0, 20,
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" Total MFU MRU Anon Hdr L2Hdr Other");
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mvaddstr(1, 5, "ZFS ARC ");
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}
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(*curcmd->c_label)();
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#ifdef notdef
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mvprintw(21, 25, "CPU usage on %s", hostname);
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#endif
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refresh();
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}
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void
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display(void)
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{
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int i, j;
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/* Get the load average over the last minute. */
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(void) getloadavg(avenrun, nitems(avenrun));
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(*curcmd->c_fetch)();
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if (curcmd->c_flags & CF_LOADAV) {
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j = 5.0*avenrun[0] + 0.5;
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dellave -= avenrun[0];
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if (dellave >= 0.0)
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c = '<';
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else {
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c = '>';
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dellave = -dellave;
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}
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if (dellave < 0.1)
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c = '|';
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dellave = avenrun[0];
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wmove(wload, 0, 0); wclrtoeol(wload);
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for (i = MIN(j, 50); i > 0; i--)
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waddch(wload, c);
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if (j > 50)
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wprintw(wload, " %4.1f", avenrun[0]);
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}
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if (curcmd->c_flags & CF_ZFSARC) {
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uint64_t arc[7] = {};
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size_t size = sizeof(arc[0]);
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if (sysctlbyname("kstat.zfs.misc.arcstats.size",
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&arc[0], &size, NULL, 0) == 0 ) {
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GETSYSCTL("vfs.zfs.mfu_size", arc[1]);
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GETSYSCTL("vfs.zfs.mru_size", arc[2]);
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GETSYSCTL("vfs.zfs.anon_size", arc[3]);
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GETSYSCTL("kstat.zfs.misc.arcstats.hdr_size", arc[4]);
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GETSYSCTL("kstat.zfs.misc.arcstats.l2_hdr_size", arc[5]);
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GETSYSCTL("kstat.zfs.misc.arcstats.other_size", arc[6]);
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wmove(wload, 0, 0); wclrtoeol(wload);
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for (i = 0 ; i < nitems(arc); i++) {
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if (arc[i] > 10llu * 1024 * 1024 * 1024 ) {
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wprintw(wload, "%7lluG", arc[i] >> 30);
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}
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else if (arc[i] > 10 * 1024 * 1024 ) {
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wprintw(wload, "%7lluM", arc[i] >> 20);
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}
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else {
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wprintw(wload, "%7lluK", arc[i] >> 10);
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}
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}
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}
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}
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(*curcmd->c_refresh)();
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if (curcmd->c_flags & (CF_LOADAV |CF_ZFSARC))
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wrefresh(wload);
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wrefresh(wnd);
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move(CMDLINE, col);
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refresh();
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}
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void
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load(void)
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{
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(void) getloadavg(avenrun, nitems(avenrun));
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mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f",
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avenrun[0], avenrun[1], avenrun[2]);
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clrtoeol();
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}
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void
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die(int signo __unused)
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{
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move(CMDLINE, 0);
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clrtoeol();
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refresh();
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endwin();
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exit(0);
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}
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#include <stdarg.h>
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void
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error(const char *fmt, ...)
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{
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va_list ap;
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char buf[255];
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int oy, ox;
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va_start(ap, fmt);
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if (wnd) {
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getyx(stdscr, oy, ox);
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(void) vsnprintf(buf, sizeof(buf), fmt, ap);
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clrtoeol();
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standout();
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mvaddstr(CMDLINE, 0, buf);
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standend();
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move(oy, ox);
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refresh();
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} else {
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(void) vfprintf(stderr, fmt, ap);
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fprintf(stderr, "\n");
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}
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va_end(ap);
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}
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void
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nlisterr(struct nlist n_list[])
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{
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int i, n;
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n = 0;
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clear();
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mvprintw(2, 10, "systat: nlist: can't find following symbols:");
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for (i = 0;
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n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++)
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if (n_list[i].n_value == 0)
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mvprintw(2 + ++n, 10, "%s", n_list[i].n_name);
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move(CMDLINE, 0);
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clrtoeol();
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refresh();
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endwin();
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exit(1);
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}
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