diff options
Diffstat (limited to 'usr.bin/systat/main.c')
| -rw-r--r-- | usr.bin/systat/main.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/usr.bin/systat/main.c b/usr.bin/systat/main.c new file mode 100644 index 0000000..3c6b49f --- /dev/null +++ b/usr.bin/systat/main.c @@ -0,0 +1,292 @@ +/*- + * Copyright (c) 1980, 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +__FBSDID("$FreeBSD$"); + +#ifdef lint +static const char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; +#endif + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1980, 1992, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/sysctl.h> + +#include <err.h> +#include <limits.h> +#include <locale.h> +#include <nlist.h> +#include <paths.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include "systat.h" +#include "extern.h" + +static int dellave; + +kvm_t *kd; +sig_t sigtstpdfl; +double avenrun[3]; +int col; +int naptime = 5; +int verbose = 1; /* to report kvm read errs */ +struct clockinfo clkinfo; +double hertz; +char c; +char *namp; +char hostname[MAXHOSTNAMELEN]; +WINDOW *wnd; +int CMDLINE; +int use_kvm = 1; + +static WINDOW *wload; /* one line window for load average */ + +int +main(int argc, char **argv) +{ + char errbuf[_POSIX2_LINE_MAX], dummy; + size_t size; + + (void) setlocale(LC_ALL, ""); + + argc--, argv++; + while (argc > 0) { + if (argv[0][0] == '-') { + struct cmdtab *p; + + p = lookup(&argv[0][1]); + if (p == (struct cmdtab *)-1) + errx(1, "%s: ambiguous request", &argv[0][1]); + if (p == (struct cmdtab *)0) + errx(1, "%s: unknown request", &argv[0][1]); + curcmd = p; + } else { + naptime = atoi(argv[0]); + if (naptime <= 0) + naptime = 5; + } + argc--, argv++; + } + kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); + if (kd != NULL) { + /* + * Try to actually read something, we may be in a jail, and + * have /dev/null opened as /dev/mem. + */ + if (kvm_nlist(kd, namelist) != 0 || namelist[0].n_value == 0 || + kvm_read(kd, namelist[0].n_value, &dummy, sizeof(dummy)) != + sizeof(dummy)) { + kvm_close(kd); + kd = NULL; + } + } + if (kd == NULL) { + /* + * Maybe we are lacking permissions? Retry, this time with bogus + * devices. We can now use sysctl only. + */ + use_kvm = 0; + kd = kvm_openfiles("/dev/null", "/dev/null", "/dev/null", + O_RDONLY, errbuf); + if (kd == NULL) { + error("%s", errbuf); + exit(1); + } + } + signal(SIGHUP, die); + signal(SIGINT, die); + signal(SIGQUIT, die); + signal(SIGTERM, die); + + /* + * Initialize display. Load average appears in a one line + * window of its own. Current command's display appears in + * an overlapping sub-window of stdscr configured by the display + * routines to minimize update work by curses. + */ + initscr(); + CMDLINE = LINES - 1; + wnd = (*curcmd->c_open)(); + if (wnd == NULL) { + warnx("couldn't initialize display"); + die(0); + } + wload = newwin(1, 0, 1, 20); + if (wload == NULL) { + warnx("couldn't set up load average window"); + die(0); + } + gethostname(hostname, sizeof (hostname)); + size = sizeof(clkinfo); + if (sysctlbyname("kern.clockrate", &clkinfo, &size, NULL, 0) + || size != sizeof(clkinfo)) { + error("kern.clockrate"); + die(0); + } + hertz = clkinfo.stathz; + (*curcmd->c_init)(); + curcmd->c_flags |= CF_INIT; + labels(); + + dellave = 0.0; + + signal(SIGALRM, display); + display(0); + noecho(); + crmode(); + keyboard(); + /*NOTREACHED*/ + + return EXIT_SUCCESS; +} + +void +labels(void) +{ + if (curcmd->c_flags & CF_LOADAV) { + mvaddstr(0, 20, + "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); + mvaddstr(1, 5, "Load Average"); + } + (*curcmd->c_label)(); +#ifdef notdef + mvprintw(21, 25, "CPU usage on %s", hostname); +#endif + refresh(); +} + +void +display(int signo __unused) +{ + int i, j; + + /* Get the load average over the last minute. */ + (void) getloadavg(avenrun, sizeof(avenrun) / sizeof(avenrun[0])); + (*curcmd->c_fetch)(); + if (curcmd->c_flags & CF_LOADAV) { + j = 5.0*avenrun[0] + 0.5; + dellave -= avenrun[0]; + if (dellave >= 0.0) + c = '<'; + else { + c = '>'; + dellave = -dellave; + } + if (dellave < 0.1) + c = '|'; + dellave = avenrun[0]; + wmove(wload, 0, 0); wclrtoeol(wload); + for (i = (j > 50) ? 50 : j; i > 0; i--) + waddch(wload, c); + if (j > 50) + wprintw(wload, " %4.1f", avenrun[0]); + } + (*curcmd->c_refresh)(); + if (curcmd->c_flags & CF_LOADAV) + wrefresh(wload); + wrefresh(wnd); + move(CMDLINE, col); + refresh(); + alarm(naptime); +} + +void +load(void) +{ + + (void) getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])); + mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", + avenrun[0], avenrun[1], avenrun[2]); + clrtoeol(); +} + +void +die(int signo __unused) +{ + move(CMDLINE, 0); + clrtoeol(); + refresh(); + endwin(); + exit(0); +} + +#include <stdarg.h> + +void +error(const char *fmt, ...) +{ + va_list ap; + char buf[255]; + int oy, ox; + + va_start(ap, fmt); + if (wnd) { + getyx(stdscr, oy, ox); + (void) vsnprintf(buf, sizeof(buf), fmt, ap); + clrtoeol(); + standout(); + mvaddstr(CMDLINE, 0, buf); + standend(); + move(oy, ox); + refresh(); + } else { + (void) vfprintf(stderr, fmt, ap); + fprintf(stderr, "\n"); + } + va_end(ap); +} + +void +nlisterr(struct nlist n_list[]) +{ + int i, n; + + n = 0; + clear(); + mvprintw(2, 10, "systat: nlist: can't find following symbols:"); + for (i = 0; + n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) + if (n_list[i].n_value == 0) + mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); + move(CMDLINE, 0); + clrtoeol(); + refresh(); + endwin(); + exit(1); +} |
