/*- * 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 __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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "systat.h" #include "extern.h" static int dellave; kvm_t *kd; sig_t sigtstpdfl; double avenrun[3]; int col; unsigned int delay = 5000000; /* in microseconds */ 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 */ struct cmdentry { SLIST_ENTRY(cmdentry) link; char *cmd; /* Command name */ char *argv; /* Arguments vector for a command */ }; SLIST_HEAD(, cmdentry) commands; static void parse_cmd_args (int argc, char **argv) { int in_command = 0; struct cmdentry *cmd = NULL; double t; while (argc) { if (argv[0][0] == '-') { if (in_command) SLIST_INSERT_HEAD(&commands, cmd, link); if (memcmp(argv[0], "--", 3) == 0) { in_command = 0; /*-- ends a command explicitly*/ argc --, argv ++; continue; } cmd = calloc(1, sizeof(struct cmdentry)); if (cmd == NULL) errx(1, "memory allocating failure"); cmd->cmd = strdup(&argv[0][1]); if (cmd->cmd == NULL) errx(1, "memory allocating failure"); in_command = 1; } else if (!in_command) { t = strtod(argv[0], NULL) * 1000000.0; if (t > 0 && t < (double)UINT_MAX) delay = (unsigned int)t; } else if (cmd != NULL) { cmd->argv = strdup(argv[0]); if (cmd->argv == NULL) errx(1, "memory allocating failure"); in_command = 0; SLIST_INSERT_HEAD(&commands, cmd, link); } else errx(1, "invalid arguments list"); argc--, argv++; } if (in_command && cmd != NULL) SLIST_INSERT_HEAD(&commands, cmd, link); } int main(int argc, char **argv) { char errbuf[_POSIX2_LINE_MAX], dummy; size_t size; double t; struct cmdentry *cmd = NULL; #ifdef USE_WIDECHAR (void) setlocale(LC_ALL, ""); #else (void) setlocale(LC_TIME, ""); #endif SLIST_INIT(&commands); argc--, argv++; if (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; argc--, argv++; } parse_cmd_args (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(); if (curcmd->c_cmd != NULL) SLIST_FOREACH (cmd, &commands, link) if (!curcmd->c_cmd(cmd->cmd, cmd->argv)) warnx("command is not understood"); dellave = 0.0; display(); 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(void) { 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(); } 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 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); }