diff options
Diffstat (limited to 'usr.bin/systat/main.c')
| -rw-r--r-- | usr.bin/systat/main.c | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/usr.bin/systat/main.c b/usr.bin/systat/main.c new file mode 100644 index 0000000..f9f7672 --- /dev/null +++ b/usr.bin/systat/main.c @@ -0,0 +1,286 @@ +/*- + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 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. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1980, 1992, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include <sys/param.h> + +#include <nlist.h> +#include <signal.h> +#include <stdio.h> +#include "systat.h" +#include "extern.h" + +static struct nlist namelist[] = { +#define X_FIRST 0 +#define X_HZ 0 + { "_hz" }, +#define X_STATHZ 1 + { "_stathz" }, + { "" } +}; +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 */ +int hz, stathz; +char c; +char *namp; +char hostname[MAXHOSTNAMELEN]; +WINDOW *wnd; +int CMDLINE; + +static WINDOW *wload; /* one line window for load average */ + +void +main(argc, argv) + int argc; + char **argv; +{ + char errbuf[80]; + + argc--, argv++; + while (argc > 0) { + if (argv[0][0] == '-') { + struct cmdtab *p; + + p = lookup(&argv[0][1]); + if (p == (struct cmdtab *)-1) { + fprintf(stderr, "%s: unknown request\n", + &argv[0][1]); + exit(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) { + error("%s", errbuf); + exit(1); + } + if (kvm_nlist(kd, namelist)) { + nlisterr(namelist); + exit(1); + } + if (namelist[X_FIRST].n_type == 0) { + fprintf(stderr, "couldn't read namelist.\n"); + exit(1); + } + 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) { + fprintf(stderr, "Couldn't initialize display.\n"); + die(0); + } + wload = newwin(1, 0, 3, 20); + if (wload == NULL) { + fprintf(stderr, "Couldn't set up load average window.\n"); + die(0); + } + gethostname(hostname, sizeof (hostname)); + NREAD(X_HZ, &hz, LONG); + NREAD(X_STATHZ, &stathz, LONG); + (*curcmd->c_init)(); + curcmd->c_flags |= CF_INIT; + labels(); + + dellave = 0.0; + + signal(SIGALRM, display); + display(0); + noecho(); + crmode(); + keyboard(); + /*NOTREACHED*/ +} + +void +labels() +{ + if (curcmd->c_flags & CF_LOADAV) { + mvaddstr(2, 20, + "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); + mvaddstr(3, 5, "Load Average"); + } + (*curcmd->c_label)(); +#ifdef notdef + mvprintw(21, 25, "CPU usage on %s", hostname); +#endif + refresh(); +} + +void +display(signo) + int signo; +{ + register 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) 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(signo) + int signo; +{ + move(CMDLINE, 0); + clrtoeol(); + refresh(); + endwin(); + exit(0); +} + +#if __STDC__ +#include <stdarg.h> +#else +#include <varargs.h> +#endif + +#if __STDC__ +void +error(const char *fmt, ...) +#else +void +error(fmt, va_alist) + char *fmt; + va_dcl +#endif +{ + va_list ap; + char buf[255]; + int oy, ox; +#if __STDC__ + va_start(ap, fmt); +#else + va_start(ap); +#endif + + if (wnd) { + getyx(stdscr, oy, ox); + (void) vsprintf(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(namelist) + struct nlist namelist[]; +{ + int i, n; + + n = 0; + clear(); + mvprintw(2, 10, "systat: nlist: can't find following symbols:"); + for (i = 0; + namelist[i].n_name != NULL && *namelist[i].n_name != '\0'; i++) + if (namelist[i].n_value == 0) + mvprintw(2 + ++n, 10, "%s", namelist[i].n_name); + move(CMDLINE, 0); + clrtoeol(); + refresh(); + endwin(); + exit(1); +} |
