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-rw-r--r--usr.sbin/iostat/iostat.c391
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diff --git a/usr.sbin/iostat/iostat.c b/usr.sbin/iostat/iostat.c
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+/*-
+ * Copyright (c) 1986, 1991, 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) 1986, 1991, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)iostat.c 8.2 (Berkeley) 1/26/94";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/buf.h>
+#include <sys/dkstat.h>
+
+#include <err.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <kvm.h>
+#include <limits.h>
+#include <nlist.h>
+#include <paths.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+struct nlist namelist[] = {
+#define X_DK_TIME 0
+ { "_dk_time" },
+#define X_DK_XFER 1
+ { "_dk_xfer" },
+#define X_DK_WDS 2
+ { "_dk_wds" },
+#define X_TK_NIN 3
+ { "_tk_nin" },
+#define X_TK_NOUT 4
+ { "_tk_nout" },
+#define X_DK_SEEK 5
+ { "_dk_seek" },
+#define X_CP_TIME 6
+ { "_cp_time" },
+#define X_DK_WPMS 7
+ { "_dk_wpms" },
+#define X_HZ 8
+ { "_hz" },
+#define X_STATHZ 9
+ { "_stathz" },
+#define X_DK_NDRIVE 10
+ { "_dk_ndrive" },
+#define X_END 10
+#if defined(hp300) || defined(luna68k)
+#define X_HPDINIT (X_END+1)
+ { "_hp_dinit" },
+#endif
+#ifdef mips
+#define X_SCSI_DINIT (X_END+1)
+ { "_scsi_dinit" },
+#endif
+#ifdef tahoe
+#define X_VBDINIT (X_END+1)
+ { "_vbdinit" },
+#endif
+#ifdef vax
+ { "_mbdinit" },
+#define X_MBDINIT (X_END+1)
+ { "_ubdinit" },
+#define X_UBDINIT (X_END+2)
+#endif
+ { NULL },
+};
+
+struct _disk {
+ long cp_time[CPUSTATES];
+ long *dk_time;
+ long *dk_wds;
+ long *dk_seek;
+ long *dk_xfer;
+ long tk_nin;
+ long tk_nout;
+} cur, last;
+
+kvm_t *kd;
+double etime;
+long *dk_wpms;
+int dk_ndrive, *dr_select, hz, kmemfd, ndrives;
+char **dr_name;
+
+#define nlread(x, v) \
+ kvm_read(kd, namelist[x].n_value, &(v), sizeof(v))
+
+#include "names.c" /* XXX */
+
+void cpustats __P((void));
+void dkstats __P((void));
+void phdr __P((int));
+void usage __P((void));
+
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ register int i;
+ long tmp;
+ int ch, hdrcnt, reps, interval, stathz, ndrives;
+ char **cp, *memf, *nlistf, buf[30];
+ char errbuf[_POSIX2_LINE_MAX];
+
+ interval = reps = 0;
+ nlistf = memf = NULL;
+ while ((ch = getopt(argc, argv, "c:M:N:w:")) != EOF)
+ switch(ch) {
+ case 'c':
+ if ((reps = atoi(optarg)) <= 0)
+ errx(1, "repetition count <= 0.");
+ break;
+ case 'M':
+ memf = optarg;
+ break;
+ case 'N':
+ nlistf = optarg;
+ break;
+ case 'w':
+ if ((interval = atoi(optarg)) <= 0)
+ errx(1, "interval <= 0.");
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ /*
+ * Discard setgid privileges if not the running kernel so that bad
+ * guys can't print interesting stuff from kernel memory.
+ */
+ if (nlistf != NULL || memf != NULL)
+ setgid(getgid());
+
+ kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
+ if (kd == 0)
+ errx(1, "kvm_openfiles: %s", errbuf);
+ if (kvm_nlist(kd, namelist) == -1)
+ errx(1, "kvm_nlist: %s", kvm_geterr(kd));
+ if (namelist[X_DK_NDRIVE].n_type == 0)
+ errx(1, "dk_ndrive not found in namelist");
+ (void)nlread(X_DK_NDRIVE, dk_ndrive);
+ if (dk_ndrive <= 0)
+ errx(1, "invalid dk_ndrive %d\n", dk_ndrive);
+
+ cur.dk_time = calloc(dk_ndrive, sizeof(long));
+ cur.dk_wds = calloc(dk_ndrive, sizeof(long));
+ cur.dk_seek = calloc(dk_ndrive, sizeof(long));
+ cur.dk_xfer = calloc(dk_ndrive, sizeof(long));
+ last.dk_time = calloc(dk_ndrive, sizeof(long));
+ last.dk_wds = calloc(dk_ndrive, sizeof(long));
+ last.dk_seek = calloc(dk_ndrive, sizeof(long));
+ last.dk_xfer = calloc(dk_ndrive, sizeof(long));
+ dr_select = calloc(dk_ndrive, sizeof(int));
+ dr_name = calloc(dk_ndrive, sizeof(char *));
+ dk_wpms = calloc(dk_ndrive, sizeof(long));
+
+ for (i = 0; i < dk_ndrive; i++) {
+ (void)sprintf(buf, "dk%d", i);
+ dr_name[i] = strdup(buf);
+ }
+ if (!read_names())
+ exit(1);
+ (void)nlread(X_HZ, hz);
+ (void)nlread(X_STATHZ, stathz);
+ if (stathz)
+ hz = stathz;
+ (void)kvm_read(kd, namelist[X_DK_WPMS].n_value, dk_wpms,
+ dk_ndrive * sizeof(dk_wpms));
+
+ /*
+ * Choose drives to be displayed. Priority goes to (in order) drives
+ * supplied as arguments and default drives. If everything isn't
+ * filled in and there are drives not taken care of, display the first
+ * few that fit.
+ *
+ * The backward compatibility #ifdefs permit the syntax:
+ * iostat [ drives ] [ interval [ count ] ]
+ */
+#define BACKWARD_COMPATIBILITY
+ for (ndrives = 0; *argv; ++argv) {
+#ifdef BACKWARD_COMPATIBILITY
+ if (isdigit(**argv))
+ break;
+#endif
+ for (i = 0; i < dk_ndrive; i++) {
+ if (strcmp(dr_name[i], *argv))
+ continue;
+ dr_select[i] = 1;
+ ++ndrives;
+ }
+ }
+#ifdef BACKWARD_COMPATIBILITY
+ if (*argv) {
+ interval = atoi(*argv);
+ if (*++argv)
+ reps = atoi(*argv);
+ }
+#endif
+
+ if (interval) {
+ if (!reps)
+ reps = -1;
+ } else
+ if (reps)
+ interval = 1;
+
+ for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
+ if (dr_select[i] || dk_wpms[i] == 0)
+ continue;
+ for (cp = defdrives; *cp; cp++)
+ if (strcmp(dr_name[i], *cp) == 0) {
+ dr_select[i] = 1;
+ ++ndrives;
+ break;
+ }
+ }
+ for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
+ if (dr_select[i])
+ continue;
+ dr_select[i] = 1;
+ ++ndrives;
+ }
+
+ (void)signal(SIGCONT, phdr);
+
+ for (hdrcnt = 1;;) {
+ if (!--hdrcnt) {
+ phdr(0);
+ hdrcnt = 20;
+ }
+ (void)kvm_read(kd, namelist[X_DK_TIME].n_value,
+ cur.dk_time, dk_ndrive * sizeof(long));
+ (void)kvm_read(kd, namelist[X_DK_XFER].n_value,
+ cur.dk_xfer, dk_ndrive * sizeof(long));
+ (void)kvm_read(kd, namelist[X_DK_WDS].n_value,
+ cur.dk_wds, dk_ndrive * sizeof(long));
+ (void)kvm_read(kd, namelist[X_DK_SEEK].n_value,
+ cur.dk_seek, dk_ndrive * sizeof(long));
+ (void)kvm_read(kd, namelist[X_TK_NIN].n_value,
+ &cur.tk_nin, sizeof(cur.tk_nin));
+ (void)kvm_read(kd, namelist[X_TK_NOUT].n_value,
+ &cur.tk_nout, sizeof(cur.tk_nout));
+ (void)kvm_read(kd, namelist[X_CP_TIME].n_value,
+ cur.cp_time, sizeof(cur.cp_time));
+ for (i = 0; i < dk_ndrive; i++) {
+ if (!dr_select[i])
+ continue;
+#define X(fld) tmp = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = tmp
+ X(dk_xfer);
+ X(dk_seek);
+ X(dk_wds);
+ X(dk_time);
+ }
+ tmp = cur.tk_nin;
+ cur.tk_nin -= last.tk_nin;
+ last.tk_nin = tmp;
+ tmp = cur.tk_nout;
+ cur.tk_nout -= last.tk_nout;
+ last.tk_nout = tmp;
+ etime = 0;
+ for (i = 0; i < CPUSTATES; i++) {
+ X(cp_time);
+ etime += cur.cp_time[i];
+ }
+ if (etime == 0.0)
+ etime = 1.0;
+ etime /= (float)hz;
+ (void)printf("%4.0f%5.0f",
+ cur.tk_nin / etime, cur.tk_nout / etime);
+ dkstats();
+ cpustats();
+ (void)printf("\n");
+ (void)fflush(stdout);
+
+ if (reps >= 0 && --reps <= 0)
+ break;
+ (void)sleep(interval);
+ }
+ exit(0);
+}
+
+/* ARGUSED */
+void
+phdr(signo)
+ int signo;
+{
+ register int i;
+
+ (void)printf(" tty");
+ for (i = 0; i < dk_ndrive; i++)
+ if (dr_select[i])
+ (void)printf(" %3.3s ", dr_name[i]);
+ (void)printf(" cpu\n tin tout");
+ for (i = 0; i < dk_ndrive; i++)
+ if (dr_select[i])
+ (void)printf(" sps tps msps ");
+ (void)printf(" us ni sy id\n");
+}
+
+void
+dkstats()
+{
+ register int dn;
+ double atime, itime, msps, words, xtime;
+
+ for (dn = 0; dn < dk_ndrive; ++dn) {
+ if (!dr_select[dn])
+ continue;
+ words = cur.dk_wds[dn] * 32; /* words xfer'd */
+ (void)printf("%4.0f", /* sectors */
+ words / (DEV_BSIZE / 2) / etime);
+
+ (void)printf("%4.0f", cur.dk_xfer[dn] / etime);
+
+ if (dk_wpms[dn] && cur.dk_xfer[dn]) {
+ atime = cur.dk_time[dn]; /* ticks disk busy */
+ atime /= (float)hz; /* ticks to seconds */
+ xtime = words / dk_wpms[dn]; /* transfer time */
+ itime = atime - xtime; /* time not xfer'ing */
+ if (itime < 0)
+ msps = 0;
+ else
+ msps = itime * 1000 / cur.dk_xfer[dn];
+ } else
+ msps = 0;
+ (void)printf("%5.1f ", msps);
+ }
+}
+
+void
+cpustats()
+{
+ register int state;
+ double time;
+
+ time = 0;
+ for (state = 0; state < CPUSTATES; ++state)
+ time += cur.cp_time[state];
+ for (state = 0; state < CPUSTATES; ++state)
+ (void)printf("%3.0f",
+ 100. * cur.cp_time[state] / (time ? time : 1));
+}
+
+void
+usage()
+{
+ (void)fprintf(stderr,
+"usage: iostat [-c count] [-M core] [-N system] [-w wait] [drives]\n");
+ exit(1);
+}
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