auto import from //depot/cupcake/@135843
diff --git a/toolbox/vmstat.c b/toolbox/vmstat.c
new file mode 100644
index 0000000..600f136
--- /dev/null
+++ b/toolbox/vmstat.c
@@ -0,0 +1,247 @@
+/*
+ * Copyright (c) 2008, The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of Google, Inc. 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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 <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/param.h>
+#include <unistd.h>
+
+struct state {
+ long procs_r;
+ long procs_b;
+
+ long mem_free;
+ long mem_mapped;
+ long mem_anon;
+ long mem_slab;
+
+ long sys_in;
+ long sys_cs;
+ long sys_flt;
+
+ long cpu_us;
+ long cpu_ni;
+ long cpu_sy;
+ long cpu_id;
+ long cpu_wa;
+ long cpu_ir;
+ long cpu_si;
+};
+
+#define MAX_LINE 256
+
+char line[MAX_LINE];
+
+static void read_state(struct state *s);
+static int read_meminfo(struct state *s);
+static int read_stat(struct state *s);
+static int read_vmstat(struct state *s);
+static void print_header(void);
+static void print_line(struct state *old, struct state *new);
+static void usage(char *cmd);
+
+int vmstat_main(int argc, char *argv[]) {
+ struct state s[2];
+ int iterations, delay, header_interval;
+ int toggle, count;
+ int i;
+
+ iterations = 0;
+ delay = 1;
+ header_interval = 20;
+
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "-n")) {
+ if (i >= argc - 1) {
+ fprintf(stderr, "Option -n requires an argument.\n");
+ exit(EXIT_FAILURE);
+ }
+ iterations = atoi(argv[++i]);
+ continue;
+ }
+ if (!strcmp(argv[i], "-d")) {
+ if (i >= argc - 1) {
+ fprintf(stderr, "Option -d requires an argument.\n");
+ exit(EXIT_FAILURE);
+ }
+ delay = atoi(argv[++i]);
+ continue;
+ }
+ if (!strcmp(argv[i], "-r")) {
+ if (i >= argc - 1) {
+ fprintf(stderr, "Option -r requires an argument.\n");
+ exit(EXIT_FAILURE);
+ }
+ header_interval = atoi(argv[++i]);
+ continue;
+ }
+ if (!strcmp(argv[i], "-h")) {
+ usage(argv[0]);
+ exit(EXIT_SUCCESS);
+ }
+ fprintf(stderr, "Invalid argument \"%s\".\n", argv[i]);
+ usage(argv[0]);
+ exit(EXIT_FAILURE);
+ }
+
+ toggle = 0;
+ count = 0;
+
+ if (!header_interval)
+ print_header();
+ read_state(&s[1 - toggle]);
+ while ((iterations == 0) || (iterations-- > 0)) {
+ sleep(delay);
+ read_state(&s[toggle]);
+ if (header_interval) {
+ if (count == 0)
+ print_header();
+ count = (count + 1) % header_interval;
+ }
+ print_line(&s[1 - toggle], &s[toggle]);
+ toggle = 1 - toggle;
+ }
+
+ return 0;
+}
+
+static void read_state(struct state *s) {
+ int error;
+
+ error = read_meminfo(s);
+ if (error) {
+ fprintf(stderr, "vmstat: could not read /proc/meminfo: %s\n", strerror(error));
+ exit(EXIT_FAILURE);
+ }
+
+ error = read_stat(s);
+ if (error) {
+ fprintf(stderr, "vmstat: could not read /proc/stat: %s\n", strerror(error));
+ exit(EXIT_FAILURE);
+ }
+
+ error = read_vmstat(s);
+ if (error) {
+ fprintf(stderr, "vmstat: could not read /proc/vmstat: %s\n", strerror(error));
+ exit(EXIT_FAILURE);
+ }
+}
+
+static int read_meminfo(struct state *s) {
+ FILE *f;
+
+ f = fopen("/proc/meminfo", "r");
+ if (!f) return errno;
+
+ while (fgets(line, MAX_LINE, f)) {
+ sscanf(line, "MemFree: %ld kB", &s->mem_free);
+ sscanf(line, "AnonPages: %ld kB", &s->mem_anon);
+ sscanf(line, "Mapped: %ld kB", &s->mem_mapped);
+ sscanf(line, "Slab: %ld kB", &s->mem_slab);
+ }
+
+ fclose(f);
+
+ return 0;
+}
+
+static int read_stat(struct state *s) {
+ FILE *f;
+
+ f = fopen("/proc/stat", "r");
+ if (!f) return errno;
+
+ while (fgets(line, MAX_LINE, f)) {
+ if (!strncmp(line, "cpu ", 4)) {
+ sscanf(line, "cpu %ld %ld %ld %ld %ld %ld %ld",
+ &s->cpu_us, &s->cpu_ni, &s->cpu_sy, &s->cpu_id, &s->cpu_wa,
+ &s->cpu_ir, &s->cpu_si);
+ }
+ sscanf(line, "intr %ld", &s->sys_in);
+ sscanf(line, "ctxt %ld", &s->sys_cs);
+ sscanf(line, "procs_running %ld", &s->procs_r);
+ sscanf(line, "procs_blocked %ld", &s->procs_b);
+ }
+
+ fclose(f);
+
+ return 0;
+}
+
+static int read_vmstat(struct state *s) {
+ FILE *f;
+
+ f = fopen("/proc/vmstat", "r");
+ if (!f) return errno;
+
+ while (fgets(line, MAX_LINE, f)) {
+ sscanf(line, "pgmajfault %ld", &s->sys_flt);
+ }
+
+ fclose(f);
+
+ return 0;
+}
+
+static void print_header(void) {
+ printf("%-5s %-27s %-14s %-17s\n", "procs", "memory", "system", "cpu");
+ printf("%2s %2s %6s %6s %6s %6s %4s %4s %4s %2s %2s %2s %2s %2s %2s\n", "r", "b", "free", "mapped", "anon", "slab", "in", "cs", "flt", "us", "ni", "sy", "id", "wa", "ir");
+}
+
+/* Jiffies to percent conversion */
+#define JP(jif) ((jif) * 100 / (HZ))
+#define NORM(var) ((var) = (((var) > 99) ? (99) : (var)))
+
+static void print_line(struct state *old, struct state *new) {
+ int us, ni, sy, id, wa, ir;
+ us = JP(new->cpu_us - old->cpu_us); NORM(us);
+ ni = JP(new->cpu_ni - old->cpu_ni); NORM(ni);
+ sy = JP(new->cpu_sy - old->cpu_sy); NORM(sy);
+ id = JP(new->cpu_id - old->cpu_id); NORM(id);
+ wa = JP(new->cpu_wa - old->cpu_wa); NORM(wa);
+ ir = JP(new->cpu_ir - old->cpu_ir); NORM(ir);
+ printf("%2ld %2ld %6ld %6ld %6ld %6ld %4ld %4ld %4ld %2d %2d %2d %2d %2d %2d\n",
+ new->procs_r ? (new->procs_r - 1) : 0, new->procs_b,
+ new->mem_free, new->mem_mapped, new->mem_anon, new->mem_slab,
+ new->sys_in - old->sys_in, new->sys_cs - old->sys_cs, new->sys_flt - old->sys_flt,
+ us, ni, sy, id, wa, ir);
+}
+
+static void usage(char *cmd) {
+ fprintf(stderr, "Usage: %s [ -h ] [ -n iterations ] [ -d delay ] [ -r header_repeat ]\n"
+ " -n iterations How many rows of data to print.\n"
+ " -d delay How long to sleep between rows.\n"
+ " -r header_repeat How many rows to print before repeating\n"
+ " the header. Zero means never repeat.\n"
+ " -h Displays this help screen.\n",
+ cmd);
+}