add diskstat.c

git-svn-id: http://opensvn.csie.org/pttbbs/pttbbs/trunk/pttbbs@740 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 99 insertions, 0 deletions

diff --git a/util/diskstat.c b/util/diskstat.c
new file mode 100644
index 00000000..86b6291c
--- /dev/null
+++ b/util/diskstat.c
@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/dkstat.h>
+#include <devstat.h>
+#include <err.h>
+
+int main(int argc, char **argv)
+{
+    return 0;
+}
+
+#if 0
+typedef enum {
+	DS_MATCHTYPE_NONE,
+	DS_MATCHTYPE_SPEC,
+	DS_MATCHTYPE_PATTERN
+} last_match_type;
+last_match_type last_type;
+struct device_selection *dev_select;
+long generation;
+int num_devices, num_selected;
+int num_selections;
+long select_generation;
+struct devstat_match *matches = NULL;
+int num_matches = 0;
+char **specified_devices;
+int num_devices_specified = 0;
+
+int
+dsinit(int maxshowdevs, struct statinfo *s1, struct statinfo *s2,
+       struct statinfo *s3)
+{
+	generation = 0;
+	num_devices = 0;
+	num_selected = 0;
+	num_selections = 0;
+	select_generation = 0;
+	last_type = DS_MATCHTYPE_NONE;
+
+	if (getdevs(s1) == -1)
+		errx(1, "%s", devstat_errbuf);
+
+	num_devices = s1->dinfo->numdevs;
+	generation = s1->dinfo->generation;
+
+	dev_select = NULL;
+
+	/*
+	 * At this point, selectdevs will almost surely indicate that the
+	 * device list has changed, so we don't look for return values of 0
+	 * or 1.  If we get back -1, though, there is an error.
+	 */
+	if (selectdevs(&dev_select, &num_selected, &num_selections,
+		       &select_generation, generation, s1->dinfo->devices,
+		       num_devices, NULL, 0, NULL, 0, DS_SELECT_ADD,
+		       maxshowdevs, 0) == -1)
+		errx(1, "%s", devstat_errbuf);
+
+	return(1);
+}
+
+static void
+dinfo(dn, lc, now, then)
+     int dn, lc;
+     struct statinfo *now, *then;
+{
+    long double transfers_per_second;
+    long double kb_per_transfer, mb_per_second;
+    long double elapsed_time, device_busy;
+    int di;
+
+    di = dev_select[dn].position;
+
+    elapsed_time = devstat_compute_etime(now->busy_time,
+	 then ? then->busy_time : now->dinfo->devices[di].dev_creation_time);
+
+    device_busy =  devstat_compute_etime(now->dinfo->devices[di].busy_time,
+			 then ? then->dinfo->devices[di].busy_time :
+			 now->dinfo->devices[di].dev_creation_time);
+
+    if ((device_busy == 0) && (transfers_per_second > 5))
+	/* the device has been 100% busy, fake it because               
+	 * as long as the device is 100% busy the busy_time             
+	 * field in the devstat struct is not updated */
+	device_busy = elapsed_time;
+    if (device_busy > elapsed_time)
+	/* this normally happens after one or more periods              
+	 * where the device has been 100% busy, correct it */
+	device_busy = elapsed_time;
+
+    /*
+    putlongdouble(kb_per_transfer, DISKROW + 1, lc, 5, 2, 0);
+    putlongdouble(transfers_per_second, DISKROW + 2, lc, 5, 0, 0);
+    putlongdouble(mb_per_second, DISKROW + 3, lc, 5, 2, 0);
+    putlongdouble(device_busy * 100 / elapsed_time, DISKROW + 4, lc, 5, 0,  0);
+    */
+}
+
+#endif