diff --git a/vmstat.8 b/vmstat.8
index fa0938c..fd1078f 100644
--- a/vmstat.8
+++ b/vmstat.8
@@ -87,6 +87,9 @@ Display version information and exit.
.TP
\fB\-h\fR, \fB\-\-help\fR
Display help and exit.
+.TP
+\fB\-y\fR, \fB\-\-no-first\fR
+Omits first report with statistics since system boot.
.PD
.SH "FIELD DESCRIPTION FOR VM MODE"
.SS
diff --git a/vmstat.c b/vmstat.c
index f2aa2f4..07496cd 100644
--- a/vmstat.c
+++ b/vmstat.c
@@ -75,6 +75,9 @@ static int a_option;
/* "-w" means "wide output" */
static int w_option;
+/* "-y" means "skip first output" */
+static int y_option;
+
/* "-t" means "show timestamp" */
static int t_option;
@@ -104,6 +107,7 @@ static void __attribute__ ((__noreturn__))
fputs(_(" -S, --unit <char> define display unit\n"), out);
fputs(_(" -w, --wide wide output\n"), out);
fputs(_(" -t, --timestamp show timestamp\n"), out);
+ fputs(_(" -y, --no-first skips first line of output\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
@@ -304,43 +308,47 @@ static void new_format(void)
cpu_zzz, pgpgin, pgpgout, pswpin, pswpout, intr, ctxt, &running,
&blocked, &dummy_1, &dummy_2);
- if (t_option) {
- (void) time( &the_time );
- tm_ptr = localtime( &the_time );
- strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S", tm_ptr);
- }
+ if (y_option == 0) {
+ if (t_option) {
+ (void) time( &the_time );
+ tm_ptr = localtime( &the_time );
+ strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S", tm_ptr);
+ }
- duse = *cpu_use + *cpu_nic;
- dsys = *cpu_sys + *cpu_xxx + *cpu_yyy;
- didl = *cpu_idl;
- diow = *cpu_iow;
- dstl = *cpu_zzz;
- Div = duse + dsys + didl + diow + dstl;
- if (!Div) Div = 1, didl = 1;
- divo2 = Div / 2UL;
- printf(w_option ? wide_format : format,
- running, blocked,
- unitConvert(kb_swap_used), unitConvert(kb_main_free),
- unitConvert(a_option?kb_inactive:kb_main_buffers),
- unitConvert(a_option?kb_active:kb_main_cached),
- (unsigned)( (unitConvert(*pswpin * kb_per_page) * hz + divo2) / Div ),
- (unsigned)( (unitConvert(*pswpout * kb_per_page) * hz + divo2) / Div ),
- (unsigned)( (*pgpgin * hz + divo2) / Div ),
- (unsigned)( (*pgpgout * hz + divo2) / Div ),
- (unsigned)( (*intr * hz + divo2) / Div ),
- (unsigned)( (*ctxt * hz + divo2) / Div ),
- (unsigned)( (100*duse + divo2) / Div ),
- (unsigned)( (100*dsys + divo2) / Div ),
- (unsigned)( (100*didl + divo2) / Div ),
- (unsigned)( (100*diow + divo2) / Div ),
- (unsigned)( (100*dstl + divo2) / Div )
- );
+ duse = *cpu_use + *cpu_nic;
+ dsys = *cpu_sys + *cpu_xxx + *cpu_yyy;
+ didl = *cpu_idl;
+ diow = *cpu_iow;
+ dstl = *cpu_zzz;
+ Div = duse + dsys + didl + diow + dstl;
+ if (!Div) Div = 1, didl = 1;
+ divo2 = Div / 2UL;
+ printf(w_option ? wide_format : format,
+ running, blocked,
+ unitConvert(kb_swap_used), unitConvert(kb_main_free),
+ unitConvert(a_option?kb_inactive:kb_main_buffers),
+ unitConvert(a_option?kb_active:kb_main_cached),
+ (unsigned)( (unitConvert(*pswpin * kb_per_page) * hz + divo2) / Div ),
+ (unsigned)( (unitConvert(*pswpout * kb_per_page) * hz + divo2) / Div ),
+ (unsigned)( (*pgpgin * hz + divo2) / Div ),
+ (unsigned)( (*pgpgout * hz + divo2) / Div ),
+ (unsigned)( (*intr * hz + divo2) / Div ),
+ (unsigned)( (*ctxt * hz + divo2) / Div ),
+ (unsigned)( (100*duse + divo2) / Div ),
+ (unsigned)( (100*dsys + divo2) / Div ),
+ (unsigned)( (100*didl + divo2) / Div ),
+ (unsigned)( (100*diow + divo2) / Div ),
+ (unsigned)( (100*dstl + divo2) / Div )
+ );
- if (t_option) {
- printf(" %s", timebuf);
- }
+ if (t_option) {
+ printf(" %s", timebuf);
+ }
- printf("\n");
+ printf("\n");
+ }
+ else
+ num_updates++;
/* main loop */
for (i = 1; infinite_updates || i < num_updates; i++) {
@@ -865,6 +873,7 @@ int main(int argc, char *argv[])
{"timestamp", no_argument, NULL, 't'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
+ {"no-first", no_argument, NULL, 'y'},
{NULL, 0, NULL, 0}
};
@@ -877,7 +886,7 @@ int main(int argc, char *argv[])
atexit(close_stdout);
while ((c =
- getopt_long(argc, argv, "afmnsdDp:S:wthV", longopts,
+ getopt_long(argc, argv, "afmnsdDp:S:wthVy", longopts,
NULL)) != EOF)
switch (c) {
case 'V':
@@ -946,6 +955,11 @@ int main(int argc, char *argv[])
case 't':
t_option = 1;
break;
+ case 'y':
+ /* Don't display stats since system restart */
+ y_option = 1;
+ break;
+
default:
/* no other aguments defined yet. */
usage(stderr);