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authorDenys Vlasenko2016-03-15 17:54:17 +0100
committerDenys Vlasenko2016-03-15 17:54:17 +0100
commit0d1b71e8e61491cf50fc3a21ec0a412f6dca4d56 (patch)
tree327b1e1f7803e7b6d8dffa39635078ae7895bf27 /procps/nmeter.c
parent41b1e2c39238ef1f333588b9a857e5af806bd157 (diff)
downloadbusybox-0d1b71e8e61491cf50fc3a21ec0a412f6dca4d56.zip
busybox-0d1b71e8e61491cf50fc3a21ec0a412f6dca4d56.tar.gz
nmeter: reinstate and document -d-1
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'procps/nmeter.c')
-rw-r--r--procps/nmeter.c32
1 files changed, 15 insertions, 17 deletions
diff --git a/procps/nmeter.c b/procps/nmeter.c
index d6c46c6..33de379 100644
--- a/procps/nmeter.c
+++ b/procps/nmeter.c
@@ -21,7 +21,7 @@
//usage:#define nmeter_full_usage "\n\n"
//usage: "Monitor system in real time"
//usage: "\n"
-//usage: "\n -d MSEC Milliseconds between updates (default:1000)"
+//usage: "\n -d MSEC Milliseconds between updates, default:1000, none:-1"
//usage: "\n"
//usage: "\nFormat specifiers:"
//usage: "\n %Nc or %[cN] CPU. N - bar size (default:10)"
@@ -86,7 +86,7 @@ struct globals {
char final_char;
char *cur_outbuf;
int delta;
- int deltanz;
+ unsigned deltanz;
struct timeval tv;
#define first_proc_file proc_stat
proc_file proc_stat; // Must match the order of proc_name's!
@@ -101,8 +101,6 @@ struct globals {
#define is26 (G.is26 )
#define need_seconds (G.need_seconds )
#define cur_outbuf (G.cur_outbuf )
-#define delta (G.delta )
-#define deltanz (G.deltanz )
#define tv (G.tv )
#define proc_stat (G.proc_stat )
#define proc_loadavg (G.proc_loadavg )
@@ -114,7 +112,7 @@ struct globals {
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
cur_outbuf = outbuf; \
G.final_char = '\n'; \
- deltanz = delta = 1000000; \
+ G.deltanz = G.delta = 1000000; \
} while (0)
// We depend on this being a char[], not char* - we take sizeof() of it
@@ -844,9 +842,9 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
}
if (getopt32(argv, "d:", &opt_d)) {
- delta = xatou(opt_d) * 1000;
- deltanz = delta > 0 ? delta : 1;
- need_seconds = (1000000 % deltanz) != 0;
+ G.delta = xatoi(opt_d) * 1000;
+ G.deltanz = G.delta > 0 ? G.delta : 1;
+ need_seconds = (1000000 % G.deltanz) != 0;
}
argv += optind;
@@ -902,8 +900,8 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
last->next = s;
last = s;
} else {
- // %NNNNd or %r option. remove it from string
- strcpy(prev + strlen(prev), cur);
+ // %r option. remove it from string
+ overlapping_strcpy(prev + strlen(prev), cur);
cur = prev;
}
}
@@ -921,9 +919,9 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
// Generate first samples but do not print them, they're bogus
collect_info(first);
reset_outbuf();
- if (delta >= 0) {
+ if (G.delta >= 0) {
gettimeofday(&tv, NULL);
- usleep(delta > 1000000 ? 1000000 : delta - tv.tv_usec%deltanz);
+ usleep(G.delta > 1000000 ? 1000000 : G.delta - tv.tv_usec % G.deltanz);
}
while (1) {
@@ -937,18 +935,18 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
// time resolution ;)
// TODO: detect and avoid useless updates
// (like: nothing happens except time)
- if (delta >= 0) {
+ if (G.delta >= 0) {
int rem;
// can be commented out, will sacrifice sleep time precision a bit
gettimeofday(&tv, NULL);
if (need_seconds)
- rem = delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % deltanz;
+ rem = G.delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % G.deltanz;
else
- rem = delta - tv.tv_usec%deltanz;
+ rem = G.delta - (unsigned)tv.tv_usec % G.deltanz;
// Sometimes kernel wakes us up just a tiny bit earlier than asked
// Do not go to very short sleep in this case
- if (rem < delta/128) {
- rem += delta;
+ if (rem < (unsigned)G.delta / 128) {
+ rem += G.delta;
}
usleep(rem);
}