nmeter: deprecate %NNNd specified, use -d MSEC instead

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

1 files changed, 45 insertions, 5 deletions

diff --git a/procps/nmeter.c b/procps/nmeter.c
index 7836a90d5..ac019eb53 100644
--- a/procps/nmeter.c
+++ b/procps/nmeter.c
@@ -6,6 +6,40 @@
  * Contact me: vda.linux@googlemail.com
  */
 
+//config:config NMETER
+//config:       bool "nmeter"
+//config:       default y
+//config:       help
+//config:         Prints selected system stats continuously, one line per update.
+
+//applet:IF_NMETER(APPLET(nmeter, _BB_DIR_USR_BIN, _BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_NMETER) += nmeter.o
+
+//usage:#define nmeter_trivial_usage
+//usage:       "[-d MSEC] FORMAT_STRING"
+//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"
+//usage:     "\nFormat specifiers:"
+//usage:     "\n %Nc or %[cN]   Monitor CPU. N - bar size (default:10)"
+//usage:     "\n                (displays: S:system U:user N:niced D:iowait I:irq i:softirq)"
+//usage:     "\n %[niface]      Monitor network interface 'iface'"
+//usage:     "\n %m             Monitor allocated memory"
+//usage:     "\n %[mf]          Monitor free memory"
+//usage:     "\n %[mt]          Monitor total memory"
+//usage:     "\n %s             Monitor allocated swap"
+//usage:     "\n %f             Monitor number of used file descriptors"
+//usage:     "\n %Ni            Monitor total/specific IRQ rate"
+//usage:     "\n %x             Monitor context switch rate"
+//usage:     "\n %p             Monitor forks"
+//usage:     "\n %[pn]          Monitor # of processes"
+//usage:     "\n %b             Monitor block io"
+//usage:     "\n %Nt            Show time (with N decimal points)"
+//usage:     "\n %r             Print <cr> instead of <lf> at EOL"
+
 //TODO:
 // simplify code
 // /proc/locks
@@ -769,6 +803,7 @@ static void FAST_FUNC collect_info(s_stat *s)
 
 typedef s_stat* init_func(const char *param);
 
+// Deprecated %NNNd is to be removed, -d MSEC supersedes it
 static const char options[] ALIGN1 = "ncmsfixptbdr";
 static init_func *const init_functions[] = {
         init_if,
@@ -792,23 +827,28 @@ int nmeter_main(int argc UNUSED_PARAM, char **argv)
         s_stat *first = NULL;
         s_stat *last = NULL;
         s_stat *s;
+        char *opt_d;
         char *cur, *prev;
 
         INIT_G();
 
         xchdir("/proc");
 
-        if (!argv[1])
-                bb_show_usage();
-
         if (open_read_close("version", buf, sizeof(buf)-1) > 0) {
                 buf[sizeof(buf)-1] = '\0';
                 is26 = (strstr(buf, " 2.4.") == NULL);
         }
 
-        // Can use argv[1] directly, but this will mess up
+        if (getopt32(argv, "d:", &opt_d))
+                init_delay(opt_d);
+        argv += optind;
+
+        if (!argv[0])
+                bb_show_usage();
+
+        // Can use argv[0] directly, but this will mess up
         // parameters as seen by e.g. ps. Making a copy...
-        cur = xstrdup(argv[1]);
+        cur = xstrdup(argv[0]);
         while (1) {
                 char *param, *p;
                 prev = cur;