From eee28e7b5851a6eb16f7969393d8c6292b1f8754 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Thu, 3 May 2018 15:09:14 -0700
Subject: Support fractional seconds (and other time units) in `top -d`.

LTP uses `top -d 0.1`, which isn't convincingly useful, but general
support for other time units might be useful, and switching to xparsetime
addresses both at once.

Also fix 3169d948c049664bcf7216d4c4ae751881099d3e where I mistakenly
treated `rev` and `toys.optflags&FLAG_b` as interchangeable. (Without
this second fix, `top -b` looks fine but `top` is broken!)

Also fix xparsetime to reject input such as "monkey" or "1monkey".
---
 toys/posix/ps.c | 23 +++++++++++++++--------
 1 file changed, 15 insertions(+), 8 deletions(-)

(limited to 'toys')

diff --git a/toys/posix/ps.c b/toys/posix/ps.c
index c5c0f790..c5d487f5 100644
--- a/toys/posix/ps.c
+++ b/toys/posix/ps.c
@@ -48,8 +48,8 @@ USE_PS(NEWTOY(ps, "k(sort)*P(ppid)*aAdeflMno*O*p(pid)*s*t*Tu*U*g*G*wZ[!ol][+Ae][
 // stayroot because iotop needs root to read other process' proc/$$/io
 // TOP and IOTOP have a large common option block used for common processing,
 // the default values are different but the flags are in the same order.
-USE_TOP(NEWTOY(top, ">0O*" "Hk*o*p*u*s#<1d#=3<1m#n#<1bq[!oO]", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
-USE_IOTOP(NEWTOY(iotop, ">0AaKO" "Hk*o*p*u*s#<1=7d#=3<1m#n#<1bq", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_STAYROOT|TOYFLAG_LOCALE))
+USE_TOP(NEWTOY(top, ">0O*" "Hk*o*p*u*s#<1d:m#n#<1bq[!oO]", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_LOCALE))
+USE_IOTOP(NEWTOY(iotop, ">0AaKO" "Hk*o*p*u*s#<1=7d:m#n#<1bq", TOYFLAG_USR|TOYFLAG_BIN|TOYFLAG_STAYROOT|TOYFLAG_LOCALE))
 USE_PGREP(NEWTOY(pgrep, "?cld:u*U*t*s*P*g*G*fnovxL:[-no]", TOYFLAG_USR|TOYFLAG_BIN))
 USE_PKILL(NEWTOY(pkill,    "?Vu*U*t*s*P*g*G*fnovxl:[-no]", TOYFLAG_USR|TOYFLAG_BIN))
 
@@ -249,13 +249,15 @@ GLOBALS(
     struct {
       long n;
       long m;
-      long d;
+      char *d;
       long s;
       struct arg_list *u;
       struct arg_list *p;
       struct arg_list *o;
       struct arg_list *k;
       struct arg_list *O;
+
+      long d_ms;
     } top;
     struct {
       char *L;
@@ -1359,9 +1361,9 @@ static int header_line(int line, int rev)
 
   if (toys.optflags&FLAG_b) rev = 0;
 
-  printf("%s%*.*s%s\n", rev ? "\033[7m" : "",
+  printf("%s%*.*s%s%s\n", rev ? "\033[7m" : "",
     (toys.optflags&FLAG_b) ? 0 : -TT.width, TT.width, toybuf,
-    rev ? "\033[0m\r" : "");
+    rev ? "\033[0m" : "", (toys.optflags&FLAG_b) ? "" : "\r");
 
   return line-1;
 }
@@ -1566,8 +1568,8 @@ static void top_common(
       }
 
       now = millitime();
-      if (timeout<=now) timeout = new.whence+TT.top.d;
-      if (timeout<=now || timeout>now+TT.top.d) timeout = now+TT.top.d;
+      if (timeout<=now) timeout = new.whence+TT.top.d_ms;
+      if (timeout<=now || timeout>now+TT.top.d_ms) timeout = now+TT.top.d_ms;
 
       // In batch mode, we ignore the keyboard.
       if (toys.optflags&FLAG_b) {
@@ -1621,7 +1623,12 @@ static void top_common(
 
 static void top_setup(char *defo, char *defk)
 {
-  TT.top.d *= 1000;
+  if (TT.top.d) {
+    long frac;
+
+    TT.top.d_ms = xparsetime(TT.top.d, 1000, &frac) * 1000;
+    TT.top.d_ms += frac;
+  } else TT.top.d_ms = 3000;
 
   TT.ticks = sysconf(_SC_CLK_TCK); // units for starttime/uptime
   TT.tty = tty_fd() != -1;
-- 
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