Tweak help text and comments.

1 files changed, 9 insertions, 9 deletions

diff --git a/toys/other/watch.c b/toys/other/watch.c
index fbd95455..a47aa3c2 100644
--- a/toys/other/watch.c
+++ b/toys/other/watch.c
@@ -1,4 +1,4 @@
-/* watch.c - Execute a program periodically
+/* watch.c - Show bounded output of a periodically executed command.
  *
  * Copyright 2013 Sandeep Sharma <sandeep.jack2756@gmail.com>
  * Copyright 2013 Kyungwan Han <asura321@gmail.com>
@@ -6,21 +6,22 @@
  * No standard. See http://man7.org/linux/man-pages/man1/watch.1.html
  *
  * TODO: trailing combining characters
+
 USE_WATCH(NEWTOY(watch, "^<1n%<100=2000tebx", TOYFLAG_USR|TOYFLAG_BIN))
 
 config WATCH
   bool "watch"
   default y
   help
-    usage: watch [-tebx] [-n SEC] PROG ARGS
+    usage: watch [-tebx] [-n SEC] COMMAND...
 
-    Run PROG every -n seconds, showing output. Hit q to quit.
+    Run COMMAND every -n seconds, showing output that fits terminal, q to quit.
 
-    -n	Loop period in seconds (default 2)
+    -n	Number of seconds between repeats (default 2.0)
     -t	Don't print header
     -e	Exit on error
     -b	Beep on command error
-    -x	Exec command directly (vs "sh -c")
+    -x	Exec command directly (without "sh -c")
 */
 
 #define FOR_watch
@@ -57,7 +58,7 @@ static void watch_child(int sig)
 static int watch_escape(FILE *out, int cols, int wc)
 {
   if (wc==27 || (wc>=7 && wc<=13)) return -1;
-  if (wc < 32) return 0;
+  if (wc<32) return 0;
 
   return crunch_escape(out, cols, wc);
 }
@@ -88,13 +89,12 @@ void watch_main(void)
   xsignal_flags(SIGCHLD, watch_child, SA_RESTART|SA_NOCLDSTOP);
 
   for (;;) {
-    fflush(NULL);
+    fflush(0);
 
     // Time for a new period?
     if ((now = millitime())>=then) {
-
       // Incrementing then instead of adding offset to now avoids drift,
-      // loop is in case we got suspend/resumed and need to skip periods
+      // loop in case we got suspend/resumed and need to skip periods
       while ((then += TT.n)<=now);
       start_redraw(&width, &height);