shithub: snippets

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add watch

--- a/README.md

+++ b/README.md

@@ -1,7 +1,8 @@

 # Snippets

-Random snippets of code that are in public domain.

-Just copy and use for whatever you want.

+Random snippets of code and scripts that are in public domain.  Just

+copy and use for whatever you want.  Except for doing any kind of

+harm.

 * `c_builtins*` a few __builtin_* for Plan 9, useful for porting other software

 * `lrint.c` lrint* implementation

@@ -9,3 +10,5 @@

 * `nanosec.c` nanosec(), a replacement for (way more expensive) nsec()

 * `qt.[ch]` [QP tries](https://dotat.at/prog/qp/README.html)

 * `xml.[ch]` XML parser, works as a streaming parser as well

+

+* `watch` watch-like tool, imagine

--- /dev/null

+++ b/watch

@@ -1,0 +1,12 @@

+#!/bin/rc

+# calls a command every second, replacing its output with the new one

+

+rfork ne

+a0=''

+while(){

+	a=`"{$*}

+	echo -n $a0 | tr -c '' '\x08'

+	echo -n $a

+	a0=$a

+	sleep 1

+}