@@ -0,0 +1,16 @@
+#!/bin/rc
+# E file - B file, wait until it changes, exit
+rfork e
+if (! ~ $#* 1) {
+ echo usage: $0 file >[1=2]
+ exit usage
+}
+if (! test -e $1) {
+ echo $0: $1: no such file >[1=2]
+ exit no-file
+otm = `{mtime $1 | awk '{print $1}'}
+B $1
+while (~ $otm `{mtime $1 | awk '{print $1}'})
+ sleep 1
+exit ''
@@ -11,3 +11,6 @@ of each
.IR file .
.SH SOURCE
.B /sys/src/cmd/mtime.c
+.SH SEE ALSO
+.IR du (1),
+.IR seconds (1)