ref: 83c7a727e05c7280a457bcdf5681f73ce225e0ea
dir: /rc/bin/E/
#!/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 ''