Plan 9 from Bell Labs’s /usr/web/sources/patch/applied/install-restructurised/watchfd.orig

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
Download the Plan 9 distribution.


#!/bin/rc

p=`{ps | grep $1 | sed 's/[^ ]* +([^ ]+) .*/\1/' }
while(! ~ $#p 1) {
	sleep 1
	p=`{ps | grep $1 | sed 's/[^ ]* +([^ ]+) .*/\1/'}
}
p=$p(1)

{
	while(test -f /proc/$p/fd)
		grep '^ *'^$2^' ' /proc/$p/fd >[2]/dev/null
} | awk '{print $9 " '^$3^'"; fflush("/dev/stdout")}' | bargraph -w 145,129,445,168 $4

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