[net.sources] shell script to find how many subscribe to each newsgroup

fred@umcp-cs.UUCP (10/04/83)

##### The rest of this news item is a shell script. Execute     #####
##### it to extract the new shell script and its documentation. #####
: Run this shell script with "sh" not "csh"
PATH=:/bin:/usr/bin:/usr/ucb
export PATH
all=FALSE
if [ $1x = -ax ]; then
	all=TRUE
fi
/bin/echo 'Extracting subscribers'
sed 's/^X//' <<'//go.sysin dd *' >subscribers
#! /bin/sh
#
# @(#)subscribers.sh	(University of Maryland) Fred Blonder 19-Aug-1983
#
# Find out how many people subscribe to each newsgroup

sub_tmp=/tmp/#s.$$

trap "rm -f $sub_tmp" 0 1 2 15

for dir in `awk -F: '{ print $6 }' /etc/passwd | sort -u`
do	# locate all login directories
	if	# if .newsrc exists
		[ -r $dir/.newsrc ]
	then	# find all newsgroups subscribed to, append to $sub_tmp
		awk -F: '/^net\..*: [0-9].*$/ { print $1 }' \
			$dir/.newsrc >> $sub_tmp
	fi
done

# Count all ocurrences of all newsgroups.
# Print result sorted by decreasing number of subscribers.
awk '{ x[$1] = x[$1] + 1 } \
	END { for (i in x) print i " " x[i] }' $sub_tmp | sort +1 -rn

//go.sysin dd *
made=TRUE
if [ $made = TRUE ]; then
	/bin/chmod 555 subscribers
	/bin/echo -n '	'; /bin/ls -ld subscribers
fi
/bin/echo 'Extracting subscribers.6l'
sed 's/^X//' <<'//go.sysin dd *' >subscribers.6l
X.TH SUBSCRIBERS 6L "3-Oct-83 (U of Maryland)"
X.SH NAME
subscribers \- list how many people subscribe to each newsgroup
X.SH SYNOPSIS
X.I subscribers
X.SH DESCRIPTION
X.I Subscribers
is a short shell script which looks into the password file, and everyone's
$HOME/.newsrc file, to find out how many people subscribe to each newsgroup.
The resulting list is written to the standard output as a series of lines of
the form:
X.sp
X.ti +10
newsgroupname number-of-subscribers
X.sp
sorted by decreasing number of subscribers.
X.SH AUTHOR
Fred Blonder <fred@umcp-cs>
X.SH FILES
X.in +15
X.ti -15
X/etc/passwd \- to find all login directories.
X.br
X.ti -15
$HOME/.newsrc \- (for each entry in /etc/passwd) to find each individual
user's subscription list
X.in -15
X.SH "SEE ALSO"
readnews(1), news(5)
X.SH DIAGNOSTICS
None.
X.SH BUGS
Doesn't take into account multiple accounts using the same login directory,
or people who change their $HOME directory.
//go.sysin dd *
made=TRUE
if [ $made = TRUE ]; then
	/bin/chmod 444 subscribers.6l
	/bin/echo -n '	'; /bin/ls -ld subscribers.6l
fi