is_able.chk

:
#
#  is_able.chk
#
#   This shell script checks the permissions of all files and directories
# listed in the configuration file "is_able.lst", and prints warning messages
# according to the status of files.  You can specify world or group readability
# or writeability.  See the config file for the format of the configuration
# file.
#
#   Mechanism:  This shell script parses each line from the configure file,
# changes into the directory the file is in, and then uses the "is_able" 
# program to check if any of the directories in question are writable by 
# world/group.  All results are written to standard output.
#
TEST=/bin/test
ECHO=/bin/echo
AWK=/bin/awk
SED=/bin/sed

config_file=is_able.lst

# where the test is run:
old_dir=`pwd`

if $TEST ! -f "$config_file" ; then
	$ECHO "Config file $config_file doesn't exist!"
	exit
	fi

#  Read from $dir_list (e.g. "is.chk.lst") what files/dirs to check.
#
# Comments are lines starting with a "#".
#
# /path/to/{dir|file}   World/Group     Read/Write/Both
# as above              {W|w|G|g}       {R|r|W|w|B|b}
#
$AWK '/^#/ {
	next;}
	{ world=group=read=write=both=0; \
	# need 3 fields, or format error
	if (NF != 3) next; \
	if ($2 != "W" && $2 != "w" && $2 != "G" && $2 != "g") next; \
	if ($3!="R"&&$3!="r"&&$3!="W"&&$3!="w"&&$3!="B"&&$3!="b") next; \
	for (f=1;f < NF; f++) printf("%s ", $f); \
	print $NF;
	}' $config_file |
while read targets
	do
	#   Use sed, 'cause awk lets me down (line too long) -- then realize
	# I should have used sed anyway.  Lazy bum.
	foo=`echo "$targets" | $SED 's/\(.*\)....$/\1/'`
	args=`echo "$targets" | $SED 's/.*\(...\)$/\1/'`

	#  I added this, to change into the directory before checking
	# for writability; the reason?  With long dir pathnames that had
	# lots of files inside, the shell would blow up, trying to expand
	# all the full paths, and stuff it into a single variable.  For
	# instance, a line like this in $config_file:
	#
	#  /usr/foo/bar/cowabunga/* w w
	#
	#  Would expand to "/usr/foo/bar/cowabunga/ls /usr/..."  Need full
	# pathnames, tho!  And it can still blow up, tho it's tougher.
	#
	dir=`echo "$targets" | $SED 's/\(.*\\)\/[^ ]* .*$/\1/'`

	if $TEST -n "$dir" -a -d "$dir" ; then
		cd $dir
		fi

	for f in $foo
		do
#		echo $dir $f $args
		$old_dir/is_able $f $args
		done
	cd $old_dir
	done

# end of script