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#!/usr/bin/sh
#
# smistrip --
#
# Extract MIB and PIB modules from text files, like RFCs or I-Ds.
#
# Copyright (c) 1999 Frank Strauss, Technical University of Braunschweig.
#
# See the file "COPYING" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# $Id: smistrip.in 3434 2006-04-07 07:02:51Z strauss $
#
# NOTE, that this script relies on awk (tested with GNU awk) and getopts
# (shell builtin like in bash or standalone).
#
AWK=/usr/bin/awk
GETOPTS=getopts
VERSION=0.4.8
do_version () {
echo "smistrip $VERSION"
}
do_usage () {
echo "Usage: smistrip [-Vhn] [-i dir] [-d dir] [-m module] file1 [file2 [...]]"
echo "-V show version and license information"
echo "-h show usage information"
echo "-n do not write module files"
echo "-i dir try to read files from directory dir"
echo "-d dir write module to directory dir"
echo "-m module strip only the specified module"
echo "file1 ... input files to parse (RFCs, I-Ds, ...)"
}
do_strip () {
if [ "$indir" ] ; then
FILE="$indir/$1"
else
FILE="$1"
fi
if [ ! -f "$FILE" -a -f "$FILE.gz" ] ; then
FILE="$FILE.gz"
fi
echo "$FILE" | grep -q '\.gz$'
if [ $? -ne 0 ] ; then
CMD=cat
else
CMD=zcat
fi
$CMD "$FILE" | \
tr -d '\015' | \
grep -i -v '^[ ]*Internet[ \-]Draft' | \
$AWK -vtest="$test" -vdir="$dir" -vsingle="$single" '
# start of module
/^[ \t]*[A-Za-z0-9-]* *(PIB-)?DEFINITIONS *(::=)? *(BEGIN)? *$/ {
module = $1
skip = 9
skipped = -1
macro = 0
n = 0
}
# process each line
{
# at the end of a page we go back one line (which is expected to
# be a separator line), and start the counter skipped to skip the
# next few lines.
if ($0 ~ /\[[pP]age [iv0-9]*\] */) {
# some drafts do not use that separator line. so keep it if
# there are non-blank characters.
if (!(line[n] ~ /^[ \t]*$/)) { print "WARNING: the line ::"line[n]":: should be a separator before a page break. It was kept. " ; n-- }
skipped = 0
}
# if we are skipping...
if (skipped >= 0) {
skipped++
# if we have skipped enough lines to the top of the next page...
if (skipped >= skip) {
skipped = -1
} else {
# finish skipping, if we find a non-empty line, but not before
# we have skipped four lines. remember the miminum of lines
# we have ever skipped to keep empty lines in a modules that
# appear near the top of a page.
if ((skipped >= 4) && ($0 ~ /[^ \t]/)) {
if (skipped < skip) { skip = skipped }
skipped = -1
}
}
}
# so, if we are not skipping and inside a module, remember the line.
if ((skipped == -1) && (length(module) > 0)) {
line[n++] = $0
}
}
# remember when we enter a macro definition
/^[ \t]*[A-Za-z0-9-]* *MACRO *::=/ {
macro = 1
}
# end of module
/^[ \t]*END[ \t]*$/ {
if (macro == 0) {
if ((length(single) == 0) || (single == module)) {
strip = 99
for (i=0 ; i < n ; i++) {
# find the minimum column that contains non-blank characters
# in order to cut a blank prefix off. Ignore lines that only
# contain white spaces.
if (!(line[i] ~ /^[ \t]*$/)) {
p = match(line[i], "[^ ]")
if ((p < strip) && (length(line[i]) > p)) { strip = p }
}
}
if (test != "1") {
if (dir) {
f = dir"/"module
} else {
f = module
}
for (i=0 ; i < n ; i++) {
print substr(line[i], strip) >f
}
}
print module ": " n " lines."
}
module = ""
} else {
macro = 0
}
}
'
}
while $GETOPTS Vhnm:i:d: c ; do
case $c in
n) test=1
;;
m) single=$OPTARG
;;
i) indir=$OPTARG
;;
d) dir=$OPTARG
;;
h) do_usage
exit 0
;;
V) do_version
exit 0
;;
*) do_usage
exit 1
;;
esac
done
shift `expr $OPTIND - 1`
if [ $# -eq 0 ] ; then
do_strip -
else
for f in "$@" ; do
do_strip "$f"
done
fi
exit 0
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