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diff --git a/sbopkglint.d/30-manpages.t.sh b/sbopkglint.d/30-manpages.t.sh
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+++ b/sbopkglint.d/30-manpages.t.sh
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+#!/bin/sh
+
+# sbopkglint test, must be sourced by sbopkglint (not run standalone).
+
+# PKG, PRGNAM, VERSION, ARCH are set by sbopkglint. also the current
+# directory is the root of the installed package tree.
+
+#######################################################################
+# if the package contains the usr/man dir, make sure that:
+# all the dirs match usr/man/man[1-9n] or usr/man/<locale>/man[1-9n].
+# all the files under /usr/man are gzipped and end in <section>.gz.
+# all the files under /usr/man have mode 0644. executable man pages
+# don't make sense, and man pages that aren't world-readable are
+# annoying and wrong.
+# all the filenames match the sections (e.g. usr/man/man1/foo.1.gz
+# matches, usr/man/man1/bar.2.gz doesn't).
+# all the gzipped files look like they contain *roff.
+
+BADPERMS=""
+BADDIRPERMS=""
+BADDIRS=""
+BADNAMES=""
+NOTGZIPPED=""
+NONTROFF=""
+WRONGSECT=""
+
+check_gzipped_page() {
+	local f="$1"
+	local d="$( dirname $f )"
+	local s="$( stat -c '%a %U %G' "$f" )"
+
+	if [ "$s" = "444 root root" ]; then
+		: # we could warn here someday
+	elif [ "$s" != "644 root root" ]; then
+		BADPERMS+="$f "
+	fi
+
+	if [ "$( file -L -b --mime-type "$f" )" != "application/gzip" ]; then
+		NOTGZIPPED+="$f "
+	fi
+
+	# I have ~42,000 man pages on my dev box, file(1) fails to identify
+	# 12 of them as troff, but adding the check for .T catches them all.
+	if [ "$( file -z -m /etc/file/magic/troff -L -b --mime-type "$f" )" != "text/troff" ]; then
+		if ! zgrep -q '^\.T' "$f"; then
+			NONTROFF+="$f "
+		fi
+	fi
+
+	# checking the section is tricky because e.g. /usr/man/man1 may contain
+	# files with with names like .1.gz, .1x.gz, .1.pm.gz.
+
+	# if the section in the directory name is bad, don't complain here, it
+	# was already reported.
+	dir_s="$( echo "$d" | sed -n 's,.*man\([0-9n]\)$,\1,p' )"
+	if [ "$dir_s" = "" ]; then
+		return
+	fi
+
+	s="$( basename "$f" | sed -n 's,.*\.\([0-9n]\)[^.]*\.gz,\1,p' )"
+	if [ "$s" = "" ]; then
+		BADNAMES+="$f "
+	elif [ "$s" != "$dir_s" ]; then
+		WRONGSECT+="$f "
+	fi
+}
+
+# called for paths like /usr/man/de. right now, it accepts names like
+# xx_XX or xx.UTF-8, or actually anything whose first 2 characters match
+# one of the dirs in /usr/share/locale. could use some refining. I don't
+# even know if the *.UTF-8 or *.ISO8859-1 dirs get searched by man-db.
+# Note that slackware's own libcdio-paranoia install man pages in
+# /usr/man/jp, which is invalid.
+check_locale_dir() {
+	l="$( echo "$1" | sed 's,^.*/\(..\).*$,\1,' )"
+	[ -e /usr/share/locale/"$l" ] || warn "bad locale dir in /usr/man: $l"
+}
+
+if [ -d usr/man ]; then
+	find usr/man -type f > .manpages.$$
+	find usr/man -mindepth 1 -type d > .mandirs.$$
+
+	while read d; do
+		case "$d" in
+			usr/man/man[1-9n]|usr/man/*/man[1-9n])
+				[ "$( stat -c '%a %U %G' "$d" )" != "755 root root" ] && BADDIRPERMS+="$d "
+				;;
+			usr/man/??*) check_locale_dir "$d" ;;
+			*) BADDIRS+="$d " ;;
+		esac
+	done < .mandirs.$$
+
+	while read f; do
+		case "$f" in
+			*.gz) check_gzipped_page "$f" ;;
+			*) BADNAMES+="$f " ;;
+		esac
+	done < .manpages.$$
+
+	rm -f .manpages.$$ .mandirs.$$
+
+	[ -n "$BADPERMS" ] && warn "bad man page owner/permissions (should be 0644, root:root)" && ls -ld $BADPERMS
+	[ -n "$BADDIRPERMS" ] && warn "bad man directory owner/permissions (should be 0755, root:root)" && ls -ld $BADDIRPERMS
+	[ -n "$BADDIRS" ] && warn "bad directory names in /usr/man:" && ls -ld $BADDIRS
+	[ -n "$BADNAMES" ] && warn "bad man page names (not *.gz):" && ls -ld $BADNAMES
+	[ -n "$NOTGZIPPED" ] && warn "non-gzip (but named *.gz) man pages:" && ls -ld $NOTGZIPPED
+	[ -n "$NONTROFF" ] && warn "invalid man pages (not troff):" && ls -ld $NONTROFF
+	[ -n "$WRONGSECT" ] && warn "man pages in wrong section:" && ls -ld $WRONGSECT
+fi
+