1 files changed, 78 insertions, 0 deletions
diff --git a/gnu/usr.bin/groff/grog/grog.sh b/gnu/usr.bin/groff/grog/grog.sh
new file mode 100644
index 0000000..755c891
--- /dev/null
+++ b/gnu/usr.bin/groff/grog/grog.sh
@@ -0,0 +1,78 @@
+#!/bin/sh
+# grog -- guess options for groff command
+# Like doctype in Kernighan & Pike, Unix Programming Environment, pp 306-8.
+
+soelim=gsoelim
+
+opts=
+
+for arg
+do
+	case "$arg" in
+	--)
+		shift; break;;
+	-)
+		break;;
+	-*)
+		opts="$opts $arg"; shift;;
+	*)
+		break;;
+	esac
+done
+
+egrep -h '^\.(P|[LI]P|[pnil]p|sh|Dd|Tp|Dp|De|Cx|Cl|Oo|Oc|TS|EQ|TH|SH|so|\[|R1|PH|SA)' $* \
+| sed -e '/^\.so/s/^.*$/.SO_START\
+&\
+.SO_END/' \
+| $soelim \
+| egrep '^\.(P|[LI]P|[pnil]p|sh|Dd|Tp|Dp|De|Cx|Cl|Oo|Oc|TS|EQ|TH|SH|\[|R1|PH|SA|SO_START|SO_END)' \
+| awk '
+/^\.SO_START$/ { so = 1 }
+/^\.SO_END$/ { so = 0 }
+/^\.TS/ { tbl++; if (so > 0) soelim++ }
+/^\.PS([ 0-9.<].*)?$/ { pic++; if (so > 0) soelim++ }
+/^\.EQ/ { eqn++; if (so > 0) soelim++ }
+/^\.(R1|\[)/ { refer++; if (so > 0) soelim++ }
+/^\.TH/ { TH++ }
+/^\.[PLI]P/ { PP++ }
+/^\.P$/ { P++ }
+/^\.SH/ { SH++ }
+/^\.(PH|SA)/ { mm++ }
+/^\.([pnil]p|sh)/ { me++ }
+/^\.Dd/ { mdoc++ }
+/^\.(Tp|Dp|De|Cx|Cl)/ { mdoc_old++ }
+/^\.Oo/ { Oo++ }
+/^\.Oc/ { Oo-- }
+
+END {
+	if (files ~ /^-/)
+		files = "-- " files
+	printf "groff"
+	if (pic > 0 || tbl > 0 || eqn > 0 || refer > 0) {
+		printf " -"
+		if (soelim > 0) printf "s"
+		if (refer > 0) printf "R"
+		if (pic > 0) printf "p"
+		if (tbl > 0) printf "t"
+		if (eqn > 0) printf "e"
+	}
+	if (me > 0)
+		printf " -me"
+	else if (SH > 0 && TH > 0)
+		printf " -man"
+	else if (PP > 0)
+		printf " -ms"
+	else if (P > 0 || mm > 0)
+		printf " -mm"
+	else if (mdoc > 0) {
+		if (mdoc_old > 0 || Oo > 0)
+			printf " -mdoc.old"
+		else
+			printf " -mdoc"
+	}
+	if (opts != "")
+		printf "%s", opts
+	if (files != "")
+		printf " %s", files
+	print
+}' "opts=$opts" "files=$*" -