report lineno while meet the error

Makefile

@@ -1,6 +1,5 @@
 .PHONY: all install test clean
 
-version		= 0.0.0
 prefix		= /usr/local
 exec_prefix	= $(prefix)
 bindir		= $(exec_prefix)/bin
@@ -33,15 +32,18 @@ test: all
 		bname=`basename $${in%%.*}`; \
 		echo running test $${bname}...; \
 		out=testenv/$${bname}.out; \
-		ans=test/$${bname}.out; \
-		<$$in ./shsub >$$out; \
-		diff -u $$ans $$out; \
+		err=testenv/$${bname}.err; \
+		ansout=test/$${bname}.out; \
+		anserr=test/$${bname}.err; \
+		<$$in ./shsub >$$out 2>$$err; \
+		[ -f $$ansout ] && diff -u $$ansout $$out; \
+		[ -f $$anserr ] && diff -u $$anserr $$err; \
 	done; \
 	echo all tests passed
 
-shsub: shsub.sh usage LICENSE
+shsub: shsub.sh usage LICENSE version
 	m4 \
-		-D__version__='$(version)' \
+		-D__version__="`cat version`" \
 		-D__license__="`cat LICENSE`" \
 		-D__usage__="`cat usage`" \
 		shsub.sh > shsub

tc.c

@@ -56,6 +56,7 @@ int cstack[TOKSIZ], cssize;
 int popc(void);
 int pushc(int c);
 
+int lineno = 1;
 char token[TOKSIZ];
 enum token gettok(void);
 int dryread(char *s);
@@ -68,6 +69,8 @@ main()
 	puts("set -e");
 	for (st = SINIT; st != STERM && st != SERR; st = next) {
 		in = gettok();
+		if (token[0] == '\n')
+			lineno++;
 		if (in == ESCOPEN)
 			strcpy(token, "<%");
 		if (in == ESCCLS)
@@ -117,7 +120,8 @@ void entrexp(enum state from, enum token in)
 
 void entrerr(enum state from, enum token in)
 {
-	fprintf(stderr, "illegal token: %s", token);
+	fprintf(stderr, "shsub: illegal token %s at line %d\n",
+		token, lineno);
 	exit(ESYNTAX);
 }
 

test/5.err

@@ -0,0 +1 @@
+shsub: illegal token %> at line 2

test/5.in

@@ -0,0 +1,2 @@
+<% echo hello world %>
+%> this line has an error

test/6.err

@@ -0,0 +1 @@
+shsub: illegal token %> at line 1

test/6.in

@@ -0,0 +1,4 @@
+%>
+<%
+<% echo hello world %>
+%> this line has an error

version

@@ -0,0 +1 @@
+0.0.1