Polishing VMOD JSON handling

lib/libvcc/vcc_vmod.c

@@ -77,7 +77,7 @@ static int
 vcc_path_open(void *priv, const char *fn)
 {
 	struct vmod_import *vim;
-	const char *magic = "VMOD_JSON_SPEC\x03", *p;
+	const char *magic = "VMOD_JSON_SPEC\x02", *p;
 	int c;
 	FILE *f;
 
@@ -114,10 +114,10 @@ vcc_path_open(void *priv, const char *fn)
 		c = getc(f);
 		if (c == EOF) {
 			AZ(fclose(f));
-			vim->err = "No VMOD JSON found";
+			vim->err = "Truncated VMOD JSON";
 			return (-1);
 		}
-		if (c == '\0')
+		if (c == '\x03')
 			break;
 		VSB_putc(vim->json, c);
 	}
@@ -442,7 +442,7 @@ vcc_ParseImport(struct vcc *tl)
 			    "Could not open VMOD %.*s\n", PF(mod));
 			VSB_printf(tl->sb, "\tFile name: %s\n",
 			    vim->path != NULL ? vim->path : fn);
-			VSB_printf(tl->sb, "\tdlerror: %s\n", vim->err);
+			VSB_printf(tl->sb, "\tError: %s\n", vim->err);
 		}
 		vcc_ErrWhere(tl, mod);
 		vcc_vim_destroy(&vim);

lib/libvcc/vmodtool.py

@@ -1105,7 +1105,7 @@ class vcc(object):
     def json(self, fo, fnx):
         fo.write('#define STRINGIFY(arg) #arg\n')
         fo.write("\nstatic const char Vmod_Json[] = {\n")
-        fo.write('\t"VMOD_JSON_SPEC\\x03"\n')
+        fo.write('\t"VMOD_JSON_SPEC\x02"\n')
 
         for n, i in enumerate(self.iter_json(fnx)):
             fo.write('\t"')
@@ -1121,7 +1121,7 @@ class vcc(object):
                 fo.write('\t    STRINGIFY(%s)\n' % self.vrt_minor)
             else:
                 fo.write('"\n')
-        fo.write('\t\"\\n\"\n};\n')
+        fo.write('\t\"\\n\\x03\"\n};\n')
         fo.write('#undef STRINGIFY\n')