use a c program to fill the file

it's several order of magnitude faster than the equivalent shell script

.gitignore

@@ -16,3 +16,6 @@ configure.local
 regress/testdata
 regress/*.pem
 regress/reg.conf
+regress/fill-file
+regress/iri_test
+regress/*.o

regress/Makefile

@@ -8,6 +8,9 @@ all: iri_test runtime
 iri_test: iri_test.o ../iri.o ../utf8.o
 	${CC} iri_test.o ../iri.o ../utf8.o -o iri_test ${LDFLAGS}
 
+fill-file: fill-file.o
+	${CC} fill-file.o -o fill-file
+
 key.pem: cert.pem
 
 # XXX: key size is NOT GOOD.  This is only for testing.  Smaller keys
@@ -24,9 +27,9 @@ clean:
 	rm -f *.o iri_test cert.pem key.pem
 	rm -rf testdata
 
-testdata:
+testdata: fill-file
 	mkdir testdata
-	./genbigfile testdata/bigfile
+	./fill-file testdata/bigfile
 	./sha testdata/bigfile testdata/bigfile.sha
 	printf "# hello world\n" > testdata/index.gmi
 	./sha testdata/index.gmi testdata/index.gmi.sha

regress/fill-file.c

@@ -0,0 +1,29 @@
+#include <stdio.h>
+
+/* I need a big file made up of ascii characters.  dd if=/dev/zero is
+ * thus not an option, truncate is not portable.  This is some order
+ * of magnitude faster than the equivalent sh script */
+
+int
+main(int argc, char **argv)
+{
+	FILE *out;
+	int i, j;
+
+	if (argc != 2) {
+		fprintf(stderr, "USAGE: %s <file>\n", *argv);
+		return 1;
+	}
+
+	if ((out = fopen(argv[1], "w")) == NULL) {
+		fprintf(stderr, "cannot open file: %s\n", argv[1]);
+		return 1;
+	}
+
+	for (i = 0; i < 1024; ++i)
+		for (j = 0; j < 1024; ++j)
+			fprintf(out, "a\n");
+
+	fclose(out);
+	return 0;
+}