4 files changed, 24 insertions, 8 deletions
diff --git a/t/helper/test-genzeros.c b/t/helper/test-genzeros.c
index 9532f5bac9..8ca988d621 100644
--- a/t/helper/test-genzeros.c
+++ b/t/helper/test-genzeros.c
@@ -3,18 +3,31 @@
 
 int cmd__genzeros(int argc, const char **argv)
 {
-	long count;
+	/* static, so that it is NUL-initialized */
+	static const char zeros[256 * 1024];
+	intmax_t count;
+	ssize_t n;
 
 	if (argc > 2) {
 		fprintf(stderr, "usage: %s [<count>]\n", argv[0]);
 		return 1;
 	}
 
-	count = argc > 1 ? strtol(argv[1], NULL, 0) : -1L;
+	count = argc > 1 ? strtoimax(argv[1], NULL, 0) : -1;
 
-	while (count < 0 || count--) {
-		if (putchar(0) == EOF)
+	/* Writing out individual NUL bytes is slow... */
+	while (count < 0)
+		if (write(1, zeros, ARRAY_SIZE(zeros)) < 0)
 			return -1;
+
+	while (count > 0) {
+		n = write(1, zeros, count < ARRAY_SIZE(zeros) ?
+			  count : ARRAY_SIZE(zeros));
+
+		if (n < 0)
+			return -1;
+
+		count -= n;
 	}
 
 	return 0;
diff --git a/t/helper/test-read-cache.c b/t/helper/test-read-cache.c
index b52c174acc..0d9f08931a 100644
--- a/t/helper/test-read-cache.c
+++ b/t/helper/test-read-cache.c
@@ -39,8 +39,6 @@ int cmd__read_cache(int argc, const char **argv)
 	int table = 0, expand = 0;
 
 	initialize_the_repository();
-	prepare_repo_settings(r);
-	r->settings.command_requires_full_index = 0;
 
 	for (++argv, --argc; *argv && starts_with(*argv, "--"); ++argv, --argc) {
 		if (skip_prefix(*argv, "--print-and-refresh=", &name))
@@ -56,6 +54,9 @@ int cmd__read_cache(int argc, const char **argv)
 	setup_git_directory();
 	git_config(git_default_config, NULL);
 
+	prepare_repo_settings(r);
+	r->settings.command_requires_full_index = 0;
+
 	for (i = 0; i < cnt; i++) {
 		repo_read_index(r);
 
diff --git a/t/helper/test-read-midx.c b/t/helper/test-read-midx.c
index 9d6fa7a377..27072ba94d 100644
--- a/t/helper/test-read-midx.c
+++ b/t/helper/test-read-midx.c
@@ -55,9 +55,10 @@ static int read_midx_file(const char *object_dir, int show_objects)
 			printf("%s %"PRIu64"\t%s\n",
 			       oid_to_hex(&oid), e.offset, e.p->pack_name);
 		}
-		return 0;
 	}
 
+	close_midx(m);
+
 	return 0;
 }
 
diff --git a/t/helper/test-ref-store.c b/t/helper/test-ref-store.c
index 98f827edfb..73461c29d3 100644
--- a/t/helper/test-ref-store.c
+++ b/t/helper/test-ref-store.c
@@ -123,9 +123,10 @@ static int cmd_resolve_ref(struct ref_store *refs, const char **argv)
 	int resolve_flags = arg_flags(*argv++, "resolve-flags");
 	int flags;
 	const char *ref;
+	int ignore_errno;
 
 	ref = refs_resolve_ref_unsafe(refs, refname, resolve_flags,
-				      &oid, &flags);
+				      &oid, &flags, &ignore_errno);
 	printf("%s %s 0x%x\n", oid_to_hex(&oid), ref ? ref : "(null)", flags);
 	return ref ? 0 : 1;
 }