1 files changed, 62 insertions, 0 deletions
diff --git a/lib/libc/tests/gen/glob_blocks_test.c b/lib/libc/tests/gen/glob_blocks_test.c
new file mode 100644
index 000000000000..629b90bee762
--- /dev/null
+++ b/lib/libc/tests/gen/glob_blocks_test.c
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2025 Klara, Inc.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <sys/stat.h>
+
+#include <errno.h>
+#include <glob.h>
+#include <stdbool.h>
+
+#include <atf-c.h>
+
+ATF_TC(glob_b_callback);
+ATF_TC_HEAD(glob_b_callback, tc)
+{
+	atf_tc_set_md_var(tc, "descr",
+	    "Test ability of callback block to suppress errors");
+	atf_tc_set_md_var(tc, "require.user", "unprivileged");
+}
+ATF_TC_BODY(glob_b_callback, tc)
+{
+	static bool glob_callback_invoked;
+	static int (^errblk)(const char *, int) =
+	    ^(const char *path, int err) {
+		ATF_CHECK_STREQ(path, "test/");
+		ATF_CHECK(err == EACCES);
+		glob_callback_invoked = true;
+		/* Suppress EACCES errors. */
+		return (0);
+	};
+	glob_t g;
+	int rv;
+
+	ATF_REQUIRE_EQ(0, mkdir("test", 0755));
+	ATF_REQUIRE_EQ(0, symlink("foo", "test/foo"));
+	ATF_REQUIRE_EQ(0, chmod("test", 0));
+
+	glob_callback_invoked = false;
+	rv = glob_b("test/*", 0, errblk, &g);
+	ATF_CHECK_MSG(glob_callback_invoked,
+	    "glob(3) failed to invoke callback block");
+	ATF_CHECK_EQ_MSG(GLOB_NOMATCH, rv,
+	    "callback function failed to suppress EACCES");
+	globfree(&g);
+
+	/* GLOB_ERR should ignore the suppressed error. */
+	glob_callback_invoked = false;
+	rv = glob_b("test/*", GLOB_ERR, errblk, &g);
+	ATF_CHECK_MSG(glob_callback_invoked,
+	    "glob(3) failed to invoke callback block");
+	ATF_CHECK_EQ_MSG(GLOB_ABORTED, rv,
+	    "GLOB_ERR didn't override callback block");
+	globfree(&g);
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+	ATF_TP_ADD_TC(tp, glob_b_callback);
+	return (atf_no_error());
+}