1 files changed, 134 insertions, 0 deletions
diff --git a/lib/ccan/failtest/test/run-locking.c b/lib/ccan/failtest/test/run-locking.c
new file mode 100644
index 0000000000..da0ee70fac
--- /dev/null
+++ b/lib/ccan/failtest/test/run-locking.c
@@ -0,0 +1,134 @@
+/* Include the C files directly. */
+#include <ccan/failtest/failtest.c>
+#include <stdlib.h>
+#include <setjmp.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <ccan/tap/tap.h>
+
+#define SIZE 8
+
+/* We don't want to fork and fail; we're just testing lock recording. */
+static enum failtest_result dont_fail(struct tlist_calls *history)
+{
+	return FAIL_DONT_FAIL;
+}
+
+static bool place_lock(int fd, char lockarr[], unsigned pos, unsigned size,
+		       int type)
+{
+	struct flock fl;
+
+	/* Update record keeping. */
+	if (type == F_RDLCK)
+		memset(lockarr+pos, 1, size);
+	else if (type == F_WRLCK)
+		memset(lockarr+pos, 2, size);
+	else
+		memset(lockarr+pos, 0, size);
+
+	fl.l_whence = SEEK_SET;
+	fl.l_type = type;
+	fl.l_start = pos;
+	fl.l_len = size;
+	return failtest_fcntl(fd, "run-locking.c", 1, F_SETLK, &fl) == 0;
+}
+
+static char lock_lookup(int fd, unsigned pos)
+{
+	char ret = 0;
+	unsigned int i;
+	struct lock_info *l;
+
+	for (i = 0; i < lock_num; i++) {
+		l = &locks[i];
+
+		if (l->fd != fd)
+			continue;
+
+		if (pos >= l->start && pos <= l->end) {
+			if (ret)
+				ret = 3;
+			else if (l->type == F_RDLCK)
+				ret = 1;
+			else
+				ret = 2;
+		}
+	}
+	return ret;
+}
+
+static bool test(int fd,
+		 unsigned p1, unsigned s1,
+		 unsigned p2, unsigned s2,
+		 unsigned p3, unsigned s3)
+{
+	unsigned int i;
+	char lockarr[SIZE];
+
+	memset(lockarr, 0, sizeof(lockarr));
+
+	if (!place_lock(fd, lockarr, p1, s1, F_WRLCK))
+		return false;
+
+	if (!place_lock(fd, lockarr, p2, s2, F_RDLCK))
+		return false;
+
+	if (!place_lock(fd, lockarr, p3, s3, F_UNLCK))
+		return false;
+
+	for (i = 0; i < SIZE; i++) {
+		if (lock_lookup(fd, i) != lockarr[i])
+			return false;
+	}
+
+	/* Reset lock info. */
+	lock_num = 0;
+	return true;
+}
+
+int main(void)
+{
+	int fd;
+	long flags;
+	unsigned int isize;
+
+	plan_tests(5835);
+	failtest_init(0, NULL);
+	failtest_hook = dont_fail;
+
+	fd = open("run-locking-scratch", O_RDWR|O_CREAT, 0600);
+	/* GETFL and SETFL wrappers should pass through. */
+	flags = fcntl(fd, F_GETFL);
+	ok1(failtest_fcntl(fd, "run-locking.c", 1, F_GETFL) == flags);
+	flags |= O_NONBLOCK;
+	ok1(failtest_fcntl(fd, "run-locking.c", 1, F_SETFL, flags) == 0);
+	ok1(failtest_fcntl(fd, "run-locking.c", 1, F_GETFL) == flags);
+
+	for (isize = 1; isize < 4; isize++) {
+		unsigned int ipos;
+		for (ipos = 0; ipos + isize < SIZE; ipos++) {
+			unsigned int jsize;
+			for (jsize = 1; jsize < 4; jsize++) {
+				unsigned int jpos;
+				for (jpos = 0; jpos + jsize < SIZE; jpos++) {
+					unsigned int ksize;
+					for (ksize = 1; ksize < 4; ksize++) {
+						unsigned int kpos;
+						for (kpos = 0;
+						     kpos + ksize < SIZE;
+						     kpos++) {
+							ok1(test(fd,
+								 ipos, isize,
+								 jpos, jsize,
+								 kpos, ksize));
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return exit_status();
+}