1 files changed, 72 insertions, 0 deletions
diff --git a/lib/ccan/failtest/test/run-open.c b/lib/ccan/failtest/test/run-open.c
new file mode 100644
index 0000000000..0166506480
--- /dev/null
+++ b/lib/ccan/failtest/test/run-open.c
@@ -0,0 +1,72 @@
+/* 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>
+
+int main(void)
+{
+	int fd, pfd[2], err;
+	char buf[] = "Hello world!";
+	struct stat st;
+
+	plan_tests(12);
+	failtest_init(0, NULL);
+
+	if (pipe(pfd))
+		abort();
+	fd = failtest_open("run-open-scratchpad", "run-open.c", 1,
+			   O_RDWR|O_CREAT, 0600);
+	if (fd == -1) {
+		/* We are the child: write error code for parent to check. */
+		err = errno;
+		if (write(pfd[1], &err, sizeof(err)) != sizeof(err))
+			abort();
+		failtest_exit(0);
+	}
+	/* Check it is read-write. */
+	ok1(write(fd, buf, strlen(buf)) == strlen(buf));
+	lseek(fd, SEEK_SET, 0);
+	ok1(read(fd, buf, strlen("Hello world!")) == strlen("Hello world!"));
+	ok1(strcmp(buf, "Hello world!") == 0);
+
+	/* Check name and perms. */
+	ok1(stat("run-open-scratchpad", &st) == 0);
+	ok1(st.st_size == strlen(buf));
+	ok1(S_ISREG(st.st_mode));
+	ok1((st.st_mode & 0777) == 0600);
+
+	/* Check child got correct errno. */
+	ok1(read(pfd[0], &err, sizeof(err)) == sizeof(err));
+	ok1(err == EACCES);
+
+	/* Clean up. */
+	failtest_close(fd, "run-open.c", 1);
+	close(pfd[0]);
+	close(pfd[1]);
+
+	/* Two-arg open. */
+	if (pipe(pfd) != 0)
+		abort();
+	fd = failtest_open("run-open-scratchpad", "run-open.c", 1, O_RDONLY);
+	if (fd == -1) {
+		/* We are the child: write error code for parent to check. */
+		err = errno;
+		if (write(pfd[1], &err, sizeof(err)) != sizeof(err))
+			abort();
+		failtest_exit(0);
+	}
+	/* Check it is read-only. */
+	ok1(write(fd, buf, strlen(buf)) == -1);
+	ok1(read(fd, buf, strlen("Hello world!")) == strlen("Hello world!"));
+	ok1(strcmp(buf, "Hello world!") == 0);
+	/* Clean up. */
+	failtest_close(fd, "run-open.c", 1);
+	close(pfd[0]);
+	close(pfd[1]);
+
+	return exit_status();
+}