1 files changed, 51 insertions, 0 deletions
diff --git a/usr/klibc/tests/fcntl.c b/usr/klibc/tests/fcntl.c
new file mode 100644
index 0000000..30cc900
--- /dev/null
+++ b/usr/klibc/tests/fcntl.c
@@ -0,0 +1,51 @@
+/*
+ * Simple test of fcntl
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char *argv[])
+{
+	int fd = open(argv[0], O_RDONLY);
+	struct flock l;
+	long flags;
+
+	(void)argc;
+
+	if (fd < 0) {
+		perror("open");
+		exit(1);
+	}
+
+	/* Get the flags on this FD */
+
+	flags = fcntl(fd, F_GETFL);
+	if (flags == -1) {
+		perror("F_GETFL");
+		exit(1);
+	}
+
+	if (flags != (O_RDONLY | O_LARGEFILE))
+		fprintf(stderr, "flags = %#lx\n", flags);
+
+	/* Set a lock on this FD */
+	memset(&l, 0, sizeof l);
+	l.l_type = F_RDLCK;
+	l.l_whence = SEEK_SET;
+	l.l_start = 123;
+	l.l_len = 456;
+
+	if (fcntl(fd, F_SETLK, &l) == -1) {
+		perror("F_SETLK");
+		exit(1);
+	}
+
+	/* Eventually, fork and try to conflict with this lock... */
+
+	close(fd);
+	return 0;
+}