1 files changed, 30 insertions, 0 deletions
diff --git a/portability/mknodat.c b/portability/mknodat.c
new file mode 100644
index 0000000..0d5c459
--- /dev/null
+++ b/portability/mknodat.c
@@ -0,0 +1,30 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+int mknodat(int dirfd, const char *pathname, mode_t mode, dev_t dev)
+{
+	int ret = 0;
+	int curdir_fd = open(".", O_DIRECTORY | O_CLOEXEC);
+	if (curdir_fd < 0)
+		return -1;
+
+	if (fchdir(dirfd) < 0) {
+		ret = -1;
+		goto cleanup;
+	}
+
+	/* if mknod fails, fall through and restore the original dirfd */
+	if (mknod(pathname, mode, dev) < 0) {
+		ret = -1;
+	}
+
+	if (fchdir(curdir_fd) < 0) {
+		ret = -1;
+		goto cleanup;
+	}
+
+cleanup:
+	close(curdir_fd);
+	return ret;
+}