1 files changed, 66 insertions, 0 deletions
diff --git a/ports/unix/guts/mknodat.c b/ports/unix/guts/mknodat.c
new file mode 100644
index 0000000..22fe5ce
--- /dev/null
+++ b/ports/unix/guts/mknodat.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2011 Wind River Systems; see
+ * guts/COPYRIGHT for information.
+ *
+ * int mknodat(int dirfd, const char *path, mode_t mode, dev_t dev)
+ *	int rc = -1;
+ */
+
+ 	pseudo_msg_t *msg;
+	struct stat buf;
+
+#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
+	if (dirfd != AT_FDCWD) {
+		errno = ENOSYS;
+		return -1;
+	}
+	rc = real_stat(path, &buf);
+#else
+	rc = real___fxstatat(_STAT_VER, dirfd, path, &buf, AT_SYMLINK_NOFOLLOW);
+#endif
+	if (rc != -1) {
+		/* if we can stat the file, you can't mknod it */
+		errno = EEXIST;
+		return -1;
+	}
+#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
+	rc = real_open(path, O_CREAT | O_WRONLY | O_EXCL, PSEUDO_FS_MODE(mode));
+#else
+	rc = real_openat(dirfd, path, O_CREAT | O_WRONLY | O_EXCL,
+		PSEUDO_FS_MODE(mode));
+#endif
+	if (rc == -1) {
+		return -1;
+	}
+	real_fstat(rc, &buf);
+	/* mknod does not really open the file.  We don't have
+	 * to use wrap_close because we've never exposed this file
+	 * descriptor to the client code.
+	 */
+	real_close(rc);
+
+	/* mask in the mode type bits again */
+	buf.st_mode = (PSEUDO_DB_MODE(buf.st_mode, mode) & 07777) |
+			(mode & ~07777);
+	buf.st_rdev = dev;
+	msg = pseudo_client_op_plain(OP_MKNOD, 0, -1, dirfd, path, &buf);
+	if (msg && msg->result != RESULT_SUCCEED) {
+		errno = EPERM;
+		rc = -1;
+	} else {
+		/* just pretend we worked */
+		rc = 0;
+	}
+	if (rc == -1) {
+		int save_errno = errno;
+#ifdef PSEUDO_NO_REAL_AT_FUNCTIONS
+		real_unlink(path);
+#else
+		real_unlinkat(dirfd, path, AT_SYMLINK_NOFOLLOW);
+#endif
+		errno = save_errno;
+	}
+
+/*	return rc;
+ * }
+ */