1 files changed, 59 insertions, 0 deletions
diff --git a/src/mesa/util/os_file.h b/src/mesa/util/os_file.h
new file mode 100644
index 00000000..0c69eeaa
--- /dev/null
+++ b/src/mesa/util/os_file.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2019 Intel Corporation
+ * SPDX-License-Identifier: MIT
+ *
+ * File operations helpers
+ */
+
+#ifndef _OS_FILE_H_
+#define _OS_FILE_H_
+
+#include <stdbool.h>
+#include <stdio.h>
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Create a new file and opens it for writing-only.
+ * If the given filename already exists, nothing is done and NULL is returned.
+ * `errno` gets set to the failure reason; if that is not EEXIST, the caller
+ * might want to do something other than trying again.
+ */
+FILE *
+os_file_create_unique(const char *filename, int filemode);
+
+/*
+ * Duplicate a file descriptor, making sure not to keep it open after an exec*()
+ */
+int
+os_dupfd_cloexec(int fd);
+
+/*
+ * Read a file.
+ * Returns a char* that the caller must free(), or NULL and sets errno.
+ * If size is not null and no error occurred it's set to the size of the
+ * file.
+ * Reads files as binary and includes a NUL terminator after the end of the
+ * returned buffer.
+ */
+char *
+os_read_file(const char *filename, size_t *size);
+
+/*
+ * Try to determine if two file descriptors reference the same file description
+ *
+ * Return values:
+ * - 0:   They reference the same file description
+ * - > 0: They do not reference the same file description
+ * - < 0: Unable to determine whether they reference the same file description
+ */
+int
+os_same_file_description(int fd1, int fd2);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _OS_FILE_H_ */