util: add os_read_file() helper

readN() taken from igt.
os_read_file() inspired by igt_sysfs_get()

Signed-off-by: Eric Engestrom <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/util/os_file.h b/src/util/os_file.h
new file mode 100644
index 00000000000..2f97c19ed55
--- /dev/null
+++ b/src/util/os_file.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2019 Intel Corporation
+ * SPDX-License-Identifier: MIT
+ *
+ * File operations helpers
+ */
+
+#ifndef _OS_FILE_H_
+#define _OS_FILE_H_
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Read a file.
+ * Returns a char* that the caller must free(), or NULL and sets errno.
+ */
+char *
+os_read_file(const char *filename);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _OS_FILE_H_ */