util: Add read_file() function for reading sysfs files

Add a function that can read a complete, unknown size file for
reading entry point files from sysfs.  This function models its signature
on the mem_chunk() funtion, so it also allocates memory that the caller
needs to free.  The files that we are interested in reading are very small,
and have a known upper bound on the size.  The EINTR handling is based
on the myread() function.

Contributed by Roy Franz.

1 files changed, 5 insertions, 0 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 0a9396a..3fc9573 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+2015-04-21  Roy Franz  <roy.franz@linaro.org>
+
+	* util.c, util.h: Add utility function read_file, which reads an
+	  entire binary file into a buffer.
+
 2015-04-20  Jean Delvare  <jdelvare@suse.de>
 
 	* biosdecode.c: Add support for the _SM3_ entry point, as defined in