Let read_file return the actual data size

Let read_file return the actual data size to the caller. This gives
the caller the possibility to check that the data size is as expected
and large enough for the purpose, and report to the user if not.

1 files changed, 1 insertions, 1 deletions

diff --git a/util.h b/util.h
index 9d409cd..b8748f1 100644
--- a/util.h
+++ b/util.h
@@ -25,7 +25,7 @@
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
 
 int checksum(const u8 *buf, size_t len);
-void *read_file(size_t len, const char *filename);
+void *read_file(size_t *len, const char *filename);
 void *mem_chunk(off_t base, size_t len, const char *devmem);
 int write_dump(size_t base, size_t len, const void *data, const char *dumpfile, int add);
 u64 u64_range(u64 start, u64 end);