lib/sysfs: Explicit read/write length

Export a couple of routines to read/write an exact length, rather than a
strring.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/igt_sysfs.h b/lib/igt_sysfs.h
index 69b2e5ec..4089535d 100644
--- a/lib/igt_sysfs.h
+++ b/lib/igt_sysfs.h
@@ -29,6 +29,10 @@
 
 int igt_sysfs_open(int device, int *idx);
 int igt_sysfs_open_parameters(int device);
+
+int igt_sysfs_read(int dir, const char *attr, void *data, int len);
+int igt_sysfs_write(int dir, const char *attr, const void *data, int len);
+
 bool igt_sysfs_set(int dir, const char *attr, const char *value);
 char *igt_sysfs_get(int dir, const char *attr);