lib/sysfs: Provide scanf/printf wrappers

In order to avoid having to build and parse whole strings, use the
FILE stream interface.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/igt_sysfs.h b/lib/igt_sysfs.h
index ce0501f1..2ff798d3 100644
--- a/lib/igt_sysfs.h
+++ b/lib/igt_sysfs.h
@@ -31,6 +31,12 @@ int igt_sysfs_open(int device, int *idx);
 int igt_sysfs_open_parameters(int fd);
 bool igt_sysfs_set(int dir, const char *attr, const char *value);
 char *igt_sysfs_get(int dir, const char *attr);
+
+int igt_sysfs_scanf(int dir, const char *attr, const char *fmt, ...)
+	__attribute__((format(scanf,3,4)));
+int igt_sysfs_printf(int dir, const char *attr, const char *fmt, ...)
+	__attribute__((format(printf,3,4)));
+
 bool igt_sysfs_get_boolean(int dir, const char *attr);
 bool igt_sysfs_set_boolean(int dir, const char *attr, bool value);