From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Tue, 10 Jan 2017 15:16:15 +0000 (+0100)
Subject: core: check for empty name & label of a gpiochip
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=474a97f84675849621cbfc1129ea5e2db487b50b;p=qemu-gpiodev%2Flibgpiod.git

core: check for empty name & label of a gpiochip

In case the kernel passes us an empty name or label field when reading
the chip info: return NULL from gpiod_chip_name() & gpiod_chip_label()
just like the line counterparts do.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---

diff --git a/core.c b/core.c
index 4fe2fa2..ea24288 100644
--- a/core.c
+++ b/core.c
@@ -878,13 +878,12 @@ void gpiod_chip_close(struct gpiod_chip *chip)
 
 const char * gpiod_chip_name(struct gpiod_chip *chip)
 {
-	return chip->cinfo.name;
+	return chip->cinfo.name[0] == '\0' ? NULL : chip->cinfo.name;
 }
 
 const char * gpiod_chip_label(struct gpiod_chip *chip)
 {
-	/* REVISIT can a gpiochip not have a label? */
-	return chip->cinfo.label;
+	return chip->cinfo.label[0] == '\0' ? NULL : chip->cinfo.label;
 }
 
 unsigned int gpiod_chip_num_lines(struct gpiod_chip *chip)