sd-device: introduce device_get_sysattr_int()

2 files changed, 20 insertions, 0 deletions

diff --git a/src/libsystemd/sd-device/device-private.h b/src/libsystemd/sd-device/device-private.h
index d53479e8c9..90da7f4317 100644
--- a/src/libsystemd/sd-device/device-private.h
+++ b/src/libsystemd/sd-device/device-private.h
@@ -18,6 +18,7 @@ int device_new_from_strv(sd_device **ret, char **strv);
 int device_opendir(sd_device *device, const char *subdir, DIR **ret);
 
 int device_get_property_bool(sd_device *device, const char *key);
+int device_get_sysattr_int(sd_device *device, const char *sysattr, int *ret_value);
 int device_get_sysattr_unsigned(sd_device *device, const char *sysattr, unsigned *ret_value);
 int device_get_sysattr_bool(sd_device *device, const char *sysattr);
 int device_get_device_id(sd_device *device, const char **ret);
diff --git a/src/libsystemd/sd-device/sd-device.c b/src/libsystemd/sd-device/sd-device.c
index 9364a69dcd..3b8784e30a 100644
--- a/src/libsystemd/sd-device/sd-device.c
+++ b/src/libsystemd/sd-device/sd-device.c
@@ -2210,6 +2210,25 @@ _public_ int sd_device_get_sysattr_value(sd_device *device, const char *sysattr,
         return 0;
 }
 
+int device_get_sysattr_int(sd_device *device, const char *sysattr, int *ret_value) {
+        const char *value;
+        int r;
+
+        r = sd_device_get_sysattr_value(device, sysattr, &value);
+        if (r < 0)
+                return r;
+
+        int v;
+        r = safe_atoi(value, &v);
+        if (r < 0)
+                return log_device_debug_errno(device, r, "Failed to parse '%s' attribute: %m", sysattr);
+
+        if (ret_value)
+                *ret_value = v;
+        /* We return "true" if the value is positive. */
+        return v > 0;
+}
+
 int device_get_sysattr_unsigned(sd_device *device, const char *sysattr, unsigned *ret_value) {
         const char *value;
         int r;