shared/util: assume ac when /sys/class/power_supply is missing

On s390 (at least) /sys/class/power_supply is not present. We should
treat this like if this directory was empty, and not an error.

diff --git a/src/shared/util.c b/src/shared/util.c
index 4a970af3b1972f3a28abe28d878c50b2966d1875..74f29949c97619ce429b49e5b6f8d49f43fb297a 100644 (file)
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -5999,7 +5999,7 @@ int on_ac_power(void) {
 
         d = opendir("/sys/class/power_supply");
         if (!d)
-                return -errno;
+                return errno == ENOENT ? true : -errno;
 
         for (;;) {
                 struct dirent *de;