swap: ignore missing /proc/swaps

Otherwise systemd reports "Failed to fully start up daemon: No such file or
directory" when swap is disabled in the kernel.

diff --git a/src/swap.c b/src/swap.c
index 14719ad18c9c3afa68415fbaecce8208ffa83a49..7675e6af21c9e10c5bcc89acb8c633a250e0db45 100644 (file)
--- a/src/swap.c
+++ b/src/swap.c
@@ -1237,7 +1237,7 @@ static int swap_enumerate(Manager *m) {
 
         if (!m->proc_swaps) {
                 if (!(m->proc_swaps = fopen("/proc/swaps", "re")))
-                        return -errno;
+                        return (errno == ENOENT) ? 0 : -errno;
 
                 m->swap_watch.type = WATCH_SWAP;
                 m->swap_watch.fd = fileno(m->proc_swaps);