Only mount kernel virtual filesystems when kernel doesn't.

Author: dslm4515

s6/sv/mnt-devpts/up

@@ -1,3 +1,6 @@
 #!/bin/execlineb -P
 if { s6-echo "[   Virtual-FS   ] 3/6 : Mounting /dev/pts" }
-s6-mount -t devpts -o mode=0620,gid=5,nosuid,noexec devpts /dev/pts
+foreground { 
+  if -n { mountpoint -q /dev/pts }
+  s6-mount -t devpts -o mode=0620,gid=5,nosuid,noexec devpts /dev/pts
+}

s6/sv/mnt-shm/up

@@ -1,3 +1,6 @@
 #!/bin/execlineb -P
 if { s6-echo "[   Virtual-FS   ] 4/6 : Mounting /dev/shm" }
-s6-mount -t tmpfs -o mode=1777,nosuid,nodev shm /dev/shm
+foreground {
+  if -n { mountpoint -q /dev/shm }
+  s6-mount -t tmpfs -o mode=1777,nosuid,nodev shm /dev/shm
+}

s6/sv/prep-dev/up

@@ -1,4 +1,10 @@
 #!/bin/execlineb -P
 if { s6-echo "[   Virtual-FS   ] 0/6 : Creating mount points" }
-s6-mkdir /dev/shm
-s6-mkdir /dev/pts
+foreground { 
+  if -n { s6-test -d /dev/shm }
+  s6-mkdir /dev/shm
+}
+foreground {
+  if -n { s6-test -d /dev/pts }
+  s6-mkdir /dev/pts
+}