tests: Skip fstype tests if the mtab isn't available

Author: tavianator

tests/bfs/printf_everything.sh

@@ -1,4 +1,10 @@
-everything=(%{a,b,c,d,D,f,F,g,G,h,H,i,k,l,m,M,n,p,P,s,S,t,u,U,y,Y})
+everything=(%{a,b,c,d,D,f,g,G,h,H,i,k,l,m,M,n,p,P,s,S,t,u,U,y,Y})
+
+# Check if we have fstypes
+if ! fail invoke_bfs basic -printf '%F' -quit >/dev/null; then
+    everything+=(%F)
+fi
+
 everything+=(%{A,C,T}{%,+,@,a,A,b,B,c,C,d,D,e,F,g,G,h,H,I,j,k,l,m,M,n,p,r,R,s,S,t,T,u,U,V,w,W,x,X,y,Y,z,Z})
 
 # Check if we have birth times

tests/gnu/fstype.sh

@@ -1,2 +1,3 @@
 fstype=$(invoke_bfs basic -maxdepth 0 -printf '%F\n')
+skip_if test $? -ne 0
 bfs_diff basic -fstype "$fstype"