`open: Permission denied` on Fedora (and Fish)

[applejag]

Adding the usage g completion-init fish | source when using Fish on Fedora results in this big list of errors when opening a new terminal:

warning: An error occurred while redirecting file '/usr/bin/chfn'
open: Permission denied
warning: An error occurred while redirecting file '/usr/bin/chsh'
open: Permission denied
warning: An error occurred while redirecting file '/usr/bin/lockdev'
open: Permission denied
warning: An error occurred while redirecting file '/usr/bin/sudo'
open: Permission denied
warning: An error occurred while redirecting file '/usr/bin/sudoedit'
open: Permission denied
warning: An error occurred while redirecting file '/usr/bin/sudoreplay'
open: Permission denied
warning: An error occurred while redirecting file '/usr/bin/userhelper'
open: Permission denied
warning: An error occurred while redirecting file '/bin/chfn'
open: Permission denied
warning: An error occurred while redirecting file '/bin/chsh'
open: Permission denied
warning: An error occurred while redirecting file '/bin/lockdev'
open: Permission denied
warning: An error occurred while redirecting file '/bin/sudo'
open: Permission denied
warning: An error occurred while redirecting file '/bin/sudoedit'
open: Permission denied
warning: An error occurred while redirecting file '/bin/sudoreplay'
open: Permission denied
warning: An error occurred while redirecting file '/bin/userhelper'
open: Permission denied
kalle@mycomputer ~> _

Debugging this shows that apparently Fedora sets permission 4111 (only execute, not readable) on some binaries

kalle@mycomputer ~> stat /bin/sudo
  File: /bin/sudo
  Size: 211088    	Blocks: 416        IO Block: 4096   regular file
Device: 0,38	Inode: 307952      Links: 1
Access: (4111/---s--x--x)  Uid: (    0/    root)   Gid: (    0/    root)
Context: system_u:object_r:sudo_exec_t:s0
Access: 2026-06-15 22:19:35.578588221 +0200
Modify: 2026-04-14 02:00:00.000000000 +0200
Change: 2026-06-14 21:13:46.956617714 +0200
 Birth: 2026-06-14 21:13:46.935617715 +0200

So in the completion script we need the test changed so it also checks for if the file is readable

usage/lib/src/complete/fish.rs

Line 115 in d5734f0

test -f $file -a -x $file; or continue

-            test -f $file -a -x $file; or continue
+            test -f $file -a -x $file -a -r $file; or continue

This probably also needs to be changed in the completion-init for the other shells too. For Bash I think it should be changed here:

usage/lib/src/complete/bash.rs

Line 135 in d5734f0

if [[ -n "$cmdpath" && -f "$cmdpath" ]]; then

[applejag]

Since my $PATH includes /bin and /usr/bin then this init script is actually quite slow. So I ended up using a version of this script that ignores these directories too:

     set -l registered
     for dir in $PATH
+        switch $dir
+            case /bin /usr/bin
+                continue
+        end
         test -d $dir; or continue
         for file in $dir/*