added error messages for posix error code

lib/pleroma/utils.ex

@@ -3,6 +3,14 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Utils do
+  @posix_error_codes ~w(
+    eacces eagain ebadf ebadmsg ebusy edeadlk edeadlock edquot eexist efault
+    efbig eftype eintr einval eio eisdir eloop emfile emlink emultihop
+    enametoolong enfile enobufs enodev enolck enolink enoent enomem enospc
+    enosr enostr enosys enotblk enotdir enotsup enxio eopnotsupp eoverflow
+    eperm epipe erange erofs espipe esrch estale etxtbsy exdev
+  )a
+
   def compile_dir(dir) when is_binary(dir) do
     dir
     |> File.ls!()
@@ -44,4 +52,12 @@ defmodule Pleroma.Utils do
       error -> error
     end
   end
+
+  @spec posix_error_message(atom()) :: binary()
+  def posix_error_message(code) when code in @posix_error_codes do
+    error_message = Gettext.dgettext(Pleroma.Web.Gettext, "posix_errors", "#{code}")
+    "(POSIX error: #{error_message})"
+  end
+
+  def posix_error_message(_), do: ""
 end