From 29cff70c83e7b614055cbb01965a5177e99272a5 Mon Sep 17 00:00:00 2001
From: Sean Whitton <spwhitton@spwhitton.name>
Date: Fri, 27 Jan 2023 17:16:42 -0700
Subject: emacsclient wrapper: check whether /run/user/$(id -u) exists

---
 bin/emacsclient | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

(limited to 'bin/emacsclient')

diff --git a/bin/emacsclient b/bin/emacsclient
index cb371608..928badb2 100755
--- a/bin/emacsclient
+++ b/bin/emacsclient
@@ -27,6 +27,7 @@ want_installed=false
 want_eval=false
 want_version=false
 timeout=
+euid=
 devel_running=false
 installed_running=false
 make=
@@ -182,16 +183,23 @@ done
 # -sgdbmacs implies --spw/installed, as a special case.
 [ "$daemon_name" = gdbmacs ] && want_installed=true
 
-# We set and export XDG_RUNTIME_DIR such that Emacs doesn't choose
-# "/tmp/emacs$(id -u)" as the socket dir.
+# We set and export XDG_RUNTIME_DIR such that Emacs doesn't choose a directory
+# under /tmp as the socket directory.  However, if /run/user/$(id -u) does not
+# already exist, then we probably don't have permission to create it.
 if [ -n "$XDG_RUNTIME_DIR" ]; then
     was_set=true
+    socket_dir="$XDG_RUNTIME_DIR/emacs/"
+    locks_dir="$XDG_RUNTIME_DIR/spw_emacsclient/"
+elif [ -d "/run/user/${euid:=$(id -u)}" ]; then
+    was_set=false
+    export XDG_RUNTIME_DIR="/run/user/$euid"
+    socket_dir="$XDG_RUNTIME_DIR/emacs/"
+    locks_dir="$XDG_RUNTIME_DIR/spw_emacsclient/"
 else
     was_set=false
-    export XDG_RUNTIME_DIR=/run/user/$(id -u)
+    socket_dir="${TMPDIR:-/tmp}/emacs$euid/"
+    locks_dir="${socket_dir}spw_emacsclient/"
 fi
-socket_dir="$XDG_RUNTIME_DIR/emacs/"
-locks_dir="$XDG_RUNTIME_DIR/spw_emacsclient/"
 
 $want_version || spw_flock 3 "${daemon_name:-server}"
 
-- 
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