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@Lolozendev

Lolozendev/sharedtmux

Created July 8, 2025 22:43
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a bash script to be able to create shared tmux sessions.
Raw
sharedtmux
#!/usr/bin/env bash
SOCKDIR=/tmp/sharedtmux
SOCK=$SOCKDIR/shared.sock
SESSION=shared
GROUP=sharedtmux
# Check if user is in the sharedtmux group
if ! groups "$USER" | grep -q "\b$GROUP\b"; then
echo "User $USER is not in group $GROUP"
exit 1
fi
# Setup shared socket dir if needed
if [ ! -d "$SOCKDIR" ]; then
mkdir "$SOCKDIR"
chgrp "$GROUP" "$SOCKDIR"
chmod 770 "$SOCKDIR"
fi
# Check if socket exists
if [ -S "$SOCK" ]; then
echo "Attaching to existing session as $USER"
else
echo "Creating session as $USER"
# Set umask for group access
umask 007
tmux -S "$SOCK" new -d -s "$SESSION"
# Fix permissions immediately
chmod 770 "$SOCK"
chgrp "$GROUP" "$SOCK"
# Grant access to all users in the group
for user in $(getent group "$GROUP" | cut -d: -f4 | tr ',' ' '); do
if [ "$user" != "$USER" ] && [ -n "$user" ]; then
tmux -S "$SOCK" server-access -a "$user"
fi
done
fi
# Attach
tmux -S "$SOCK" attach -t "$SESSION"
# Cleanup
if ! tmux -S "$SOCK" ls &>/dev/null; then
echo "Session ended. Cleaning up socket."
[ -S "$SOCK" ] && rm -f "$SOCK"
fi
@Lolozendev
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Lolozendev commented Jul 8, 2025

  • You'll need tmux installed
  • You'll need a group named 'sharedtmux' on all user that you want to be able to join your shared sessions
  • ❗Be careful there may be weird behavior if you use this script inside an already existing tmux session (tmuxception)

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