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fix(ssh-agent): create screen/tmux symlink atomically (#14035)

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Co-authored-by: Carlo Sala <carlosalag@protonmail.com>
This commit is contained in:
Matt Campbell
2026-09-04 08:19:10 -03:00
committed by GitHub
co-authored by Carlo Sala
parent 9112b53fa8
commit 3f84a2ae4a
1 changed files with 10 additions and 2 deletions
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plugins/ssh-agent/ssh-agent.plugin.zsh
+10 -2
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@@ -101,10 +101,18 @@ if zstyle -t :omz:plugins:ssh-agent agent-forwarding \
&& [[ -n "$SSH_AUTH_SOCK" ]]; then && [[ -n "$SSH_AUTH_SOCK" ]]; then
if [[ ! -L "$SSH_AUTH_SOCK" ]]; then if [[ ! -L "$SSH_AUTH_SOCK" ]]; then
if [[ -n "$TERMUX_VERSION" ]]; then if [[ -n "$TERMUX_VERSION" ]]; then
ln -sf "$SSH_AUTH_SOCK" "$PREFIX"/tmp/ssh-agent-$USERNAME-screen _omz_ssh_agent_link="$PREFIX"/tmp/ssh-agent-$USERNAME-screen
else else
ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USERNAME-screen _omz_ssh_agent_link=/tmp/ssh-agent-$USERNAME-screen
fi fi
# `ln -sf` unlinks the old symlink and then creates the new one: two
# syscalls, no atomic swap. Shells starting concurrently (a tmux window
# opening several panes at once) interleave those steps and all but one
# fail with "ln: ...: File exists". Stage the link under a PID-unique
# name and move it into place, since rename(2) is atomic.
command ln -sf "$SSH_AUTH_SOCK" "$_omz_ssh_agent_link.$$" \
&& command mv -f "$_omz_ssh_agent_link.$$" "$_omz_ssh_agent_link"
unset _omz_ssh_agent_link
fi fi
else else
_start_agent _start_agent