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ssh-agent: improvements (#6309)

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* ssh-agent: lock this script with a mkdir style mutex

This script is a kind of singleton pattern and is not reentrant.
If several shells are oppened in a fast sequence, then several
independent ssh-agents would be created, which is not acceptable.
A mutex is required.

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>

* ssh-agent: only start agent if .ssh dir exists

To use the same profile system-wide, it might happen
that the .ssh directory does not exist
(typically $HOME/.ssh/). This would trigger a error.

Creating the directory would be a option, but it
usually will not make sense to do so because it means
the user doesn't have ssh keys or config.

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>

* ssh-agent: adds lazy option to disable key loading on start

Option is documented on updated README.md

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>

* ssh-agent: simplify agent-forwarding checking

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>

Co-authored-by: Robby Russell <robby@planetargon.com>
This commit is contained in:
Nuno Goncalves
2021-06-12 04:03:25 +02:00
committed by GitHub
parent 02ce2c4a2f
commit a206271460
2 changed files with 31 additions and 10 deletions
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12
plugins/ssh-agent/README.md
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@@ -19,9 +19,17 @@ To enable **agent forwarding support** add the following to your zshrc file:
zstyle :omz:plugins:ssh-agent agent-forwarding on
```
----
To **NOT load any identities on start** use the `lazy` style.
This is particularly usefull when combined with the AddKeysToAgent
(available from OpenSSH 7.2), since it allows to enter the password only
on first use.
To **load multiple identities** use the `identities` style, For example:
```zsh
zstyle :omz:plugins:ssh-agent lazy yes
```
To **load multiple identities** use the `identities` style. This have no
effect if `lazy` is enabled.
```zsh
zstyle :omz:plugins:ssh-agent identities id_rsa id_rsa2 id_github