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https://bugzilla.mindrot.org/show_bug.cgi?id=3181

Bug ID: 3181
Summary: ssh-agent doesn't exit automatically after child
program exits
Product: Portable OpenSSH
Version: 8.0p1
Hardware: All
OS: All
Status: NEW
Severity: trivial
Priority: P5
Component: ssh-agent
Assignee: unassigned-bugs@mindrot.org
Reporter: zergpro+openssh@yandex.ru

Man page for ssh-agent specifically documents the following:

"The agent exits automatically when the command given on the command
line terminates."

But actual behaviour differs from that documented.

Steps to reproduce:

$ ps -ef | grep agent
user 20020 18231 0 17:11 pts/0 00:00:00 grep agent
$ ssh-agent /bin/bash
$ ps -ef | grep agent
user 20024 20023 0 17:11 ? 00:00:00 ssh-agent /bin/bash
user 20050 20023 0 17:12 pts/0 00:00:00 grep agent
$ exit
exit
$ ps -ef | grep agent

Expected result:
user 20054 18231 0 17:12 pts/0 00:00:00 grep agent
$

Actual result:
user 20024 1 0 17:11 ? 00:00:00 ssh-agent /bin/bash
user 20054 18231 0 17:12 pts/0 00:00:00 grep agent
$

ssh-agent process doesn't terminate.

Reproduced on 2 environments:

1. OpenCYGWIN_NT-10.0 3.0.7(0.338/5/3) 2019-04-30 18:08 x86_64
CygwinSSH_8.1p1, OpenSSL 1.1.1d 10 Sep 2019


2. OpenSSH_8.0p1, OpenSSL 1.1.1c FIPS 28 May 2019
Linux 4.18.0-147.3.1.el8_1.x86_64 #1 SMP Fri Jan 3 23:55:26 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
CentOS Linux 8 (Core)

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