[Bug 1659719] Re: ssh can't call a binary from a snap without the full path

[Michael Hudson-Doyle]

The focal autopkgtest failures are in cyrus-imapd:

Mail::JMAPTalk version 0.15 required--this is only version 0.13 at ./Cassandane/Cyrus/JMAPCore.pm line 47.
BEGIN failed--compilation aborted at ./Cassandane/Cyrus/JMAPCore.pm line 47.

This seems very unlikely to be due to pam, and it happens with the
version of pam anyway. The other failure is kopanocore/armhf which is
known flaky:
https://autopkgtest.ubuntu.com/packages/k/kopanocore/focal/armhf (I've
retried it anyway).

** Tags removed: verification-needed-focal
** Tags added: verification-done-focal

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https://bugs.launchpad.net/bugs/1659719

Title:
  ssh can't call a binary from a snap without the full path

Status in Snappy:
  Fix Committed
Status in livecd-rootfs package in Ubuntu:
  Fix Released
Status in openssh package in Ubuntu:
  Confirmed
Status in pam package in Ubuntu:
  Fix Released
Status in livecd-rootfs source package in Xenial:
  New
Status in openssh source package in Xenial:
  New
Status in pam source package in Xenial:
  New
Status in livecd-rootfs source package in Bionic:
  New
Status in openssh source package in Bionic:
  New
Status in pam source package in Bionic:
  Fix Committed
Status in livecd-rootfs source package in Focal:
  New
Status in openssh source package in Focal:
  New
Status in pam source package in Focal:
  Fix Committed
Status in livecd-rootfs source package in Groovy:
  Fix Released
Status in openssh source package in Groovy:
  Confirmed
Status in pam source package in Groovy:
  Fix Released
Status in openssh package in Debian:
  New

Bug description:
  [impact]
  ssh can't call a binary from a snap, it will only work using the full path.

  [test case]
  Create a container. Install the go snap (and make sure golang-go is not installed). Run "ssh <container-ip> go version" and check the binary is found.

  [regression potential]
  It's a pam change an they are always a bit scary but the code follows the existing pattern for updating PATH in /etc/environment and has been tested in groovy.

  [original description]

  Let's say I have the hello snap installed in 192.168.122.24. Then:

  elopio at ubuntu-xenial:~/mosh$ ssh 192.168.122.24 hello
  elopio at 192.168.122.24's password:
  bash: hello: command not found
  elopio at ubuntu-xenial:~/mosh$ ssh 192.168.122.24 /snap/bin/hello
  elopio at 192.168.122.24's password:
  Hello, world!

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