'podman exec' resets the terminal size to 80x24

[debarshiray]

/kind bug

Description

Somewhere between podman-1.4.4-4.fc29 and podman-1.5.1-3.fc29, podman exec started to reset the inner terminal's size to 80x24 even if the outer terminal had different dimensions.

Reverting runc doesn't help. eg., I went as far back as runc-1.0.0-57.dev.git9e5aa74.fc29.

In order to reproduce, resize the window of your terminal emulation application, and then use less(1) to render some text. You will see that less(1) either doesn't use the full extent of the terminal or uses too much, depending on whether your terminal emulation window is bigger or smaller than 80x24.

This doesn't affect terminals created by podman run.

This isn't affected:

$ podman run --env TERM=$TERM --rm -it registry.fedoraproject.org/f30/fedora-toolbox:30 /bin/bash

However, this is affected:

$ podman create --name foo registry.fedoraproject.org/f30/fedora-toolbox:30 sleep +Inf
$ podman start foo
$ podman exec --env TERM=$TERM -it foo /bin/bash

Additional information you deem important (e.g. issue happens only occasionally):

Reproducible at will.

Output of podman version:

Version:            1.5.1
RemoteAPI Version:  1
Go Version:         go1.11.12
OS/Arch:            linux/amd64

Output of podman info --debug:

debug:
  compiler: gc
  git commit: ""
  go version: go1.11.12
  podman version: 1.5.1
host:
  BuildahVersion: 1.10.1
  Conmon:
    package: podman-1.5.1-3.fc29.x86_64
    path: /usr/libexec/podman/conmon
    version: 'conmon version 2.0.0, commit: fa55639b725e7626b28dbd43de8e9546f7411226-dirty'
  Distribution:
    distribution: fedora
    version: "29"
  MemFree: 322080768
  MemTotal: 8126631936
  OCIRuntime:
    package: runc-1.0.0-93.dev.gitb9b6cc6.fc29.x86_64
    path: /usr/bin/runc
    version: |-
      runc version 1.0.0-rc8+dev
      commit: 82f4855a8421018c9f4d74fbcf2da7f8ad1e11fa
      spec: 1.0.1-dev
  SwapFree: 4130586624
  SwapTotal: 4133482496
  arch: amd64
  cpus: 4
  eventlogger: journald
  hostname: kolache
  kernel: 5.2.7-100.fc29.x86_64
  os: linux
  rootless: true
  uptime: 2h 16m 43.25s (Approximately 0.08 days)
registries:
  blocked: null
  insecure: null
  search:
  - docker.io
  - registry.fedoraproject.org
  - quay.io
  - registry.access.redhat.com
  - registry.centos.org
store:
  ConfigFile: /home/rishi/.config/containers/storage.conf
  ContainerStore:
    number: 1
  GraphDriverName: overlay
  GraphOptions:
  - overlay.mount_program=/usr/bin/fuse-overlayfs
  GraphRoot: /home/rishi/.local/share/containers/storage
  GraphStatus:
    Backing Filesystem: extfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Using metacopy: "false"
  ImageStore:
    number: 1
  RunRoot: /run/user/1000
  VolumePath: /home/rishi/.local/share/containers/storage/volumes

Package info (e.g. output of rpm -q podman or apt list podman):

podman-1.5.1-3.fc29.x86_64

[haircommander]

this is a dup of #3903