c49d1fbaba
In Tailscale SSH, we clear the local environment before running the
incubator process, which means that the incubator starts without a
LANG/LC_* environment variable passed from the `tailscaled` parent. In
the child, we don't use PAM, and thus never load environment variables
specified by pam_env.so. Additionally, our previous implementation of
envForUser didn't set a `LANG` variable by default.
On systems where we are capable of using the `login` or `su` commands to
create a login shell, the launched shell will read these environment
variables (e.g. from /etc/default/locale). However, this doesn't apply
in all cases:
1. Where we handle SSH in-process (handleSSHInProcess), e.g. due to
SELinux being enabled.
2. Where we are able to use `su` or `login`, but where the user's
shell *isn't Bash* (see below).
In such cases, we'd launch a process without a LANG/LC_* environment
set, possibly mangling output for the user.
One thing I discovered while testing this: on some distros, Bash is
compiled with the SSH_SOURCE_BASHRC option. If set, and if the bash
process is both the parent shell and the SSH_CLIENT variable is set,
Bash loads the ~/.bashrc environment variable *even if it's not an
interactive shell*. This is part of the reason that
`ssh user@host cmd` works if `cmd` isn't in the system-default $PATH
variable.
However, since this is a bash-specific configuration, if the user's
shell is set to something else (zsh, etc.), we would never execute the
~/.zshrc file and thus never set LANG (or similar).
(I also added a comment documenting this)
It should essentially always be safe to set the LANG environment
variable if not otherwise specified, and it's reset by both the `login`
and `su` command (tested on Ubuntu).
Updates #TODO
Signed-off-by: Andrew Dunham <andrew@tailscale.com>
|
||
|---|---|---|
| .bencher | ||
| .github | ||
| appc | ||
| atomicfile | ||
| chirp | ||
| client | ||
| clientupdate | ||
| cmd | ||
| control | ||
| derp | ||
| disco | ||
| docs | ||
| doctor | ||
| drive | ||
| envknob | ||
| feature | ||
| gokrazy | ||
| health | ||
| hostinfo | ||
| internal | ||
| ipn | ||
| jsondb | ||
| k8s-operator | ||
| kube | ||
| licenses | ||
| log | ||
| logpolicy | ||
| logtail | ||
| metrics | ||
| misc | ||
| net | ||
| omit | ||
| packages/deb | ||
| paths | ||
| portlist | ||
| posture | ||
| prober | ||
| proxymap | ||
| release | ||
| safesocket | ||
| safeweb | ||
| scripts | ||
| sessionrecording | ||
| ssh/tailssh | ||
| syncs | ||
| tailcfg | ||
| tempfork | ||
| tka | ||
| tool | ||
| tsconsensus | ||
| tsconst | ||
| tsd | ||
| tsnet | ||
| tstest | ||
| tstime | ||
| tsweb | ||
| types | ||
| util | ||
| version | ||
| wf | ||
| wgengine | ||
| wif | ||
| words | ||
| .gitattributes | ||
| .gitignore | ||
| .golangci.yml | ||
| .stignore | ||
| ALPINE.txt | ||
| api.md | ||
| assert_ts_toolchain_match.go | ||
| build_dist.sh | ||
| build_docker.sh | ||
| cache_key_test.go | ||
| CODE_OF_CONDUCT.md | ||
| CODEOWNERS | ||
| Dockerfile | ||
| Dockerfile.base | ||
| flake.lock | ||
| flake.nix | ||
| go.mod | ||
| go.mod.sri | ||
| go.sum | ||
| go.toolchain.branch | ||
| go.toolchain.next.branch | ||
| go.toolchain.next.rev | ||
| go.toolchain.rev | ||
| go.toolchain.rev.sri | ||
| go.toolchain.version | ||
| gomod_test.go | ||
| header.txt | ||
| LICENSE | ||
| license_test.go | ||
| Makefile | ||
| PATENTS | ||
| pkgdoc_test.go | ||
| pull-toolchain.sh | ||
| README.md | ||
| SECURITY.md | ||
| shell.nix | ||
| staticcheck.conf | ||
| update-flake.sh | ||
| version_tailscale_test.go | ||
| version_test.go | ||
| version-embed.go | ||
| VERSION.txt | ||
Tailscale
Private WireGuard® networks made easy
Overview
This repository contains the majority of Tailscale's open source code.
Notably, it includes the tailscaled daemon and
the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows,
macOS, and to varying degrees
on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's
code, but this repo doesn't contain the mobile GUI code.
Other Tailscale repos of note:
- the Android app is at https://github.com/tailscale/tailscale-android
- the Synology package is at https://github.com/tailscale/tailscale-synology
- the QNAP package is at https://github.com/tailscale/tailscale-qpkg
- the Chocolatey packaging is at https://github.com/tailscale/tailscale-chocolatey
For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.
Using
We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.
Other clients
The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.
Building
We always require the latest Go release, currently Go 1.26. (While we build releases with our Go fork, its use is not required.)
go install tailscale.com/cmd/tailscale{,d}
If you're packaging Tailscale for distribution, use build_dist.sh
instead, to burn commit IDs and version info into the binaries:
./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled
If your distro has conventions that preclude the use of
build_dist.sh, please do the equivalent of what it does in your
distro's way, so that bug reports contain useful version information.
Bugs
Please file any issues about this code or the hosted service on the issue tracker.
Contributing
PRs welcome! But please file bugs. Commit messages should reference bugs.
We require Developer Certificate of
Origin
Signed-off-by lines in commits.
See commit-messages.md (or skim git log) for our commit message style.
About Us
Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:
- https://github.com/tailscale/tailscale/graphs/contributors
- https://github.com/tailscale/tailscale-android/graphs/contributors
Legal
WireGuard is a registered trademark of Jason A. Donenfeld.