X-Git-Url: https://git.sev.monster/~sev/dotfiles.git/blobdiff_plain/b133dc9212c5d15d32757135d46d28481bffac4f..715a3ed9b065c1709547bfcfa6828dbac8d23de3:/base/.zshenv?ds=inline diff --git a/base/.zshenv b/base/.zshenv index 819eb70..11cded7 100644 --- a/base/.zshenv +++ b/base/.zshenv @@ -1,57 +1,227 @@ -### exports for new non-interactive shell -if [[ $SHLVL == 1 ]] { +# WARN: not used in this repo, but gpgconf --list-dirs does not read +# gpg-agent.conf to get socket path, see dev.gnupg.org/T3108 + +### unset unwanted options that could be set in /etc/zshenv +unsetopt SH_WORD_SPLIT KSH_ARRAYS + +### check if su +if [[ -v _sev_olduser && $_sev_olduser != $USERNAME ]] _sev_reset_shell= +export _sev_olduser=$USERNAME + +### exports for all new shells +if [[ -v _sev_reset_shell || $SHLVL == 1 ]] { ## lang export CHARSET=UTF-8 - export LANG="en_US.UTF-8" - export LC_CTYPE="$LANG" + export LANG=en_US.UTF-8 + export LC_CTYPE=$LANG ## path + # path and fpath should already be linked to PATH and FPATH + # we don't want duplicates so turn on unique mode if it isn't already + typeset -U path fpath + # do not run more than once per session, even if resetting shell + if [[ $SHLVL == 1 ]] { + # take a backup before any customizations + export _sev_sys_PATH=$PATH + export _sev_sys_FPATH=$FPATH + } # /usr/{pkg,local,games} are unix/bsdisms - typeset -U PATH path path=({~/,/,/usr/}sbin {~/,/,/usr/}bin /usr/pkg/{s,}bin /usr/X11R{7,6}/bin - /usr/local/{s,}bin /usr/games "${path[@]}") - export PATH - typeset -U _sev_backup_path - _sev_backup_path=("${path[@]}") - typeset -U FPATH fpath - fpath=(${ZDOTDIR:-$HOME/.zsh}/functions/{*,Completions/*}(N) "${fpath[@]}") - export FPATH + /usr/local/{s,}bin /usr/games) + PATH=$PATH:$_sev_sys_PATH + fpath=(${ZDOTDIR:-$HOME/.zsh}/functions/{*,Completions/*}(N)) + # fpath is not exported by default + export FPATH=$FPATH:$_sev_sys_FPATH + # take another backup, explained in .zprofile + typeset -U _backup_path + _backup_path=("${path[@]}") ## xdg + # TODO: check for and merge existing XDG env vars export XDG_CONFIG_HOME=~/etc export XDG_CONFIG_DIRS=~/.config:/usr/pkg/etc/xdg:/usr/local/etc/xdg:/etc/xdg export XDG_DATA_HOME=~/share export XDG_DATA_DIRS=~/.local/share:/usr/pkg/share:/usr/local/share:/usr/share export XDG_CACHE_HOME=~/tmp export XDG_RUNTIME_DIR=~/tmp + if [[ -e $XDG_CONFIG_HOME/user-dirs.dirs ]] { + source $XDG_CONFIG_HOME/user-dirs.dirs + } - # create tmp link - t="${TMPDIR:-/tmp}/home-$LOGNAME" - h="$HOME/tmp" - if [[ ! -e "$t" ]] { - mkdir -m 700 "$t" > /dev/null 2>&1 - # TODO: check if dir exists after mkdir + ## create tmp link + t=${TMPDIR:-/tmp}/.home-$LOGNAME + if [[ ! -e $t ]] { + mkdir -m 700 $t 2>/dev/null + if [[ ! -d $t ]] { + [[ -o interactive ]] && + print -P "%F{red}!!! Can't create temp folder $t%f" + [[ -h $XDG_RUNTIME_DIR ]] && unlink $XDG_RUNTIME_DIR 2>/dev/null + [[ ! -e $XDG_RUNTIME_DIR ]] && mkdir $XDG_RUNTIME_DIR 2>/dev/null + } } # allow opaque entries to override link creation - if [[ ! -e "$h" ]] { - ln -sf "$t" "$h" > /dev/null 2>&1 + [[ ! -e $XDG_RUNTIME_DIR ]] && ln -sf $t $XDG_RUNTIME_DIR 2>/dev/null + unset t + + ## gpg forwarding + # NOTE: while ssh automatically sets SSH_AUTH_SOCK with the ForwardSsh + # directive, GPG must be forwarded manually. to support this, we + # forward the restricted gpg-agent extra socket to the remote host + # with a RemoteForward rule in ~/.ssh/config that uses the + # _GNUPG_SOCK_* env vars. + # to avoid conflicts with other ssh sessions where the same user is + # connecting to the same host from different machines, gpg in each + # environment should utilize its own forwarded socket, rather than + # replace the sockets in GNUPGHOME which will be overridden on the + # next connection. previously, you could provide a path to the agent + # socket in GPG_AGENT_INFO, but that was deprecated in GPG v2.1. + # instead, we must clone GNUPGHOME and replace the agent sockets + # there with the forwarded one. + # HACK: without SendEnv, which is disabled by default in most sshd configs, + # there is no foolproof way to prevent race conditions or filename + # collisions, pass the forward path to the remote host environment, + # or even know if the forward path exists and is writable. we just + # have to guess this path is good on the desination host, and assume + # the newest matching socket is the correct one after connecting. in + # theory we could occlude the ssh binary on PATH with an alias or + # script that communicates with the remote host before opening a + # shell, but that would open up too many edge cases where it wouldn't + # work to make it worth the effort and extra overhead. + # do not run more than once per session, even if resetting shell + if [[ $SHLVL == 1 && -v commands[gpg] ]] { + export _GNUPG_SOCK_DEST_BASE=/tmp/.gpg-agent-forward + export _GNUPG_SOCK_DEST_EXT=$(date +%s).$RANDOM + export _GNUPG_SOCK_DEST=$_GNUPG_SOCK_DEST_BASE.$_GNUPG_SOCK_DEST_EXT + _sev_gpg_forward_dir=${GNUPGHOME:-~/.gnupg}/.ssh_forward + s=($_GNUPG_SOCK_DEST_BASE*(N=oc[1])) + # clean up forwards if its session is dead or we ask for it + if [[ -d $_sev_gpg_forward_dir ]] { + find $_sev_gpg_forward_dir -type d -mindepth 1 -maxdepth 1 | + while read -r x; do + # NOTE: the only way we can get here is if we are SHLVL 1. if + # our own pid already has a dir, it is most likely stale, + # or something is very broken—assume the former. + p=$(basename $x) + if [[ -v _sev_gpg_forward_clean || $$ == $p ]] || + ! kill -0 $p 2>/dev/null; then + find $x -mindepth 1 -maxdepth 1 | while read -r y; do + unlink $y + done + rmdir $x + fi + done + unset x p y + } + # create new forward dir + if [[ -n $s && -v SSH_CLIENT ]] { + export _sev_gpg_forwarded= + mkdir -pm700 $_sev_gpg_forward_dir + h=$_sev_gpg_forward_dir/$$ + mkdir -pm700 $h + # XXX: is it safe to link scdaemon socket? can its name be changed? + for x in S.scdaemon gpg.conf gpg-agent.conf sshcontrol \ + pubring.kbx trustdb.gpg private-keys-v1.d crls.d; do + ln -s ${GNUPGHOME:-~/.gnupg}/$x $h + done + export GNUPGHOME=$h + unset h + for x in $(gpgconf --list-dirs | grep 'agent-.*-\?socket:'); do + # dirs are prefixed and percent-encoded—strip and decode + # https://stackoverflow.com/a/64312099 + x=${${x/#agent-*socket:/}//(#b)%([[:xdigit:]](#c2))/${(#):-0x$match[1]}} + if [[ ! -v orig ]] { + mv $s $x + orig=$x + } else { + ln -s $orig $x + } + done + unset x orig + } + unset s + + # what we will forward if we start a new ssh connection + # NOTE: do this after setting up GNUPGHOME to pick up new socket path; + # if already connected over SSH, extra should be the remote one + export _GNUPG_SOCK_SRC=$(gpgconf --list-dirs agent-extra-socket) + } else { + # required for RemoteForward to not error out if the vars are unset + export _GNUPG_SOCK_SRC=/nonexistent + export _GNUPG_SOCK_DEST=/nonexistent + } + + ## gpg agent + # always try to start agent during setup + if [[ SHLVL == 1 ]] { + gpg-connect-agent /bye >/dev/null 2>&1 + [[ $? -ne 0 && -o interactive ]] && + print -P "%F{red}!!! Can't communicate with GPG agent%f" + } + # set up tty if it isn't, and we're interactive or in xorg & not forwarded + # do not run more than once per session, even if resetting shell + if [[ -v commands[gpg-connect-agent] && + ! -v _sev_gpg_forward && ! -v GPG_TTY && + ( -o interactive || -v DISPLAY ) ]] { + export GPG_TTY=$(tty) + export PINENTRY_USER_DATA=USE_TTY=$((!${+DISPLAY})) + gpg-connect-agent UPDATESTARTUPTTY /bye >/dev/null 2>&1 } - unset t h -} -### gpg ssh forwarding -# these env vars are used as arguments to RemoteForward in ~/.ssh/config -if [[ -v commands[gpgconf] && ! ( -v _GNUPG_SOCK_SRC && -v _GNUPG_SOCK_DEST ) ]] { - # if already connected over SSH, reuse forwarded socket for future - # connections; else use extra socket - sock=${SSH_CLIENT:+agent-socket} - export _GNUPG_SOCK_SRC=$(gpgconf --list-dirs ${sock:-agent-extra-socket}) - # XXX: chance of race condition - export _GNUPG_SOCK_DEST=/tmp/.gpg-agent-forward - unset sock + ## ssh agents + # NOTE: preferred order of agents to check: okcagent, gnupg, openssh + # first block takes care of okcagent and openssh, second gnupg + [[ -o interactive ]] && print -nP "%F{blue}>>>%f SSH: %F{green}" + if [[ ! -v SSH_AUTH_SOCK && ( -v commands[okc-ssh-agent] || + ( -v commands[ssh-agent] && ! -v commands[gpg] ) ) ]] { + okc=${commands[okc-ssh-agent]:+okc-} + agentfile=~/tmp/${okc}ssh-agent-exports + typeset sock= + typeset -i pid= + if [[ -f $agentfile ]] { + IFS=$'\0' read -r sock pid <$agentfile + } + if [[ -S $sock && $pid > 0 ]] && kill -0 $pid; then + [[ -o interactive ]] && echo "Reusing agent PID $pid" + export SSH_AUTH_SOCK=$sock + export SSH_AGENT_PID=$pid + else + # TODO: ensure ssh-agent path looks legit + # to avoid unsafe eval? + # NOTE: no way around doing redirection like this I think + e=${okc}ssh-agent + if [[ -o interactive ]] { + eval `$e` + } else { + eval `$e` >/dev/null 2>&1 + } + echo -n $SSH_AUTH_SOCK$'\0'$SSH_AGENT_PID >!$agentfile + fi + unset okc agentfile sock pid + } elif [[ ! -v SSH_AUTH_SOCK && -v commands[gpg] ]] { + # since gpg agent was started above, we just have to export and notify + if [[ -o interactive ]] { + if [[ -v _sev_gpg_forwarded ]] { + echo 'Remote GPG agent' + } else { + gpg-connect-agent /subst /serverpid \ + '/echo GPG agent PID ${get serverpid}' /bye + } + } + export SSH_AUTH_SOCK=$(gpgconf --list-dirs agent-ssh-socket) + } elif [[ -v SSH_AUTH_SOCK ]] { + [[ -o interactive ]] && echo "Preconfigured agent" + } else { + [[ -o interactive ]] && print -P "%F{red}No agent available" + } } + ### load site-specific if [[ -f ~/.zshenv.local ]] { source ~/.zshenv.local } +### source .zprofile +# if we used su, without --login, let's run zprofile ourselves +# XXX: system zprofile is not run +if [[ -v _sev_reset_shell || $SHLVL == 1 ]] source ~/.zprofile + # vim: set et sts=4 sw=4 ts=8 tw=79 :