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|
# Open a TCP session, add it to the list, handle it with zle if that's running.
# Unless using -a, -f, -l or -s, first two arguments are host and port.
#
# Remaining argument, if any, is the name of the session, which mustn't
# clash with an existing one. If none is given, the number of the
# connection is used (i.e. first connection is 1, etc.), or the first
# available integer if that is already in use.
#
# Session names, whether provided on the command line or in the
# .ztcp_sessions file should not be `clever'. A clever name is one
# with characters that won't work. This includes whitespace and an
# inconsistent set of punctuation characters. If in doubt, stick
# to alphanumeric, underscore and non-initial hyphen.
#
# -a fd Accept a connection on fd and make that the session.
# This will block until a successful incoming connection is received.
#
# fd is probably a value returned by ztcp -l; no front-end
# is currently provided for that but it should simply be
# a matter of calling `ztcp -l port' and storing $REPLY, then
# closing the listened port with `ztcp -c $stored_fd'.
#
# -f fd `Fake' tcp connection on the given file descriptor. This
# could be, for example, a file descriptor already opened to
# a named pipe. It should not be a regular file, however.
# Note that it is not a good idea for two different sessions
# to be attempting to read from the same named pipe, so if
# both ends of the pipe are to be handled by zsh, at least
# one should use the `-z' option.
#
# -l sesslist
# -s sessname
# Open by session name or comma separated list; either may
# be repeated as many times as necessary. The session must be
# listed in the file ${ZDOTDIR:-$HOME}/.ztcp_sessions. Lines in
# this file look exactly like a tcp_open command line except the
# session name is at the start, for example
# sess1 pwspc 2811
# has the effect of
# tcp_open pwspc 2811 sess1
# Remaining arguments (other than options) to tcp_open are
# not allowed. Options in .ztcp_sessions are not handled.
# The file must be edited by hand.
#
# -z Don't install a zle handler for reading on the file descriptor.
# Otherwise, if zle is enabled, the file descriptor will
# be tested while at the shell prompt and any input automatically
# printed in the same way as job control notification.
#
# If a session is successfully opened, and if the function `tcp_on_open'
# exists, it is run with the arguments session_name, session_fd.
emulate -L zsh
setopt extendedglob cbases
zmodload -i zsh/net/tcp || return 1
autoload -U zgprintf tcp_alias tcp_close tcp_command tcp_expect tcp_fd_handler
autoload -U tcp_log tcp_output tcp_proxy tcp_read tcp_rename tcp_send
autoload -U tcp_sess tcp_spam tcp_talk tcp_wait
local opt accept fake nozle sessfile sess quiet
local -a sessnames sessargs
integer stat
while getopts "a:f:l:qs:z" opt; do
case $opt in
(a) accept=$OPTARG
if [[ $accept != [[:digit:]]## ]]; then
print "option -a takes a file descriptor" >&2
return 1
fi
;;
(f) fake=$OPTARG
if [[ $fake != [[:digit:]]## ]]; then
print "option -f takes a file descriptor" >&2
return 1
fi
;;
(l) sessnames+=(${(s.,.)OPTARG})
;;
(q) quiet=1
;;
(s) sessnames+=($OPTARG)
;;
(z) nozle=1
;;
(*) return 1
;;
esac
done
(( OPTIND > 1 )) && shift $(( OPTIND - 1 ))
(( ${+tcp_by_fd} )) || typeset -gA tcp_by_fd
(( ${+tcp_by_name} )) || typeset -gA tcp_by_name
typeset -A sessassoc
if (( ${#sessnames} )); then
if [[ $# -ne 0 || -n $accept || -n $fake ]]; then
print "Incompatible arguments with \`-s' option." >&2
return 1
fi
for sess in ${sessnames}; do
sessassoc[$sess]=
done
sessfile=${ZDOTDIR:-$HOME}/.ztcp_sessions
if [[ ! -r $sessfile ]]; then
print "No session file: $sessfile" >&2
return 1
fi
while read -A sessargs; do
[[ ${sessargs[1]} = '#'* ]] && continue
if (( ${+sessassoc[${sessargs[1]}]} )); then
sessassoc[${sessargs[1]}]="${sessargs[2,-1]}"
fi
done < $sessfile
for sess in ${sessnames}; do
if [[ -z $sessassoc[$sess] ]]; then
print "Couldn't find session $sess in $sessfile." >&2
return 1
fi
done
else
if [[ -z $accept && -z $fake ]]; then
if (( $# < 2 )); then
set -- wrong number of arguments
else
host=$1 port=$2
shift $(( $# > 1 ? 2 : 1 ))
fi
fi
if [[ -n $1 ]]; then
sessnames=($1)
shift
else
sessnames=($(( ${#tcp_by_fd} + 1 )))
while [[ -n $tcp_by_name[$sessnames[1]] ]]; do
(( sessnames[1]++ ))
done
fi
sessassoc[$sessnames[1]]="$host $port"
fi
if (( $# )); then
print "Usage: $0 [-z] [-a fd | -f fd | host port [ session ] ]
$0 [-z] [ -s session | -l sesslist ] ..." >&2
return 1
fi
local REPLY fd
for sess in $sessnames; do
if [[ -n $tcp_by_name[$sess] ]]; then
print "Session \`$sess' already exists." >&2
return 1
fi
sessargs=()
if [[ -n $fake ]]; then
fd=$fake;
else
if [[ -n $accept ]]; then
ztcp -a $accept || return 1
else
sessargs=(${=sessassoc[$sess]})
ztcp $sessargs || return 1
fi
fd=$REPLY
fi
tcp_by_fd[$fd]=$sess
tcp_by_name[$sess]=$fd
[[ -o zle && -z $nozle ]] && zle -F $fd tcp_fd_handler
if [[ -z $quiet ]]; then
if (( ${#sessargs} )); then
print "Session $sess" \
"(host $sessargs[1], port $sessargs[2] fd $fd) opened OK."
else
print "Session $sess (fd $fd) opened OK."
fi
fi
# needed for new completion system, so I'm not too sanguine
# about requiring this here...
if zmodload -i zsh/parameter; then
if (( ${+functions[tcp_on_open]} )); then
tcp_on_open $sess $fd
fi
fi
done
if [[ -z $TCP_SESS ]]; then
[[ -z $quiet ]] && print "Setting default TCP session $sessnames[1]"
TCP_SESS=$sessnames[1]
fi
return $stat
|
