You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.4 KiB
43 lines
1.4 KiB
#!/bin/bash
|
|
# this file is meant to be sourced, not executed directly
|
|
|
|
# if destination argument is not provided, fail
|
|
if [[ $# -lt 1 ]]; then
|
|
echo "$(basename $BASH_SOURCE): error: no destination provided!" >&2
|
|
return 1
|
|
elif [[ $# -gt 1 ]]; then
|
|
echo "$(basename $BASH_SOURCE): error: too many arguments!" >&2
|
|
return 1
|
|
fi
|
|
|
|
# provide sshp command for executing commands on remote computer
|
|
sshp() {
|
|
echo "$@" >&$_sshp_in
|
|
echo "echo EOF" >&$_sshp_in
|
|
sed '/EOF/Q' <$_sshp_out
|
|
}
|
|
|
|
# assign dest to variable
|
|
_sshp_dest=$1
|
|
# create temporary directory
|
|
_sshp_tmpdir=$(mktemp -d)
|
|
mkfifo $tempdir/in $tempdir/out
|
|
_sshp_out=$_sshp_tmpdir/out
|
|
# assign input to a file descriptor so it doesn't get closed
|
|
exec {_sshp_in}<>$tempdir/in
|
|
# trap exit to do cleanup
|
|
trap "{ exec {_sshp_in}>&-; ssh -O exit -S $_sshp_tmpdir/ssh $_sshp_dest &>/dev/null; rm -rf $tempdir; }" EXIT
|
|
# login with master so ssh can ask password if necessary
|
|
ssh -M -Nf -S $tempdir/ssh $_sshp_dest
|
|
# login with redirection for the persistent connection
|
|
ssh -S $tempdir/ssh medusa 0<&$_sshp_in 1>$_sshp_out 2>$_sshp_out &
|
|
# clear output
|
|
sshp true &> /dev/null
|
|
# ask for password and run sudo so password can be cached
|
|
(printf "[sudo] password for $(remote echo \$USER)@$(remote hostname): "
|
|
read -s password
|
|
printf '\n'
|
|
echo "sudo -S true" >&3
|
|
echo $password >&3)
|
|
# clear output
|
|
sshp true &> /dev/null
|
|
|