241 lines
7.7 KiB
Bash
241 lines
7.7 KiB
Bash
#!/bin/bash
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module_load ssh
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module_load bundle
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module_load helpers
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module_load ssh-copy
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remote_function () {
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[[ $2 ]] && module_load $2
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if declare -f $1; then
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local file
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file=$(mkrfilename function)
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$(declare -f $1) > $file
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echo $file
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else
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>&2 echo fatal: unable to source funtion $1, aborting
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return 1
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fi
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}
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remote_script () {
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local sshargs;local user;local supass;local cfn; local rfn; local args;
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local script; local host; local dr; local supass; local env_vars;
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local login; local slogin; local shell=bash; local sargs
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local hostname; local bscript; local ruser; local usesudo; local save
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help() {
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cat <<EOF
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usage: remote_script <remote_script options> host script <script args> -- <ssh script options>
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host and script are required, script can be either path to a file containing a script to a UCI module
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-f, <func> run a function in the passed script, otherwise script is assumed to be bash executed.
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-x, <func> create script of just a function from some script file or module
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| will automatically set -f to run that function.
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-b <shell> use another shell processor other than default bash
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-d, dry run. don't run the rscript just output the command that will be run
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-u, <ruser> remote user to run script as. default is ssh host user or root if using sudo.
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| if -u is other than ssh login user then -s or -p must be set
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-s, execute remote script using sudo
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-p, <supass> sudo password. If set the remote command will be run as root or the user of -u <user>
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| if command has 'ssh script option' of '-- -p <upasswd>' and -s is set this will set -p <upasswd> automatically
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-l, use login shell on remote
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-e, <SOME_VAR="some value"> set some environment variables to run. Can be used more than once for multiple values
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-h, this help text
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EOF
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}
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debug $( ( IFS=$','; echo all arguments: "$*" ) )
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for ((d=1; d<$#+1; ++d)); do
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# echo in loop $d, ${!d}
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[[ ${!d} == "--" ]] && sargs=true && break
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done
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if [[ $sargs ]]; then # if there are extra ssh arguments
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sshargs=("${@:$d+1:$#}")
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debug $( ( IFS=$','; echo "ssh arguments: ${sshargs[*]}" ) )
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set -- "${@:1:$d-1}"
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# args=("${@:1:$d-1}")
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debug $( ( IFS=$','; echo remaining arguments to parse: "$*" ) )
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else
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set -- "${@:1}"
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# args=("${@:1}")
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fi
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# echo pre ssh args: "$@"
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# echo args "${args[@]}"
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# parse remote_script options
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local OPTION
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local OPTARG
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local OPTIND
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while getopts 'b:le:hdu:sf:p:x:' OPTION; do
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# echo OPTION $OPTION ARG $OPTARG INDX $OPTIND
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case "$OPTION" in
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s)
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# using sudo, password will come from ssh user password or if you supply it with -p
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usesudo=true
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;;
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b)
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# use another shell the than default bash
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shell="$OPTARG"
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;;
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f)
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# run a function within the script
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# any function arguments appear after script
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cfn="-f $OPTARG"
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;;
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d)
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# dry run
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dr=true
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;;
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e)
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env_vars+=" $(escape_spaces "$OPTARG")"
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;;
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u)
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# run remote command as another user
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ruser=$OPTARG
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# usesudo=true
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;;
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l)
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login="-l"
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;;
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x)
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rfn=$OPTARG
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;;
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p)
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supass=$OPTARG
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;;
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h)
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help
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return 0
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;;
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*)
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>&2 echo fatal: unknown remote script option $OPTION, aborting
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help
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return 1
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;;
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esac
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done
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shift $((OPTIND - 1))
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[[ $# -lt 1 ]] && echo fatal: remote_script requires a 'host' && help && return 1
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host=$1; shift 1
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[[ ! $host ]] && echo fatal: no host was passed unable to excute a remote script && return 3
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user=$(get_user_host $host)
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[[ ! $user ]] && echo fatal: unable to determine user at host $host, aborting remote script && return 4
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hostname=$(get_hostname_host $host)
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# script can come from
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if [[ $rfn ]]; then
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# if ! declare -f $rfn >/dev/null; then
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# if ! module_load $1; then
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# [[ -f $1 ]] && source $1
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# fi
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if ! declare -f $rfn >/dev/null; then echo fatal: remote-script, unable to extract funtion $rfn, aborting; return 1; fi
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# # a passed script was used
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# shift
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# fi
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script=$(mkrfilename temp_function)
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declare -f $rfn > $script
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cfn="-f $rfn"
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else
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script=$1
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shift 1
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fi
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[[ ! $script ]] && echo fatal: must pass a script to remote run && help && return 1
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debug echo host: $host user: $user hostname:$hostname script:$script function to run: $cfn
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bscript=$(mkrfilename bundle_script )
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if ! bundle -c $cfn $script $bscript; then
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>&2 echo fatal: remote_script unable to bundle script for sending, aborting; return 1;
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fi
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if [[ $usesudo ]] || [[ $supass ]]; then
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[[ $usesudo ]] && supass=$(parse_option "${sshargs[*]}" -p)
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if [[ $supass ]]; then
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[[ $login ]] && slogin="-i"
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usesudo="echo '${supass}' | sudo $slogin -u ${ruser:-root} --stdin 2>/dev/null"
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echo remote script to be run as ${ruser:-root} using sudo
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else
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echo sudo requested but no sudo password supplied, aborting
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return 5
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fi
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fi
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debug remote script arguments $(escape_args "$@")
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debug ssh arguments $(escape_args "${sshargs[@]}")
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rscript=${save:-$(mkrfilename REMOTE_SCRIPT)}
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# sshcp -y -d $host $bscript $rscript -- "${sshargs[@]}"
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# return
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if sshcp -d $host $bscript $rscript -- "${sshargs[@]}"; then
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# make remote script excuteable
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ssh "${sshargs[@]}" "$host" "chmod +x $rscript"
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ssh "${sshargs[@]}" "$host" "$usesudo" "$env_vars" "$shell" $login "$rscript" "$(escape_args "$@")"
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# now delete it, save script if passed an explicit name
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if ! ssh "${sshargs[@]}" $host rm -f $rscript; then echo unable to delete temporary remote file at $host:$rscript; fi
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# ssh "${sshargs[@]}" "$host" "cat $rscript"
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else
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>&2 echo fatal: remote_script failed because script could not be copied; return 1;
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fi
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rm -f $bscript
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[[ $rfn ]] && [[ "${script}" =~ "temp_function" ]] && rm -f $script
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}
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# END REMOTE SCRIPT
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# # if script was executed then call the function
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(return 0 2>/dev/null) ||remote_script $@
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# can be used with a file or HEREDOC
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# todo test with < $file or with a pipe
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remote_stdin () {
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local file
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echo "remote send multiple commands for cli, type commands"
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echo "then cntrl-d to end and send"
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file=$( mkrfilename remote_script )
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cat > $file
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remote_script $1 "$file" "$@"
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rm -f $file &> /dev/null
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}
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remote_test () {
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local pass
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echo "to run: remote_test host password"
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[[ $2 ]] && pass="-- -p $2"
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echo "------------ test one, no login shell, regular user ------------------"
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echo "running: remote_script -f -x remote_test_script -e ENV_TEST="test env variable" $1 remote arg1 "arg 2" arg3 arg4 $pass"
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remote_script -x remote_test_script -e ENV_TEST="test env variable" $1 remote arg1 "arg 2" arg3 arg4 $pass
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echo "------------ test two, login shell, regular user ------------------"
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remote_script -l -x remote_test_script -e ENV_TEST="test env variable" $1 remote arg1 "arg 2" arg3 arg4 $pass
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echo "------------ test three, no login shell, root/sudo user ------------------"
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remote_script -s -x remote_test_script -e ENV_TEST="test env variable" $1 remote arg1 "arg 2" arg3 arg4 $pass
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echo "------------ test four, login shell, root/sudo user ------------------"
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remote_script -s -l -x remote_test_script -e ENV_TEST="test env variable" $1 remote arg1 "arg 2" arg3 arg4 $pass
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echo "-------------------- done tests ----------------"
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}
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remote_test_script () {
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shopt -q login_shell && echo 'Login shell' || echo 'Not login shell'
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env | grep SHELL_BASE
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echo ENV_TEST: $ENV_TEST
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echo running on machine: $(hostnamectl hostname)
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echo as user:home $(whoami):$HOME
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echo argument1 $1
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echo argument2 $2
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echo remaining arguments: "${@:3}"
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}
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