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https://github.com/tildeclub/launcher.git
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rename to tilde
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Ben Harris
284
tilde
Executable file
284
tilde
Executable file
@@ -0,0 +1,284 @@
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#!/usr/bin/env bash
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# ---------------------------------------------------------------------------
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# tilde - manage user-submitted scripts
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# forked from tilde.team
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# Copyright 2018-2019, Ben Harris <ben@tilde.team>
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# Copyright 2019, Sven Kinne <creme@envs.net>
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License at <http://www.gnu.org/licenses/> for
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# more details.
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# Usage: tilde [-h|--help]
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# ---------------------------------------------------------------------------
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export TERM=xterm-256color
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PROGNAME=${0##*/}
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VERSION="0.0.5"
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INFO_FILE="/home/$(id -un)/.tilde"
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###
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clean_up() { # Perform pre-exit housekeeping
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return
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}
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error_exit() {
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echo -e "${1:-"unknown Error"}" >&2
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clean_up
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exit 1
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}
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graceful_exit() {
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clean_up
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exit
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}
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signal_exit() { # Handle trapped signals
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case $1 in
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INT)
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error_exit "program interrupted by user" ;;
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TERM)
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printf '\n%s: program terminated\n' "$PROGNAME" >&2
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graceful_exit ;;
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*)
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error_exit "$PROGNAME: terminating on unknown signal" ;;
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esac
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}
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prompt_confirm() {
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while true; do
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read -r -n 1 -p "${1:-continue?} [y/n]: " REPLY
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case "$REPLY" in
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[yY]) echo ; return 0 ;;
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[nN]) echo ; return 1 ;;
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*) printf ' \033[31m %s \n\033[0m' "invalid input"
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esac
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done
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}
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usage() {
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printf '\n%sUser Scripts%s\n' "$(tput setaf 6)" "$(tput sgr0)"
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printf '\nusage: %s [help|list|submit|about|script_name]\n' "$PROGNAME"
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printf ' %s list - show a list of approved userscripts\n' "$PROGNAME"
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printf ' %s submit - start the submission flow for your own script\n' "$PROGNAME"
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[[ $(id -u) == 0 ]] && {
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printf ' %s approve - enter the approval queue\n' "$PROGNAME"
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printf ' %s revoke <script_name> - send a script back to the author and remove from /tilde/bin\n' "$PROGNAME"
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}
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printf ' %s about <script_name> - get the description for script_name\n' "$PROGNAME"
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printf ' %s <script_name> - run script_name with all remaining args are passed to the script\n' "$PROGNAME"
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if [[ :$PATH: != *:"/tilde/bin":* ]] ; then
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printf "\nadd /tilde/bin to your PATH to use approved scripts without this wrapper\n"
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printf "if you're using bash, run the following to add it quickly\n"
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printf " echo 'export PATH=\$PATH:/tilde/bin' >> ~/.bashrc && source ~/.bashrc\n"
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fi
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}
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help_message() {
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cat <<- EOF
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$(tput setaf 6)$PROGNAME (ver. $VERSION)$(tput sgr0)
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wrapper for user-submitted scripts
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supports user settings, submission and admin approval
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$(usage)
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EOF
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return
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}
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verify_script_name() {
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[[ $1 == "" ]] && error_exit "please start over and enter the script name"
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if [[ "$(type "$1" > /dev/null 2>&1)" ]]; then
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error_exit "$1 already exists. rename your script and try again."
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fi
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[[ -x /tilde/bin/"$1" ]] && error_exit "$1 is already taken. rename your script and try again."
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case "$1" in
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help|about|description|desc|list|ls|submit|apropos|approve|revoke|show)
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error_exit "$1 is a subcommand of tilde. rename your script and try again.";;
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*)
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return;;
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esac
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}
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submission_checklist() {
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cat <<- EOF
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requirements for submitting a user script or program:
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- placed in your ~/bin
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- executable
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- responds to help or --help
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- no name collisions with existing scripts or $PROGNAME subcommands
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EOF
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}
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mail_body() {
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cat <<- EOF
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Subject: tilde script submission from $USER
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From: $USER@tilde.club
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To: root@tilde.club
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tilde script submission from $USER
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script name: $1
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description:
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-----------------------------------------------------------------------
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$2
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-----------------------------------------------------------------------
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you'll find the script and description in: /tilde/pending-submissions/$USER/$1
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run this to see the approval queue:
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sudo tilde approve
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EOF
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}
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# Trap signals
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trap "signal_exit TERM" TERM HUP
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trap "signal_exit INT" INT
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# Parse command-line
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case "$1" in
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-h | --help | help)
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help_message; graceful_exit
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;;
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-v | --version)
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printf '%s\n' "$VERSION"
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;;
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'-*' | '--*')
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usage
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error_exit "Unknown option $1"
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;;
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list | ls)
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printf 'available scripts:\n\n'
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for scr in /tilde/bin/*; do
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script_name=$(basename "$scr")
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target=$(readlink -f "$scr")
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printf '%s%s by %s%s\n' "$(tput setaf 6)" "$script_name" "$(stat -c '%U' "$target")" "$(tput sgr0)"
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cat /tilde/descriptions/"$script_name"
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printf '\n'
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done
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;;
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about | apropos | description | desc)
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if [[ -f /tilde/descriptions/"$2" ]]; then
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cat /tilde/descriptions/"$2"
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else
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printf '%s not found. try %s list to see available user scripts.\n' "$2" "$PROGNAME"
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fi
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;;
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submit)
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printf "hello, %s! so it's time to submit your script?\n" "$USER"
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submission_checklist
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prompt_confirm "are you ready to continue?" || graceful_exit
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printf 'enter the name of your script: '
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read -r script_name
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verify_script_name "$script_name"
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if [[ -x "$HOME"/bin/"$script_name" ]]; then
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printf '\ncool, found your script\n'
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[[ -x /tilde/pending-submissions/"$USER"/"$script_name"/"$script_name" ]] && error_exit "you've already submitted $script_name"
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else
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error_exit "$script_name not found in ~/bin"
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fi
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printf 'enter a description of your script:\n'
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read -r description
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printf '\nyour script, along with your description will be sent to the admins for approval\n'
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prompt_confirm "ready to submit?" || graceful_exit
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# submit now
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mkdir -p /tilde/pending-submissions/"$USER"/"$script_name"
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ln -s "$HOME"/bin/"$script_name" /tilde/pending-submissions/"$USER"/"$script_name"/"$script_name"
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echo "$description" > /tilde/pending-submissions/"$USER"/"$script_name"/description.txt
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mail_body "$script_name" "$description" | /usr/sbin/sendmail root
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printf 'script submitted. thanks! :)\n'
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;;
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approve)
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[[ $(id -u) != 0 ]] && error_exit "re-run this as sudo to access the approval queue"
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printf 'welcome to the approval queue\n\n'
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for user in /tilde/pending-submissions/*; do
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for scr in "$user"/*; do
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user="$(basename "$user")"
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script_name="$(basename "$scr")"
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[[ -f $scr/approved ]] && continue
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script="$scr"/"$script_name"
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printf '%s by %s\n' "$script_name" "$user"
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cat "$scr"/description.txt
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prompt_confirm "approve?" || continue
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sudo ln -s "$(readlink -f "$script")" /tilde/bin/"$script_name"
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sudo cp "$scr"/description.txt /tilde/descriptions/"$script_name"
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sudo touch "$scr"/approved
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sudo chmod 664 /tilde/descriptions/*
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echo "your submission of $script_name has been approved and is now available at /tilde/bin/$script_name" | /usr/sbin/sendmail "$user"
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done
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done
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echo "~~done for now~~"
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;;
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revoke)
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[[ "$(id -u)" != 0 ]] && error_exit "re-run this as sudo to access the revoke menu"
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[[ -f /tilde/bin/"$2" ]] || error_exit "$2 isn't an approved script"
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prompt_confirm "revoke $2?"
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printf 'please provide a reason: '
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read -r reason
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original_script="$(readlink -f /tilde/bin/"$2")"
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author="$(stat -c '%U' "$original_script")"
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sudo rm /tilde/{bin,descriptions}/"$2"
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sudo rm -rf /tilde/pending-submissions/"$author"/"$2"
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echo -e "your script $2 has been returned because: $reason\nfeel free to resubmit" | /usr/sbin/sendmail "$author"
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printf '%s revoked and returned to author\n' "$2"
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;;
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*)
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if [[ -x /tilde/bin/"$1" ]]; then
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prog=/tilde/bin/"$1"
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shift
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$prog "$@"
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graceful_exit
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else
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[[ "$1" == "" ]] || printf "%s not found. try %s list to see what's available\n" "$1" "$PROGNAME"
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help_message; graceful_exit;
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fi
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;;
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esac
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#
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graceful_exit
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Block a user