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128 lines
3.0 KiB
Bash
Executable File
128 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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#
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# script: set_proxy
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#
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# Copyright 2005-2024, Lime Technology
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#
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# call this script (/usr/local/sbin/set_proxy) when /boot/config/proxy.cfg changes
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# proxy.cfg is the source of all proxy information
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CFG=/boot/config/proxy.cfg
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# these files are generated by this script based on the data in proxy.cfg
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PROXY_SH=/etc/profile.d/proxy.sh
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PROXY_INI=/usr/local/emhttp/state/proxy.ini
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# random file extension for atomic writes
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RND=$RANDOM
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VERBOSE=
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[[ "$1" == "-v" ]] && VERBOSE=1
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# global vars defined later
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proxy_active=
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proxy_url=
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no_proxy=
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# write environment variables to /etc/profile.d/proxy.sh
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set_proxy_sh() {
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local FILE
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FILE="${PROXY_SH}"
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cat <<EOF >"${FILE}.${RND}"
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#!/bin/bash
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# Do not edit. This file is autogenerated by /usr/local/sbin/set_proxy
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export http_proxy="${proxy_url}"
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export https_proxy="${proxy_url}"
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export no_proxy="${no_proxy}"
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EOF
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chmod 755 "${FILE}.${RND}"
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mv "${FILE}.${RND}" "${FILE}"
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}
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# clear environment variables from /etc/profile.d/proxy.sh
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unset_proxy_sh() {
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local FILE
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FILE="${PROXY_SH}"
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cat <<EOF >"${FILE}.${RND}"
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#!/bin/bash
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# Do not edit. This file is autogenerated by /usr/local/sbin/set_proxy
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unset http_proxy
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unset https_proxy
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unset no_proxy
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EOF
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chmod 755 "${FILE}.${RND}"
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mv "${FILE}.${RND}" "${FILE}"
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}
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set_proxy_ini() {
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local FILE
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FILE="${PROXY_INI}"
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cat <<EOF >"${FILE}.${RND}"
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http_proxy="${proxy_url}"
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https_proxy="${proxy_url}"
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no_proxy="${no_proxy}"
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EOF
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chmod 644 "${FILE}.${RND}"
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mv "${FILE}.${RND}" "${FILE}"
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}
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# clear /usr/local/emhttp/state/proxy.ini
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unset_proxy_ini() {
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# vars are empty now, call set_proxy_ini to add empty vars to proxy.ini
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set_proxy_ini
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}
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# generate proxy files
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add_proxy_to_generated_files_and_exit() {
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echo "generating proxy files"
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set_proxy_sh
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set_proxy_ini
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[[ -n "${VERBOSE}" ]] && display_generated_files
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exit 0
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}
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# remove proxy info from all generated files and exit
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remove_proxy_from_generated_files_and_exit() {
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echo "removing proxy info from generated files"
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unset_proxy_sh
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unset_proxy_ini
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[[ -n "${VERBOSE}" ]] && display_generated_files
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exit 0
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}
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# when verbose mode enabled
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display_generated_files() {
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echo
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display_generated_file "${PROXY_SH}"
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display_generated_file "${PROXY_INI}"
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}
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# when verbose mode enabled
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display_generated_file() {
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local FILE
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FILE=$1
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echo "${FILE}"
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[[ -f "${FILE}" ]] && cat "${FILE}" || echo "file does not exist"
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echo
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}
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# if no proxy config, remove proxy info from all generated files and exit
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[[ ! -f "${CFG}" ]] && remove_proxy_from_generated_files_and_exit
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# read current proxy information from /boot/config/proxy.cfg
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# shellcheck source=/dev/null
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. <(/usr/bin/fromdos <"${CFG}")
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# determine proxy information
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proxy_url_var="proxy_url_${proxy_active:=}"
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proxy_url="${!proxy_url_var}"
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# if no active proxies, remove proxy info from all generated files and exit
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if [[ "${proxy_active:=0}" == "0" || "${proxy_url}" == "" ]]; then
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remove_proxy_from_generated_files_and_exit
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fi
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# proxies are defined, write generated files
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no_proxy="127.0.0.1,localhost"
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add_proxy_to_generated_files_and_exit
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