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Add escape for systemd service in installer script

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Among all the characters that are allowed in a URL, both the percentage
sign "%" and the single quotation mark "'" needs escaping when written
as a environment variable in a systemd service file. While the single
quotation mark may be rare, the percentage sign is widely used to escape
characters in a URL. This is especially common in proxy setting, where
username and password may contain special characters that need
percentage escaping. This patch applies the following replacements:

  % -> %%
  ' -> \'
This commit is contained in:
Sheng Yang 2023-01-14 03:46:11 +08:00
parent d21f54958e
commit 7c08144c4a
1 changed files with 6 additions and 1 deletions
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7
scripts/install-systemd-multi-user.sh
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@ -24,12 +24,17 @@ $1
EOF EOF
} }
escape_systemd_env() {
temp_var="${1//\'/\\\'}"
echo "${temp_var//\%/%%}"
}
# Gather all non-empty proxy environment variables into a string # Gather all non-empty proxy environment variables into a string
create_systemd_proxy_env() { create_systemd_proxy_env() {
vars="http_proxy https_proxy ftp_proxy no_proxy HTTP_PROXY HTTPS_PROXY FTP_PROXY NO_PROXY" vars="http_proxy https_proxy ftp_proxy no_proxy HTTP_PROXY HTTPS_PROXY FTP_PROXY NO_PROXY"
for v in $vars; do for v in $vars; do
if [ "x${!v:-}" != "x" ]; then if [ "x${!v:-}" != "x" ]; then
echo "Environment=${v}=${!v}" echo "Environment=${v}=$(escape_systemd_env ${!v})"
fi fi
done done
} }