38 lines
1.0 KiB
Bash
Executable File
38 lines
1.0 KiB
Bash
Executable File
#!/bin/sh -e
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# this variable is only set if the usepeerdns pppd option is being used
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[ "$USEPEERDNS" ] || exit 0
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# exit if the resolvconf package is installed
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[ -x /sbin/resolvconf ] && exit 0
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# exit if systemd-resolved is running
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[ -e /run/systemd/system ] && \
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systemctl is-active --quiet systemd-resolved.service &&
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exit 0
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# create the file if it does not exist
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if [ ! -e /etc/resolv.conf ]; then
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: > /etc/resolv.conf
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fi
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# follow any symlink to find the real file
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REALRESOLVCONF=$(readlink --canonicalize /etc/resolv.conf)
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# merge the new nameservers with the other options from the old configuration
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{
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cat /etc/ppp/resolv.conf
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grep --invert-match '^nameserver[[:space:]]' "$REALRESOLVCONF" || true
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} > "$REALRESOLVCONF.tmp"
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# backup the old configuration and install the new one
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cp -a "$REALRESOLVCONF" "$REALRESOLVCONF.pppd-backup.$PPP_IFACE"
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mv -f "$REALRESOLVCONF.tmp" "$REALRESOLVCONF"
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# restart nscd because resolv.conf has changed
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if [ -e /var/run/nscd.pid ]; then
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/etc/init.d/nscd restart || true
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fi
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exit 0
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