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https://github.com/clash-verge-rev/clash-verge-rev.git
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TungliesandCopilot
63a16a8272
Reinstall an existing Service while keeping its enabled, runtime-masked and active state. Detect, from the journal, a running Service removed by a previous deb prerm and reinstall it with its recorded group. Package script output never reaches the app, so leave a /run marker that makes the app offer a reinstall once when the Service is not ready. Hold the core lifecycle until the package manager exits, even after the startup install times out, so no core start overlaps the Service reinstall; restart the app once a late install succeeds. Refs #8515 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
35 lines
1.7 KiB
Bash
35 lines
1.7 KiB
Bash
#!/bin/bash
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# Previous packages' prerm uninstalls the Service before this script runs, deleting the unit that names
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# its group. The journal still shows whether this dpkg run stopped a running Service and which group it ran with;
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# the postinst reinstalls from that evidence, and without it nothing is installed.
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SERVICE_UNIT="clash-verge-service.service"
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UPGRADE_MARKER="/run/clash-verge-service-upgrade"
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# systemd's "unit stopped" catalog entry.
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UNIT_STOPPED_MESSAGE_ID="9d1aaa27d60140bd96365438aad20286"
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dpkg_start_epoch() {
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local stat start btime ticks
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read -r stat <"/proc/$PPID/stat" || return 1
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start="$(printf '%s\n' "${stat##*) }" | cut -d' ' -f20)"
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btime="$(sed -n 's/^btime //p' /proc/stat)"
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ticks="$(getconf CLK_TCK)"
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[ -n "$start" ] && [ -n "$btime" ] && [ -n "$ticks" ] || return 1
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echo $((btime + start / ticks))
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}
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if [ "$1" = "upgrade" ] && [ ! -e "/etc/systemd/system/$SERVICE_UNIT" ] && [ -d /run/systemd/system ] &&
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[ "$(cat "/proc/$PPID/comm" 2>/dev/null)" = "dpkg" ] && command -v journalctl >/dev/null; then
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since="$(dpkg_start_epoch)"
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if [ -n "$since" ] &&
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[ -n "$(journalctl -q --no-pager --since "@$since" _PID=1 UNIT="$SERVICE_UNIT" MESSAGE_ID="$UNIT_STOPPED_MESSAGE_ID" -o cat 2>/dev/null)" ]; then
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# The truncated process name excludes cores the Service spawned in its cgroup.
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gid="$(journalctl -q --no-pager -b _SYSTEMD_UNIT="$SERVICE_UNIT" _COMM=clash-verge-ser -n 1 -o export 2>/dev/null |
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sed -n 's/^_GID=//p')"
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if [ -z "$gid" ] || [ "$gid" = "0" ] || ! getent group "$gid" >/dev/null; then
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gid=""
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fi
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(umask 022 && printf 'gid=%s\nid=%s\n' "$gid" "$(date +%s%N)" >"$UPGRADE_MARKER")
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fi
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fi
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exit 0
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