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macOS watchdog: detect deck via ioreg sessionID

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system_profiler SPUSBDataType was silently omitting the deck on some Macs
(watchdog exited early, never restarted anything) and, when it did report,
the trailing bus number in "Location ID: X / N" flapped without an actual
replug — causing spurious restarts. ioreg sees the device reliably and
sessionID changes only on real re-enumeration.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
lwoodard
2026-06-09 11:25:54 -06:00
parent a51fd2beff
commit a542ad60cd
1 changed files with 17 additions and 14 deletions
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31
systemd/streamdeck-go-watchdog.sh
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@@ -51,20 +51,23 @@ current_addr() {
' '
;; ;;
Darwin) Darwin)
# system_profiler entry per device: # ioreg is the reliable source on macOS — system_profiler SPUSBDataType
# Stream Deck XL: # silently omits the deck on some machines, and its "Location ID: X / N"
# Product ID: 0x00ba # trailing bus number flaps spuriously without an actual replug.
# Vendor ID: 0x0fd9 (Elgato ...) #
# ... # sessionID is unique per USB enumeration session: stable while the
# Location ID: 0x14140000 / 5 # device stays plugged in, changes on every replug. Exactly what we want.
# The trailing "/ N" is the bus address — it changes on replug. #
system_profiler SPUSBDataType 2>/dev/null | awk -v pids="$PIDS_RE" ' # Elgato vendor in decimal: 4057 (0x0fd9).
/^[[:space:]]*Product ID:/ { pid = $3 } # Stream Deck product IDs in decimal: 186 (0x00ba), 108 (0x006c), 109 (0x006d).
/^[[:space:]]*Vendor ID:/ { vid = $3 } ioreg -p IOUSB -l -w 0 2>/dev/null | awk '
/^[[:space:]]*Location ID:/ { /<class IOUSBHostDevice/ { vid=""; pid=""; sid="" }
sub(/^[[:space:]]*Location ID:[[:space:]]*/, "") /"idVendor"/ { vid=$NF }
if (vid == "0x0fd9" && pid ~ ("^0x(" pids ")$")) { /"idProduct"/ { pid=$NF }
print /"sessionID"/ { sid=$NF }
/}/ {
if (vid == "4057" && (pid == "186" || pid == "108" || pid == "109") && sid != "") {
print sid
exit exit
} }
} }