devshell/syslog

#!/bin/bash
# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

### Listen for logs

## usage: fx syslog [--raw] [flags]
##
## Creates an SSH connection with a device and starts listening for logs.
## Pass -h to get help with log-listener flags.
## pass --raw as the first argument to get the raw, unsymbolized logs.

set -o pipefail

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"/lib/vars.sh

function listen {
  trap "exit 0" INT
  while true; do
    addr="$(get-fuchsia-device-addr --nowait --timeout=1000)"
    if [[ -n "${addr}" ]]; then
      echo "Connecting to device (${addr})..."
      (fx-command-exec ssh "${addr}" log_listener "$@" || true)
      if [[ $? -eq 0 ]]; then
        break
      fi
    fi
  done
}

echo "Looking for device"
if [[ $# > 0 && "$1" = "--raw" ]]; then
  shift
  listen "$@"
else
  listen "$@" | fx-symbolize
fi