100 lines
2.3 KiB
Bash
Executable File
100 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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#### Core library
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#### webcamd - A webcam Service for multiple Cams and Stream Services.
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####
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#### written by Stephan Wendel aka KwadFan
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#### Copyright 2021
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#### https://github.com/mainsail-crew/crowsnest
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####
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#### This File is distributed under GPLv3
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####
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# shellcheck enable=require-variable-braces
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# Exit upon Errors
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set -e
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## Version of webcamd
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function self_version {
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pushd "${BASE_CN_PATH}" &> /dev/null
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git describe --always --tags
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popd &> /dev/null
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}
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# Init Traps
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trap 'shutdown' 1 2 3 15
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trap 'err_exit $? $LINENO' ERR
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# Behavior of traps
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# log_msg, see libs/logging.sh L#46
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# Print Error Code and Line to Log
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# and kill running jobs
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function err_exit {
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if [ "${1}" != "0" ]; then
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log_msg "ERROR: Error ${1} occured on line ${2}"
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log_msg "ERROR: Stopping $(basename "$0")."
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log_msg "Goodbye..."
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fi
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if [ -n "$(jobs -pr)" ]; then
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jobs -pr | while IFS='' read -r job_id; do
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kill "${job_id}"
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done
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fi
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exit 1
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}
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# Print Goodbye Message
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# and kill running jobs
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function shutdown {
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log_msg "Shutdown or Killed by User!"
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log_msg "Please come again :)"
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if [ -n "$(jobs -pr)" ]; then
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jobs -pr | while IFS='' read -r job_id; do
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kill "${job_id}"
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done
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fi
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log_msg "Goodbye..."
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exit 0
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}
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## Sanity Checks
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# Dependency Check
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# call check_dep <programm>, ex.: check_dep vim
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function check_dep {
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local dep
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dep="$(whereis "${1}" | awk '{print $2}')"
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if [ -z "${dep}" ]; then
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log_msg "Dependency: '${1}' not found. Exiting!"
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exit 1
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else
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log_msg "Dependency: '${1}' found in ${dep}."
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fi
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}
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# Check all needed Dependencies
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# If pass print your set configfile to log.
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# print_cfg, see libs/logging.sh L#75
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# pint_cams, see libs/logging.sh L#84
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function initial_check {
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log_msg "INFO: Checking Dependencys"
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check_dep "crudini"
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check_dep "find"
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check_dep "logger"
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check_dep "ustreamer"
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check_dep "v4l2rtspserver"
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check_dep "xargs"
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# check_dep "rtsp-simple-server" # Stay for later use.
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if [ -z "$(check_cfg "${WEBCAMD_CFG}")" ]; then
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if [ "$(log_level)" != "quiet" ]; then
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print_cfg
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fi
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fi
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# in systemd show always config file
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logger -t webcamd -f "${WEBCAMD_CFG}"
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log_msg "INFO: Detect available Cameras"
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print_cams
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}
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