small-packages/luci-app-log/root/usr/share/rpcd/ucode/luci.log-viewer

'use strict';

import { popen, stat } from 'fs';

const dmesgCmd   = '/bin/dmesg';
const logreadCmd = (
	(stat('/sbin/logread')?.perm?.user_exec) ? '/sbin/logread' :
		((stat('/usr/sbin/logread')?.perm?.user_exec) ? '/usr/sbin/logread' : null));

if(!logreadCmd) {
	die('Error! Logread not found!');
}

function getCmdOutput(cmd, number) {
	let ret = '';
	const fd = popen(cmd, 'r');
	if(fd) {
		let c = fd.read('all');
		fd.close();
		if(c) {
			c = trim(c);
			ret = number ? int(c) : c;
		}
	}
	return ret;
}

const methods = {
	getSyslogSize: {
		call: function() {
			return { 'bytes': getCmdOutput(logreadCmd + ' | wc -c', true) };
		},
	},

	getSyslogHash: {
		call: function() {
			return { 'hash': getCmdOutput(logreadCmd + ' -t -l 1') };
		},
	},

	getDmesgSize: {
		call: function() {
			return { 'bytes': getCmdOutput(dmesgCmd + ' | wc -c', true) };
		},
	},

	getDmesgHash: {
		call: function() {
			return { 'hash': getCmdOutput(dmesgCmd + ' | tail -n 1') };
		},
	},

	getLogfileSize: {
		args: { fpath: 'fpath' },
		call: function(request) {
			let ret    = '';
			const path = request.args?.fpath;
			if(path) {
				ret = stat(path)?.size;
			}
			return { 'bytes': ret ?? '' };
		},
	},
};

return { 'luci.log-viewer': methods };