modules/luci-mod-status/htdocs/luci-static/resources/view/status/syslog.js

   1 'use strict';
   2 'require view';
   3 'require fs';
   4 'require poll';
   5 'require ui';
   6
   7 return view.extend({
   8         retrieveLog: async function() {
   9                 return Promise.all([
  10                         L.resolveDefault(fs.stat('/sbin/logread'), null),
  11                         L.resolveDefault(fs.stat('/usr/sbin/logread'), null)
  12                 ]).then(function(stat) {
  13                         var logger = stat[0] ? stat[0].path : stat[1] ? stat[1].path : null;
  14
  15                         return fs.exec_direct(logger, [ '-e', '^' ]).then(logdata => {
  16                                 const loglines = logdata.trim().split(/\n/);
  17                                 return { value: loglines.join('\n'), rows: loglines.length + 1 };
  18                         }).catch(function(err) {
  19                                 ui.addNotification(null, E('p', {}, _('Unable to load log data: ' + err.message)));
  20                                 return '';
  21                         });
  22                 });
  23         },
  24
  25         pollLog: async function() {
  26                 const element = document.getElementById('syslog');
  27                 if (element) {
  28                         const log = await this.retrieveLog();
  29                         element.value = log.value;
  30                         element.rows = log.rows;
  31                 }
  32         },
  33
  34         load: async function() {
  35                 poll.add(this.pollLog.bind(this));
  36                 return await this.retrieveLog();
  37         },
  38
  39         render: function(loglines) {
  40                 var scrollDownButton = E('button', {
  41                                 'id': 'scrollDownButton',
  42                                 'class': 'cbi-button cbi-button-neutral'
  43                         }, _('Scroll to tail', 'scroll to bottom (the tail) of the log file')
  44                 );
  45                 scrollDownButton.addEventListener('click', function() {
  46                         scrollUpButton.focus();
  47                 });
  48
  49                 var scrollUpButton = E('button', {
  50                                 'id' : 'scrollUpButton',
  51                                 'class': 'cbi-button cbi-button-neutral'
  52                         }, _('Scroll to head', 'scroll to top (the head) of the log file')
  53                 );
  54                 scrollUpButton.addEventListener('click', function() {
  55                         scrollDownButton.focus();
  56                 });
  57
  58                 return E([], [
  59                         E('h2', {}, [ _('System Log') ]),
  60                         E('div', { 'id': 'content_syslog' }, [
  61                                 E('div', {'style': 'padding-bottom: 20px'}, [scrollDownButton]),
  62                                 E('textarea', {
  63                                         'id': 'syslog',
  64                                         'style': 'font-size:12px',
  65                                         'readonly': 'readonly',
  66                                         'wrap': 'off',
  67                                         'rows': loglines.rows,
  68                                 }, [ loglines.value ]),
  69                                 E('div', {'style': 'padding-bottom: 20px'}, [scrollUpButton])
  70                         ])
  71                 ]);
  72         },
  73
  74         handleSaveApply: null,
  75         handleSave: null,
  76         handleReset: null
  77 });