feat: 초기 프로젝트 설정 및 룰.md 파일 추가

api.hyungi.net/node_modules/pidusage/lib/ps.js

@@ -0,0 +1,135 @@
+'use strict'
+
+const os = require('os')
+const bin = require('./bin')
+const history = require('./history')
+
+const PLATFORM = os.platform()
+
+function parseTime (timestr, centisec) {
+  let time = 0
+  const tpart = timestr.split(/-|:|\./)
+  let i = tpart.length - 1
+  if (i >= 0 && centisec && PLATFORM === 'darwin') {
+    time += parseInt(tpart[i--], 10) * 10
+  }
+  if (i >= 0) { // Seconds
+    time += parseInt(tpart[i--], 10) * 1000
+  }
+  if (i >= 0) { // Minutes
+    time += parseInt(tpart[i--], 10) * 60000
+  }
+  if (i >= 0) { // Hours
+    time += parseInt(tpart[i--], 10) * 3600000
+  }
+  if (i >= 0) { // Days
+    time += parseInt(tpart[i--], 10) * 86400000
+  }
+  return time
+}
+
+/**
+  * Get pid informations through ps command.
+  * @param  {Number[]} pids
+  * @param  {Object} options
+  * @param  {Function} done(err, stat)
+  */
+function ps (pids, options, done) {
+  const pArg = pids.join(',')
+  let args = ['-o', 'etime,pid,ppid,pcpu,rss,time', '-p', pArg]
+
+  if (PLATFORM === 'aix' || PLATFORM === 'os400') {
+    args = ['-o', 'etime,pid,ppid,pcpu,rssize,time', '-p', pArg]
+  }
+
+  bin('ps', args, function (err, stdout, code) {
+    if (err) {
+      if (PLATFORM === 'os390' && /no matching processes found/.test(err)) {
+        err = new Error('No matching pid found')
+        err.code = 'ENOENT'
+      }
+
+      return done(err)
+    }
+    if (code === 1) {
+      const error = new Error('No matching pid found')
+      error.code = 'ENOENT'
+      return done(error)
+    }
+    if (code !== 0) {
+      return done(new Error('pidusage ps command exited with code ' + code))
+    }
+    const date = Date.now()
+
+    // Example of stdout on *nix.
+    // ELAPSED: format is [[dd-]hh:]mm:ss
+    // RSS: is counted as blocks of 1024 bytes
+    // TIME: format is [[dd-]hh:]mm:ss
+    // %CPU: goes from 0 to vcore * 100
+    //
+    // Refs: http://www.manpages.info/linux/ps.1.html
+    // NB: The columns are returned in the order given inside the -o option
+    //
+    //    ELAPSED   PID  PPID  %CPU     RSS        TIME
+    // 2-40:50:53   430     1   3.0    5145  1-02:03:04
+    //   40:50:53   432   430   0.0    2364  1-01:02:03
+    //   01:50:50   727     1  10.0  348932       14:27
+    //      00:20  7166     1   0.1    3756        0:00
+
+    // Example of stdout on Darwin
+    // ELAPSED: format is [[dd-]hh:]mm:ss
+    // RSS: is counted as blocks of 1024 bytes
+    // TIME: format is [[dd-]hh:]mm:ss.cc (cc are centiseconds)
+    // %CPU: goes from 0 to vcore * 100
+    //
+    // Refs: https://ss64.com/osx/ps.html
+    // NB: The columns are returned in the order given inside the -o option
+    //
+    //    ELAPSED   PID  PPID  %CPU     RSS           TIME
+    // 2-40:50:53   430     1   3.0    5145  1-02:03:04.07
+    //   40:50:53   432   430   0.0    2364  1-01:02:03.10
+    //   01:50:50   727     1  10.0  348932       14:27.26
+    //      00:20  7166     1   0.1    3756        0:00.02
+
+    stdout = stdout.split(os.EOL)
+
+    const statistics = {}
+    for (let i = 1; i < stdout.length; i++) {
+      const line = stdout[i].trim().split(/\s+/)
+
+      if (!line || line.length !== 6) {
+        continue
+      }
+
+      const pid = parseInt(line[1], 10)
+      let hst = history.get(pid, options.maxage)
+      if (hst === undefined) hst = {}
+
+      const ppid = parseInt(line[2], 10)
+      const memory = parseInt(line[4], 10) * 1024
+      const etime = parseTime(line[0])
+      const ctime = parseTime(line[5], true)
+
+      const total = (ctime - (hst.ctime || 0))
+      // time elapsed between calls in seconds
+      const seconds = Math.abs(hst.elapsed !== undefined ? etime - hst.elapsed : etime)
+      const cpu = seconds > 0 ? (total / seconds) * 100 : 0
+
+      statistics[pid] = {
+        cpu: cpu,
+        memory: memory,
+        ppid: ppid,
+        pid: pid,
+        ctime: ctime,
+        elapsed: etime,
+        timestamp: date
+      }
+
+      history.set(pid, statistics[pid], options.maxage)
+    }
+
+    done(null, statistics)
+  })
+}
+
+module.exports = ps