nodejs
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‎lib/internal/bootstrap/node.js‎
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‎lib/internal/bootstrap/node.js‎
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‎lib/internal/process/methods.js‎
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‎lib/internal/process/methods.js‎
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‎node.gyp‎
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‎test/parallel/test-umask.js‎ ‎test/parallel/test-process-umask.js‎test/parallel/test-umask.js renamed to test/parallel/test-process-umask.js
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‎test/parallel/test-umask.js‎ ‎test/parallel/test-process-umask.js‎test/parallel/test-umask.js renamed to test/parallel/test-process-umask.js
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@@ -40,6 +40,7 @@
     NativeModule.require('internal/process/warning').setup();
     NativeModule.require('internal/process/next_tick').setup();
     NativeModule.require('internal/process/stdio').setup();
+    NativeModule.require('internal/process/methods').setup();
 
     const perf = process.binding('performance');
     const {
 
@@ -0,0 +1,65 @@
+'use strict';
+
+function setupProcessMethods() {
+  // Non-POSIX platforms like Windows don't have certain methods.
+  if (process.setgid !== undefined) {
+    setupPosixMethods();
+  }
+
+  const { chdir: _chdir, umask: _umask } = process;
+
+  process.chdir = chdir;
+  process.umask = umask;
+
+  function chdir(...args) {
+    return _chdir(...args);
+  }
+
+  function umask(...args) {
+    return _umask(...args);
+  }
+}
+
+function setupPosixMethods() {
+  const {
+    initgroups: _initgroups,
+    setegid: _setegid,
+    seteuid: _seteuid,
+    setgid: _setgid,
+    setuid: _setuid,
+    setgroups: _setgroups
+  } = process;
+
+  process.initgroups = initgroups;
+  process.setegid = setegid;
+  process.seteuid = seteuid;
+  process.setgid = setgid;
+  process.setuid = setuid;
+  process.setgroups = setgroups;
+
+  function initgroups(...args) {
+    return _initgroups(...args);
+  }
+
+  function setegid(...args) {
+    return _setegid(...args);
+  }
+
+  function seteuid(...args) {
+    return _seteuid(...args);
+  }
+
+  function setgid(...args) {
+    return _setgid(...args);
+  }
+
+  function setuid(...args) {
+    return _setuid(...args);
+  }
+
+  function setgroups(...args) {
+    return _setgroups(...args);
+  }
+}
+
+exports.setup = setupProcessMethods;
@@ -120,6 +120,7 @@
       'lib/internal/net.js',
       'lib/internal/os.js',
       'lib/internal/process/esm_loader.js',
+      'lib/internal/process/methods.js',
       'lib/internal/process/next_tick.js',
       'lib/internal/process/promises.js',
       'lib/internal/process/stdio.js',