lib: pass env variables to child process on z/OS

PR-URL: #42255
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: alexcfyung

lib/child_process.js

@@ -93,6 +93,8 @@ const {
 
 constMAX_BUFFER=1024*1024;
 
+constisZOS=process.platform==='os390';
+
 /**
  * Spawns a new Node.js process + fork.
  * @param {string|URL} modulePath
@@ -524,6 +526,14 @@ ObjectDefineProperty(execFile, promisify.custom, {
 value: customPromiseExecFunction(execFile)
 });
 
+functioncopyProcessEnvToEnv(env,name,optionEnv){
+if(process.env[name]&&
+(!optionEnv||
+!ObjectPrototypeHasOwnProperty(optionEnv,name))){
+env[name]=process.env[name];
+}
+}
+
 functionnormalizeSpawnArguments(file,args,options){
 validateString(file,'file');
 
@@ -630,9 +640,19 @@ function normalizeSpawnArguments(file, args, options) {
 
 // process.env.NODE_V8_COVERAGE always propagates, making it possible to
 // collect coverage for programs that spawn with white-listed environment.
-if(process.env.NODE_V8_COVERAGE&&
-!ObjectPrototypeHasOwnProperty(options.env||{},'NODE_V8_COVERAGE')){
-env.NODE_V8_COVERAGE=process.env.NODE_V8_COVERAGE;
+copyProcessEnvToEnv(env,'NODE_V8_COVERAGE',options.env);
+
+if(isZOS){
+// The following environment variables must always propagate if set.
+copyProcessEnvToEnv(env,'_BPXK_AUTOCVT',options.env);
+copyProcessEnvToEnv(env,'_CEE_RUNOPTS',options.env);
+copyProcessEnvToEnv(env,'_TAG_REDIR_ERR',options.env);
+copyProcessEnvToEnv(env,'_TAG_REDIR_IN',options.env);
+copyProcessEnvToEnv(env,'_TAG_REDIR_OUT',options.env);
+copyProcessEnvToEnv(env,'STEPLIB',options.env);
+copyProcessEnvToEnv(env,'LIBPATH',options.env);
+copyProcessEnvToEnv(env,'_EDC_SIG_DFLT',options.env);
+copyProcessEnvToEnv(env,'_EDC_SUSV3',options.env);
 }
 
 letenvKeys=[];