process: move POSIX credential accessors into node_credentials.cc

Expose the POSIX credential accessors through
`internalBinding('credentials')` instead of setting them on the
process or bootstrapper object from C++ directly. Also moves
`SafeGetEnv` from `internalBinding('util')` to
`internalBinding('credentials')` since it's closely related to
the credentials.

In the JS land, instead of wrapping the bindings then writing
to the process object directly in main_thread_only.js, return
the wrapped functions back to bootstrap/node.js where they get
written to the process object conditionally for clarity.

Refs: https://github.com/nodejs/node/issues/24961

PR-URL: https://github.com/nodejs/node/pull/25066
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/node_main.cc b/src/node_main.cc
index bea1af7bdd..7107aea8c1 100644
--- a/src/node_main.cc
+++ b/src/node_main.cc
@@ -88,7 +88,9 @@ extern char** environ;
 #endif
 
 namespace node {
-  extern bool linux_at_secure;
+namespace per_process {
+extern bool linux_at_secure;
+}  // namespace per_process
 }  // namespace node
 
 int main(int argc, char* argv[]) {
@@ -112,7 +114,7 @@ int main(int argc, char* argv[]) {
   Elf_auxv_t* auxv = reinterpret_cast<Elf_auxv_t*>(envp);
   for (; auxv->a_type != AT_NULL; auxv++) {
     if (auxv->a_type == AT_SECURE) {
-      node::linux_at_secure = auxv->a_un.a_val;
+      node::per_process::linux_at_secure = auxv->a_un.a_val;
       break;
     }
   }