[libc-commits] [libc] [libc][stdlib] Implement setenv() with environment management infrastructure (PR #163018)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- libc/src/stdlib/environ_internal.cpp libc/src/stdlib/environ_internal.h libc/src/stdlib/linux/setenv.cpp libc/src/stdlib/setenv.h libc/test/integration/src/stdlib/setenv_test.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/libc/src/stdlib/environ_internal.cpp b/libc/src/stdlib/environ_internal.cpp
index 08319e2a7..fe1ca15f7 100644
--- a/libc/src/stdlib/environ_internal.cpp
+++ b/libc/src/stdlib/environ_internal.cpp
@@ -120,9 +120,8 @@ bool EnvironmentManager::ensure_capacity(size_t needed) {
   if (!new_storage)
     return false;
 
-  EnvStringOwnership *new_ownership =
-      reinterpret_cast<EnvStringOwnership *>(realloc(
-          ownership, sizeof(EnvStringOwnership) * (new_capacity + 1)));
+  EnvStringOwnership *new_ownership = reinterpret_cast<EnvStringOwnership *>(
+      realloc(ownership, sizeof(EnvStringOwnership) * (new_capacity + 1)));
   if (!new_ownership) {
     // If ownership realloc fails, we still have the old storage in new_storage
     // which was successfully reallocated. We need to restore or handle this.

``````````

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https://github.com/llvm/llvm-project/pull/163018