llvm-project

6f653e2e - [libc] Add getgrent, setgrent, and endgrent entrypoints (#224372)

[libc] Add getgrent, setgrent, and endgrent entrypoints (#224372) Implement the POSIX group database iteration entrypoints getgrent, setgrent, and endgrent on top of grp_utils and FlatFileDatabase. Non-reentrant calls read into a process-global DynamicBuffer that grows to the high-water mark of the largest group record seen. endgrent closes the file stream without freeing the buffer so pointers returned prior to endgrent remain valid until the next non-reentrant call. * Add getgrent, setgrent, and endgrent entrypoints * Define getgrent, setgrent, and endgrent in include/grp.yaml * Expose entrypoints across Linux target architectures * Add hermetic integration tests in test/src/grp/getgrent_test.cpp Assisted-by: Automated tooling, human reviewed.