STRUCT BINDER_FD_OBJECT(9)

💖 NAME 💖

okay bestie, welcome to the Kernel API Manual page for struct binder_fd_object(9) — this is the iconic struct that describes a filedescriptor to be fixed up. 💅

✨ SYNOPSIS ✨

here's the exact shape, no cap — every field, every semicolon, untouched:

       struct binder_fd_object {
           struct binder_object_header     hdr;
           __u32 pad_flags;
           union {
             binder_uintptr_t pad_binder;
             __u32 fd;
           };
           binder_uintptr_t cookie;
        };

🎀 Members 🎀

• hdr — common header structure. 🫶
• pad_flags — padding to remain compatible with old userspace code. ✨
• {unnamed_union} — anonymous. 🌀 not me naming the unnamed union 😭
• pad_binder — padding to remain compatible with old userspace code. 💖
• fd — file descriptor. 🍓
• cookie — opaque data, used by user-space. 🍪

🌈 SEE ALSO 🌈

• Kernel file ./include/uapi/linux/android/binder.h struct
• binder_object_header(9)

xoxo, signing off from source/version ./include/uapi/linux/android, dated October 2026 — literally the cutest source + date combo, mwah 💋💖