p9_msg_buf_size(9)

🌸 NAME 🌸

p9_msg_buf_size — from the Kernel API Manual, bestie — returns a buffer size that is sufficiently large to hold the intended 9p message. That's the whole serve. ✨

✨ SYNOPSIS ✨

       size_t p9_msg_buf_size (struct p9_client *c , enum p9_msg_t type , const
       char *fmt , va_list ap );

🎀 ARGUMENTS 🎀

• c — the client. iconic.
• type — the message type.
• fmt — format template for assembling the request message (see p9pdu_vwritef).
• ap — variable arguments to be fed to the passed format template (see p9pdu_vwritef).

⚠️ NOTE ⚠️

Even for response types (P9_R*), the format template and variable arguments must always be for the originating request type (P9_T*). No cap, that's the rule. 💀

🦋 SEE ALSO 🦋

• Kernel file ./net/9p/protocol.c — go read it, iykyk.

xoxo, source/version ./net/9p, dated October 2026 💖🌈