dynevent_cmd_init(9)

💅 dynevent_cmd_init(9) — like, the Kernel API Manual entry, but make it make sense

okay so bestie, welcome to the Kernel API Manual ✨ this is the page for dynevent_cmd_init(9) and honestly it's the little setup step everyone forgets and then everything breaks, so let's get into it 🫶

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🌸 NAME 🌸

dynevent_cmd_init — literally the function that initializes a dynevent_cmd object, no cap

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✨ SYNOPSIS ✨

void dynevent_cmd_init (struct dynevent_cmd *cmd , char *buf , int
maxlen , enum dynevent_type type , dynevent_create_fn_t run_command );

like, that's the whole vibe. five params, one little void, she's iconic 👑

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🎀 ARGUMENTS 🎀

• cmd — a pointer to the dynevent_cmd struct that's representing the cmd. yes she's the main character 💅
• buf — a pointer to the buffer you're gonna generate the command into 🌸
• maxlen — the length of that buffer, aka how much room the command gets to be generated into. pls don't lie about this one 😭
• type — the type of the cmd, and it gets checked against further operations later, so it's lowkey a whole bouncer at the club 🚪
• run_command — the type-specific function that will actually run the command, fr fr

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🦋 DESCRIPTION 🦋

so. dynevent_cmd_init initializes a dynevent_cmd. and a dynevent_cmd is the thing you use to build up and run dynamic event creation commands — think commands for creating synthetic events and kprobe events, that whole situation ✨

here's the rule, and it's giving non-negotiable: before you call any of the functions used to build the command, a dynevent_cmd object should be instantiated and initialized using this function. that's the whole assignment. do it first 🙈

what does the initialization actually do? it sets things up by:

• saving a pointer to the user-supplied buffer, and its length, via the buf and maxlen params 💖
• saving the cmd-specific type and run_command params, which are used to check subsequent dynevent_cmd operations and to actually run the command when it's complete 🔥

so yeah, she's basically the group chat admin adding everyone before the convo even starts. nothing happens without her 🎀

ngl, if you skip this and jump straight to building the command, you're gonna have a bad time. initialize first, always. periodt. 💀

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🌈 SEE ALSO 🌈

• Kernel file ./kernel/trace/trace_dynevent.c
• dynevent_arg_add(9)
• dynevent_arg_pair_add(9)
• dynevent_str_add(9)
• dynevent_arg_init(9)
• dynevent_arg_pair_init(9)
• dynevent_create(9)

like, go read all of them, they're the rest of the saga 🧚

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and that's the page bestie 💜 this lil' beaut lives down in ./kernel/trace and she's dated October 2026 — go forth and initialize responsibly, ok? mwah 🍓👑