LIBTRACEEVENT(3)

💖 LIBTRACEEVENT(3) 💖

okay bestie, welcome to the libtraceevent Manual, the one and only, and today we're talking about one (1) very specific vibe: how big is a long on the machine where your trace got made?? because it's NOT always the same everywhere and that's the whole tea ☕

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✨ NAME ✨

tep_get_long_size, tep_set_long_size — grab / set the size of a long integer, in bytes, on the machine where the trace is generated 🦋

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✨ SYNOPSIS ✨

#include <event-parse.h>

int tep_get_long_size(strucqt tep_handle *tep);
void tep_set_long_size(struct tep_handle *tep, int long_size);

not me pointing at that strucqt in the very first prototype 😭 that is literally how it's written in the source docs, so we're keeping it character for character, no cap, we don't "fix" quotes around here 💅

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✨ DESCRIPTION ✨

so. the tep_get_long_size() function returns the size of a long integer on the machine where the trace is generated 🌸 like, the machine that produced the trace, not necessarily the one you're reading it on. the tep argument is the trace event parser context 👑

and tep_set_long_size() does the flip side: it sets the size of a long integer on the machine where the trace is generated 🎀 the tep argument is, again, the trace event parser context, and long_size is the size of a long integer, in bytes.

so one of them asks, one of them tells. bestie energy fr fr 🫶

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✨ RETURN VALUE ✨

the tep_get_long_size() function returns the size of a long integer on the machine, where the trace is generated, in bytes 👑 that's the whole thing. that's the number you came for. slay.

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✨ EXAMPLE ✨

here's how the girlies actually use it, verbatim:

#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
tep_set_long_size(tep, 4);
...
int long_size = tep_get_long_size(tep);
...

see how we set it to 4 and then just... ask for it back?? iconic behavior, we love a round trip 💖

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✨ FILES ✨

• event-parse.h — the header file you include so you can actually touch the library APIs 🌈
• -ltraceevent — the linker switch you add when building a program that uses the library 🔥

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✨ SEE ALSO ✨

• libtraceevent(3)
• trace-cmd(1)

go read those too, they're the rest of the squad 🧚

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✨ AUTHOR ✨

• Steven Rostedt <rostedt@goodmis.org[1]> — author of libtraceevent 👑
• Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]> — author of this man page 💜

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✨ REPORTING BUGS ✨

found a bug?? report it to <linux-trace-devel@vger.kernel.org[3]> — they wanna hear it, fr fr 🙈

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✨ LICENSE ✨

libtraceevent is Free Software licensed under the GNU LGPL 2.1 💅

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✨ RESOURCES ✨

https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/

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✨ NOTES ✨

1. rostedt@goodmis.org mailto:rostedt@goodmis.org
2. tz.stoyanov@gmail.com mailto:tz.stoyanov@gmail.com
3. linux-trace-devel@vger.kernel.org mailto:linux-trace-devel@vger.kernel.org

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and that's the whole page bestie!! this one landed in libtraceevent version 1.9.0, dated 06/15/2026 ⭐ take that long size knowledge and go be the main character of your own trace parser 🎀🦋✨