TDB_EXISTS(3)

💖 TDB_EXISTS — bestie's guide to the tdb_exists(3) manual page 💖

okay so. you're here, you're in the Linux Programmer's Manual, and you wanna know if a record is literally in your tdb database or not. this page has u covered, no cap. ✨

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🌸 NAME 🌸

tdb_exists — check for the existence of a record in a tdb database 🦋

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✨ SYNOPSIS ✨

#include <tdb.h>

int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);

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💅 DESCRIPTION 💅

so the whole vibe here is: you're testing to see if a key exists. that's it, that's the job. 🎀

• tdb — this is a pointer that got handed to you by tdb_open. like, it's the returned one, don't just make one up bestie 😭
• key — this is a lump of data, and it's used as the index into the database. the way it just *indexes*… iconic.

and the TDB_DATA structure is defined as:

typedef struct {
     char *dptr;
     size_t dsize;
} TDB_DATA;

that's it. that's the struct. dptr and dsize. periodt. 💜

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🔥 RETURN VALUE 🔥

the vibes are very binary here:

• if the key is found → 1 is returned 🫶
• otherwise → 0 is returned

no in-between, no maybe, no "it's complicated". just 1 or 0. slay.

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👑 AUTHORS 👑

the legends behind this whole thing:

• Software: Andrew Tridgell <tridge@linuxcare.com> and Luke Kenneth Casson Leighton 🌟
• Man page: Ben Woodard <ben@valinux.com> 🧚

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🌈 SEE ALSO 🌈

go check out these besties too, iykyk:

• gdbm(3)
• tdb(3)

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lowkey a lil reminder: tdb_exists is a test, not a read. it's giving "are u there" energy, not "tell me everything about urself". just sayin 💖

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and that's the page, bestie!! this one's from the Samba crew, dated Aug 17, 2000 — a whole classic, a vintage icon, and honestly it still ate 💅✨ mwah, go check ur keys 🦋