HESIOD(3)

💖 HESIOD(3) 💖

okay bestie, welcome to the Library Functions Manual era, we're doing Hesiod today and honestly? it's giving vintage but make it useful. ✨

🌸 NAME 🌸

hesiod_getmailhost, hesiod_free_postoffice — Hesiod functions for retrieving user to postoffice mappings 🫶

✨ SYNOPSIS ✨

#include <hesiod.h>

struct hesiod_postoffice *hesiod_getmailhost(void *context,
     const char *user)
void hesiod_free_postoffice(void *context,
     struct hesiod_postoffice *po)

cc file.c -lhesiod

🦋 DESCRIPTION 🦋

so this whole little family of functions lets you pull user → postoffice mappings using Hesiod. iconic behavior, no cap. 💅

but before you can do literally any lookups, you need an initialized Hesiod context — go read hesiod(3) for the deets on that, i'm not gatekeeping but that's a different page, bestie. 🌈

the info comes back to you inside a hesiod_postoffice structure, and it has these fields:

• hesiod_po_type — the type of postoffice box, typically ``POP''. it's giving very specific. 🎀
• hesiod_po_host — the hostname where the postoffice box resides. that's its home, its main character address. 👑
• hesiod_po_name — the account name on the given postoffice server.

⚠️ and this part is on you, fr fr: it is the caller's responsibility to call hesiod_free_postoffice with the returned postoffice entry to free the resources used by the postoffice entry. don't just walk away from it, that's rude and also a memory leak. 😭

so how does the actual lookup work? Hesiod queries for postoffice information are made using the ``pobox'' Hesiod type, using the username as the Hesiod name. and the corresponding entries should be space-separated lists of strings giving:

1. the type of postoffice box
2. the hostname
3. the account name

three little strings, one slay little list. ⭐

🎀 RETURN VALUES 🎀

on failure, hesiod_getservbyname returns NULL and sets the global variable errno to indicate the error. (yes, that's the name the page says — i'm not editing the lore, i'm just reporting it. 🙈)

💀 ERRORS 💀

hesiod_getmailhost may fail for any of the reasons the routine hesiod_resolve may fail. that's it, that's the whole tea — go check hesiod_resolve if you want the receipts. 🔥

🧚 SEE ALSO 🧚

• hesiod(3)

and that's the page, bestie!! this cutie dropped on 30 November 1996 as part of the HESIOD(3) library functions manual energy — vintage queen behavior, we respect her. 💜✨🎀