APPLYDELTARPM(8)

✨ APPLYDELTARPM ✨

okay bestie, gather round, because this is the applydeltarpm page from the System Manager's Manual and it's literally the glow-up wand for rpms 💅

🌸 NAME 🌸

applydeltarpm — reconstruct an rpm from a deltarpm 💖

🦋 SYNOPSIS 🦋

applydeltarpm [-v] [-p] [-r oldrpm] deltarpm newrpm
applydeltarpm -c|-C deltarpm
applydeltarpm [-c|-C] -s sequence
applydeltarpm -i deltarpm

👑 DESCRIPTION 👑

So here's the tea, bestie 🍓: applydeltarpm takes a binary delta and slaps it onto either an old rpm or onto on-disk data, and out pops a shiny brand-new rpm. Iconic behaviour, honestly.

• -r — this is how you hand over the oldrpm. If you don't name an rpm at all, it just uses the on-disk data instead. easy peasy 🌈
• -p — makes applydeltarpm print the percentage of completion, so you can watch the progress bar of your dreams.
• -v — makes it extra chatty about what it's doing. verbose queen 👑

The second and third forms up in the synopsis are your vibe check tools — they tell you whether the reconstruction is even possible. And like… it might fail 😭. It can fail if the on-disk data was changed (and yes, deltarpms are literally created in a way that config file changes do not matter, so don't come for them for that), or if the deltarpm doesn't match the rpm that the delta was generated with.

• -c — selects full (i.e. slow) on-disk checking. thorough. committed. no shortcuts. 🫶
• -C — only checks whether the filesizes have not changed. quick little peek, lowkey efficient ✨

Instead of passing a whole entire full deltarpm, you can just hand over a sequence id with the -s sequence option. That id is carrying all the info needed to do the reconstruction checking — it's giving main character energy, it has everything 🎀

And finally: if you just wanna know stuff about a deltarpm, the -i option prints out information about it. information girlie 💜

🧠 MEMORY CONSIDERATIONS 🧠

applydeltarpm was written to work on systems with limited memory. It uses a paging algorithm to keep the size of in-core data low and to not bring the system into an out-of-memory situation. she's considerate, she's mindful, she respects your RAM 🌸

💀 EXIT STATUS 💀

• applydeltarpm returns 0 if the rpm could be recreated or the checking succeeded. slay ✨
• It returns 1 and prints an error message to stderr if something failed. not slay 😭

🔥 SEE ALSO 🔥

• makedeltarpm(8)
• rpm(8)

iykyk 💅

🫶 AUTHOR 🫶

Michael Schroeder <mls@suse.de> — thank you for your service, king 👑

ok that's the whole page bestie, go forth and reconstruct 🦋

and that's a wrap fr fr 💖 this was the System Manager's Manual version from Feb 2005, so it's vintage and it's still serving. periodt. 🌈⭐🎀