Скачать или смотреть Start create_file Function | 32 Bit OS Dev (in C)

From the only person to not cover the video title until 1 hour into the video, this one has a couple inode helper functions and starting a create file function for open(), which will take a while.

Errata:
In inode_from_path(), reading all the blocks from an extent should be similar to j = extent.first_block while j is less than extent.first_block + extent.length_blocks.
As it is now, it only checks if j less than length_blocks, and the first block might be a value larger than length_blocks e.g. if first block = 32 and length = 2 then
the loop would never execute to begin with.
In parent_inode_from_path(), if the last file in the path is a directory, then it returns that file, not its parent directory. That's not good.

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   • Amateur Makes an OS  

Git Repos:
Sourcehut: https://git.sr.ht/~queso_fuego/quesos
Github mirror: https://github.com/queso-fuego/amateuros

Repo state before open() syscall (this will be updated when open() and creating new files is mostly done):
git clone -n https://github.com/queso-fuego/amateuros
cd amateuros
git checkout 4255fe96f1efb69498eec2a55417dd3eca3eb2de

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Contact:
email: [email protected]
twitter: @Queso_Fuego
twitch:   / queso_fuego  

Next video:
Mostly getting inode and data bits for a new file in fs_create_file()

Let me know if there's anything specific you'd like to see!

Outline:
0:00 changes since last video
4:32 sectors_per_block constant
7:24 inode_for_name_in_directory()
30:37 parent_inode_from_path()
35:51 fail at debugging broken booting
55:16 fix for broken boot (shadowed variable...)
1:00:35 start fs_create_file()
1:26:47 strchr() & strrchr()
1:31:22 fs_create_file()
1:43:35 test strchr & strrchr
1:49:26 wrap up & outro

Questions about setup/software/etc.?
Check the FAQ: https://queso_fuego.srht.site/about.html

Music credits:
Morning Routine by Ghostrifter Official |   / ghostrifter-official  
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Creative Commons CC BY-SA 3.0
https://creativecommons.org/licenses/...

#osdev #filesystem #inodes