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Users and permissions: accounts, login, enforced file permissions, setuid, su, passwd, doas

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The kernel now checks owner/group/other on open, create, unlink, rename, exec
and path search; honours set-user-id and set-group-id; restricts kill, mount,
reboot and mknod; keeps supplementary groups; and implements chown. devtmpfs
nodes carry owners and modes that chmod/chown keep. Terminals run login, the
image has root and schos, X starts as the ordinary user.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EVRhxi9zpdW2uDUN4FVcao
This commit is contained in:
Nexoniarz 2026-10-26 13:16:07 +01:00
commit 020aa6113c
34 changed files with 1342 additions and 120 deletions
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docs/architecture/README.md
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@ -94,6 +94,7 @@ Read in this order if you are new:
| [fat.md](fat.md) | FAT12/16/32 with long names: USB sticks, SD cards, the ESP. |
| [devices.md](devices.md) | Buses, classes, binding, and the vtables consumers talk to. |
| [usb.md](usb.md) | xHCI, the USB core, and the three class drivers. |
| [users.md](users.md) | Accounts, login, and the permissions the kernel enforces. |
| [udev.md](udev.md) | eudev on SchOS: the device table, the `/sys` tree, uevents, datagram sockets. |
| [graphics.md](graphics.md) | Framebuffer, `/dev/fb0`, text rendering, the console, PSOGM and GMMOS. |
| [desktop.md](desktop.md) | Xorg on the framebuffer, Window Maker, and what they stand on. |