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author	Tulio A M Mendes <[email protected]>
	Sun, 8 Feb 2026 02:46:46 +0000 (23:46 -0300)
committer	Tulio A M Mendes <[email protected]>
	Sun, 8 Feb 2026 02:46:46 +0000 (23:46 -0300)
commit	7b3453170010007ae76f833f2e93d2d9e3eef8c9
tree	cc109365407fd31985aa4434ef51ac9de1156907	tree \| snapshot
parent	5ee615e7a651313933d344dc67f0a7822ccfe0ea	commit \| diff

posix: standardize -errno returns

Adopt negative errno return convention across waitpid/open/fd_close and TTY read/write, add missing errno constants, and return ENOSYS for unknown syscalls.

include/errno.h		diff \| blob \| blame \| history
src/kernel/scheduler.c		diff \| blob \| blame \| history
src/kernel/syscall.c		diff \| blob \| blame \| history
src/kernel/tty.c		diff \| blob \| blame \| history

AdrOS - A Unix-like Operating System for hobby/academic study.

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