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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	e96fa4427db63b32924387b915a7a5e2cc723d2e
tree	b2c5380d184eb376d49420c95001b451171e4c07	tree \| snapshot
parent	034a0bcab746361acc308bafd97bbcbdb0ce597f	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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