gbos.git/c/wc.c, branch mastergbos - a tiny Unix-flavored OS for the Game Boy Color (kernel, shell, coreutils in C, RAM filesystem)https://git.sl0p.foo/gbos.git/atom/c/wc.c?h=master2026-07-17T22:38:38Zrefactor: c/ -> usr/, compiled program blobs out of the source tree2026-07-17T22:38:38Zuseruser@clank2026-07-17T22:38:38Zurn:sha1:ba2d7ae1d7b319645b10aaa31a7f664f9f80c25c
Userland sources live in usr/ (fits the Unix theme better than 'c').
SDCC output .bin blobs land in build/usr/ with the other build artifacts
instead of littering the source dir; programs.asm INCBINs them from there.
Byte-identical ROM.
fs: reject open()/read() on a directory (EISDIR)2026-07-16T11:07:28Zuseruser@clank2026-07-16T11:07:28Zurn:sha1:fc6f690727aac2b5c9bd368f9b13188fb0ba36a7
open() now checks the target's inode type: opening a directory as a file
returns $FE (EISDIR) instead of a valid fd, so 'cat docs' no longer streams the
raw directory block as bytes. cat reports 'is a directory'; wc/head/save treat
any invalid fd (>3) as an open failure. (ls is unaffected - it uses the
structural opendir/list path, not open/getb.)
filesystem: a RAM FS (WRAMX) + ls/cat/save/rm; wc/head read files2026-07-16T05:53:19Zuseruser@clank2026-07-16T05:53:19Zurn:sha1:7b5c532625a864a3fbaf76f44df6aa99b0d6861e
- fs.asm: 8-slot RAM filesystem in WRAMX ($D000-$DFFF), name[8]+len[2]+data[502];
syscalls open/close/getb/putb/list/remove, seeded with a 'readme' at boot.
- libc: open/close/fgetc/fputc/flist/fremove wrappers + O_READ/O_WRITE/NOFD.
- tools: ls, save (stdin->file, one line), rm; cat/wc/head now take a file arg.
- fix: syscall dispatch clobbers A, so putb takes its byte in E (was reading the
handler's low address byte, 0xDC); ls NUL-terminates 8-char names.
- verified: save/cat/ls/rm cycle; wc readme -> '2 7 38'; head -n 1 readme.
- README: document the filesystem + the A-clobber ABI note.
libc: option parsing (hasflag/optval); wc -l/-w/-c, head -n N2026-07-16T05:41:04Zuseruser@clank2026-07-16T05:41:04Zurn:sha1:c303bcde76d0d90a5c6e623466fd3c8d7ff3a072
- hasflag(argv,argc,f): single-char flag present (-f or within -abc)
- optval(argv,argc,opt): value for -opt (-n 5 or -n5)
- wc supports -l/-w/-c (default all); head supports -n N (and bare N)
tools: wc, head, and an argc/argv demo (args) + libc.c helpers2026-07-16T05:30:34Zuseruser@clank2026-07-16T05:30:34Zurn:sha1:8682553498d32d3c18dea41c598ab40de18404a3
- c/libc.c: shared C helpers linked into every program - putu (print decimal),
atou (parse decimal), argv_parse (tokenize getargs() into argc/argv).
- wc: count lines/words/chars of stdin. head [n]: first n lines (drains rest to
EOF). args: argc/argv demo.
- pid now uses libc putu; build.sh links libc.c; Makefile CBLOBS + libc dep.
- README: document the new tools + argv_parse.
- verified: 'args one two three' -> argc=3/argv[..]; wc '2 3 16'; head 2.