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| author | user <user@clank> | 2026-07-16 13:07:28 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-16 13:07:28 +0200 |
| commit | fc6f690727aac2b5c9bd368f9b13188fb0ba36a7 (patch) | |
| tree | 5cf80045737ddcd267d484318fa782ba5faf7efb /src/fs.asm | |
| parent | fs rewrite stage 3: nested directories, paths, cwd (cd/mkdir/ls) (diff) | |
| download | gbos-fc6f690727aac2b5c9bd368f9b13188fb0ba36a7.tar.gz gbos-fc6f690727aac2b5c9bd368f9b13188fb0ba36a7.tar.xz gbos-fc6f690727aac2b5c9bd368f9b13188fb0ba36a7.zip | |
fs: reject open()/read() on a directory (EISDIR)
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.)
Diffstat (limited to '')
| -rw-r--r-- | src/fs.asm | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -678,6 +678,13 @@ sys_open:: ld [wFsDir], a call dir_find ; A = target inode or 0 ld [wFsInode], a + or a + jr z, .notdir ; doesn't exist yet: no type to check + call inode_ptr + ld a, [hl] ; I_TYPE + cp IT_DIR + jr z, .isdir ; can't open a directory as a file +.notdir ld a, [wFsMode] or a jr nz, .write @@ -730,6 +737,9 @@ sys_open:: ld a, c cp OF_MAX jr c, .ofl +.isdir + ld a, $FE ; EISDIR: is a directory + ret .fail ld a, $FF ret |