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erofs-freebsd-out-tree/tests/TC139-fifo-acl-xattr-readonly.md
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2026-08-18 09:20:44 +02:00

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# Test Case: FIFO ACL and xattr read-only VOPs
**Test ID**: TC139-fifo-acl-xattr-readonly
**Fixture**: `basic.erofs`, `/fifo-node`
## Objective
Verify FIFO stat, ACL, and xattr reads without opening FIFO data, and require
read-only errors for all mutations. The transformer must record the regular
placeholder to FIFO `i_mode` change and ACL body fields.
## Manual steps
```sh
stat -f 'type=%HT mode=%Sp size=%z inode=%i' /mnt/repo22-g4/fifo-node
getfacl -n /mnt/repo22-g4/fifo-node
lsextattr system /mnt/repo22-g4/fifo-node
lsextattr user /mnt/repo22-g4/fifo-node
getextattr -qq -x system posix_acl_access /mnt/repo22-g4/fifo-node
getextattr -qq -x user fifo_note /mnt/repo22-g4/fifo-node
truss -o /tmp/tc139-acl.truss setfacl -m u::rwx /mnt/repo22-g4/fifo-node
truss -o /tmp/tc139-set.truss setextattr user repo22 changed \
/mnt/repo22-g4/fifo-node
truss -o /tmp/tc139-del.truss rmextattr system posix_acl_access \
/mnt/repo22-g4/fifo-node
```
## Expected results
Stat reports FIFO, reads return the exact ACL and `fifo-readonly-xattr`, and
all three mutations return `EROFS` (30). Nothing blocks or logs a trap. Clean up.