LIBRARYLinux Access Control Lists library (libacl, -lacl).
SYNOPSISIn sys/types.h In sys/acl.h Ft int Fn acl_create_entry acl_t *acl_p acl_entry_t *entry_p
DESCRIPTIONThe Fn acl_create_entry function creates a new ACL entry in the ACL pointed to by the contents of the pointer argument acl_p On success, the function returns a descriptor for the new ACL entry via entry_p
This function may cause memory to be allocated. The caller should free any releasable memory, when the new ACL is no longer required, by calling acl_free3 with (void*)*acl_p as an argument. If the ACL working storage cannot be increased in the current location, then the working storage for the ACL pointed to by acl_p may be relocated and the previous working storage is released. A pointer to the new working storage is returned via acl_p
The components of the new ACL entry are initialized in the following ways: the ACL tag type component contains ACL_UNDEFINED_TAG, the qualifier component contains ACL_UNDEFINED_ID, and the set of permissions has no permissions enabled. Any existing ACL entry descriptors that refer to entries in the ACL continue to refer to those entries.
RETURN VALUERv -std acl_create_entry
ERRORSIf any of the following conditions occur, the Fn acl_create_entry function returns -1 and sets errno to the corresponding value:
- Bq Er EINVAL
- The argument acl_p is not a valid pointer to an ACL.
- Bq Er ENOMEM
- The ACL working storage requires more memory than is allowed by the hardware or system-imposed memory management constraints.