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Linux ACL
March 23, 2002


Access control list utilities, libraries and headers


access control list - static libraries and headers


Files needed for building programs with libacl


acl_create_entry - create a new ACL entry


Linux Access Control Lists library (libacl, -lacl).


.In sys/types.h
.In sys/acl.h int acl_create_entry acl_t *acl_p acl_entry_t *entry_p


The 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_free(3) 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.


.Rv -std acl_create_entry


If any of the following conditions occur, the acl_create_entry function returns -1 and sets errno to the corresponding value:
The argument acl_p is not a valid pointer to an ACL.
The ACL working storage requires more memory than is allowed by the hardware or system-imposed memory management constraints.


IEEE Std 1003.1e draft 17 (\(lqPOSIX.1e\(rq, abandoned)


Derived from the FreeBSD manual pages written by
.An Robert N M Watson Aq , and adapted for Linux by
.An Andreas Gruenbacher Aq .
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