|ACL_GET_ENTRY(3)||Library Functions Manual||ACL_GET_ENTRY(3)|
LIBRARY¶Linux Access Control Lists library (libacl, -lacl).
acl, int entry_id,
acl_get_entry() function obtains a descriptor for an ACL entry as specified by entry_id within the ACL indicated by the argument acl. If the value of entry_id is ACL_FIRST_ENTRY, then the function returns in entry_p a descriptor for the first ACL entry within acl. If the value of entry_id is ACL_NEXT_ENTRY, then the function returns in entry_p a descriptor for the next ACL entry within acl.
If a call is made to
entry_id set to ACL_NEXT_ENTRY when there has not been
either an initial successful call to
acl_get_entry(), or a previous successful call to
acl_get_entry() following a call to
acl_valid(), then the effect is unspecified.
acl_get_entry() do not modify any
ACL entries. Subsequent operations using the returned ACL entry descriptor
operate on the ACL entry within the ACL in working storage. The order of all
existing entries in the ACL remains unchanged. Any existing ACL entry
descriptors that refer to entries within the ACL continue to refer to those
entries. Any existing ACL pointers that refer to the ACL referred to by
acl continue to refer to the ACL.
RETURN VALUE¶If the function successfully obtains an ACL entry, the function returns a value of
1. If the ACL has no ACL entries, the function returns the value
0. If the value of entry_id is ACL_NEXT_ENTRY and the last ACL entry in the ACL has already been returned by a previous call to
acl_get_entry(), the function returns the value
0until a successful call with an entry_id of ACL_FIRST_ENTRY is made. Otherwise, the value
-1is returned and errno is set to indicate the error.
ERRORS¶If any of the following conditions occur, the
acl_get_entry() function returns
-1and sets errno to the corresponding value:
- The argument acl_p is not a valid pointer to an ACL.
The argument entry_id is neither ACL_NEXT_ENTRY nor ACL_FIRST_ENTRY.
STANDARDS¶IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
SEE ALSO¶acl_calc_mask(3), acl_create_entry(3), acl_copy_entry(3), acl_delete_entry(3), acl_get_file(3), acl(5)
AUTHOR¶Derived from the FreeBSD manual pages written by
Robert N M Watson ⟨rwatson@FreeBSD.org⟩, and adapted for Linux by
Andreas Gruenbacher ⟨email@example.com⟩.
|March 23, 2002||Linux ACL|