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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | SEE ALSO | AUTHOR | COLOPHON |
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ACL_GET_ENTRY(3) Library Functions Manual ACL_GET_ENTRY(3)
acl_get_entry — get an ACL entry
Linux Access Control Lists library (libacl, -lacl).
<sys/types.h> <sys/acl.h> int acl_get_entry(acl_t acl, int
entry_id, acl_entry_t *entry_p)
The 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 acl_get_entry() with 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_calc_mask(),
acl_copy_int(), acl_create_entry(), acl_delete_entry(),
acl_dup(), acl_from_text(), acl_get_fd(), acl_get_file(),
acl_set_fd(), acl_set_file(), or acl_valid(), then the effect is
unspecified.
Calls to 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.
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 0 until a successful call with an entry_id of
ACL_FIRST_ENTRY is made. Otherwise, the value -1 is returned and
errno is set to indicate the error.
If any of the following conditions occur, the acl_get_entry()
function returns -1 and sets errno to the corresponding value:
[EINVAL] 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.
IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)
acl_calc_mask(3), acl_create_entry(3), acl_copy_entry(3),
acl_delete_entry(3), acl_get_file(3), acl(5)
Derived from the FreeBSD manual pages written by Robert N M
Watson <rwatson@FreeBSD.org>, and adapted for Linux by Andreas
Gruenbacher <andreas.gruenbacher@gmail.com>.
This page is part of the acl (manipulating access control lists)
project. Information about the project can be found at
http://savannah.nongnu.org/projects/acl. If you have a bug
report for this manual page, see
⟨http://savannah.nongnu.org/bugs/?group=acl⟩. This page was
obtained from the project's upstream Git repository
⟨git://git.savannah.nongnu.org/acl.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-04-25.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Linux ACL March 23, 2002 ACL_GET_ENTRY(3)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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