acl_get_entry(3) [redhat man page]

ACL_GET_ENTRY(3)					   BSD Library Functions Manual 					  ACL_GET_ENTRY(3)

NAME

     acl_get_entry -- get an ACL entry

LIBRARY

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

SYNOPSIS

     #include <sys/types.h>
     #include <sys/acl.h>

     int
     acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p);

DESCRIPTION

     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.

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 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.

ERRORS

     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.

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
     <a.gruenbacher@computer.org>.

Linux ACL							  March 23, 2002							 Linux ACL

Check Out this Related Man Page

ACL_GET_ENTRY(3)					   BSD Library Functions Manual 					  ACL_GET_ENTRY(3)

NAME

     acl_get_entry -- retrieve an ACL entry from an ACL

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/types.h>
     #include <sys/acl.h>

     int
     acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p);

DESCRIPTION

     The acl_get_entry() function is a POSIX.1e call that retrieves a descriptor for an ACL entry specified by the argument entry_d within the ACL
     indicated by the argument acl.

     If the value of entry_id is ACL_FIRST_ENTRY, then the function will return in entry_p a descriptor for the first 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 successfull call to 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 result is unspecified.

     The caller may also set entry_id to the index of the desired entry within the ACL.  This is a non-portable extension.  A subsequent call with
     entry_id set to ACL_NEXT_ENTRY will return the entry following the previously nominated entry and so forth.

RETURN VALUES

     If the acl_get_entry() function successfully obtains an ACL entry, a value of 0 is returned.  Otherwise, a value of -1 will be returned and
     the global variable errno will be set to indicate the error.

ERRORS

     The acl_get_entry() fails if:

     [EINVAL]		Argument acl does not point to a valid ACL.  Argument entry_id is neither ACL_FIRST_ENTRY, ACL_NEXT_ENTRY or a valid entry
			index.

     [EINVAL]		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().

SEE ALSO

     acl(3), acl_calc_mask(3), acl_create_entry(3), acl_delete_entry(3), acl_dup(3), acl_from_text(3), acl_get_fd(3), acl_get_file(3),
     acl_init(3), acl_set_fd(3), acl_set_file(3), acl_valid(3), posix1e(3)

STANDARDS

     POSIX.1e is described in IEEE POSIX.1e draft 17.

AUTHORS

     Michael Smith
     Chris D. Faulhaber

BSD
								  April 13, 2001							       BSD

Linux and UNIX Man Pages

acl_get_entry(3) [redhat man page]

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