acl_copy_ext(3) [suse man page]

ACL_COPY_EXT(3) 					   BSD Library Functions Manual 					   ACL_COPY_EXT(3)

NAME

     acl_copy_ext -- copy an ACL from internal to external representation

LIBRARY

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

SYNOPSIS

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

     ssize_t
     acl_copy_ext(void *buf_p, acl_t acl, ssize_t size);

DESCRIPTION

     The acl_copy_ext() function copies the ACL pointed to by acl from system-managed space to the user managed space pointed to by buf_p.  The
     size parameter represents the size in bytes of the buffer pointed to by buf_p.  The format of the ACL placed in the buffer pointed to by
     buf_p is a contiguous, persistent data item, the format of which is unspecified.  It is the responsibility of the invoker to allocate an area
     large enough to hold the copied ACL. The size of the exportable, contiguous, persistent form of the ACL may be obtained by invoking the
     acl_size() function.

     Any ACL entry descriptors that refer to an entry in the ACL referenced by acl continue to refer to those entries. Any existing ACL pointers
     that refer to the ACL referenced by acl continue to refer to the ACL.

RETURN VALUE

     Upon success, this function returns the number of bytes placed in the buffer pointed to by buf_p.	On error, a value of (ssize_t)-1 is
     returned and errno is set appropriately.

ERRORS

     If any of the following conditions occur, the acl_copy_ext() function returns a value of (ssize_t)-1 and sets errno to the corresponding
     value:

     [EINVAL]		The size parameter is zero or negative.

			The argument acl is not a valid pointer to an ACL.

			The ACL referenced by acl contains one or more improperly formed ACL entries, or for some other reason cannot be trans-
			lated into the external form of an ACL.

     [ERANGE]		The size parameter is greater than zero but smaller than the length of the contiguous, persistent form of the ACL.

STANDARDS

     IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)

SEE ALSO

     acl_copy_int(3), acl_size(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@bestbits.at>.

Linux ACL							  March 23, 2002							 Linux ACL

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