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ACL_GET(3)		    Library Functions Manual		    ACL_GET(3)

NAME
       acl_get_fd,  acl_get_fd_np, acl_get_file, acl_get_link_np -- get	an ACL
       for a file

LIBRARY
       Standard	C Library (libc, -lc)

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

       acl_t
       acl_get_fd(int fd);

       acl_t
       acl_get_fd_np(int fd, acl_type_t	type);

       acl_t
       acl_get_file(const char *path_p,	acl_type_t type);

       acl_t
       acl_get_link_np(const char *path_p, acl_type_t type);

DESCRIPTION
       The    acl_get_fd(),	acl_get_file(),	    acl_get_link_np(),	   and
       acl_get_fd_np()	each  allow  the retrieval of an ACL from a file.  The
       acl_get_fd() is a POSIX.1e call that allows the retrieval of an ACL  of
       type ACL_TYPE_ACCESS from a file	descriptor.  The acl_get_fd_np() func-
       tion  is	 a non-portable	form of	acl_get_fd() that allows the retrieval
       of any type of ACL from a file descriptor.  The acl_get_file() function
       is a POSIX.1e call that allows the retrieval of a specified type	of ACL
       from a file by name; acl_get_link_np() is a non-portable	 variation  on
       acl_get_file()  which  does  not	 follow	a symlink if the target	of the
       call is a symlink.

       These functions 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	the (void *)acl_t as an	argument.

       The ACL in the working storage is an independent	copy of	the ACL	 asso-
       ciated with the object referred to by fd.  The ACL in the working stor-
       age shall not participate in any	access control decisions.

       Valid values for	the type argument are:

	  ACL_TYPE_ACCESS     POSIX.1e access ACL
	  ACL_TYPE_DEFAULT    POSIX.1e default ACL
	  ACL_TYPE_NFS4	      NFSv4 ACL

       The ACL returned	will be	branded	accordingly.

IMPLEMENTATION NOTES
       FreeBSD's  support  for POSIX.1e	interfaces and features	is still under
       development at this time.

RETURN VALUES
       Upon successful completion, the function	shall return a pointer to  the
       ACL that	was retrieved.	Otherwise, a value of (acl_t)NULL shall	be re-
       turned, and errno shall be set to indicate the error.

ERRORS
       If  any	of  the	 following conditions occur, the acl_get_fd() function
       shall return a value of (acl_t)NULL and set errno to the	 corresponding
       value:

       [EACCES]		  Search  permission  is denied	for a component	of the
			  path prefix, or the object exists  and  the  process
			  does not have	appropriate access rights.

       [EBADF]		  The fd argument is not a valid file descriptor.

       [EINVAL]		  The ACL type passed is invalid for this file object.

       [ENAMETOOLONG]	  A  component	of a pathname exceeded 255 characters,
			  or an	entire path name exceeded 1023 characters.

       [ENOENT]		  The named object does	not exist, or the path_p argu-
			  ment points to an empty string.

       [ENOMEM]		  Insufficient memory available	to fulfill request.

       [EOPNOTSUPP]	  The file system does not support ACL retrieval.

SEE ALSO
       acl(3),	acl_free(3),  acl_get(3),   acl_get_brand_np(3),   acl_set(3),
       posix1e(3)

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

HISTORY
       POSIX.1e	support	was introduced in FreeBSD 4.0.

AUTHORS
       Robert N	M Watson

FreeBSD	13.2		      September	21, 2023		    ACL_GET(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | AUTHORS

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