acl_get_fd(3) [centos man page]

ACL_GET_FD(3)						   BSD Library Functions Manual 					     ACL_GET_FD(3)

NAME

     acl_get_fd -- get an ACL by file descriptor

LIBRARY

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

SYNOPSIS

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

     acl_t
     acl_get_fd(int fd);

DESCRIPTION

     The acl_get_fd() function retrieves the access ACL associated with the file referred to by fd.  The ACL is placed into working storage and
     acl_get_fd() returns a pointer to that storage.

     In order to read an ACL from an object, a process must have read access to the object's attributes.

     This function 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 returned by acl_get_fd() as an argument.

RETURN VALUE

     On success, this function shall return a pointer to the working storage.  On error, a value of (acl_t)NULL shall be returned, and errno is
     set appropriately.

ERRORS

     If any of the following conditions occur, the acl_get_fd() function returns a value of (acl_t)NULL and sets errno to the corresponding value:

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

     [ENOMEM]		The ACL working storage requires more memory than is allowed by the hardware or system-imposed memory management con-
			straints.

     [ENOTSUP]		The file system on which the file identified by fd is located does not support ACLs, or ACLs are disabled.

STANDARDS

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

SEE ALSO

     acl_free(3), acl_get_entry(3), acl_get_file(3), acl_set_fd(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(3)						   BSD 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() function 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 associated with the object referred to by fd.  The ACL in the working stor-
     age shall not participate in any access control decisions.

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
     returned, 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 appro-
			priate 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 argument 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_set(3), posix1e(3)

STANDARDS

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

AUTHORS

     Michael Smith
     Robert N M Watson

BSD
								 December 29, 2002							       BSD