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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Copyright 1997 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_PATHCONF_H
#define _SYS_PATHCONF_H
/* pathconf.h 1.9 89/06/26 SMI */
#include <sys/unistd.h>
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* POSIX pathconf information
*
* static pathconf kludge notes:
* For NFSv2 servers, we've added a vop (vop_cntl) to dig out pathconf
* information. The mount program asked for the information from
* a remote mountd daemon. If it gets it, it passes the info
* down in a new args field. The info is passed in the struct below
* in nfsargs.pathconf. There's a new NFS mount flag so that you know
* this is happening. NFS stores the information locally; when a
* pathconf request is made, the request is intercepted at the client
* and the information is retrieved from the struct passed down by
* mount. It's a kludge that will go away as soon
* as we can ask the nfs protocol these sorts of questions (NFSr3).
* All code is noted by "static pathconf kludge" comments and is
* restricted to nfs code in the kernel.
*/
#define _BITS (8 * sizeof (short))
#define _PC_N ((_PC_LAST + _BITS - 1) / _BITS)
#define _PC_ISSET(n, a) (a[(n) / _BITS] & (1 << ((n) % _BITS)))
#define _PC_SET(n, a) (a[(n) / _BITS] |= (1 << ((n) % _BITS)))
#define _PC_ERROR 0
struct pathcnf {
/*
* pathconf() information
*/
int pc_link_max; /* max links allowed */
short pc_max_canon; /* max line len for a tty */
short pc_max_input; /* input a tty can eat all once */
short pc_name_max; /* max file name length (dir entry) */
short pc_path_max; /* path name len (/x/y/z/...) */
short pc_pipe_buf; /* size of a pipe (bytes) */
uchar_t pc_vdisable; /* safe char to turn off c_cc[i] */
char pc_xxx; /* alignment padding; cc_t == char */
short pc_mask[_PC_N]; /* see below */
#ifdef _KERNEL
short pc_refcnt; /* number of mounts that use this */
struct pathcnf *pc_next; /* linked list */
#endif
};
#ifdef _SYSCALL32
struct pathcnf32 {
/*
* pathconf() information
*/
int32_t pc_link_max; /* max links allowed */
int16_t pc_max_canon; /* max line len for a tty */
int16_t pc_max_input; /* input a tty can eat all once */
int16_t pc_name_max; /* max file name length (dir entry) */
int16_t pc_path_max; /* path name len (/x/y/z/...) */
int16_t pc_pipe_buf; /* size of a pipe (bytes) */
uint8_t pc_vdisable; /* safe char to turn off c_cc[i] */
int8_t pc_xxx; /* alignment padding; cc_t == char */
int16_t pc_mask[_PC_N]; /* see below */
#ifdef _KERNEL
int16_t pc_refcnt; /* number of mounts that use this */
caddr32_t pc_next; /* linked list */
#endif
};
#endif /* _SYSCALL32 */
/*
* pc_mask is used to encode either
* a) boolean values (for chown_restricted and no_trunc)
* b) errno on/off (for link, canon, input, name, path, and pipe)
* The _PC_XXX values are defined in unistd.h; they start at 1 and go up
* sequentially.
* _PC_ERROR is used as the first bit to indicate total failure
* (all info invalid).
* To check for an error something like
* _PC_ISSET(_PC_PATHMAX, foo.pc_mask) != 0
* is used.
*/
/*
* The size of the non-kernel part of the struct.
*/
#ifdef _KERNEL
#define PCSIZ ((size_t)(&(((struct pathcnf *)0)->pc_refcnt)))
#define PCCMP(p1, p2) bcmp((char *)p1, (char *)p2, PCSIZ)
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_PATHCONF_H */
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