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Restored fifo_pathconf() from rev.1.32. vop_stdpathconf() is too

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general to be of much use.  Using it here weakened the _PC_MAX_CANON,
_PC_MAX_INPUT and _PC_VDISABLE cases.

fifo_pathconf() is not quite correct either.  _PC_CHOWN_RESTRICTED
and _PC_LINK_MAX should be handled by the host file system.  For
directories, the host file system should let us handle _PC_PIPE_BUF.
This commit is contained in:
Bruce Evans 1997-12-13 12:58:09 +00:00
parent 2573d99c75
commit 5fb0d3e0b3
2 changed files with 64 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
sys/fs/fifofs/fifo_vnops.c
View File

@ -31,11 +31,12 @@
* SUCH DAMAGE.
*
* @(#)fifo_vnops.c 8.10 (Berkeley) 5/27/95
* $Id: fifo_vnops.c,v 1.37 1997/10/27 15:33:04 bde Exp $
* $Id: fifo_vnops.c,v 1.38 1997/12/05 19:55:46 bde Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/unistd.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
@ -71,6 +72,7 @@ static int fifo_ioctl __P((struct vop_ioctl_args *));
static int fifo_poll __P((struct vop_poll_args *));
static int fifo_inactive __P((struct vop_inactive_args *));
static int fifo_bmap __P((struct vop_bmap_args *));
static int fifo_pathconf __P((struct vop_pathconf_args *));
static int fifo_advlock __P((struct vop_advlock_args *));
@ -92,7 +94,7 @@ static struct vnodeopv_entry_desc fifo_vnodeop_entries[] = {
{ &vop_mkdir_desc, (vop_t *) fifo_badop },
{ &vop_mknod_desc, (vop_t *) fifo_badop },
{ &vop_open_desc, (vop_t *) fifo_open },
{ &vop_pathconf_desc, (vop_t *) vop_stdpathconf },
{ &vop_pathconf_desc, (vop_t *) fifo_pathconf },
{ &vop_poll_desc, (vop_t *) fifo_poll },
{ &vop_print_desc, (vop_t *) fifo_print },
{ &vop_read_desc, (vop_t *) fifo_read },
@ -482,6 +484,34 @@ fifo_print(ap)
return (0);
}
/*
* Return POSIX pathconf information applicable to fifo's.
*/
int
fifo_pathconf(ap)
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
int *a_retval;
} */ *ap;
{
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval = LINK_MAX;
return (0);
case _PC_PIPE_BUF:
*ap->a_retval = PIPE_BUF;
return (0);
case _PC_CHOWN_RESTRICTED:
*ap->a_retval = 1;
return (0);
default:
return (EINVAL);
}
/* NOTREACHED */
}
/*
* Fifo advisory byte-level locks.
*/

34
sys/miscfs/fifofs/fifo_vnops.c
View File

@ -31,11 +31,12 @@
* SUCH DAMAGE.
*
* @(#)fifo_vnops.c 8.10 (Berkeley) 5/27/95
* $Id: fifo_vnops.c,v 1.37 1997/10/27 15:33:04 bde Exp $
* $Id: fifo_vnops.c,v 1.38 1997/12/05 19:55:46 bde Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/unistd.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
@ -71,6 +72,7 @@ static int fifo_ioctl __P((struct vop_ioctl_args *));
static int fifo_poll __P((struct vop_poll_args *));
static int fifo_inactive __P((struct vop_inactive_args *));
static int fifo_bmap __P((struct vop_bmap_args *));
static int fifo_pathconf __P((struct vop_pathconf_args *));
static int fifo_advlock __P((struct vop_advlock_args *));
@ -92,7 +94,7 @@ static struct vnodeopv_entry_desc fifo_vnodeop_entries[] = {
{ &vop_mkdir_desc, (vop_t *) fifo_badop },
{ &vop_mknod_desc, (vop_t *) fifo_badop },
{ &vop_open_desc, (vop_t *) fifo_open },
{ &vop_pathconf_desc, (vop_t *) vop_stdpathconf },
{ &vop_pathconf_desc, (vop_t *) fifo_pathconf },
{ &vop_poll_desc, (vop_t *) fifo_poll },
{ &vop_print_desc, (vop_t *) fifo_print },
{ &vop_read_desc, (vop_t *) fifo_read },
@ -482,6 +484,34 @@ fifo_print(ap)
return (0);
}
/*
* Return POSIX pathconf information applicable to fifo's.
*/
int
fifo_pathconf(ap)
struct vop_pathconf_args /* {
struct vnode *a_vp;
int a_name;
int *a_retval;
} */ *ap;
{
switch (ap->a_name) {
case _PC_LINK_MAX:
*ap->a_retval = LINK_MAX;
return (0);
case _PC_PIPE_BUF:
*ap->a_retval = PIPE_BUF;
return (0);
case _PC_CHOWN_RESTRICTED:
*ap->a_retval = 1;
return (0);
default:
return (EINVAL);
}
/* NOTREACHED */
}
/*
* Fifo advisory byte-level locks.
*/