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/*
* Copyright (c) 2001 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
* USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <asm/types.h>
#include <xattr.h>
#include <attributes.h>
#undef MAXNAMELEN
#define MAXNAMELEN 256
static const char *user_name = "user.";
static const char *root_name = "xfsroot.";
/*
* Convert IRIX API components into Linux/XFS API components
*/
static int
api_convert(char *name, const char *irixname, int irixflags)
{
int len = strlen(irixname);
if (len >= MAXNAMELEN) {
errno = EINVAL;
return -1;
}
if (irixflags & ATTR_ROOT)
strcpy(name, root_name);
else
strcpy(name, user_name);
strcat(name, irixname);
return 0;
}
int
attr_get(const char *path, const char *attrname, char *attrvalue,
int *valuelength, int flags)
{
int c;
char name[MAXNAMELEN+16];
if ((c = api_convert(name, attrname, flags)) < 0)
return c;
if (flags & ATTR_DONTFOLLOW)
c = lgetxattr(path, name, attrvalue, *valuelength);
else
c = getxattr(path, name, attrvalue, *valuelength);
if (c < 0)
return c;
*valuelength = c;
return 0;
}
int
attr_getf(int fd, const char *attrname, char *attrvalue,
int *valuelength, int flags)
{
int c;
char name[MAXNAMELEN+16];
if ((c = api_convert(name, attrname, flags)) < 0)
return c;
c = fgetxattr(fd, name, attrvalue, *valuelength);
if (c < 0)
return c;
*valuelength = c;
return 0;
}
int
attr_set(const char *path, const char *attrname, const char *attrvalue,
const int valuelength, int flags)
{
int c, lflags = 0;
char name[MAXNAMELEN+16];
void *buffer = (void *)attrvalue;
if (flags & ATTR_CREATE)
lflags = XATTR_CREATE;
else if (flags & ATTR_REPLACE)
lflags = XATTR_REPLACE;
if ((c = api_convert(name, attrname, flags)) < 0)
return c;
if (flags & ATTR_DONTFOLLOW)
return lsetxattr(path, name, buffer, valuelength, lflags);
return setxattr(path, name, buffer, valuelength, lflags);
}
int
attr_setf(int fd, const char *attrname,
const char *attrvalue, const int valuelength, int flags)
{
int c, lflags = 0;
char name[MAXNAMELEN+16];
void *buffer = (void *)attrvalue;
if (flags & ATTR_CREATE)
lflags = XATTR_CREATE;
else if (flags & ATTR_REPLACE)
lflags = XATTR_REPLACE;
if ((c = api_convert(name, attrname, flags)) < 0)
return c;
return fsetxattr(fd, name, buffer, valuelength, lflags);
}
int
attr_remove(const char *path, const char *attrname, int flags)
{
int c;
char name[MAXNAMELEN+16];
if ((c = api_convert(name, attrname, flags)) < 0)
return c;
if (flags & ATTR_DONTFOLLOW)
return lremovexattr(path, name);
return removexattr(path, name);
}
int
attr_removef(int fd, const char *attrname, int flags)
{
int c;
char name[MAXNAMELEN+16];
if ((c = api_convert(name, attrname, flags)) < 0)
return c;
return fremovexattr(fd, name);
}
/*
* Helper routines for the attr_multi functions. In IRIX, the
* multi routines are a single syscall - in Linux, we break em
* apart in userspace and make individual syscalls for each.
*/
static int
attr_single(const char *path, attr_multiop_t *op, int flags)
{
int r = -1;
errno = -EINVAL;
flags |= op->am_flags;
if (op->am_opcode & ATTR_OP_GET)
r = attr_get(path, op->am_attrname, op->am_attrvalue,
&op->am_length, flags);
else if (op->am_opcode & ATTR_OP_SET)
r = attr_set(path, op->am_attrname, op->am_attrvalue,
op->am_length, flags);
else if (op->am_opcode & ATTR_OP_REMOVE)
r = attr_remove(path, op->am_attrname, flags);
return r;
}
static int
attr_singlef(const int fd, attr_multiop_t *op, int flags)
{
int r = -1;
errno = -EINVAL;
flags |= op->am_flags;
if (op->am_opcode & ATTR_OP_GET)
r = attr_getf(fd, op->am_attrname, op->am_attrvalue,
&op->am_length, flags);
else if (op->am_opcode & ATTR_OP_SET)
r = attr_setf(fd, op->am_attrname, op->am_attrvalue,
op->am_length, flags);
else if (op->am_opcode & ATTR_OP_REMOVE)
r = attr_removef(fd, op->am_attrname, flags);
return r;
}
/*
* Operate on multiple attributes of the same object simultaneously
*
* From the manpage: "attr_multi will fail if ... a bit other than
* ATTR_DONTFOLLOW was set in the flag argument." flags must be
* checked here as they are not passed into the kernel.
*/
int
attr_multi(const char *path, attr_multiop_t *multiops, int count, int flags)
{
int i, tmp, r = -1;
errno = EINVAL;
if ((flags & ATTR_DONTFOLLOW) != flags)
return r;
r = errno = 0;
for (i = 0; i < count; i++) {
tmp = attr_single(path, &multiops[i], flags);
if (tmp) r = tmp;
}
return r;
}
int
attr_multif(int fd, attr_multiop_t *multiops, int count, int flags)
{
int i, tmp, r = -1;
errno = EINVAL;
if ((flags & ATTR_DONTFOLLOW) != flags)
return r;
r = errno = 0;
for (i = 0; i < count; i++) {
tmp = attr_singlef(fd, &multiops[i], flags);
if (tmp) r = tmp;
}
return r;
}
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