161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/*
|
|
* Copyright 2002 Massachusetts Institute of Technology
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and
|
|
* its documentation for any purpose and without fee is hereby
|
|
* granted, provided that both the above copyright notice and this
|
|
* permission notice appear in all copies, that both the above
|
|
* copyright notice and this permission notice appear in all
|
|
* supporting documentation, and that the name of M.I.T. not be used
|
|
* in advertising or publicity pertaining to distribution of the
|
|
* software without specific, written prior permission. M.I.T. makes
|
|
* no representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied
|
|
* warranty.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
|
|
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
|
|
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "namespace.h"
|
|
#include <sys/param.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/statvfs.h>
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <unistd.h>
|
|
#include "un-namespace.h"
|
|
|
|
static int sfs2svfs(const struct statfs *from, struct statvfs *to);
|
|
|
|
int
|
|
fstatvfs(int fd, struct statvfs *result)
|
|
{
|
|
struct statfs sfs;
|
|
int rv;
|
|
long pcval;
|
|
|
|
rv = _fstatfs(fd, &sfs);
|
|
if (rv != 0)
|
|
return (rv);
|
|
|
|
rv = sfs2svfs(&sfs, result);
|
|
if (rv != 0)
|
|
return (rv);
|
|
|
|
/*
|
|
* Whether pathconf's -1 return means error or unlimited does not
|
|
* make any difference in this best-effort implementation.
|
|
*/
|
|
pcval = _fpathconf(fd, _PC_NAME_MAX);
|
|
if (pcval == -1)
|
|
result->f_namemax = ~0UL;
|
|
else
|
|
result->f_namemax = (unsigned long)pcval;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
statvfs(const char * __restrict path, struct statvfs * __restrict result)
|
|
{
|
|
struct statfs sfs;
|
|
int rv;
|
|
long pcval;
|
|
|
|
rv = statfs(path, &sfs);
|
|
if (rv != 0)
|
|
return (rv);
|
|
|
|
sfs2svfs(&sfs, result);
|
|
|
|
/*
|
|
* Whether pathconf's -1 return means error or unlimited does not
|
|
* make any difference in this best-effort implementation.
|
|
*/
|
|
pcval = pathconf(path, _PC_NAME_MAX);
|
|
if (pcval == -1)
|
|
result->f_namemax = ~0UL;
|
|
else
|
|
result->f_namemax = (unsigned long)pcval;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sfs2svfs(const struct statfs *from, struct statvfs *to)
|
|
{
|
|
static const struct statvfs zvfs;
|
|
|
|
*to = zvfs;
|
|
|
|
if (from->f_flags & MNT_RDONLY)
|
|
to->f_flag |= ST_RDONLY;
|
|
if (from->f_flags & MNT_NOSUID)
|
|
to->f_flag |= ST_NOSUID;
|
|
|
|
/* XXX should we clamp negative values? */
|
|
#define COPY(field) \
|
|
do { \
|
|
to->field = from->field; \
|
|
if (from->field != to->field) { \
|
|
errno = EOVERFLOW; \
|
|
return (-1); \
|
|
} \
|
|
} while(0)
|
|
|
|
COPY(f_bavail);
|
|
COPY(f_bfree);
|
|
COPY(f_blocks);
|
|
COPY(f_ffree);
|
|
COPY(f_files);
|
|
to->f_bsize = from->f_iosize;
|
|
to->f_frsize = from->f_bsize;
|
|
to->f_favail = to->f_ffree;
|
|
return (0);
|
|
}
|
|
|
|
#ifdef MAIN
|
|
#include <err.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
struct statvfs buf;
|
|
|
|
if (statvfs(argv[1], &buf) < 0)
|
|
err(1, "statvfs");
|
|
|
|
#define SHOW(field) \
|
|
printf(#field ": %ju\n", (uintmax_t)buf.field)
|
|
|
|
SHOW(f_bavail);
|
|
SHOW(f_bfree);
|
|
SHOW(f_blocks);
|
|
SHOW(f_favail);
|
|
SHOW(f_ffree);
|
|
SHOW(f_files);
|
|
SHOW(f_bsize);
|
|
SHOW(f_frsize);
|
|
SHOW(f_namemax);
|
|
printf("f_flag: %lx\n", (unsigned long)buf.f_flag);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* MAIN */
|