STATVFS(3) OpenBSD Programmer's Manual STATVFS(3)NAME
statvfs, fstatvfs - get file system statistics
SYNOPSIS
#include <sys/statvfs.h>
int
statvfs(const char *path, struct statvfs *buf);
int
fstatvfs(int fd, struct statvfs *buf);
DESCRIPTIONstatvfs() returns information about a mounted file system. path is the
path name of any file within the mounted file system. buf is a pointer
to a statvfs structure defined as follows:
struct statvfs {
unsigned long f_bsize; /* file system block size */
unsigned long f_frsize; /* fundamental file system block size */
fsblkcnt_t f_blocks; /* number of blocks (unit f_frsize) */
fsblkcnt_t f_bfree; /* free blocks in file system */
fsblkcnt_t f_bavail; /* free blocks for non-root */
fsfilcnt_t f_files; /* total file inodes */
fsfilcnt_t f_ffree; /* free file inodes */
fsfilcnt_t f_favail; /* free file inodes for to non-root */
unsigned long f_fsid; /* file system id */
unsigned long f_flag; /* bit mask of f_flag values */
unsigned long f_namemax; /* maximum filename length */
};
#define ST_RDONLY 0x0001UL /* read-only filesystem */
#define ST_NOSUID 0x0002UL /* nosuid flag set */
The fields of type fsblkcnt_t are reported in units of f_frsize.
fstatvfs() returns the same information about an open file referenced by
descriptor fd.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, -1 is
returned and the global variable errno is set to indicate the error.
ERRORSstatvfs() fails if one or more of the following are true:
[ENOTDIR] A component of the path prefix of path is not a directory.
[ENAMETOOLONG]
The length of a component of path exceeds {NAME_MAX}
characters, or the length of path exceeds {PATH_MAX}
characters.
[ENOENT] The file referred to by path does not exist.
[EACCES] Search permission is denied for a component of the path
prefix of path.
[ELOOP] Too many symbolic links were encountered in translating
path.
[EFAULT] buf or path points to an invalid address.
[EIO] An I/O error occurred while reading from or writing to the
file system.
fstatvfs() fails if one or more of the following are true:
[EBADF] fd is not a valid open file descriptor.
[EFAULT] buf points to an invalid address.
[EIO] An I/O error occurred while reading from or writing to the
file system.
SEE ALSOdf(1), mount(2), stat(2), statfs(2)STANDARDS
The statvfs() and fstatvfs() functions conform to IEEE Std 1003.1-2001
(``POSIX'').
HISTORY
The statvfs() and fstatvfs() functions first appeared in OpenBSD 4.4.
OpenBSD 4.9 March 26, 2008 OpenBSD 4.9
