STATVFS(3) | Library Functions Manual | STATVFS(3) |
statvfs
, fstatvfs
— get file system statistics
#include
<sys/statvfs.h>
int
statvfs
(const
char *path, struct
statvfs *buf);
int
fstatvfs
(int
fd, struct statvfs
*buf);
statvfs
()
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.
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
statvfs
() fails if one or more of the
following are true:
ENOTDIR
]ENAMETOOLONG
]NAME_MAX
characters, or an entire pathname (including the terminating NUL) exceeded
PATH_MAX
bytes.ENOENT
]EACCES
]ELOOP
]EFAULT
]EIO
]fstatvfs
() fails if one or more of the
following are true:
The statvfs
() and
fstatvfs
() functions conform to
IEEE Std 1003.1-2001 (“POSIX.1”).
The statvfs
() and
fstatvfs
() functions first appeared in
OpenBSD 4.4.
January 29, 2015 | OpenBSD-6.8 |