|
PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
FSTATVFS(3P) POSIX Programmer's Manual FSTATVFS(3P)
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior), or
the interface may not be implemented on Linux.
fstatvfs, statvfs — get file system information
#include <sys/statvfs.h>
int fstatvfs(int fildes, struct statvfs *buf);
int statvfs(const char *restrict path, struct statvfs *restrict buf);
The fstatvfs() function shall obtain information about the file
system containing the file referenced by fildes.
The statvfs() function shall obtain information about the file system
containing the file named by path.
For both functions, the buf argument is a pointer to a statvfs
structure that shall be filled. Read, write, or execute permission of
the named file is not required.
The following flags can be returned in the f_flag member:
ST_RDONLY Read-only file system.
ST_NOSUID Setuid/setgid bits ignored by exec.
It is unspecified whether all members of the statvfs structure have
meaningful values on all file systems.
Upon successful completion, statvfs() shall return 0. Otherwise, it
shall return −1 and set errno to indicate the error.
The fstatvfs() and statvfs() functions shall fail if:
EIO An I/O error occurred while reading the file system.
EINTR A signal was caught during execution of the function.
EOVERFLOW
One of the values to be returned cannot be represented
correctly in the structure pointed to by buf.
The fstatvfs() function shall fail if:
EBADF The fildes argument is not an open file descriptor.
The statvfs() function shall fail if:
EACCES Search permission is denied on a component of the path prefix.
ELOOP A loop exists in symbolic links encountered during resolution
of the path argument.
ENAMETOOLONG
The length of a component of a pathname is longer than
{NAME_MAX}.
ENOENT A component of path does not name an existing file or path is
an empty string.
ENOTDIR
A component of the path prefix names an existing file that is
neither a directory nor a symbolic link to a directory, or the
path argument contains at least one non-<slash> character and
ends with one or more trailing <slash> characters and the last
pathname component names an existing file that is neither a
directory nor a symbolic link to a directory.
The statvfs() function may fail if:
ELOOP More than {SYMLOOP_MAX} symbolic links were encountered during
resolution of the path argument.
ENAMETOOLONG
The length of a pathname exceeds {PATH_MAX}, or pathname
resolution of a symbolic link produced an intermediate result
with a length that exceeds {PATH_MAX}.
The following sections are informative.
Obtaining File System Information Using fstatvfs()
The following example shows how to obtain file system information for
the file system upon which the file named /home/cnd/mod1 resides,
using the fstatvfs() function. The /home/cnd/mod1 file is opened with
read/write privileges and the open file descriptor is passed to the
fstatvfs() function.
#include <sys/statvfs.h>
#include <fcntl.h>
struct statvfs buffer;
int status;
...
fildes = open("/home/cnd/mod1", O_RDWR);
status = fstatvfs(fildes, &buffer);
Obtaining File System Information Using statvfs()
The following example shows how to obtain file system information for
the file system upon which the file named /home/cnd/mod1 resides,
using the statvfs() function.
#include <sys/statvfs.h>
struct statvfs buffer;
int status;
...
status = statvfs("/home/cnd/mod1", &buffer);
None.
None.
None.
chmod(3p), chown(3p), creat(3p), dup(3p), exec(1p), fcntl(3p),
link(3p), mknod(3p), open(3p), pipe(3p), read(3p), time(3p),
unlink(3p), utime(3p), write(3p)
The Base Definitions volume of POSIX.1‐2008, sys_statvfs.h(0p)
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) In the event of any discrepancy between this version and
the original IEEE and The Open Group Standard, the original IEEE and
The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 FSTATVFS(3P)
Pages that refer to this page: sys_statvfs.h(0p), chmod(3p), exec(3p), fchmod(3p), statvfs(3p)