NAME

       getfsstat — get list of all mounted file systems

LIBRARY

       Standard C Library (libc, -lc)

SYNOPSIS

       #include <sys/param.h>
       #include <sys/ucred.h>
       #include <sys/mount.h>

       int
       getfsstat(struct statfs *buf, long bufsize, int flags);

DESCRIPTION

       The  getfsstat()  system  call returns information about all mounted file systems.  The buf argument is a
       pointer to statfs structures, as described in statfs(2).

       Fields that are undefined for a particular file system are set to -1.  The buffer is filled with an array
       of statfs structures, one for each mounted file system up to the byte count specified by bufsize.   Note,
       the bufsize argument is the number of bytes that buf can hold, not the count of statfs structures it will
       hold.

       If buf is given as NULL, getfsstat() returns just the number of mounted file systems.

       Normally  flags  should be specified as MNT_WAIT.  If flags is set to MNT_NOWAIT, getfsstat() will return
       the information it has available without requesting an update from each file system.  Thus, some  of  the
       information  will  be  out  of  date,  but getfsstat() will not block waiting for information from a file
       system that is unable to respond.

RETURN VALUES

       Upon successful completion, the number of statfs structures is returned.  Otherwise, -1 is  returned  and
       the global variable errno is set to indicate the error.

ERRORS

       The getfsstat() system call fails if one or more of the following are true:

       [EFAULT]           The buf argument points to an invalid address.

       [EIO]              An I/O error occurred while reading from or writing to the file system.

SEE ALSO

       statfs(2), fstab(5), mount(8)

HISTORY

       The getfsstat() system call first appeared in 4.4BSD.

Debian                                          November 20, 2003                                   GETFSSTAT(2)