table of contents
|GETFSSTAT(2)||System Calls Manual||GETFSSTAT(2)|
getfsstat — get
list of all mounted file systems
Standard C Library (libc, -lc)
statfs *buf, long
system call returns information about all mounted file systems. The
buf argument is a pointer to
statfs structures, as described in
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,
returns just the number of mounted file systems.
Normally mode should be
MNT_WAIT. If mode
is set to
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 Thus, some of the information will be out of date,
getfsstat() will not block waiting for
information from a file system that is unable to respond. It will also skip
any file system that is in the process of being unmounted, even if the
unmount would eventually fail.
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.
getfsstat() system call fails if one
or more of the following are true:
- The buf argument points to an invalid address.
- mode is set to a value other than
- An I/O error occurred while reading from or writing to the file system.
- Corrupted data was detected while reading from the file system.
getfsstat() system call first appeared
|March 30, 2020||Debian|