getfsstat(2)getfsstat(2)NAMEgetfsstat - Get a list of all mounted file systems
#include <sys/types.h> #include <sys/mount.h>
struct statfs buf,
int flags );
An array of statfs structures. Specifies the size in bytes of the buf
parameter. Specifies one of the following flags: Wait for an update
from each file system before returning information. Return information
without requesting an update from each file system. Thus, some of the
information will be out of date, but the getfsstat() function will not
block because it is waiting for information from a file system that is
unable to respond.
The getfsstat() function returns information about all mounted file
systems. Upon successful completion, the buffer pointed to by the buf
parameter is filled with an array of statfs structures, one for each
mounted file system up to the size specified by the bufsize parameter.
If the buf parameter is given as 0 (zero), the getfsstat() function
returns just the number of mounted file systems.
Upon successful completion, the number of statfs structures is
returned. Otherwise, -1 is returned and errno is set to indicate the
If the getfsstat() function fails, errno may be set to one of the fol‐
lowing values: The buf parameter points to an invalid address. An I/O
error occurred while reading from or writing to the file system.