GETMNTINFO(3)

NAME
getmntinfo, getmntvinfo - get information about mounted file systems

LIBRARY
libc

SYNOPSIS
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
int
getmntinfo(struct statfs **mntbufp, int flags);
int
getmntvinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, int flags);

DESCRIPTION
The getmntinfo() function returns an array of statfs() structures describing each currently mounted file system (see statfs(2)).

The getmntinfo() function passes its flags argument transparently to getfsstat(2).

The getmntvinfo() function returns an array of statfs and statvfs structures describing each currently mounted file system (see statfs(2)), and otherwise works like getmntinfo().

RETURN VALUES
On successful completion, getmntinfo() returns a count of the number of elements in the array. The pointer to the array is stored into mntbufp.

If an error occurs, zero is returned and the external variable errno is set to indicate the error. Although the pointer mntbufp will be unmodified, any information previously returned by getmntinfo() will be lost.

The getmntvinfo() function additionally stores the pointer to the statvfs array into mntvbufp.

ERRORS
The getmntinfo() and getmntvinfo() functions may fail and set errno for any of the errors specified for the library routines getfsstat(2), getvfsstat(2) or malloc(3).

SEE ALSO
getfsstat(2), getvfsstat(2), mount(2), statfs(2), mount(8)

HISTORY
The getmntinfo() function first appeared in 4.4BSD.

The getmntvinfo() function first appeared in DragonFly 1.13.

BUGS
The getmntinfo() and getmntvinfo() functions write the array of structures to an internal static object and returns a pointer to that object. Subsequent calls to getmntinfo() or getmntvinfo() will modify the same object.

The memory allocated by getmntinfo() or getmntvinfo() cannot be free(3)'d by the application.