GETMNTINFO(3)          FreeBSD Library Functions Manual          GETMNTINFO(3)

NAME
     getmntinfo - get information about mounted file systems

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     getmntinfo(struct statfs **mntbufp, int mode);

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

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

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.

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

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

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

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

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

FreeBSD 13.1-RELEASE-p6        December 27, 2016       FreeBSD 13.1-RELEASE-p6