mount(3)                                                 mount(3)



NAME
     mount - mounts a file system

SYNOPSIS
     int mount(spec, dir, rwflag)
     char *spec, *dir;
     int rwflag;

DESCRIPTION
     mount requests that a removable file system contained on the
     block special file identified by spec be mounted on the
     directory identified by dir.  spec and dir are pointers to
     pathnames.

     Upon successful completion, references to the file dir will
     refer to the root directory on the mounted file system.

     The low-order bit of rwflag is used to control write
     permission on the mounted file system; if 1, writing is
     forbidden, otherwise writing is permitted according to
     individual file accessibility.  Physically write-protected
     and magnetic tape file systems must be mounted read-only or
     errors will occur when access times are updated, whether or
     not any explicit write is attempted.

     mount may be invoked only by the superuser.

STATUS MESSAGES AND VALUES
     Upon successful completion, a value of 0 is returned.
     Otherwise, a value of -1 is returned and errno is set to
     indicate the error.

     The mount program will fail if one or more of the following
     are true:

     EPERM
          The effective user ID is not superuser.

     ENOENT
          Any of the named files does not exist.

     ENOTDIR
          A component of a path prefix is not a directory.

     ENOTBLK
          spec is not a block special device.

     ENXIO
          The device associated with spec does not exist.

     ENOTDIR
          dir is not a directory.



January 1992                                                    1

mount(3)                                                 mount(3)



     EFAULT
          spec or dir points outside the allocated address space
          of the process.

     EBUSY
          dir is currently mounted on, is someone's current
          working directory, or is otherwise busy.

     EPERM
          A pathname contains a character with the high-order bit
          set.

     ENAMETOOLONG
          A component of a pathname exceeded NAME_MAX characters,
          or an entire pathname exceeded PATH_MAX.

     ELOOP
          Too many symbolic links were encountered in translating
          a pathname.

     EBUSY
          The device associated with spec is currently mounted.

     EBUSY
          There are no more mount table entries.

SEE ALSO
     fsmount(2), unmount(2), umount(3), fstab(4)



























2                                                    January 1992