MOUNT(2)                                                 MOUNT(2)



     NAME
          mount - mount a file system

     SYNOPSIS
          #include <sys/mount.h>

          int mount (spec, dir, mflag, fstyp)
          char *spec, *dir;
          int mflag, fstyp;

     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
          path names.  Fstyp is the file system type number.  The
          sysfs(2) system call can be used to determine the file
          system type number.  Note that if the MS_FSS flag bit of
          mflag is off, the file system type will default to the root
          file system type. Only if the bit is on will fstyp be used
          to indicate the file system type.

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

          The low-order bit of mflag 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.

          mount may be invoked only by the super-user.  It is intended
          for use only by the mount(1M) utility.

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

          [EPERM]        The effective user ID is not super-user.

          [ENOENT]       Any of the named files does not exist.

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

          [EREMOTE]      Spec is remote and cannot be mounted.

          [ENOLINK]      Path points to a remote machine and the link
                         to that machine is no longer active.

          [EMULTIHOP]    Components of path require hopping to
                         multiple remote machines.

          [ENOTBLK]      Spec is not a block special device.

          [ENXIO]        The device associated with spec does not



     Page 1                                        (last mod. 8/20/87)

     MOUNT(2)                                                 MOUNT(2)



                         exist.

          [ENOTDIR]      Dir is not a directory.

          [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.

          [EBUSY]        The device associated with spec is currently
                         mounted.

          [EBUSY]        There are no more mount table entries.

          [EROFS]        Spec is write protected and mflag requests
                         write permission.

          [ENOSPC]       The file system state in the super-block is
                         not FsOKAY and mflag requests write
                         permission.

          [EINVAL]       The super block has an invalid magic number
                         or the fstyp is invalid or mflag is not
                         valid.

     SEE ALSO
          sysfs(2), umount(2), fs(4).
          mount(1M) in the System Administrator's Reference Manual.

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

     ORIGIN
          AT&T V.3

















     Page 2                                        (last mod. 8/20/87)