UMOUNT(S)                XENIX System V                 UMOUNT(S)



     Name
          umount - Unmounts a file system.

     Syntax
          int umount (spec)
          char *spec;

     Description
          umount requests that a previously mounted file system
          contained on the block special device identified by spec be
          unmounted.  spec is a pointer to a pathname.  After
          unmounting the file system, the directory upon which the
          file system was mounted reverts to its ordinary
          interpretation.

          umount may be invoked only by the super-user.

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

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

               spec does not exist.  [ENXIO]

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

               The named file does not exist.  [ENOENT]

               spec is not a block special device.  [ENOTBLK]

               spec is not mounted.  [EINVAL]

               A file on spec is busy.  [EBUSY]

               spec points outside the process' allocated address
               space.  [EFAULT]

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

     See Also
          mount(C), mount(S)










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