SWAPON(2)               COMMAND REFERENCE               SWAPON(2)



NAME
     swapon - add a swap device for interleaved paging/swapping

SYNOPSIS
     swapon(special)
     char *special;

DESCRIPTION
     Swapon makes the block device special available to the
     system for allocation for paging and swapping.  The names of
     potentially available devices are known to the system and
     defined at system configuration time.  The size of the swap
     area on special is calculated at the time the device is
     first made available for swapping.

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

     [ENOENT]
         Special does not exist.

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

     [ENAMETOOLONG]
         The argument special is too long.

     [EACCES]
         Search permission is denied on a component of the path
         prefix of special.

     [ENOASCII]
         The pathname special contains a character with the
         high-order bit set.

     [ELOOP]
         Too many symbolic links were encountered in translating
         the pathname.

     [EFAULT]
         special points to an invalid address.

     [EIO]
         An I/O error occurred while reading from or writing to
         the file system.

     [ENOTBLK]
         Special is not a block device.

     [ENXIO]
         The major device number of special is out of range (this



Printed 10/17/86                                                1

SWAPON(2)               COMMAND REFERENCE               SWAPON(2)



         indicates no device driver exists for the associated
         hardware).

     [EBUSY]
         Swapping is already being done on the device.

     [ENODEV]
         The device is not in the swap table.

     [EDFSREF]
         Special is a reference to a remote device and this
         system call does not support that capability.

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.

CAVEATS
     There is no way to stop swapping on a disk so that the pack
     may be dismounted.

SEE ALSO
     config(8), swapon(8).































Printed 10/17/86                                                2

%%index%%
na:72,94;
sy:166,267;
de:433,498;
di:931,1113;2188,358;
rv:2546,236;
ca:2782,140;
se:2922,134;
%%index%%000000000128