SWAPON(2)SWAPON(2)NAMEswapon - add a swap device for interleaved paging/swapping
SYNOPSISswapon(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.
RETURN VALUE
If an error has occurred, a value of -1 is returned and errno is set to
indicate the error.
ERRORS
Swapon succeeds unless:
[ENOTDIR] A component of the path prefix is not a directory.
[EINVAL] The pathname contains a character with the high-order
bit set.
[ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an
entire path name exceeded 1023 characters.
[ENOENT] The named device does not exist.
[EACCES] Search permission is denied for a component of the path
prefix.
[ELOOP] Too many symbolic links were encountered in translating
the pathname.
[EPERM] The caller is not the super-user.
[ENOTBLK] Special is not a block device.
[EBUSY] The device specified by special has already been made
available for swapping
[EINVAL] The device configured by special was not configured into
the system as a swap device.
[ENXIO] The major device number of special is out of range (this
indicates no device driver exists for the associated
hardware).
[EIO] An I/O error occurred while opening the swap device.
[EFAULT] Special points outside the process's allocated address
space.
BUGS
There is no way to stop swapping on a disk so that the pack may be
dismounted.
This call will be upgraded in future versions of the system.
4th Berkeley Distribution March 9, 1986 SWAPON(2)