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32 .\" @(#)swapon.2 8.1 (Berkeley) 6/4/93
33 .\" $FreeBSD: src/lib/libc/sys/swapon.2,v 1.6.2.6 2001/12/14 18:34:01 ru Exp $
40 .Nd add a swap device for interleaved paging/swapping
46 .Fn swapon "const char *special"
49 makes the block device
51 available to the system for
52 allocation for paging and swapping. The names of potentially
53 available devices are known to the system and defined at system
54 configuration time. The size of the swap area on
56 is calculated at the time the device is first made available
59 If an error has occurred, a value of -1 is returned and
61 is set to indicate the error.
67 A component of the path prefix is not a directory.
68 .It Bq Er ENAMETOOLONG
69 A component of a pathname exceeded 255 characters,
70 or an entire path name exceeded 1023 characters.
72 The named device does not exist.
74 Search permission is denied for a component of the path prefix.
76 Too many symbolic links were encountered in translating the pathname.
78 The caller is not the super-user.
81 is not a block device.
83 The device specified by
86 been made available for swapping
88 The device configured by
91 configured into the system as a swap device.
93 The major device number of
95 is out of range (this indicates no device driver exists
96 for the associated hardware).
98 An I/O error occurred while opening the swap device.
101 points outside the process's allocated address space.
107 There is no way to stop swapping on a disk so that the pack may be
110 This call will be upgraded in future versions of the system.
114 function call appeared in