swapctl.2 (2010 09)

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swapctl(2) swapctl(2)

[EIO] Unable to read or write to the kernel registry services (see krs(5)).

[EFAULT] Speciﬁes that the structure pointed to by the arg parameter or swt_ent ﬁeld of

swaptable_t struct, or one of the ﬁelds sr_name or ste_path is outside the allo-

cated address space.

[EINVAL] Invalid input parameter passed in.

[EINVAL] Indicates that the LVM device passed in for

SC_ADD is not early boot accessible or

is a non-contiguous logical volume

[EINVAL] The path used with the

SC_REMOVE command is not a swap resource.

[EINVAL] The range indicated by the sr_start and sr_length ﬁelds for the

SC_ADD command

is outside the resource speciﬁed.

[ELOOP] Indicates that the pathname used with the

SC_ADD or SC_REMOVE commands has

too many symbolic links to correctly translate the pathname.

[ENAMETOOLONG]

Indicates that the length or path used with the

SC_ADD or SC_REMOVE command

exceeds the maximum allowed with

{_POSIX_NO_TRUNC}

in effect.

[ENOENT] Indicates that a invalid pathname was speciﬁed with either the

SC_ADD or

SC_REMOVE commands.

[ENOENT] Indicates that the primary swap was not set using the

SC_ADD command when

using with the SC_LIST command to list primary swap.

[ENOTBLK] Indicates that the path used with the

SC_ADD command for adding device swap is

not a block device ﬁle.

[ENOTDIR] Indicates that the path used with the

SC_ADD command for adding ﬁle system

swap is not a directory.

[ENXIO] The device associated with sr_name could not be opened.

[EPERM] Indicates that insufﬁcient privileges do not exist for the operation.

[EROFS] Indicates that a read-only ﬁle system was speciﬁed by the path for the

SC_ADD

command.

EXAMPLES

The following example adds, lists and removes a primary swap device for next boot:

#include <sys/swap.h>

#include <stdio.h>

int main() {

int rv;

swapres_t swp;

swaptable_t swt;

swapent_t swent;

char path[1024] = "/dev/disk/disk12 ";

char ret_path[1024];

bzero(ret_path, 1024);

/* add a new primary swap for next boot */

swp.sr_flag = SW_PRIMARY | SW_NEXTBOOT;

swp.sr_name = path;

swp.sr_start = 0;

swp.sr_length = 0; /* 0 len implies, use the entire dev */

swp.sr_priority = 1;

rv = swapctl(SC_ADD, (void *)&swp);

if (rv) {

perror("swapctl/SC_ADD failed");

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