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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#include <sys/param.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "utils.h"
#include "swap.h"
swaptbl_t *
swap_list(void)
{
swaptbl_t *swt;
int n, i;
char *p;
if ((n = swapctl(SC_GETNSWP, NULL)) == -1) {
warn(gettext("failed to get swap table size"));
return (NULL);
}
swt = malloc(sizeof (int) + n * sizeof (swapent_t) + n * MAXPATHLEN);
if (swt == NULL) {
warn(gettext("failed to allocate swap table"));
return (NULL);
}
swt->swt_n = n;
p = (char *)swt + (sizeof (int) + n * sizeof (swapent_t));
for (i = 0; i < n; i++) {
swt->swt_ent[i].ste_path = p;
p += MAXPATHLEN;
}
if ((n = swapctl(SC_LIST, swt)) == -1) {
warn(gettext("failed to get swap table"));
free(swt);
return (NULL);
}
swt->swt_n = n; /* Number of entries filled in */
n = 0; /* Number of valid entries */
/*
* Shrink the array of swapent_t structures by stripping out
* all those which are ST_INDEL or ST_DOINGDEL.
*/
for (i = 0; i < swt->swt_n; i++) {
if (!(swt->swt_ent[i].ste_flags & (ST_INDEL | ST_DOINGDEL))) {
/*
* If i is ahead of the valid count (n), copy the
* ith entry back to the nth entry so valid entries
* fill the initial part of swt_ent[].
*/
if (i > n) {
(void) memcpy(&swt->swt_ent[n],
&swt->swt_ent[i], sizeof (swapent_t));
}
/*
* If the pathname isn't absolute, assume it begins
* with /dev as swap(8) does.
*/
if (swt->swt_ent[n].ste_path[0] != '/') {
char buf[MAXPATHLEN];
(void) snprintf(buf, sizeof (buf), "/dev/%s",
swt->swt_ent[n].ste_path);
(void) strcpy(swt->swt_ent[n].ste_path, buf);
}
n++;
}
}
swt->swt_n = n; /* Update swt_n with number of valid entries */
return (swt);
}
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