1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1998 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/param.h> 30 #include <string.h> 31 #include <stdlib.h> 32 #include <stdio.h> 33 34 #include "utils.h" 35 #include "swap.h" 36 37 swaptbl_t * 38 swap_list(void) 39 { 40 swaptbl_t *swt; 41 42 int n, i; 43 char *p; 44 45 if ((n = swapctl(SC_GETNSWP, NULL)) == -1) { 46 warn(gettext("failed to get swap table size")); 47 return (NULL); 48 } 49 50 swt = malloc(sizeof (int) + n * sizeof (swapent_t) + n * MAXPATHLEN); 51 52 if (swt == NULL) { 53 warn(gettext("failed to allocate swap table")); 54 return (NULL); 55 } 56 57 swt->swt_n = n; 58 p = (char *)swt + (sizeof (int) + n * sizeof (swapent_t)); 59 60 for (i = 0; i < n; i++) { 61 swt->swt_ent[i].ste_path = p; 62 p += MAXPATHLEN; 63 } 64 65 if ((n = swapctl(SC_LIST, swt)) == -1) { 66 warn(gettext("failed to get swap table")); 67 free(swt); 68 return (NULL); 69 } 70 71 swt->swt_n = n; /* Number of entries filled in */ 72 n = 0; /* Number of valid entries */ 73 74 /* 75 * Shrink the array of swapent_t structures by stripping out 76 * all those which are ST_INDEL or ST_DOINGDEL. 77 */ 78 for (i = 0; i < swt->swt_n; i++) { 79 if (!(swt->swt_ent[i].ste_flags & (ST_INDEL | ST_DOINGDEL))) { 80 /* 81 * If i is ahead of the valid count (n), copy the 82 * ith entry back to the nth entry so valid entries 83 * fill the initial part of swt_ent[]. 84 */ 85 if (i > n) { 86 (void) memcpy(&swt->swt_ent[n], 87 &swt->swt_ent[i], sizeof (swapent_t)); 88 } 89 90 /* 91 * If the pathname isn't absolute, assume it begins 92 * with /dev as swap(1m) does. 93 */ 94 if (swt->swt_ent[n].ste_path[0] != '/') { 95 char buf[MAXPATHLEN]; 96 97 (void) snprintf(buf, sizeof (buf), "/dev/%s", 98 swt->swt_ent[n].ste_path); 99 (void) strcpy(swt->swt_ent[n].ste_path, buf); 100 } 101 102 n++; 103 } 104 } 105 106 swt->swt_n = n; /* Update swt_n with number of valid entries */ 107 return (swt); 108 } 109