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 #include <sys/param.h> 28 #include <string.h> 29 #include <stdlib.h> 30 #include <stdio.h> 31 32 #include "utils.h" 33 #include "swap.h" 34 35 swaptbl_t * 36 swap_list(void) 37 { 38 swaptbl_t *swt; 39 40 int n, i; 41 char *p; 42 43 if ((n = swapctl(SC_GETNSWP, NULL)) == -1) { 44 warn(gettext("failed to get swap table size")); 45 return (NULL); 46 } 47 48 swt = malloc(sizeof (int) + n * sizeof (swapent_t) + n * MAXPATHLEN); 49 50 if (swt == NULL) { 51 warn(gettext("failed to allocate swap table")); 52 return (NULL); 53 } 54 55 swt->swt_n = n; 56 p = (char *)swt + (sizeof (int) + n * sizeof (swapent_t)); 57 58 for (i = 0; i < n; i++) { 59 swt->swt_ent[i].ste_path = p; 60 p += MAXPATHLEN; 61 } 62 63 if ((n = swapctl(SC_LIST, swt)) == -1) { 64 warn(gettext("failed to get swap table")); 65 free(swt); 66 return (NULL); 67 } 68 69 swt->swt_n = n; /* Number of entries filled in */ 70 n = 0; /* Number of valid entries */ 71 72 /* 73 * Shrink the array of swapent_t structures by stripping out 74 * all those which are ST_INDEL or ST_DOINGDEL. 75 */ 76 for (i = 0; i < swt->swt_n; i++) { 77 if (!(swt->swt_ent[i].ste_flags & (ST_INDEL | ST_DOINGDEL))) { 78 /* 79 * If i is ahead of the valid count (n), copy the 80 * ith entry back to the nth entry so valid entries 81 * fill the initial part of swt_ent[]. 82 */ 83 if (i > n) { 84 (void) memcpy(&swt->swt_ent[n], 85 &swt->swt_ent[i], sizeof (swapent_t)); 86 } 87 88 /* 89 * If the pathname isn't absolute, assume it begins 90 * with /dev as swap(8) does. 91 */ 92 if (swt->swt_ent[n].ste_path[0] != '/') { 93 char buf[MAXPATHLEN]; 94 95 (void) snprintf(buf, sizeof (buf), "/dev/%s", 96 swt->swt_ent[n].ste_path); 97 (void) strcpy(swt->swt_ent[n].ste_path, buf); 98 } 99 100 n++; 101 } 102 } 103 104 swt->swt_n = n; /* Update swt_n with number of valid entries */ 105 return (swt); 106 } 107