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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 31 32 #include <limits.h> 33 #include <string.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include <errno.h> 37 #include <locale.h> 38 #include <libintl.h> 39 #include <pkglib.h> 40 #include <libadm.h> 41 42 #define ERR_MEMORY "memory allocation failure, errno=%d" 43 44 /* 45 * using factor of eight limits maximum 46 * memory fragmentation to 12.5% 47 */ 48 #define MEMSIZ PATH_MAX*8 49 #define NULL 0 50 51 struct dup { 52 char mem[MEMSIZ]; 53 struct dup *next; 54 }; 55 56 static struct dup *head, *tail, *new; 57 58 static int size, initialized; 59 static void pathinit(); 60 static void growstore(); 61 62 /* 63 * These functions allocate space for all the path names required 64 * in the packaging code. They are all allocated here so as to reduce 65 * memory fragmentation. 66 */ 67 68 /* Initialize storage area. */ 69 static void 70 pathinit() 71 { 72 if (head == NULL) 73 size = (-1); 74 else { 75 /* free all memory used except initial structure */ 76 tail = head->next; 77 while (tail) { 78 new = tail->next; 79 free(tail); 80 tail = new; 81 } 82 tail = head; 83 size = MEMSIZ; 84 } 85 86 initialized = 1; 87 } 88 89 /* Allocate additional space for storage area. */ 90 static void 91 growstore() 92 { 93 /* need more memory */ 94 new = calloc(1, sizeof (struct dup)); 95 if (new == NULL) { 96 progerr(gettext(ERR_MEMORY), errno); 97 quit(99); 98 } 99 if (head == NULL) 100 head = new; 101 else 102 tail->next = new; 103 tail = new; 104 size = MEMSIZ; 105 } 106 107 /* Allocate and return a pointer. If n == 0, initialize. */ 108 char * 109 pathalloc(int n) 110 { 111 char *pt; 112 113 if (n <= 0) { 114 pathinit(); 115 pt = NULL; 116 } else { 117 if (!initialized) 118 pathinit(); 119 120 n++; /* Account for terminating null. */ 121 122 if (size < n) 123 growstore(); 124 125 pt = &tail->mem[MEMSIZ-size]; 126 size -= n; 127 } 128 129 return (pt); 130 } 131 132 /* Allocate and insert a pathname returning a pointer to the new string. */ 133 char * 134 pathdup(char *s) 135 { 136 char *pt; 137 int n; 138 139 if (s == NULL) { 140 pathinit(); 141 pt = NULL; 142 } else { 143 if (!initialized) 144 pathinit(); 145 146 n = strlen(s) + 1; /* string + null terminator */ 147 148 if (size < n) 149 growstore(); 150 151 pt = &tail->mem[MEMSIZ-size]; 152 size -= n; 153 154 (void) strcpy(pt, s); 155 } 156 157 return (pt); 158 } 159