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 50 struct dup { 51 char mem[MEMSIZ]; 52 struct dup *next; 53 }; 54 55 static struct dup *head, *tail, *new; 56 57 static int size, initialized; 58 static void pathinit(); 59 static void growstore(); 60 61 /* 62 * These functions allocate space for all the path names required 63 * in the packaging code. They are all allocated here so as to reduce 64 * memory fragmentation. 65 */ 66 67 /* Initialize storage area. */ 68 static void 69 pathinit() 70 { 71 if (head == NULL) 72 size = (-1); 73 else { 74 /* free all memory used except initial structure */ 75 tail = head->next; 76 while (tail) { 77 new = tail->next; 78 free(tail); 79 tail = new; 80 } 81 tail = head; 82 size = MEMSIZ; 83 } 84 85 initialized = 1; 86 } 87 88 /* Allocate additional space for storage area. */ 89 static void 90 growstore() 91 { 92 /* need more memory */ 93 new = calloc(1, sizeof (struct dup)); 94 if (new == NULL) { 95 progerr(gettext(ERR_MEMORY), errno); 96 quit(99); 97 } 98 if (head == NULL) 99 head = new; 100 else 101 tail->next = new; 102 tail = new; 103 size = MEMSIZ; 104 } 105 106 /* Allocate and return a pointer. If n == 0, initialize. */ 107 char * 108 pathalloc(int n) 109 { 110 char *pt; 111 112 if (n <= 0) { 113 pathinit(); 114 pt = NULL; 115 } else { 116 if (!initialized) 117 pathinit(); 118 119 n++; /* Account for terminating null. */ 120 121 if (size < n) 122 growstore(); 123 124 pt = &tail->mem[MEMSIZ-size]; 125 size -= n; 126 } 127 128 return (pt); 129 } 130 131 /* Allocate and insert a pathname returning a pointer to the new string. */ 132 char * 133 pathdup(char *s) 134 { 135 char *pt; 136 int n; 137 138 if (s == NULL) { 139 pathinit(); 140 pt = NULL; 141 } else { 142 if (!initialized) 143 pathinit(); 144 145 n = strlen(s) + 1; /* string + null terminator */ 146 147 if (size < n) 148 growstore(); 149 150 pt = &tail->mem[MEMSIZ-size]; 151 size -= n; 152 153 (void) strcpy(pt, s); 154 } 155 156 return (pt); 157 } 158