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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <locale.h>
#include <libintl.h>
#include <pkglib.h>
#include <libadm.h>
#define ERR_MEMORY "memory allocation failure, errno=%d"
/*
* using factor of eight limits maximum
* memory fragmentation to 12.5%
*/
#define MEMSIZ PATH_MAX*8
struct dup {
char mem[MEMSIZ];
struct dup *next;
};
static struct dup *head, *tail, *new;
static int size, initialized;
static void pathinit();
static void growstore();
/*
* These functions allocate space for all the path names required
* in the packaging code. They are all allocated here so as to reduce
* memory fragmentation.
*/
/* Initialize storage area. */
static void
pathinit()
{
if (head == NULL)
size = (-1);
else {
/* free all memory used except initial structure */
tail = head->next;
while (tail) {
new = tail->next;
free(tail);
tail = new;
}
tail = head;
size = MEMSIZ;
}
initialized = 1;
}
/* Allocate additional space for storage area. */
static void
growstore()
{
/* need more memory */
new = calloc(1, sizeof (struct dup));
if (new == NULL) {
progerr(gettext(ERR_MEMORY), errno);
quit(99);
}
if (head == NULL)
head = new;
else
tail->next = new;
tail = new;
size = MEMSIZ;
}
/* Allocate and return a pointer. If n == 0, initialize. */
char *
pathalloc(int n)
{
char *pt;
if (n <= 0) {
pathinit();
pt = NULL;
} else {
if (!initialized)
pathinit();
n++; /* Account for terminating null. */
if (size < n)
growstore();
pt = &tail->mem[MEMSIZ-size];
size -= n;
}
return (pt);
}
/* Allocate and insert a pathname returning a pointer to the new string. */
char *
pathdup(char *s)
{
char *pt;
int n;
if (s == NULL) {
pathinit();
pt = NULL;
} else {
if (!initialized)
pathinit();
n = strlen(s) + 1; /* string + null terminator */
if (size < n)
growstore();
pt = &tail->mem[MEMSIZ-size];
size -= n;
(void) strcpy(pt, s);
}
return (pt);
}
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