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/*
* Copyright (c) 1999-2005 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#if defined(HAVE_MALLOC_H) && !defined(STDC_HEADERS)
# include <malloc.h>
#endif /* HAVE_MALLOC_H && !STDC_HEADERS */
#ifdef HAVE_ERR_H
# include <err.h>
#else
# include "emul/err.h"
#endif /* HAVE_ERR_H */
#include "sudo.h"
#ifndef lint
__unused static const char rcsid[] = "$Sudo: alloc.c,v 1.23.2.3 2007/06/12 01:43:01 millert Exp $";
#endif /* lint */
/*
* If there is no SIZE_MAX or SIZE_T_MAX we have to assume that size_t
* could be signed (as it is on SunOS 4.x). This just means that
* emalloc2() and erealloc3() cannot allocate huge amounts on such a
* platform but that is OK since sudo doesn't need to do so anyway.
*/
#ifndef SIZE_MAX
# ifdef SIZE_T_MAX
# define SIZE_MAX SIZE_T_MAX
# else
# define SIZE_MAX INT_MAX
# endif /* SIZE_T_MAX */
#endif /* SIZE_MAX */
/*
* emalloc() calls the system malloc(3) and exits with an error if
* malloc(3) fails.
*/
VOID *
emalloc(size)
size_t size;
{
VOID *ptr;
if (size == 0)
errx(1, "internal error, tried to emalloc(0)");
if ((ptr = (VOID *) malloc(size)) == NULL)
errx(1, "unable to allocate memory");
return(ptr);
}
/*
* emalloc2() allocates nmemb * size bytes and exits with an error
* if overflow would occur or if the system malloc(3) fails.
*/
VOID *
emalloc2(nmemb, size)
size_t nmemb;
size_t size;
{
VOID *ptr;
if (nmemb == 0 || size == 0)
errx(1, "internal error, tried to emalloc2(0)");
if (nmemb > SIZE_MAX / size)
errx(1, "internal error, emalloc2() overflow");
size *= nmemb;
if ((ptr = (VOID *) malloc(size)) == NULL)
errx(1, "unable to allocate memory");
return(ptr);
}
/*
* erealloc() calls the system realloc(3) and exits with an error if
* realloc(3) fails. You can call erealloc() with a NULL pointer even
* if the system realloc(3) does not support this.
*/
VOID *
erealloc(ptr, size)
VOID *ptr;
size_t size;
{
if (size == 0)
errx(1, "internal error, tried to erealloc(0)");
ptr = ptr ? (VOID *) realloc(ptr, size) : (VOID *) malloc(size);
if (ptr == NULL)
errx(1, "unable to allocate memory");
return(ptr);
}
/*
* erealloc3() realloc(3)s nmemb * size bytes and exits with an error
* if overflow would occur or if the system malloc(3)/realloc(3) fails.
* You can call erealloc() with a NULL pointer even if the system realloc(3)
* does not support this.
*/
VOID *
erealloc3(ptr, nmemb, size)
VOID *ptr;
size_t nmemb;
size_t size;
{
if (nmemb == 0 || size == 0)
errx(1, "internal error, tried to erealloc3(0)");
if (nmemb > SIZE_MAX / size)
errx(1, "internal error, erealloc3() overflow");
size *= nmemb;
ptr = ptr ? (VOID *) realloc(ptr, size) : (VOID *) malloc(size);
if (ptr == NULL)
errx(1, "unable to allocate memory");
return(ptr);
}
/*
* estrdup() is like strdup(3) except that it exits with an error if
* malloc(3) fails. NOTE: unlike strdup(3), estrdup(NULL) is legal.
*/
char *
estrdup(src)
const char *src;
{
char *dst = NULL;
size_t size;
if (src != NULL) {
size = strlen(src) + 1;
dst = (char *) emalloc(size);
(void) memcpy(dst, src, size);
}
return(dst);
}
/*
* easprintf() calls vasprintf() and exits with an error if vasprintf()
* returns -1 (out of memory).
*/
int
#ifdef __STDC__
easprintf(char **ret, const char *fmt, ...)
#else
easprintf(ret, fmt, va_alist)
char **ret;
const char *fmt;
va_dcl
#endif
{
int len;
va_list ap;
#ifdef __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
len = vasprintf(ret, fmt, ap);
va_end(ap);
if (len == -1)
errx(1, "unable to allocate memory");
return(len);
}
/*
* evasprintf() calls vasprintf() and exits with an error if vasprintf()
* returns -1 (out of memory).
*/
int
evasprintf(ret, format, args)
char **ret;
const char *format;
va_list args;
{
int len;
if ((len = vasprintf(ret, format, args)) == -1)
errx(1, "unable to allocate memory");
return(len);
}
/*
* Wrapper for free(3) so we can depend on C89 semantics.
*/
void
efree(ptr)
VOID *ptr;
{
if (ptr != NULL)
free(ptr);
}
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