/*
- * Copyright (c) 1999-2002 Todd C. Miller <Todd.Miller@courtesan.com>
- * All rights reserved.
+ * Copyright (c) 1999-2005 Todd C. Miller <Todd.Miller@courtesan.com>
*
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ * 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.
*
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
+ * 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.
*
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * 4. Products derived from this software may not be called "Sudo" nor
- * may "Sudo" appear in their names without specific prior written
- * permission from the author.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
- * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 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 <config.h>
#include <sys/types.h>
#include <sys/param.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 */
+#ifdef HAVE_INTTYPES_H
+# include <inttypes.h>
+#endif
#include "sudo.h"
#ifndef lint
-static const char rcsid[] = "$Sudo: alloc.c,v 1.11 2002/01/09 16:56:04 millert Exp $";
+__unused static const char rcsid[] = "$Sudo: alloc.c,v 1.23.2.4 2007/09/11 12:20:15 millert Exp $";
#endif /* lint */
-extern char **Argv; /* from sudo.c */
+/*
+ * 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
{
VOID *ptr;
- if ((ptr = (VOID *) malloc(size)) == NULL) {
- (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
- exit(1);
- }
+ 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);
}
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) {
- (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
- exit(1);
- }
+ 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);
}
const char *src;
{
char *dst = NULL;
+ size_t size;
if (src != NULL) {
- dst = (char *) emalloc(strlen(src) + 1);
- (void) strcpy(dst, src);
+ size = strlen(src) + 1;
+ dst = (char *) emalloc(size);
+ (void) memcpy(dst, src, size);
}
return(dst);
}
#ifdef __STDC__
easprintf(char **ret, const char *fmt, ...)
#else
-easprintf(va_alist)
+easprintf(ret, fmt, va_alist)
+ char **ret;
+ const char *fmt;
va_dcl
#endif
{
#ifdef __STDC__
va_start(ap, fmt);
#else
- char **ret;
- const char *fmt;
-
va_start(ap);
- ret = va_arg(ap, char **);
- fmt = va_arg(ap, const char *);
#endif
len = vasprintf(ret, fmt, ap);
va_end(ap);
- if (len == -1) {
- (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
- exit(1);
- }
+ if (len == -1)
+ errx(1, "unable to allocate memory");
return(len);
}
{
int len;
- if ((len = vasprintf(ret, format, args)) == -1) {
- (void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
- exit(1);
- }
+ 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);
+}
projects / debian / sudo / blobdiff