Move calloc() into malloc.c and only zero out the area if malloc()

didn't do so for us.  By default, malloc() zeros out the space it
allocates but the programmer cannot rely on this as it is implementation-
specific (and configurable via /etc/malloc.conf)

src/lib/libc/stdlib/Makefile.inc

@@ -3,7 +3,7 @@
 # stdlib sources
 .PATH: ${LIBCSRCDIR}/arch/${MACHINE_ARCH}/stdlib ${LIBCSRCDIR}/stdlib
 
-SRCS+=	a64l.c abort.c atexit.c atoi.c atof.c atol.c bsearch.c calloc.c \
+SRCS+=	a64l.c abort.c atexit.c atoi.c atof.c atol.c bsearch.c \
 	cfree.c exit.c getenv.c getopt.c getsubopt.c heapsort.c l64a.c \
 	malloc.c merge.c multibyte.c putenv.c qsort.c radixsort.c rand.c \
 	random.c realpath.c setenv.c strtod.c strtol.c strtoq.c strtoul.c \

src/lib/libc/stdlib/calloc.c

@@ -1,53 +0,0 @@
-/*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 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. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by the University of
- *	California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: calloc.c,v 1.3 1996/08/20 17:42:33 downsj Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-#include <stdlib.h>
-#include <string.h>
-
-void *
-calloc(num, size)
-	size_t num;
-	register size_t size;
-{
-	register void *p;
-
-	size *= num;
-	p = malloc(size);
-	if (p)
-		memset(p, '\0', size);
-	return(p);
-}

src/lib/libc/stdlib/malloc.c

@@ -8,7 +8,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: malloc.c,v 1.36 1999/09/16 19:06:06 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: malloc.c,v 1.37 1999/11/09 19:25:33 millert Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 /*
@@ -1278,3 +1278,27 @@ realloc(void *ptr, size_t size)
 	wrterror("out of memory.\n");
     return (r);
 }
+
+void *
+calloc(size_t num, size_t size)
+{
+    register void *r;
+
+    malloc_func = " in calloc():";
+    THREAD_LOCK();
+    if (malloc_active++) {
+	wrtwarning("recursive call.\n");
+        malloc_active--;
+	return (0);
+    }
+    size *= num;
+    r = imalloc(size);
+    if (r && !malloc_zero)
+	memset(r, 0, size)
+    UTRACE(0, size, r);
+    malloc_active--;
+    THREAD_UNLOCK();
+    if (malloc_xmalloc && !r)
+	wrterror("out of memory.\n");
+    return (r);
+}