Home | History | Annotate | Line # | Download | only in stdlib
compat_putenv.c revision 1.3 
      1 /*	$NetBSD: compat_putenv.c,v 1.3 2015/01/20 18:31:24 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 #if defined(LIBC_SCCS) && !defined(lint)
     33 __RCSID("$NetBSD: compat_putenv.c,v 1.3 2015/01/20 18:31:24 christos Exp $");
     34 #endif /* LIBC_SCCS and not lint */
     35 
     36 #define __LIBC12_SOURCE__
     37 #include "namespace.h"
     38 
     39 #include <assert.h>
     40 #include <errno.h>
     41 #include <stdlib.h>
     42 #include <string.h>
     43 #include <compat/include/stdlib.h>
     44 
     45 #include "env.h"
     46 #include "local.h"
     47 
     48 #ifdef __weak_alias
     49 __weak_alias(putenv,_putenv)
     50 #endif
     51 
     52 __warn_references(putenv,
     53     "warning: reference to compatibility putenv();"
     54     " include <stdlib.h> for correct reference")
     55 
     56 /*
     57  * putenv(name) --
     58  *	This version implicitly copies the string for compatibility.
     59  */
     60 int
     61 putenv(char *name)
     62 {
     63 	size_t l_name;
     64 	char *copy;
     65 	int rv;
     66 
     67 	_DIAGASSERT(name != NULL);
     68 
     69         l_name = __envvarnamelen(name, true);
     70         if (l_name == 0) {
     71                 errno = EINVAL;
     72                 return -1;
     73         }
     74 
     75 	if ((copy = strdup(name)) == NULL)
     76 		return -1;
     77 	copy[l_name++] = '\0';
     78 
     79 	rv = setenv(copy, copy + l_name, 1);
     80 
     81 	free(copy);
     82 	return rv;
     83 }
     84