stdlib/putenv-fbsd.c

   1 /*-
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)putenv.c    8.2 (Berkeley) 3/27/94";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/stdlib/putenv.c,v 1.2 2002/03/22 21:53:10 obrien Exp $");
  39
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <sys/types.h>
  43 #include <db.h>
  44 #include <crt_externs.h>
  45 #include <malloc/malloc.h>
  46 #include <errno.h>
  47
  48 extern malloc_zone_t *__zone0;
  49 extern void __malloc_check_env_name(const char *);
  50
  51 __private_extern__ int __setenv(const char *, const char *, int, int, char ***, malloc_zone_t *);
  52
  53 #ifndef BUILDING_VARIANT
  54 /*
  55  * _putenvp -- SPI using an arbitrary pointer to string array (the array must
  56  * have been created with malloc) and an env state, created by _allocenvstate().
  57  *      Returns ptr to value associated with name, if any, else NULL.
  58  */
  59 int
  60 _putenvp(char *str, char ***envp, void *state)
  61 {
  62         /* insure __zone0 is set up */
  63         if (!__zone0) {
  64             __zone0 = malloc_create_zone(0, 0);
  65             if (!__zone0) {
  66                     errno = ENOMEM;
  67                     return (-1);
  68             }
  69         }
  70         return (__setenv(str, NULL, 1, 0, envp, (state ? (malloc_zone_t *)state : __zone0)));
  71 }
  72 #endif /* BUILDING_VARIANT */
  73
  74 int
  75 putenv(str)
  76         char *str;
  77 {
  78 #if __DARWIN_UNIX03
  79         if (str == NULL || *str == 0 || index(str, '=') == NULL) {
  80                 errno = EINVAL;
  81                 return (-1);
  82         }
  83 #else /* !__DARWIN_UNIX03 */
  84         if (index(str, '=') == NULL)
  85                 return (-1);
  86 #endif /* __DARWIN_UNIX03 */
  87         /* insure __zone0 is set up before calling __malloc_check_env_name */
  88         if (!__zone0) {
  89             __zone0 = malloc_create_zone(0, 0);
  90             if (!__zone0) {
  91                     errno = ENOMEM;
  92                     return (-1);
  93             }
  94         }
  95         __malloc_check_env_name(str); /* see if we are changing a malloc environment variable */
  96         return (__setenv(str, NULL, 1,
  97 #if __DARWIN_UNIX03
  98                 0,
  99 #else /* !__DARWIN_UNIX03 */
 100                 -1,
 101 #endif /* __DARWIN_UNIX03 */
 102         _NSGetEnviron(), __zone0));
 103 }