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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 static char sccsid[] = "@(#)putenv.c    8.2 (Berkeley) 3/27/94";
  32 #endif /* LIBC_SCCS and not lint */
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD: src/lib/libc/stdlib/putenv.c,v 1.6 2007/05/01 16:02:41 ache Exp $");
  35
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <sys/types.h>
  39 #include <db.h>
  40 #include <crt_externs.h>
  41 #include <malloc/malloc.h>
  42 #include <errno.h>
  43
  44 extern malloc_zone_t *__zone0;
  45 #ifdef LEGACY_CRT1_ENVIRON
  46 extern char **_saved_environ;
  47 #endif /* LEGACY_CRT1_ENVIRON */
  48
  49 extern void __malloc_check_env_name(const char *);
  50 __private_extern__ int __setenv(const char *, const char *, int, int, char ***, malloc_zone_t *);
  51
  52 #ifndef BUILDING_VARIANT
  53 /*
  54  * _putenvp -- SPI using an arbitrary pointer to string array (the array must
  55  * have been created with malloc) and an env state, created by _allocenvstate().
  56  *      Returns ptr to value associated with name, if any, else NULL.
  57  */
  58 int
  59 _putenvp(char *str, char ***envp, void *state)
  60 {
  61         /* insure __zone0 is set up */
  62         if (!__zone0) {
  63             __zone0 = malloc_create_zone(0, 0);
  64             if (!__zone0) {
  65                     errno = ENOMEM;
  66                     return (-1);
  67             }
  68         }
  69         return (__setenv(str, NULL, 1, 0, envp, (state ? (malloc_zone_t *)state : __zone0)));
  70 }
  71 #endif /* BUILDING_VARIANT */
  72
  73 int
  74 putenv(str)
  75         char *str;
  76 {
  77 #ifdef LEGACY_CRT1_ENVIRON
  78         int ret;
  79 #endif /* LEGACY_CRT1_ENVIRON */
  80
  81 #if __DARWIN_UNIX03
  82         if (str == NULL || *str == 0 || index(str, '=') == NULL) {
  83                 errno = EINVAL;
  84                 return (-1);
  85         }
  86 #else /* !__DARWIN_UNIX03 */
  87         if (index(str, '=') == NULL)
  88                 return (-1);
  89 #endif /* __DARWIN_UNIX03 */
  90         /* insure __zone0 is set up before calling __malloc_check_env_name */
  91         if (!__zone0) {
  92             __zone0 = malloc_create_zone(0, 0);
  93             if (!__zone0) {
  94                     errno = ENOMEM;
  95                     return (-1);
  96             }
  97         }
  98         __malloc_check_env_name(str); /* see if we are changing a malloc environment variable */
  99 #ifdef LEGACY_CRT1_ENVIRON
 100         ret =
 101 #else /* !LEGACY_CRT1_ENVIRON */
 102         return
 103 #endif /* !LEGACY_CRT1_ENVIRON */
 104             __setenv(str, NULL, 1,
 105 #if __DARWIN_UNIX03
 106                 0,
 107 #else /* !__DARWIN_UNIX03 */
 108                 -1,
 109 #endif /* __DARWIN_UNIX03 */
 110                 _NSGetEnviron(), __zone0);
 111 #ifdef LEGACY_CRT1_ENVIRON
 112         _saved_environ = *_NSGetEnviron();
 113         return ret;
 114 #endif /* LEGACY_CRT1_ENVIRON */
 115 }