external/bsd/bind/dist/unit/atf-src/atf-c/detail/env.c

   1 /*      $NetBSD: env.c,v 1.3 2014/12/10 04:38:03 christos Exp $ */
   2
   3 /*
   4  * Automated Testing Framework (atf)
   5  *
   6  * Copyright (c) 2007 The NetBSD Foundation, Inc.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  19  * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  20  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  25  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  27  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  29  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #if defined(HAVE_CONFIG_H)
  33 #include "bconfig.h"
  34 #endif
  35
  36 #include <errno.h>
  37 #include <stdlib.h>
  38
  39 #include "atf-c/error.h"
  40
  41 #include "env.h"
  42 #include "sanity.h"
  43 #include "text.h"
  44
  45 const char *
  46 atf_env_get(const char *name)
  47 {
  48     const char* val = getenv(name);
  49     PRE(val != NULL);
  50     return val;
  51 }
  52
  53 bool
  54 atf_env_has(const char *name)
  55 {
  56     return getenv(name) != NULL;
  57 }
  58
  59 atf_error_t
  60 atf_env_set(const char *name, const char *val)
  61 {
  62     atf_error_t err;
  63
  64 #if defined(HAVE_SETENV)
  65     if (setenv(name, val, 1) == -1)
  66         err = atf_libc_error(errno, "Cannot set environment variable "
  67                              "'%s' to '%s'", name, val);
  68     else
  69         err = atf_no_error();
  70 #elif defined(HAVE_PUTENV)
  71     char *buf;
  72
  73     err = atf_text_format(&buf, "%s=%s", name, val);
  74     if (!atf_is_error(err)) {
  75         if (putenv(buf) == -1)
  76             err = atf_libc_error(errno, "Cannot set environment variable "
  77                                  "'%s' to '%s'", name, val);
  78         free(buf);
  79     }
  80 #else
  81 #   error "Don't know how to set an environment variable."
  82 #endif
  83
  84     return err;
  85 }
  86
  87 atf_error_t
  88 atf_env_unset(const char *name)
  89 {
  90     atf_error_t err;
  91
  92 #if defined(HAVE_UNSETENV)
  93     unsetenv(name);
  94     err = atf_no_error();
  95 #elif defined(HAVE_PUTENV)
  96     char *buf;
  97
  98     err = atf_text_format(&buf, "%s=", name);
  99     if (!atf_is_error(err)) {
 100         if (putenv(buf) == -1)
 101             err = atf_libc_error(errno, "Cannot unset environment variable"
 102                                  " '%s'", name);
 103         free(buf);
 104     }
 105 #else
 106 #   error "Don't know how to unset an environment variable."
 107 #endif
 108
 109     return err;
 110 }