1/*
2 * Automated Testing Framework (atf)
3 *
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#include <ctype.h>
31#include <stdbool.h>
32#include <stdlib.h>
33#include <string.h>
34
35#include "atf-c/config.h"
36
37#include "detail/env.h"
38#include "detail/sanity.h"
39
40static bool initialized = false;
41
42static struct var {
43    const char *name;
44    const char *default_value;
45    const char *value;
46    bool can_be_empty;
47} vars[] = {
48    { "atf_build_cc",       ATF_BUILD_CC,       NULL, false, },
49    { "atf_build_cflags",   ATF_BUILD_CFLAGS,   NULL, true,  },
50    { "atf_build_cpp",      ATF_BUILD_CPP,      NULL, false, },
51    { "atf_build_cppflags", ATF_BUILD_CPPFLAGS, NULL, true,  },
52    { "atf_build_cxx",      ATF_BUILD_CXX,      NULL, false, },
53    { "atf_build_cxxflags", ATF_BUILD_CXXFLAGS, NULL, true,  },
54    { "atf_includedir",     ATF_INCLUDEDIR,     NULL, false, },
55    { "atf_libexecdir",     ATF_LIBEXECDIR,     NULL, false, },
56    { "atf_pkgdatadir",     ATF_PKGDATADIR,     NULL, false, },
57    { "atf_shell",          ATF_SHELL,          NULL, false, },
58    { "atf_workdir",        ATF_WORKDIR,        NULL, false, },
59    { NULL,                 NULL,               NULL, false, },
60};
61
62/* Only used for unit testing, so this prototype is private. */
63void __atf_config_reinit(void);
64
65/* ---------------------------------------------------------------------
66 * Auxiliary functions.
67 * --------------------------------------------------------------------- */
68
69static
70char *
71string_to_upper(const char *str)
72{
73    char *uc;
74
75    uc = (char *)malloc(strlen(str) + 1);
76    if (uc != NULL) {
77        char *ucptr = uc;
78        while (*str != '\0') {
79            *ucptr = toupper((int)*str);
80
81            str++;
82            ucptr++;
83        }
84        *ucptr = '\0';
85    }
86
87    return uc;
88}
89
90static
91void
92initialize_var(struct var *var, const char *envname)
93{
94    PRE(var->value == NULL);
95
96    if (atf_env_has(envname)) {
97        const char *val = atf_env_get(envname);
98        if (strlen(val) > 0 || var->can_be_empty)
99            var->value = val;
100        else
101            var->value = var->default_value;
102    } else
103        var->value = var->default_value;
104
105    POST(var->value != NULL);
106}
107
108static
109void
110initialize(void)
111{
112    struct var *var;
113
114    PRE(!initialized);
115
116    for (var = vars; var->name != NULL; var++) {
117        char *envname;
118
119        envname = string_to_upper(var->name);
120        initialize_var(var, envname);
121        free(envname);
122    }
123
124    initialized = true;
125}
126
127/* ---------------------------------------------------------------------
128 * Free functions.
129 * --------------------------------------------------------------------- */
130
131const char *
132atf_config_get(const char *name)
133{
134    const struct var *var;
135    const char *value;
136
137    if (!initialized) {
138        initialize();
139        INV(initialized);
140    }
141
142    value = NULL;
143    for (var = vars; value == NULL && var->name != NULL; var++)
144        if (strcmp(var->name, name) == 0)
145            value = var->value;
146    INV(value != NULL);
147
148    return value;
149}
150
151void
152__atf_config_reinit(void)
153{
154    struct var *var;
155
156    initialized = false;
157
158    for (var = vars; var->name != NULL; var++)
159        var->value = NULL;
160}
161