[3958] | 1 | //env.c: |
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| 2 | |
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| 3 | /* |
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[5961] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2014 |
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[3958] | 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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[3964] | 38 | int roar_env_set(struct roar_keyval * keyval) { |
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[5752] | 39 | #if defined(ROAR_HAVE_PUTENV) && !defined(ROAR_HAVE_SETENV) |
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| 40 | size_t len; |
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| 41 | char * str; |
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| 42 | #endif |
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| 43 | |
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| 44 | if ( keyval == NULL || keyval->key == NULL ) { |
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| 45 | roar_err_set(ROAR_ERROR_FAULT); |
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| 46 | return -1; |
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| 47 | } |
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| 48 | |
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[3964] | 49 | #ifdef ROAR_HAVE_SETENV |
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| 50 | return setenv(keyval->key, keyval->value, 1); |
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[3965] | 51 | #elif defined(ROAR_HAVE_PUTENV) |
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[4937] | 52 | len = strlen(keyval->key) + strlen(keyval->value) + 2; |
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[4917] | 53 | |
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[3964] | 54 | // TODO: does this leak memory? |
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[4917] | 55 | if ( (str = malloc(len)) == NULL ) { |
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[3964] | 56 | return -1; |
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| 57 | } |
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| 58 | |
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[4917] | 59 | snprintf(str, len, "%s=%s", keyval->key, keyval->value); |
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[3964] | 60 | |
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| 61 | return putenv(str) == 0 ? 0 : -1; |
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[3965] | 62 | #else |
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[5752] | 63 | roar_strap(ROAR_TRAP_GROUP_LIBROAR, "env_set.not-implemented"); |
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| 64 | roar_err_set(ROAR_ERROR_NOSYS); |
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[3965] | 65 | return -1; |
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[3964] | 66 | #endif |
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| 67 | } |
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[3958] | 68 | |
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[5752] | 69 | const char * roar_env_get(const char * key) { |
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| 70 | const char * ret; |
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| 71 | |
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| 72 | if ( key == NULL ) { |
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| 73 | roar_err_set(ROAR_ERROR_FAULT); |
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| 74 | return NULL; |
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| 75 | } |
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| 76 | |
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| 77 | roar_err_clear_all(); |
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| 78 | ret = getenv(key); |
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| 79 | roar_err_update(); |
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| 80 | |
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| 81 | if ( ret == NULL && roar_error == ROAR_ERROR_NONE ) |
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| 82 | roar_err_set(ROAR_ERROR_NOENT); |
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| 83 | |
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| 84 | return ret; |
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| 85 | } |
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| 86 | |
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[3958] | 87 | const char * roar_env_get_home(int level) { |
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[5754] | 88 | const char * home = roar_env_get("HOME"); |
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[3958] | 89 | |
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[5270] | 90 | (void)level; |
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| 91 | |
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[3958] | 92 | return home; |
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| 93 | } |
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| 94 | |
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| 95 | int roar_env_get_home_r(int level, char * str, size_t len) { |
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| 96 | size_t homelen; |
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| 97 | const char * home; |
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| 98 | |
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| 99 | if ( len == 0 ) |
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| 100 | return 0; |
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| 101 | |
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| 102 | if ( str == NULL ) |
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| 103 | return -1; |
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| 104 | |
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| 105 | *str = 0; // write a single termination byte to be safe... |
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| 106 | |
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| 107 | home = roar_env_get_home(level); |
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| 108 | |
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| 109 | if ( home == NULL ) |
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| 110 | return -1; |
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| 111 | |
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| 112 | homelen = strlen(home); |
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| 113 | |
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| 114 | if ( (len - 1) < homelen ) |
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| 115 | return -1; |
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| 116 | |
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| 117 | strncpy(str, home, len); |
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| 118 | str[homelen] = 0; |
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| 119 | |
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| 120 | return 0; |
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| 121 | } |
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| 122 | |
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[5811] | 123 | static char * __get_path(const char ** inpath) { |
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| 124 | char buf_path[64]; |
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| 125 | size_t i; |
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| 126 | |
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| 127 | (*inpath)++; |
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| 128 | |
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| 129 | for (i = 0; i < sizeof(buf_path); i++) { |
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| 130 | if ( (*inpath)[i] == '/' || (*inpath)[i] == 0 ) { |
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| 131 | break; |
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| 132 | } else { |
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| 133 | buf_path[i] = (*inpath)[i]; |
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| 134 | } |
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| 135 | } |
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| 136 | |
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| 137 | if ( i == sizeof(buf_path) ) { |
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| 138 | roar_err_set(ROAR_ERROR_NOSPC); |
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| 139 | return NULL; |
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| 140 | } |
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| 141 | |
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| 142 | buf_path[i] = 0; |
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| 143 | |
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| 144 | (*inpath) += i; |
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| 145 | |
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| 146 | return roar_libroar_get_path(buf_path, 0, NULL, NULL); |
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| 147 | } |
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| 148 | |
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[3958] | 149 | int roar_env_render_path_r(char * out, size_t len, const char * inpath) { |
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| 150 | size_t inlen; |
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| 151 | size_t needlen = 0; |
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| 152 | size_t homelen = 0; |
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| 153 | const char * home; |
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[5811] | 154 | const char * prefix = NULL; |
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| 155 | char * prefix_path = NULL; |
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| 156 | enum { UNKNOWN, COPY, HOME, PREFIX } mode = UNKNOWN; |
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[3958] | 157 | |
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| 158 | if ( len == 0 && inpath == NULL ) |
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| 159 | return 0; |
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| 160 | |
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| 161 | if ( inpath == NULL ) |
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| 162 | return -1; |
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| 163 | |
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| 164 | inlen = strlen(inpath); |
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| 165 | |
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| 166 | if ( len == 0 && inlen == 0 ) |
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| 167 | return 0; |
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| 168 | |
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| 169 | if ( len == 0 ) |
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| 170 | return -1; |
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| 171 | |
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| 172 | if ( out == NULL ) |
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| 173 | return -1; |
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| 174 | |
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| 175 | home = roar_env_get_home(0); |
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| 176 | |
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| 177 | if ( home != NULL ) |
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| 178 | homelen = strlen(home); |
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| 179 | |
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| 180 | if ( inpath[0] == '/' ) { |
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| 181 | needlen = inlen; |
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| 182 | mode = COPY; |
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| 183 | } else if ( inpath[0] == '~' && inpath[1] == '/' ) { |
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| 184 | if ( homelen == 0 ) /* we don't know our $HOME */ |
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| 185 | return -1; |
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| 186 | |
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| 187 | needlen = inlen + homelen - 1; |
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| 188 | mode = HOME; |
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[5811] | 189 | prefix = home; |
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| 190 | inpath++; |
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| 191 | } else if ( inpath[0] == '$' ) { |
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| 192 | prefix_path = __get_path(&inpath); |
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| 193 | if ( prefix_path == NULL ) |
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| 194 | return -1; |
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| 195 | needlen = roar_mm_strlen(inpath) + roar_mm_strlen(prefix_path) + 1; |
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| 196 | mode = PREFIX; |
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| 197 | prefix = prefix_path; |
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[3958] | 198 | } |
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| 199 | |
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[5811] | 200 | if ( len < (needlen + 1) ) { |
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| 201 | if ( prefix_path != NULL ) |
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| 202 | roar_mm_free(prefix_path); |
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| 203 | roar_err_set(ROAR_ERROR_NOSPC); |
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[3958] | 204 | return -1; |
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[5811] | 205 | } |
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[3958] | 206 | |
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| 207 | switch (mode) { |
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| 208 | case COPY: |
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| 209 | strncpy(out, inpath, len); |
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| 210 | out[len-1] = 0; |
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| 211 | break; |
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| 212 | case HOME: |
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[5811] | 213 | case PREFIX: |
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| 214 | roar_mm_strlcpy(out, prefix, len); |
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| 215 | roar_mm_strlcat(out, inpath, len); // strip only ~, so we have the / if home is not /-terminated. |
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[3958] | 216 | break; |
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| 217 | default: |
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[5811] | 218 | if ( prefix_path != NULL ) |
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| 219 | roar_mm_free(prefix_path); |
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| 220 | roar_err_set(ROAR_ERROR_NOTSUP); |
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[3958] | 221 | return -1; |
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| 222 | break; |
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| 223 | } |
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| 224 | |
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[5811] | 225 | if ( prefix_path != NULL ) |
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| 226 | roar_mm_free(prefix_path); |
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[3958] | 227 | return 0; |
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| 228 | } |
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| 229 | |
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| 230 | //ll |
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