| 1 | /* |
| 2 | * JzBoot: an USB bootloader for JZ series of Ingenic(R) microprocessors. |
| 3 | * Copyright (C) 2010 Sergey Gridassov <grindars@gmail.com> |
| 4 | * |
| 5 | * This program is free software: you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation, either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #include <string.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <string.h> |
| 22 | #include <stdio.h> |
| 23 | |
| 24 | #include "app_config.h" |
| 25 | #include "debug.h" |
| 26 | |
| 27 | char **cfg_environ = NULL; |
| 28 | |
| 29 | static int env_size() { |
| 30 | int size = 0; |
| 31 | |
| 32 | if(cfg_environ == NULL) |
| 33 | return 0; |
| 34 | |
| 35 | for(int i = 0; cfg_environ[i] != NULL; i++) |
| 36 | size++; |
| 37 | |
| 38 | return size; |
| 39 | } |
| 40 | |
| 41 | char *cfg_getenv(const char *variable) { |
| 42 | if(cfg_environ == NULL) |
| 43 | return NULL; |
| 44 | |
| 45 | size_t len = strlen(variable); |
| 46 | |
| 47 | for(int i = 0; cfg_environ[i] != NULL; i++) { |
| 48 | char *str = cfg_environ[i], *sep = strchr(str, '='); |
| 49 | |
| 50 | if(sep - str == len && memcmp(str, variable, len) == 0) { |
| 51 | return sep + 1; |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | return NULL; |
| 56 | } |
| 57 | |
| 58 | void cfg_unsetenv(const char *variable) { |
| 59 | int size = env_size(); |
| 60 | |
| 61 | if(size == 0) |
| 62 | return; |
| 63 | |
| 64 | size_t len = strlen(variable); |
| 65 | |
| 66 | for(int i = 0; cfg_environ[i] != NULL; i++) { |
| 67 | char *str = cfg_environ[i], *sep = strchr(str, '='); |
| 68 | |
| 69 | if(sep - str == len && memcmp(str, variable, len) == 0) { |
| 70 | free(str); |
| 71 | |
| 72 | memcpy(cfg_environ + i, cfg_environ + i + 1, sizeof(char *) * (size - i)); |
| 73 | |
| 74 | cfg_environ = realloc(cfg_environ, sizeof(char *) * size); |
| 75 | |
| 76 | return; |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | void cfg_setenv(const char *variable, const char *newval) { |
| 82 | int size = env_size(); |
| 83 | |
| 84 | size_t len = strlen(variable); |
| 85 | |
| 86 | char *newstr = malloc(len + 1 + strlen(newval) + 1); |
| 87 | |
| 88 | strcpy(newstr, variable); |
| 89 | strcat(newstr, "="); |
| 90 | strcat(newstr, newval); |
| 91 | |
| 92 | if(size > 0) { |
| 93 | for(int i = 0; cfg_environ[i] != NULL; i++) { |
| 94 | char *str = cfg_environ[i], *sep = strchr(str, '='); |
| 95 | |
| 96 | if(sep - str == len && memcmp(str, variable, len) == 0) { |
| 97 | free(str); |
| 98 | |
| 99 | cfg_environ[i] = newstr; |
| 100 | |
| 101 | return; |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | cfg_environ = realloc(cfg_environ, sizeof(char *) * (size + 2)); |
| 107 | |
| 108 | cfg_environ[size] = newstr; |
| 109 | cfg_environ[size + 1] = NULL; |
| 110 | } |
| 111 | |
