src/helper/configuration.c

   1 /***************************************************************************
   2  *   Copyright (C) 2004, 2005 by Dominic Rath                              *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  20  ***************************************************************************/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "configuration.h"
  27 #include "log.h"
  28 #include "replacements.h"
  29
  30 static size_t num_config_files;
  31 static char **config_file_names;
  32
  33 static size_t num_script_dirs;
  34 static char **script_search_dirs;
  35
  36 void add_script_search_dir(const char *dir)
  37 {
  38         num_script_dirs++;
  39         script_search_dirs = realloc(script_search_dirs, (num_script_dirs + 1) * sizeof(char *));
  40
  41         script_search_dirs[num_script_dirs-1] = strdup(dir);
  42         script_search_dirs[num_script_dirs] = NULL;
  43
  44         LOG_DEBUG("adding %s", dir);
  45 }
  46
  47 void add_config_command(const char *cfg)
  48 {
  49         num_config_files++;
  50         config_file_names = realloc(config_file_names, (num_config_files + 1) * sizeof(char *));
  51
  52         config_file_names[num_config_files-1] = strdup(cfg);
  53         config_file_names[num_config_files] = NULL;
  54 }
  55
  56 void free_config(void)
  57 {
  58         while (num_config_files)
  59                 free(config_file_names[--num_config_files]);
  60
  61         free(config_file_names);
  62         config_file_names = NULL;
  63
  64         while (num_script_dirs)
  65                 free(script_search_dirs[--num_script_dirs]);
  66
  67         free(script_search_dirs);
  68         script_search_dirs = NULL;
  69 }
  70
  71 /* return full path or NULL according to search rules */
  72 char *find_file(const char *file)
  73 {
  74         FILE *fp = NULL;
  75         char **search_dirs = script_search_dirs;
  76         char *dir;
  77         char const *mode = "r";
  78         char *full_path;
  79
  80         /* Check absolute and relative to current working dir first.
  81          * This keeps full_path reporting belowing working. */
  82         full_path = alloc_printf("%s", file);
  83         fp = fopen(full_path, mode);
  84
  85         while (!fp) {
  86                 free(full_path);
  87                 full_path = NULL;
  88                 dir = *search_dirs++;
  89
  90                 if (!dir)
  91                         break;
  92
  93                 full_path = alloc_printf("%s/%s", dir, file);
  94                 fp = fopen(full_path, mode);
  95         }
  96
  97         if (fp) {
  98                 fclose(fp);
  99                 LOG_DEBUG("found %s", full_path);
 100                 return full_path;
 101         }
 102
 103         free(full_path);
 104
 105         return NULL;
 106 }
 107
 108 FILE *open_file_from_path(const char *file, const char *mode)
 109 {
 110         if (mode[0] != 'r')
 111                 return fopen(file, mode);
 112         else {
 113                 char *full_path = find_file(file);
 114                 if (!full_path)
 115                         return NULL;
 116                 FILE *fp = NULL;
 117                 fp = fopen(full_path, mode);
 118                 free(full_path);
 119                 return fp;
 120         }
 121 }
 122
 123 int parse_config_file(struct command_context *cmd_ctx)
 124 {
 125         int retval;
 126         char **cfg;
 127
 128         if (!config_file_names) {
 129                 command_run_line(cmd_ctx, "script openocd.cfg");
 130                 return ERROR_OK;
 131         }
 132
 133         cfg = config_file_names;
 134
 135         while (*cfg) {
 136                 retval = command_run_line(cmd_ctx, *cfg);
 137                 if (retval != ERROR_OK)
 138                         return retval;
 139                 cfg++;
 140         }
 141
 142         return ERROR_OK;
 143 }
 144
 145 #ifndef _WIN32
 146 #include <pwd.h>
 147 #endif
 148
 149 char *get_home_dir(const char *append_path)
 150 {
 151         char *home = getenv("HOME");
 152
 153         if (!home) {
 154
 155 #ifdef _WIN32
 156                 home = getenv("USERPROFILE");
 157
 158                 if (!home) {
 159
 160                         char homepath[MAX_PATH];
 161                         char *drive = getenv("HOMEDRIVE");
 162                         char *path = getenv("HOMEPATH");
 163                         if (drive && path) {
 164                                 snprintf(homepath, MAX_PATH, "%s/%s", drive, path);
 165                                 home = homepath;
 166                         }
 167                 }
 168 #else
 169                 struct passwd *pwd = getpwuid(getuid());
 170                 if (pwd)
 171                         home = pwd->pw_dir;
 172
 173 #endif
 174         }
 175
 176         if (!home)
 177                 return home;
 178
 179         char *home_path;
 180
 181         if (append_path)
 182                 home_path = alloc_printf("%s/%s", home, append_path);
 183         else
 184                 home_path = alloc_printf("%s", home);
 185
 186         return home_path;
 187 }