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, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "configuration.h"
  28 #include "log.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 =
  40                 (char **)realloc(script_search_dirs, (num_script_dirs + 1) * sizeof(char *));
  41
  42         script_search_dirs[num_script_dirs-1] = strdup(dir);
  43         script_search_dirs[num_script_dirs] = NULL;
  44
  45         LOG_DEBUG("adding %s", dir);
  46 }
  47
  48 void add_config_command(const char *cfg)
  49 {
  50         num_config_files++;
  51         config_file_names =
  52                 (char **)realloc(config_file_names, (num_config_files + 1) * sizeof(char *));
  53
  54         config_file_names[num_config_files-1] = strdup(cfg);
  55         config_file_names[num_config_files] = NULL;
  56 }
  57
  58 /* return full path or NULL according to search rules */
  59 char *find_file(const char *file)
  60 {
  61         FILE *fp = NULL;
  62         char **search_dirs = script_search_dirs;
  63         char *dir;
  64         char const *mode = "r";
  65         char *full_path;
  66
  67         /* Check absolute and relative to current working dir first.
  68          * This keeps full_path reporting belowing working. */
  69         full_path = alloc_printf("%s", file);
  70         fp = fopen(full_path, mode);
  71
  72         while (!fp) {
  73                 free(full_path);
  74                 full_path = NULL;
  75                 dir = *search_dirs++;
  76
  77                 if (!dir)
  78                         break;
  79
  80                 full_path = alloc_printf("%s/%s", dir, file);
  81                 fp = fopen(full_path, mode);
  82         }
  83
  84         if (fp) {
  85                 fclose(fp);
  86                 LOG_DEBUG("found %s", full_path);
  87                 return full_path;
  88         }
  89
  90         free(full_path);
  91
  92         return NULL;
  93 }
  94
  95 FILE *open_file_from_path(const char *file, const char *mode)
  96 {
  97         if (mode[0] != 'r')
  98                 return fopen(file, mode);
  99         else {
 100                 char *full_path = find_file(file);
 101                 if (full_path == NULL)
 102                         return NULL;
 103                 FILE *fp = NULL;
 104                 fp = fopen(full_path, mode);
 105                 free(full_path);
 106                 return fp;
 107         }
 108 }
 109
 110 int parse_config_file(struct command_context *cmd_ctx)
 111 {
 112         int retval;
 113         char **cfg;
 114
 115         if (!config_file_names) {
 116                 command_run_line(cmd_ctx, "script openocd.cfg");
 117                 return ERROR_OK;
 118         }
 119
 120         cfg = config_file_names;
 121
 122         while (*cfg) {
 123                 retval = command_run_line(cmd_ctx, *cfg);
 124                 if (retval != ERROR_OK)
 125                         return retval;
 126                 cfg++;
 127         }
 128
 129         return ERROR_OK;
 130 }