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 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "configuration.h"
  26 #include "log.h"
  27
  28 static size_t num_config_files;
  29 static char **config_file_names;
  30
  31 static size_t num_script_dirs;
  32 static char **script_search_dirs;
  33
  34 void add_script_search_dir(const char *dir)
  35 {
  36         num_script_dirs++;
  37         script_search_dirs = realloc(script_search_dirs, (num_script_dirs + 1) * sizeof(char *));
  38
  39         script_search_dirs[num_script_dirs-1] = strdup(dir);
  40         script_search_dirs[num_script_dirs] = NULL;
  41
  42         LOG_DEBUG("adding %s", dir);
  43 }
  44
  45 void add_config_command(const char *cfg)
  46 {
  47         num_config_files++;
  48         config_file_names = realloc(config_file_names, (num_config_files + 1) * sizeof(char *));
  49
  50         config_file_names[num_config_files-1] = strdup(cfg);
  51         config_file_names[num_config_files] = NULL;
  52 }
  53
  54 /* return full path or NULL according to search rules */
  55 char *find_file(const char *file)
  56 {
  57         FILE *fp = NULL;
  58         char **search_dirs = script_search_dirs;
  59         char *dir;
  60         char const *mode = "r";
  61         char *full_path;
  62
  63         /* Check absolute and relative to current working dir first.
  64          * This keeps full_path reporting belowing working. */
  65         full_path = alloc_printf("%s", file);
  66         fp = fopen(full_path, mode);
  67
  68         while (!fp) {
  69                 free(full_path);
  70                 full_path = NULL;
  71                 dir = *search_dirs++;
  72
  73                 if (!dir)
  74                         break;
  75
  76                 full_path = alloc_printf("%s/%s", dir, file);
  77                 fp = fopen(full_path, mode);
  78         }
  79
  80         if (fp) {
  81                 fclose(fp);
  82                 LOG_DEBUG("found %s", full_path);
  83                 return full_path;
  84         }
  85
  86         free(full_path);
  87
  88         return NULL;
  89 }
  90
  91 FILE *open_file_from_path(const char *file, const char *mode)
  92 {
  93         if (mode[0] != 'r')
  94                 return fopen(file, mode);
  95         else {
  96                 char *full_path = find_file(file);
  97                 if (full_path == NULL)
  98                         return NULL;
  99                 FILE *fp = NULL;
 100                 fp = fopen(full_path, mode);
 101                 free(full_path);
 102                 return fp;
 103         }
 104 }
 105
 106 int parse_config_file(struct command_context *cmd_ctx)
 107 {
 108         int retval;
 109         char **cfg;
 110
 111         if (!config_file_names) {
 112                 command_run_line(cmd_ctx, "script openocd.cfg");
 113                 return ERROR_OK;
 114         }
 115
 116         cfg = config_file_names;
 117
 118         while (*cfg) {
 119                 retval = command_run_line(cmd_ctx, *cfg);
 120                 if (retval != ERROR_OK)
 121                         return retval;
 122                 cfg++;
 123         }
 124
 125         return ERROR_OK;
 126 }
 127
 128 #ifndef _WIN32
 129 #include <pwd.h>
 130 #endif
 131
 132 char *get_home_dir(const char *append_path)
 133 {
 134         char *home = getenv("HOME");
 135
 136         if (home == NULL) {
 137
 138 #ifdef _WIN32
 139                 home = getenv("USERPROFILE");
 140
 141                 if (home == NULL) {
 142
 143                         char homepath[MAX_PATH];
 144                         char *drive = getenv("HOMEDRIVE");
 145                         char *path = getenv("HOMEPATH");
 146                         if (drive && path) {
 147                                 snprintf(homepath, MAX_PATH, "%s/%s", drive, path);
 148                                 home = homepath;
 149                         }
 150                 }
 151 #else
 152                 struct passwd *pwd = getpwuid(getuid());
 153                 if (pwd)
 154                         home = pwd->pw_dir;
 155
 156 #endif
 157         }
 158
 159         if (home == NULL)
 160                 return home;
 161
 162         char *home_path;
 163
 164         if (append_path)
 165                 home_path = alloc_printf("%s/%s", home, append_path);
 166         else
 167                 home_path = alloc_printf("%s", home);
 168
 169         return home_path;
 170 }