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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 = 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 /* return full path or NULL according to search rules */
  57 char *find_file(const char *file)
  58 {
  59         FILE *fp = NULL;
  60         char **search_dirs = script_search_dirs;
  61         char *dir;
  62         char const *mode = "r";
  63         char *full_path;
  64
  65         /* Check absolute and relative to current working dir first.
  66          * This keeps full_path reporting belowing working. */
  67         full_path = alloc_printf("%s", file);
  68         fp = fopen(full_path, mode);
  69
  70         while (!fp) {
  71                 free(full_path);
  72                 full_path = NULL;
  73                 dir = *search_dirs++;
  74
  75                 if (!dir)
  76                         break;
  77
  78                 full_path = alloc_printf("%s/%s", dir, file);
  79                 fp = fopen(full_path, mode);
  80         }
  81
  82         if (fp) {
  83                 fclose(fp);
  84                 LOG_DEBUG("found %s", full_path);
  85                 return full_path;
  86         }
  87
  88         free(full_path);
  89
  90         return NULL;
  91 }
  92
  93 FILE *open_file_from_path(const char *file, const char *mode)
  94 {
  95         if (mode[0] != 'r')
  96                 return fopen(file, mode);
  97         else {
  98                 char *full_path = find_file(file);
  99                 if (full_path == NULL)
 100                         return NULL;
 101                 FILE *fp = NULL;
 102                 fp = fopen(full_path, mode);
 103                 free(full_path);
 104                 return fp;
 105         }
 106 }
 107
 108 int parse_config_file(struct command_context *cmd_ctx)
 109 {
 110         int retval;
 111         char **cfg;
 112
 113         if (!config_file_names) {
 114                 command_run_line(cmd_ctx, "script openocd.cfg");
 115                 return ERROR_OK;
 116         }
 117
 118         cfg = config_file_names;
 119
 120         while (*cfg) {
 121                 retval = command_run_line(cmd_ctx, *cfg);
 122                 if (retval != ERROR_OK)
 123                         return retval;
 124                 cfg++;
 125         }
 126
 127         return ERROR_OK;
 128 }
 129
 130 #ifndef _WIN32
 131 #include <pwd.h>
 132 #endif
 133
 134 char *get_home_dir(const char *append_path)
 135 {
 136         char *home = getenv("HOME");
 137
 138         if (home == NULL) {
 139
 140 #ifdef _WIN32
 141                 home = getenv("USERPROFILE");
 142
 143                 if (home == NULL) {
 144
 145                         char homepath[MAX_PATH];
 146                         char *drive = getenv("HOMEDRIVE");
 147                         char *path = getenv("HOMEPATH");
 148                         if (drive && path) {
 149                                 snprintf(homepath, MAX_PATH, "%s/%s", drive, path);
 150                                 home = homepath;
 151                         }
 152                 }
 153 #else
 154                 struct passwd *pwd = getpwuid(getuid());
 155                 if (pwd)
 156                         home = pwd->pw_dir;
 157
 158 #endif
 159         }
 160
 161         if (home == NULL)
 162                 return home;
 163
 164         char *home_path;
 165
 166         if (append_path)
 167                 home_path = alloc_printf("%s/%s", home, append_path);
 168         else
 169                 home_path = alloc_printf("%s", home);
 170
 171         return home_path;
 172 }