git.maemo.org Git - browser-switch/blob - config-ui/save-config.c

   1 /*
   2  * save-config.c -- functions to save a Browser Switchboard configuration
   3  *
   4  * Copyright (C) 2009-2010 Steven Luo
   5  * Derived from a Python implementation by Jason Simpson and Steven Luo
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20  * USA.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include <unistd.h>
  27 #include <sys/types.h>
  28 #include <sys/stat.h>
  29
  30 #include "configfile.h"
  31 #include "config.h"
  32
  33 /* Save the settings in the provided swb_config struct to the config file
  34    Returns true on success, false otherwise */
  35 int swb_config_save(struct swb_config *cfg) {
  36         FILE *fp = NULL, *tmpfp = NULL;
  37         char *homedir, *tempfile, *newfile;
  38         size_t len;
  39         int retval = 1;
  40         struct swb_config_line line;
  41         unsigned int oldcfg_seen = 0;
  42
  43         /* If CONFIGFILE_DIR doesn't exist already, try to create it */
  44         if (!(homedir = getenv("HOME")))
  45                 homedir = DEFAULT_HOMEDIR;
  46         len = strlen(homedir) + strlen(CONFIGFILE_DIR) + 1;
  47         if (!(newfile = calloc(len, sizeof(char))))
  48                 return 0;
  49         snprintf(newfile, len, "%s%s", homedir, CONFIGFILE_DIR);
  50         if (access(newfile, F_OK) == -1 && errno == ENOENT) {
  51                 mkdir(newfile, 0750);
  52         }
  53         free(newfile);
  54
  55         /* Put together the path to the new config file and the tempfile */
  56         len = strlen(homedir) + strlen(CONFIGFILE_LOC) + 1;
  57         if (!(newfile = calloc(len, sizeof(char))))
  58                 return 0;
  59         /* 4 = strlen(".tmp") */
  60         if (!(tempfile = calloc(len+4, sizeof(char)))) {
  61                 free(newfile);
  62                 return 0;
  63         }
  64         snprintf(newfile, len, "%s%s", homedir, CONFIGFILE_LOC);
  65         snprintf(tempfile, len+4, "%s%s", newfile, ".tmp");
  66
  67         /* Open the temporary file for writing */
  68         if (!(tmpfp = fopen(tempfile, "w"))) {
  69                 retval = 0;
  70                 goto out;
  71         }
  72
  73         /* Open the old config file, if it exists */
  74         if ((fp = open_config_file()) && parse_config_file_begin()) {
  75                 /* Copy the old config file over to the new one line by line,
  76                    replacing old config values with new ones
  77                    TODO: should we handle errors differently than EOF? */
  78                 while (!parse_config_file_line(fp, &line)) {
  79                         if (line.parsed) {
  80                                 /* Is a config line, print the new value here */
  81                                 if (!strcmp(line.key, "continuous_mode")) {
  82                                         if (!(oldcfg_seen &
  83                                               SWB_CONFIG_CONTINUOUS_MODE_SET)) {
  84                                                 fprintf(tmpfp, "%s = %d\n",
  85                                                         line.key,
  86                                                         cfg->continuous_mode);
  87                                                 oldcfg_seen |=
  88                                                         SWB_CONFIG_CONTINUOUS_MODE_SET;
  89                                         }
  90                                 } else if (!strcmp(line.key,
  91                                                    "default_browser")) {
  92                                         if (!(oldcfg_seen &
  93                                               SWB_CONFIG_DEFAULT_BROWSER_SET)) {
  94                                                 fprintf(tmpfp, "%s = \"%s\"\n",
  95                                                         line.key,
  96                                                         cfg->default_browser);
  97                                                 oldcfg_seen |=
  98                                                         SWB_CONFIG_DEFAULT_BROWSER_SET;
  99                                         }
 100                                 } else if (!strcmp(line.key,
 101                                                    "other_browser_cmd")) {
 102                                         if (!(oldcfg_seen &
 103                                               SWB_CONFIG_OTHER_BROWSER_CMD_SET)) {
 104                                                 fprintf(tmpfp, "%s = \"%s\"\n",
 105                                                         line.key,
 106                                                         cfg->other_browser_cmd);
 107                                                 oldcfg_seen |=
 108                                                         SWB_CONFIG_OTHER_BROWSER_CMD_SET;
 109                                         }
 110                                 } else if (!strcmp(line.key,
 111                                                    "logging")) {
 112                                         if (!(oldcfg_seen &
 113                                               SWB_CONFIG_LOGGING_SET)) {
 114                                                 fprintf(tmpfp, "%s = \"%s\"\n",
 115                                                         line.key,
 116                                                         cfg->logging);
 117                                                 oldcfg_seen |=
 118                                                         SWB_CONFIG_LOGGING_SET;
 119                                         }
 120                                 }
 121                         } else {
 122                                 /* Just copy the old line over */
 123                                 fprintf(tmpfp, "%s\n", line.key);
 124                         }
 125                         free(line.key);
 126                         free(line.value);
 127                 }
 128                 parse_config_file_end();
 129         }
 130
 131         /* If we haven't written them yet, write out any new config values */
 132         if (!(oldcfg_seen & SWB_CONFIG_CONTINUOUS_MODE_SET) &&
 133             (cfg->flags & SWB_CONFIG_CONTINUOUS_MODE_SET))
 134                 fprintf(tmpfp, "%s = %d\n",
 135                         "continuous_mode", cfg->continuous_mode);
 136         if (!(oldcfg_seen & SWB_CONFIG_DEFAULT_BROWSER_SET) &&
 137             (cfg->flags & SWB_CONFIG_DEFAULT_BROWSER_SET))
 138                 fprintf(tmpfp, "%s = \"%s\"\n",
 139                         "default_browser", cfg->default_browser);
 140         if (!(oldcfg_seen & SWB_CONFIG_OTHER_BROWSER_CMD_SET) &&
 141             (cfg->flags & SWB_CONFIG_OTHER_BROWSER_CMD_SET))
 142                 fprintf(tmpfp, "%s = \"%s\"\n",
 143                         "other_browser_cmd", cfg->other_browser_cmd);
 144         if (!(oldcfg_seen & SWB_CONFIG_LOGGING_SET) &&
 145             (cfg->flags & SWB_CONFIG_LOGGING_SET))
 146                 fprintf(tmpfp, "%s = \"%s\"\n",
 147                         "logging", cfg->logging);
 148
 149         /* Replace the old config file with the new one */
 150         fclose(tmpfp);
 151         tmpfp = NULL;
 152         rename(tempfile, newfile);
 153
 154 out:
 155         free(newfile);
 156         free(tempfile);
 157         if (tmpfp)
 158                 fclose(tmpfp);
 159         if (fp)
 160                 fclose(fp);
 161         return retval;
 162 }