ui/language.c

   1 /* language.c
   2  * Language "preference" handling routines
   3  * Copyright 2014, Michal Labedzki for Tieto Corporation
   4  *
   5  * Wireshark - Network traffic analyzer
   6  * By Gerald Combs <gerald@wireshark.org>
   7  * Copyright 1998 Gerald Combs
   8  *
   9  * SPDX-License-Identifier: GPL-2.0-or-later
  10  */
  11
  12 #include "config.h"
  13
  14 #include <stdlib.h>
  15 #include <errno.h>
  16
  17 #include <epan/prefs.h>
  18 #include <epan/prefs-int.h>
  19
  20 #include <wsutil/filesystem.h>
  21 #include <wsutil/file_util.h>
  22
  23 #include "ui/language.h"
  24 #include "ui/simple_dialog.h"
  25
  26 #define LANGUAGE_FILE_NAME      "language"
  27 #define LANGUAGE_PREF_LANGUAGE  "language"
  28
  29 char *language;
  30
  31 /* set one user's recent common file key/value pair */
  32 static prefs_set_pref_e
  33 read_language_pref(char *key, const char *value,
  34                    void *private_data _U_, bool return_range_errors _U_)
  35 {
  36     if (strcmp(key, LANGUAGE_PREF_LANGUAGE) == 0) {
  37         g_free(language);
  38         /*
  39          * For backwards compatibility, treat "auto" as meaning "use the
  40          * system language".
  41          *
  42          * To handle the old buggy code that didn't check whether "language"
  43          * was null before trying to print it, treat "(null)" - which many,
  44          * but *NOT* all, system printfs print for a null pointer (some
  45          * printfs, such as the one in Solaris, *crash* with %s and a null
  46          * pointer) - as meaning "use the system language".
  47          */
  48         if (!value || !*value || strcmp(value, "auto") == 0 ||
  49             strcmp(value, "(null)") == 0)
  50             language = g_strdup(USE_SYSTEM_LANGUAGE);
  51         else
  52             language = g_strdup(value);
  53     }
  54
  55     return PREFS_SET_OK;
  56 }
  57
  58 void
  59 read_language_prefs(void)
  60 {
  61     char       *rf_path;
  62     FILE       *rf;
  63
  64     rf_path = get_persconffile_path(LANGUAGE_FILE_NAME, false);
  65
  66     if ((rf = ws_fopen(rf_path, "r")) != NULL) {
  67         read_prefs_file(rf_path, rf, read_language_pref, NULL);
  68
  69         fclose(rf);
  70     }
  71
  72     g_free(rf_path);
  73 }
  74
  75 bool
  76 write_language_prefs(void)
  77 {
  78     char        *pf_dir_path;
  79     char        *rf_path;
  80     FILE        *rf;
  81
  82     /* To do:
  83     * - Split output lines longer than MAX_VAL_LEN
  84     * - Create a function for the preference directory check/creation
  85     *   so that duplication can be avoided with filter.c
  86     */
  87
  88     /* Create the directory that holds personal configuration files, if
  89         necessary.  */
  90     if (create_persconffile_dir(&pf_dir_path) == -1) {
  91         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
  92         "Can't create directory\n\"%s\"\nfor language file: %s.", pf_dir_path,
  93         g_strerror(errno));
  94         g_free(pf_dir_path);
  95         return false;
  96     }
  97
  98     rf_path = get_persconffile_path(LANGUAGE_FILE_NAME, false);
  99     if ((rf = ws_fopen(rf_path, "w")) == NULL) {
 100         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
 101         "Can't open recent file\n\"%s\": %s.", rf_path,
 102         g_strerror(errno));
 103         g_free(rf_path);
 104         return false;
 105     }
 106     g_free(rf_path);
 107
 108     fputs("# Language settings file for Wireshark " VERSION ".\n"
 109         "#\n"
 110         "# This file is regenerated each time Wireshark is quit.\n"
 111         "# So be careful, if you want to make manual changes here.\n"
 112         "\n", rf);
 113
 114     fprintf(rf, LANGUAGE_PREF_LANGUAGE ": %s\n", language ? language : USE_SYSTEM_LANGUAGE);
 115
 116     fclose(rf);
 117
 118     return true;
 119 }