add function to expand tilde and expand tilde on device specific config files

src/monocoque/helper/confighelper.c

@@ -10,7 +10,7 @@
 #include <libxml/tree.h>
 
 #include "confighelper.h"
-
+#include "dirhelper.h"
 
 #include "../slog/slog.h"
 #include "parameters.h"
@@ -458,7 +458,7 @@ int getconfigtouse(const char* config_file_str, char* car, int sim)
 }
 
 
-int loadtachconfig(const char* config_file, DeviceSettings* ds)
+int loadtachconfig(char* config_file, DeviceSettings* ds)
 {
 
 
@@ -605,6 +605,7 @@ static int load_device_specific_config(const char* config_file, DeviceSettings*
         else
         {
             ds->specific_config_file = strdup(config_file);
+            ds->specific_config_file = expand_tilde(ds->specific_config_file);
             slogt("will try to load config file at %s", ds->specific_config_file);
         }
     }
@@ -617,7 +618,7 @@ static int load_device_specific_config(const char* config_file, DeviceSettings*
             slogw("Tachometer must have a device specific config file!");
             return 1;
         }
-        return loadtachconfig(config_file, ds);
+        loadtachconfig(ds->specific_config_file, ds);
     }
     return 0;
 }

src/monocoque/helper/dirhelper.c

@@ -48,19 +48,12 @@ char* gethome()
     char* homedir = getenv("HOME");
     return homedir;
 
-    if (homedir != NULL)
-    {
-        printf("Home dir in enviroment");
-        printf("%s\n", homedir);
-    }
-
     uid_t uid = getuid();
     struct passwd* pw = getpwuid(uid);
 
     if (pw == NULL)
     {
-        printf("Failed\n");
-        exit(EXIT_FAILURE);
+        return NULL;
     }
 
     return pw->pw_dir;
@@ -269,3 +262,30 @@ bool does_file_exist(const char* file)
     return false;
 #endif
 }
+
+char* expand_tilde(char* path) {
+    if (path[0] != '~') {
+        return path;
+    }
+
+    const char* home_dir = getenv("HOME");
+    if (!home_dir) {
+        return path;
+    }
+
+    size_t expanded_size = strlen(home_dir) + strlen(path);
+    char* expanded_path = (char*)malloc(expanded_size + 1);
+
+    if (!expanded_path) {
+        return path;
+    }
+
+    strcpy(expanded_path, home_dir);
+    strcat(expanded_path, path + 1);
+
+    if (path) {
+        free(path);
+    }
+
+    return expanded_path;
+}

src/monocoque/helper/dirhelper.h

@@ -12,5 +12,6 @@ bool does_directory_exist(char* path);
 void restrict_folders_to_cache(char* path, int cachesize);
 void delete_dir(char* path);
 bool does_file_exist(const char* file);
+char* expand_tilde(char* path);
 
 #endif