util: Add GFileError to errno converter

[util] Add GFileError to errno converter. JB#61966

Map the errors in G_FILE_ERROR domain to matching errnos. Return
-EBADMSG if error is NULL and -ENOTSUP when domain is not G_FILE_ERROR.

connman/src/shared/util.c

@@ -186,6 +186,64 @@ static bool is_file_symlink(const char *filename)
 	return false;
 }
 
+int util_g_file_error_to_errno(int code)
+{
+	switch (code) {
+	case G_FILE_ERROR_EXIST:
+		return -EEXIST;
+	case G_FILE_ERROR_ISDIR:
+		return -EISDIR;
+	case G_FILE_ERROR_ACCES:
+		return -EACCES;
+	case G_FILE_ERROR_NAMETOOLONG:
+		return -ENAMETOOLONG;
+	case G_FILE_ERROR_NOENT:
+		return -ENOENT;
+	case G_FILE_ERROR_NOTDIR:
+		return -ENOTDIR;
+	case G_FILE_ERROR_NXIO:
+		return -ENXIO;
+	case G_FILE_ERROR_NODEV:
+		return -ENODEV;
+	case G_FILE_ERROR_ROFS:
+		return -EROFS;
+	case G_FILE_ERROR_TXTBSY:
+		return -ETXTBSY;
+	case G_FILE_ERROR_FAULT:
+		return -EFAULT;
+	case G_FILE_ERROR_LOOP:
+		return -ELOOP;
+	case G_FILE_ERROR_NOSPC:
+		return -ENOSPC;
+	case G_FILE_ERROR_NOMEM:
+		return -ENOMEM;
+	case G_FILE_ERROR_MFILE:
+		return -EMFILE;
+	case G_FILE_ERROR_NFILE:
+		return -ENFILE;
+	case G_FILE_ERROR_BADF:
+		return EBADF;
+	case G_FILE_ERROR_INVAL:
+		return -EINVAL;
+	case G_FILE_ERROR_PIPE:
+		return -EPIPE;
+	case G_FILE_ERROR_AGAIN:
+		return -EAGAIN;
+	case G_FILE_ERROR_INTR:
+		return -EINTR;
+	case G_FILE_ERROR_IO:
+		return -EIO;
+	case G_FILE_ERROR_PERM:
+		return -EPERM;
+	case G_FILE_ERROR_NOSYS:
+		return -ENOSYS;
+	case G_FILE_ERROR_FAILED:
+		return -EINVAL;
+	}
+
+	return -EINVAL;
+}
+
 int util_read_config_files_from(const char *path, const char *suffix,
 					GList **conffiles, config_callback cb)
 {
@@ -207,7 +265,7 @@ int util_read_config_files_from(const char *path, const char *suffix,
 		if (error) {
 			connman_warn("cannot open dir %s, error: %s", path,
 								error->message);
-			err = -error->code;
+			err = util_g_file_error_to_errno(error->code);
 		} else {
 			err = -ENOMEM;
 		}

connman/src/shared/util.h

@@ -65,5 +65,6 @@ bool util_get_afs(bool *afs, int family);
 void util_reset_afs(bool *afs);
 
 typedef int (*config_callback) (const char *filepath);
+int util_g_file_error_to_errno(int code);
 int util_read_config_files_from(const char *path, const char *suffix,
 					GList **conffiles, config_callback cb);