Use XDG_DATA_HOME as location for the history file.
Also reads and migrates the history from the old location in the users
home directory if present.
---
 client/display.c | 68 +++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 62 insertions(+), 6 deletions(-)

diff --git a/client/display.c b/client/display.c
index 10c87b2a..d1a1a7f7 100644
--- a/client/display.c
+++ b/client/display.c
@@ -27,6 +27,9 @@
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <signal.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>

 #include <readline/history.h>
 #include <readline/readline.h>
@@ -632,22 +635,75 @@ static void signal_handler(void *user_data)
 		display_refresh_reset();
 }

+char * get_data_dir()
+{
+	const char *xdg_data_home;
+	const char *home_path;
+	char *data_dir;
+
+	xdg_data_home = getenv("XDG_DATA_HOME");
+	if (!xdg_data_home || *xdg_data_home != '/') {
+		home_path = getenv("HOME");
+		if (home_path)
+			data_dir = l_strdup_printf("%s/%s", home_path,
+						".local/share/iwctl");
+		else
+			return NULL;
+	} else {
+		data_dir = l_strdup_printf("%s/%s", xdg_data_home,
+							"iwctl");
+	}
+	return data_dir;
+}
+
+char * get_old_history_file()
+{
+	const char *home_path;
+	char *old_history_path;
+	struct stat st;
+	int err;
+
+	home_path = getenv("HOME");
+	if (home_path) {
+		old_history_path = l_strdup_printf("%s/%s", home_path,
+						".iwctl_history");
+
+		err = stat(old_history_path, &st);
+		if (err || !S_ISREG(st.st_mode)) {
+			l_free(old_history_path);
+			return NULL;
+		}
+	}
+	return old_history_path;
+}
+
 static char *history_path;

 void display_init(void)
 {
-	const char *home_path;
+	char *data_dir;
+	char *old_history_file;

 	display_refresh.redo_entries = l_queue_new();

 	stifle_history(24);

-	home_path = getenv("HOME");
-	if (home_path)
-		history_path = l_strdup_printf("%s/%s", home_path,
-							".iwctl_history");
+	data_dir = get_data_dir();
+	if (data_dir) {
+		mkdir(data_dir,0700);
+
+		history_path = l_strdup_printf("%s/%s", data_dir,
+							"history");
+		l_free(data_dir);
+	}

-	read_history(history_path);
+	old_history_file = get_old_history_file();
+	if (old_history_file) {
+		read_history(old_history_file);
+		unlink(old_history_file);
+		l_free(old_history_file);
+	} else
+		read_history(history_path);

 	setlinebuf(stdout);

--
2.24.0