Streamline menu callbacks

menu.c

@@ -22,7 +22,7 @@
 #include "wayland.h"
 
 // Creates and returns a new menu.
-struct menu *menu_create() {
+struct menu *menu_create(menu_callback callback) {
 	struct menu *menu = calloc(1, sizeof(struct menu));
 	menu->strncmp = strncmp;
 	menu->font = "monospace 10";
@@ -32,6 +32,7 @@ struct menu *menu_create() {
 	menu->promptfg = 0xeeeeeeff;
 	menu->selectionbg = 0x005577ff;
 	menu->selectionfg = 0xeeeeeeff;
+	menu->callback = callback;
 	return menu;
 }
 
@@ -571,18 +572,10 @@ void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,
 	case XKB_KEY_Return:
 	case XKB_KEY_KP_Enter:
 		if (shift) {
-			puts(menu->input);
-			fflush(stdout);
-			menu->exit = true;
-		} else if (menu->callback) {
-			menu->callback(menu);
+			menu->callback(menu, menu->input, true);
 		} else {
 			char *text = menu->sel ? menu->sel->text : menu->input;
-			puts(text);
-			fflush(stdout);
-			if (!ctrl) {
-				menu->exit = true;
-			}
+			menu->callback(menu, text, !ctrl);
 		}
 		break;
 	case XKB_KEY_Left:

menu.h

@@ -6,6 +6,9 @@
 #include <xkbcommon/xkbcommon.h>
 #include <wayland-client.h>
 
+struct menu;
+typedef void (*menu_callback)(struct menu *menu, char *text, bool exit);
+
 // A menu item.
 struct item {
 	char *text;
@@ -68,12 +71,12 @@ struct menu {
 	struct item *sel;         // selected item
 	struct page *pages;       // list of pages
 
-	void (*callback)(struct menu *menu);
+	menu_callback callback;
 	bool exit;
 	bool failure;
 };
 
-struct menu *menu_create();
+struct menu *menu_create(menu_callback callback);
 void menu_destroy(struct menu *menu);
 void menu_getopts(struct menu *menu, int argc, char *argv[]);
 void menu_add_item(struct menu *menu, char *text, bool sort);

wayland.c

@@ -494,11 +494,10 @@ int menu_run(struct menu *menu) {
 		}
 	}
 
-	bool failure = menu->failure;
 	context_destroy(context);
 	menu->context = NULL;
 
-	if (failure) {
+	if (menu->failure) {
 		return EXIT_FAILURE;
 	}
 	return EXIT_SUCCESS;

wmenu-run.c

@@ -1,6 +1,6 @@
 #define _POSIX_C_SOURCE 200809L
 #include <dirent.h>
-#include <errno.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
@@ -27,46 +27,48 @@ static void read_items(struct menu *menu) {
 	free(path);
 }
 
-struct executable {
+struct command {
 	struct menu *menu;
-	char *name;
+	char *text;
+	bool exit;
 };
 
 static void activation_token_done(void *data, struct xdg_activation_token_v1 *activation_token,
 	const char *token) {
-	struct executable *exe = data;
+	struct command *cmd = data;
 	xdg_activation_token_v1_destroy(activation_token);
-	menu_destroy(exe->menu);
 
-	setenv("XDG_ACTIVATION_TOKEN", token, true);
-	char* cmd[] = {"/bin/sh", "-c", exe->name, NULL};
-	execvp(cmd[0], (char**)cmd);
-
-	fprintf(stderr, "Failed to execute selection: %s\n", strerror(errno));
-	free(exe->name);
-	free(exe);
-	exit(EXIT_FAILURE);
+	int pid = fork();
+	if (pid == 0) {
+		setenv("XDG_ACTIVATION_TOKEN", token, true);
+		char *argv[] = {"/bin/sh", "-c", cmd->text, NULL};
+		execvp(argv[0], (char**)argv);
+	} else {
+		if (cmd->exit) {
+			cmd->menu->exit = true;
+		}
+	}
 }
 
 static const struct xdg_activation_token_v1_listener activation_token_listener = {
 	.done = activation_token_done,
 };
 
-static void exec(struct menu *menu) {
-	struct executable *exe = calloc(1, sizeof(struct executable));
-	exe->menu = menu;
-	exe->name = strdup(menu->input);
+static void exec_item(struct menu *menu, char *text, bool exit) {
+	struct command *cmd = calloc(1, sizeof(struct command));
+	cmd->menu = menu;
+	cmd->text = strdup(text);
+	cmd->exit = exit;
 
 	struct xdg_activation_v1 *activation = context_get_xdg_activation(menu->context);
 	struct xdg_activation_token_v1 *activation_token = xdg_activation_v1_get_activation_token(activation);
 	xdg_activation_token_v1_set_surface(activation_token, context_get_surface(menu->context));
-	xdg_activation_token_v1_add_listener(activation_token, &activation_token_listener, exe);
+	xdg_activation_token_v1_add_listener(activation_token, &activation_token_listener, cmd);
 	xdg_activation_token_v1_commit(activation_token);
 }
 
 int main(int argc, char *argv[]) {
-	struct menu *menu = menu_create();
-	menu->callback = exec;
+	struct menu *menu = menu_create(exec_item);
 	menu_getopts(menu, argc, argv);
 	read_items(menu);
 	int status = menu_run(menu);

wmenu.c

@@ -1,5 +1,6 @@
 #define _POSIX_C_SOURCE 200809L
 
+#include <stdio.h>
 #include <string.h>
 
 #include "menu.h"
@@ -16,8 +17,16 @@ static void read_items(struct menu *menu) {
 	}
 }
 
+static void print_item(struct menu *menu, char *text, bool exit) {
+	puts(text);
+	fflush(stdout);
+	if (exit) {
+		menu->exit = true;
+	}
+}
+
 int main(int argc, char *argv[]) {
-	struct menu *menu = menu_create();
+	struct menu *menu = menu_create(print_item);
 	menu_getopts(menu, argc, argv);
 	read_items(menu);
 	int status = menu_run(menu);