bemenu-run: add --fork option

Make terminal backends not fork by default.
Use this option to fork again on curses.
For non terminal backends this option is no-op.

client/bemenu-run.c

@@ -130,15 +130,17 @@ read_items_to_menu_from_path(struct bm_menu *menu)
 static inline void ignore_ret(int useless, ...) { (void)useless; }
 
 static void
-launch(const char *bin)
+launch(const struct client *client, const char *bin)
 {
     if (!bin)
         return;
 
-    if (fork() == 0) {
-        setsid();
-        ignore_ret(0, freopen("/dev/null", "w", stdout));
-        ignore_ret(0, freopen("/dev/null", "w", stderr));
+    if (!client->fork || fork() == 0) {
+        if (client->fork) {
+            setsid();
+            ignore_ret(0, freopen("/dev/null", "w", stdout));
+            ignore_ret(0, freopen("/dev/null", "w", stderr));
+        }
 
         char **tokens;
         if (!(tokens = tokenize_quoted_to_argv(bin, NULL, NULL)))
@@ -150,10 +152,9 @@ launch(const char *bin)
 }
 
 static void
-item_cb(struct bm_item *item, const char *text)
+item_cb(const struct client *client, struct bm_item *item)
 {
-    (void)item; // may be null
-    launch(text);
+    launch(client, bm_item_get_text(item));
 }
 
 int

client/bemenu.c

@@ -48,9 +48,10 @@ read_items_to_menu_from_stdin(struct bm_menu *menu)
 }
 
 static void
-item_cb(struct bm_item *item, const char *text)
+item_cb(const struct client *client, struct bm_item *item)
 {
-    (void)item; // may be null
+    (void)client;
+    const char *text = bm_item_get_text(item);
     printf("%s\n", (text ? text : ""));
 }
 

client/common/common.c

@@ -174,7 +174,8 @@ usage(FILE *out, const char *name)
           " -P, --prefix          text to show before highlighted item.\n"
           " -I, --index           select item at index automatically.\n"
           " --scrollbar           display scrollbar. (always, autohide)\n"
-          " --ifne                only display menu if there are items.\n\n"
+          " --ifne                only display menu if there are items.\n"
+          " --fork                always fork. (bemenu-run)\n\n"
 
           "Use BEMENU_BACKEND env variable to force backend:\n"
           " curses               ncurses based terminal backend\n"
@@ -226,6 +227,7 @@ do_getopt(struct client *client, int *argc, char **argv[])
         { "prefix",      required_argument, 0, 'P' },
         { "scrollbar",   required_argument, 0, 0x100 },
         { "ifne",        no_argument,       0, 0x115 },
+        { "fork",        required_argument, 0, 0x116 },
 
         { "bottom",      no_argument,       0, 'b' },
         { "grab",        no_argument,       0, 'f' },
@@ -291,6 +293,9 @@ do_getopt(struct client *client, int *argc, char **argv[])
             case 0x115:
                 client->ifne = true;
                 break;
+            case 0x116:
+                client->force_fork = true;
+                break;
 
             case 'b':
                 client->bottom = true;
@@ -376,12 +381,14 @@ parse_args(struct client *client, int *argc, char **argv[])
 }
 
 struct bm_menu*
-menu_with_options(const struct client *client)
+menu_with_options(struct client *client)
 {
     struct bm_menu *menu;
     if (!(menu = bm_menu_new(NULL)))
         return NULL;
 
+    client->fork = (client->force_fork || (bm_renderer_get_priorty(bm_menu_get_renderer(menu)) != BM_PRIO_TERMINAL));
+
     bm_menu_set_font(menu, client->font);
     bm_menu_set_line_height(menu, client->line_height);
     bm_menu_set_title(menu, client->title);
@@ -408,7 +415,7 @@ menu_with_options(const struct client *client)
 }
 
 enum bm_run_result
-run_menu(const struct client *client, struct bm_menu *menu, void (*item_cb)(struct bm_item *item, const char *text))
+run_menu(const struct client *client, struct bm_menu *menu, void (*item_cb)(const struct client *client, struct bm_item *item))
 {
     bm_menu_set_highlighted_index(menu, client->selected);
     bm_menu_grab_keyboard(menu, true);
@@ -427,10 +434,7 @@ run_menu(const struct client *client, struct bm_menu *menu, void (*item_cb)(stru
     if (status == BM_RUN_RESULT_SELECTED) {
         uint32_t i, count;
         struct bm_item **items = bm_menu_get_selected_items(menu, &count);
-        for (i = 0; i < count; ++i) {
-            const char *text = bm_item_get_text(items[i]);
-            item_cb(items[i], text);
-        }
+        for (i = 0; i < count; ++i) item_cb(client, items[i]);
     }
 
     return status;

client/common/common.h

@@ -20,13 +20,14 @@ struct client {
     bool wrap;
     bool ifne;
     bool no_overlap;
+    bool force_fork, fork;
 };
 
 char* cstrcopy(const char *str, size_t size);
 char** tokenize_quoted_to_argv(const char *str, char *argv0, int *out_argc);
 void parse_args(struct client *client, int *argc, char **argv[]);
-struct bm_menu* menu_with_options(const struct client *client);
-enum bm_run_result run_menu(const struct client *client, struct bm_menu *menu, void (*item_cb)(struct bm_item *item, const char *text));
+struct bm_menu* menu_with_options(struct client *client);
+enum bm_run_result run_menu(const struct client *client, struct bm_menu *menu, void (*item_cb)(const struct client *client, struct bm_item *item));
 
 #endif /* _BM_COMMON_H_ */
 

lib/bemenu.h

@@ -252,6 +252,14 @@ void bm_menu_free_items(struct bm_menu *menu);
  * @name Menu Properties
  * @{ */
 
+/**
+ * Get the renderer from the bm_menu instance.
+ *
+ * @param menu bm_menu instance which renderer to get.
+ * @return Pointer to bm_renderer instance.
+ */
+const struct bm_renderer* bm_menu_get_renderer(struct bm_menu *menu);
+
 /**
  * Set userdata pointer to bm_menu instance.
  * Userdata will be carried unmodified by the instance.

lib/menu.c

@@ -139,6 +139,13 @@ bm_menu_free_items(struct bm_menu *menu)
         free(menu->filter_item);
 }
 
+const struct bm_renderer*
+bm_menu_get_renderer(struct bm_menu *menu)
+{
+    assert(menu);
+    return menu->renderer;
+}
+
 void
 bm_menu_set_userdata(struct bm_menu *menu, void *userdata)
 {

man/bemenu.1

@@ -91,6 +91,11 @@ Show scrollbar only when necessary.
 .B \-\-ifne
 Only displays the menu when there are items.
 
+.TP
+.B \-\-fork
+Always fork. (bemenu-run)
+By default terminal backends won't fork.
+
 .SS Backend-specific Options
 
 These options are only available on backends specified in the parentheses