i3-nagbar: add button flag to execute action with /bin/sh directly.

Fixes #2765.

i3-nagbar/main.c

@@ -50,6 +50,7 @@ static char *argv0 = NULL;
 typedef struct {
     i3String *label;
     char *action;
+    bool exec_in_terminal;
     int16_t x;
     uint16_t width;
 } button_t;
@@ -123,6 +124,51 @@ static void start_application(const char *command) {
     wait(0);
 }
 
+static void execute_in_terminal(const char *command) {
+    /* We need to create a custom script containing our actual command
+     * since not every terminal emulator which is contained in
+     * i3-sensible-terminal supports -e with multiple arguments (and not
+     * all of them support -e with one quoted argument either).
+     *
+     * NB: The paths need to be unique, that is, don’t assume users close
+     * their nagbars at any point in time (and they still need to work).
+     * */
+    char *script_path = get_process_filename("nagbar-cmd");
+
+    int fd = open(script_path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+    if (fd == -1) {
+        warn("Could not create temporary script to store the nagbar command");
+        return;
+    }
+    FILE *script = fdopen(fd, "w");
+    if (script == NULL) {
+        warn("Could not fdopen() temporary script to store the nagbar command");
+        return;
+    }
+    fprintf(script, "#!/bin/sh\nrm %s\n%s", script_path, command);
+    /* Also closes fd */
+    fclose(script);
+
+    char *link_path;
+    char *exe_path = get_exe_path(argv0);
+    sasprintf(&link_path, "%s.nagbar_cmd", script_path);
+    if (symlink(exe_path, link_path) == -1) {
+        err(EXIT_FAILURE, "Failed to symlink %s to %s", link_path, exe_path);
+    }
+
+    char *terminal_cmd;
+    sasprintf(&terminal_cmd, "i3-sensible-terminal -e %s", link_path);
+    printf("argv0 = %s\n", argv0);
+    printf("terminal_cmd = %s\n", terminal_cmd);
+
+    start_application(terminal_cmd);
+
+    free(link_path);
+    free(terminal_cmd);
+    free(script_path);
+    free(exe_path);
+}
+
 static button_t *get_button_at(int16_t x, int16_t y) {
     for (int c = 0; c < buttoncnt; c++)
         if (x >= (buttons[c].x) && x <= (buttons[c].x + buttons[c].width))
@@ -149,51 +195,15 @@ static void handle_button_release(xcb_connection_t *conn, xcb_button_release_eve
     if (event->event_x >= btn_close.x && event->event_x < btn_close.x + btn_close.width)
         exit(0);
     button_t *button = get_button_at(event->event_x, event->event_y);
-    if (!button)
+    if (!button) {
-        return;
-
-    /* We need to create a custom script containing our actual command
-     * since not every terminal emulator which is contained in
-     * i3-sensible-terminal supports -e with multiple arguments (and not
-     * all of them support -e with one quoted argument either).
-     *
-     * NB: The paths need to be unique, that is, don’t assume users close
-     * their nagbars at any point in time (and they still need to work).
-     * */
-    char *script_path = get_process_filename("nagbar-cmd");
-
-    int fd = open(script_path, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
-    if (fd == -1) {
-        warn("Could not create temporary script to store the nagbar command");
         return;
     }
-    FILE *script = fdopen(fd, "w");
+
-    if (script == NULL) {
+    if (button->exec_in_terminal) {
-        warn("Could not fdopen() temporary script to store the nagbar command");
+        execute_in_terminal(button->action);
-        return;
+    } else {
+        start_application(button->action);
     }
-    fprintf(script, "#!/bin/sh\nrm %s\n%s", script_path, button->action);
-    /* Also closes fd */
-    fclose(script);
-
-    char *link_path;
-    char *exe_path = get_exe_path(argv0);
-    sasprintf(&link_path, "%s.nagbar_cmd", script_path);
-    if (symlink(exe_path, link_path) == -1) {
-        err(EXIT_FAILURE, "Failed to symlink %s to %s", link_path, exe_path);
-    }
-
-    char *terminal_cmd;
-    sasprintf(&terminal_cmd, "i3-sensible-terminal -e %s", link_path);
-    printf("argv0 = %s\n", argv0);
-    printf("terminal_cmd = %s\n", terminal_cmd);
-
-    start_application(terminal_cmd);
-
-    free(link_path);
-    free(terminal_cmd);
-    free(script_path);
-    free(exe_path);
 
     /* TODO: unset flag, re-render */
 }
@@ -358,12 +368,13 @@ int main(int argc, char *argv[]) {
         {"version", no_argument, 0, 'v'},
         {"font", required_argument, 0, 'f'},
         {"button", required_argument, 0, 'b'},
+        {"button-sh", required_argument, 0, 'B'},
         {"help", no_argument, 0, 'h'},
         {"message", required_argument, 0, 'm'},
         {"type", required_argument, 0, 't'},
         {0, 0, 0, 0}};
 
-    char *options_string = "b:f:m:t:vh";
+    char *options_string = "B:b:f:m:t:vh";
 
     prompt = i3string_from_utf8("Please do not run this program.");
 
@@ -385,15 +396,26 @@ int main(int argc, char *argv[]) {
                 break;
             case 'h':
                 printf("i3-nagbar " I3_VERSION "\n");
-                printf("i3-nagbar [-m <message>] [-b <button> <action>] [-t warning|error] [-f <font>] [-v]\n");
+                printf("i3-nagbar [-m <message>] [-b <button> <terminal-action>] "
+                       "[-B <button> <shell-action> [-t warning|error] [-f <font>] [-v]\n");
                 return 0;
+            /* falls through */
+            case 'B':
             case 'b':
                 buttons = srealloc(buttons, sizeof(button_t) * (buttoncnt + 1));
                 buttons[buttoncnt].label = i3string_from_utf8(optarg);
                 buttons[buttoncnt].action = argv[optind];
-                printf("button with label *%s* and action *%s*\n",
+                if (o == 'b') {
+                    buttons[buttoncnt].exec_in_terminal = true;
+                    printf("button with label *%s* and terminal action *%s*\n",
                            i3string_as_utf8(buttons[buttoncnt].label),
                            buttons[buttoncnt].action);
+                } else {
+                    buttons[buttoncnt].exec_in_terminal = false;
+                    printf("button with label *%s* and shell action *%s*\n",
+                           i3string_as_utf8(buttons[buttoncnt].label),
+                           buttons[buttoncnt].action);
+                }
                 buttoncnt++;
                 printf("now %d buttons\n", buttoncnt);
                 if (optind < argc)

man/i3-nagbar.man

@@ -9,7 +9,7 @@ i3-nagbar - displays an error bar on top of your screen
 
 == SYNOPSIS
 
-i3-nagbar [-m <message>] [-b <button> <action>] [-t warning|error] [-f <font>] [-v]
+i3-nagbar [-m <message>] [-b <button> <terminal-action>] [-B <button> <shell-action>] [-t warning|error] [-f <font>] [-v]
 
 == OPTIONS
 
@@ -29,9 +29,13 @@ Display 'message' as text on the left of the i3-nagbar.
 *-f, --font* 'font'::
 Select font that is being used.
 
-*-b, --button* 'button' 'action'::
+*-b, --button* 'button' 'terminal-action'::
-Create a button with text 'button'. The 'action' are the shell commands that
+Adds a button labelled 'button' to the bar. When pressed, the command given
-will be executed by this button. Multiple buttons can be defined.
+in 'terminal-action' is executed inside a terminal emulator, via i3-sensible-terminal(1).
+Multiple buttons can be defined.
+
+*-B, --button-sh* 'button' 'shell-action'::
+Same as *--button*, except that the command given in 'shell-action' is executed directly by the shell.
 
 == DESCRIPTION
 
@@ -49,7 +53,7 @@ i3-nagbar -m 'You have an error in your i3 config file!' \
 
 == SEE ALSO
 
-i3(1)
+i3(1), i3-sensible-terminal(1)
 
 == AUTHOR