From 191b3e0d8b8ee26f072de9718000ca1d37aaabad Mon Sep 17 00:00:00 2001
From: anon <anon@anon.anon>
Date: Tue, 6 Aug 2024 19:33:46 +0200
Subject: [PATCH] --execute

---
 .gitignore            |  2 ++
 documentation/TODO.md |  1 -
 source/argument_yy.y  |  4 +++-
 source/cli.cpp        |  3 +++
 source/main.cpp       | 30 +++++++++++++++++++++++++-----
 source/tui.cpp        |  3 +--
 6 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/.gitignore b/.gitignore
index ff42fac..2a2134f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 histui
+.gdb_history
 object/
+*.out
diff --git a/documentation/TODO.md b/documentation/TODO.md
index 4b65059..831f129 100644
--- a/documentation/TODO.md
+++ b/documentation/TODO.md
@@ -1,5 +1,4 @@
 + make (potentially slow) queries cancel using multi threading
-+ instant run mode
 + scroll lags
 + technical dept in tui.cpp
 + migrate to C
diff --git a/source/argument_yy.y b/source/argument_yy.y
index f277c19..e5559d9 100644
--- a/source/argument_yy.y
+++ b/source/argument_yy.y
@@ -1,9 +1,10 @@
-%token HELP VERSION
+%token HELP VERSION EXECUTE
 %token TUI ENABLE
 %token LEVENSTEIN CASELESS
 %{
     #include "cli.hpp"
     #include "storage.hpp"
+    extern bool do_execute;
 %}
 %%
 histui_args: global_args verb_and_args
@@ -19,6 +20,7 @@ verb_and_args: ENABLE   { enable(); exit(0); }
     ;
 
 tui_args: %empty
+    | EXECUTE    tui_args { do_execute    = true; }
     | LEVENSTEIN tui_args { is_levenstein = true; }
     | CASELESS   tui_args { is_caseless   = true; }
     ;
diff --git a/source/cli.cpp b/source/cli.cpp
index ad0d735..17746c9 100644
--- a/source/cli.cpp
+++ b/source/cli.cpp
@@ -92,6 +92,9 @@ void parse_arguments(const int argc, const char * const * const argv) {
         if (!strcmp(argv[i], "enable")) {
             tokens[token_empty_head++] = ENABLE;
         } else
+        if (!strcmp(argv[i], "--execute")) {
+            tokens[token_empty_head++] = EXECUTE;
+        } else
         if (!strcmp(argv[i], "--levenstein")) {
             tokens[token_empty_head++] = LEVENSTEIN;
         } else
diff --git a/source/main.cpp b/source/main.cpp
index 28518bb..3649ba3 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -1,10 +1,12 @@
 #include <locale.h>
+#include <sys/ioctl.h>
 #include "cli.hpp"
 #include "bash_history.yy.hpp"
 #include "storage.hpp"
 #include "tui.hpp"
 
 bool do_run = true;
+bool do_execute = false;
 
 void init(void);
 void deinit(void);
@@ -38,11 +40,29 @@ void deinit(void) {
 }
 
 void export_result(const char * const result) {
-    int fd[2];
-    pipe(fd);
-    dprintf(3, result);
-    close(fd[0]);
-    close(fd[1]);
+    if (do_execute) {
+        /* Inject the command and a newline to STDIN directly.
+         * Some systems could theoretically be configured to disallow it.
+         *  Not my problem.
+         */
+        for (size_t i = 0; i < strlen(result); i++) {
+            if (ioctl(STDIN_FILENO, TIOCSTI, &result[i]) == -1) {
+                perror("ioctl TIOCSTI");
+            }
+        }
+        const char newline = '\n';
+        ioctl(STDIN_FILENO, TIOCSTI, &newline);
+    } else {
+        /* Copy to a 3th pipe file descriptor which we can
+         *  scoop up from a file and copy with READLINE_LINE.
+         * XXX: if anyone knows a better method, please tell me
+         */
+        int fd[2];
+        pipe(fd);
+        dprintf(3, result);
+        close(fd[0]);
+        close(fd[1]);
+    }
 }
 
 signed main(const int argc, const char * const * const argv) {
diff --git a/source/tui.cpp b/source/tui.cpp
index aadaf6d..87a9caf 100644
--- a/source/tui.cpp
+++ b/source/tui.cpp
@@ -4,8 +4,6 @@
 #include <ncurses.h>
 #include <readline/readline.h>
 
-extern bool do_run;
-
 size_t entry_lines;
 bool is_input_changed = true;
 
@@ -127,6 +125,7 @@ void tui_refresh(void) {
 
 
 void tui_take_input(void) {
+    extern bool do_run;
     const size_t paging_size = entry_lines / 2;
 
 	input = wgetch(stdscr);