Improve CTRL+D handling, now redisplay the prompt and command if the cursor is not home

FIX.md

@@ -7,3 +7,4 @@
 - [ ] All AFL crashes
 - [ ] Fix CTRL+E and ->
 - [ ] Multi line editing
+- [ ] Foreach in if

src/readline.c

@@ -50,10 +50,8 @@ bool append_null_terminator(buff_t *out)
         return true;
     if (!ensure_buff_av_capacity(out, 1))
         return false;
-    U_DEBUG("buff sz: %zu\n", out->sz);
     if (out->str[out->sz - 1] == '\n')
         out->sz--;
-    U_DEBUG("readline [%.*s]\n", (int)out->sz, out->str);
     out->str[out->sz] = '\0';
     out->sz++;
     return true;
@@ -157,7 +155,6 @@ bool read_until_line_ending(
             return false;
         if (!populate_copy_buff(rh, rd, &tpi))
             return true;
-        U_DEBUG("copied %zu chars to cpy (%zu used)\n", tpi.written, tpi.used);
         memmove(rh->in, &rh->in[tpi.used], BULK_READ_BUFF_SZ - tpi.used);
         memset(&rh->in[BULK_READ_BUFF_SZ - tpi.used], '\0', tpi.used);
         if (rh->cpy[tpi.written - 1] == '\n')
@@ -165,7 +162,6 @@ bool read_until_line_ending(
         rd = read(ec->read_fd, rh->in, BULK_READ_BUFF_SZ);
         if (rd <= 0)
             return (rd == 0);
-        U_DEBUG("read %zu characters\n", rd);
     }
     return true;
 }
@@ -180,7 +176,6 @@ bool readline(exec_ctx_t *ec, buff_t *out)
 
     for (size_t i = 0; i < sizeof read_buff; i++)
         is_empty &= read_buff[i] == '\0';
-    U_DEBUG("readline buff is empty? %d\n", is_empty);
     if (is_empty) {
         rd = read(ec->read_fd, read_buff, sizeof read_buff);
         if (rd < 0)

src/repl/key_arrow.c

@@ -8,7 +8,6 @@
 #include <string.h>
 #include <unistd.h>
 
-#include "debug.h"
 #include "key_handler.h"
 #include "readline.h"
 #include "u_str.h"
@@ -71,7 +70,6 @@ bool handle_key_arrow_left(
         rh->cursor--;
         refresh_line(rh);
     }
-    U_DEBUG("Key [LEFT] cursor [%zd]\n", rh->cursor);
     return false;
 }
 
@@ -82,6 +80,5 @@ bool handle_key_arrow_right(
         rh->cursor++;
         refresh_line(rh);
     }
-    U_DEBUG("Key [RIGHT] cursor [%zd]\n", rh->cursor);
     return false;
 }

src/repl/key_control.c

@@ -21,8 +21,14 @@ bool handle_key_ctrl_c(readline_helper_t *rh, exec_ctx_t *ec, buff_t *buff)
     return false;
 }
 
-bool handle_key_ctrl_d(readline_helper_t *, exec_ctx_t *ec, buff_t *buff)
+bool handle_key_ctrl_d(readline_helper_t *rh, exec_ctx_t *ec, buff_t *buff)
 {
+    if (rh->cursor) {
+        WRITE_CONST(STDOUT_FILENO, "\n");
+        print_shell_prompt(ec);
+        refresh_line(rh);
+        return false;
+    }
     if (ec->ignoreof)
         return false;
     buff->sz = 0;
@@ -39,7 +45,7 @@ bool handle_key_ctrl_l(readline_helper_t *, exec_ctx_t *ec, buff_t *)
 
 bool handle_backspace(readline_helper_t *rh, exec_ctx_t *, buff_t *buff)
 {
-    if (rh->cursor == 0)
+    if (!rh->cursor || !buff->sz)
         return false;
     rh->cursor--;
     memmove(&buff->str[rh->cursor], &buff->str[rh->cursor + 1],

src/repl/repl.c

@@ -107,7 +107,6 @@ ssize_t handle_keys(
     char const *read_buff,
     size_t len)
 {
-    U_DEBUG("Found special char, [%hhx]\n", *read_buff);
     for (size_t i = 0; i < sizeof KEY_HANDLERS / sizeof *KEY_HANDLERS; i++) {
         if (strncmp(read_buff, KEY_HANDLERS[i].name,
                 strlen(KEY_HANDLERS[i].name)) != 0)