This changes the i9e subsystem to operate in single key mode while
a command is running as determined by the existence of a buffer tree
node which is attached to the stdout_btrn of i9e.
In single key mode a different readline key map is activated and
single keystrokes are passed to the application via the new key
handler function pointer of struct i9e_client_info.
bool input_eof;
bool caught_sigint;
bool caught_sigterm;
bool input_eof;
bool caught_sigint;
bool caught_sigterm;
+ Keymap standard_km;
+ Keymap bare_km;
};
static struct i9e_private i9e_private, *i9ep = &i9e_private;
};
static struct i9e_private i9e_private, *i9ep = &i9e_private;
btr_remove_node(&i9ep->stdout_btrn);
i9ep->stdout_btrn = btr_new_node(&(struct btr_node_description)
EMBRACE(.name = "interactive_stdout", .parent = producer));
btr_remove_node(&i9ep->stdout_btrn);
i9ep->stdout_btrn = btr_new_node(&(struct btr_node_description)
EMBRACE(.name = "interactive_stdout", .parent = producer));
+ rl_set_keymap(i9ep->bare_km);
}
static void wipe_bottom_line(void)
}
static void wipe_bottom_line(void)
fprintf(i9ep->stderr_stream, "\r");
}
fprintf(i9ep->stderr_stream, "\r");
}
+/**
+ * Free all storage associated with a keymap.
+ *
+ * This function is not declared in the readline headers although the symbol is
+ * exported and the function is documented in the readline info file. So we
+ * have to declare it here.
+ *
+ * \param keymap The keymap to deallocate.
+ */
+void rl_free_keymap(Keymap keymap);
+
/**
* Reset the terminal and save the in-memory command line history.
*
/**
* Reset the terminal and save the in-memory command line history.
*
{
char *hf = i9ep->ici->history_file;
{
char *hf = i9ep->ici->history_file;
+ rl_free_keymap(i9ep->bare_km);
+ rl_callback_handler_remove();
if (hf)
write_history(hf);
wipe_bottom_line();
if (hf)
write_history(hf);
wipe_bottom_line();
-static void i9e_input(void)
-{
- do {
- rl_callback_read_char();
- } while (input_available());
-}
-
-static void i9e_post_select(struct sched *s, struct task *t)
+static void i9e_post_select(__a_unused struct sched *s, struct task *t)
- struct btr_node *btrn = i9ep->stdout_btrn;
struct i9e_client_info *ici = i9ep->ici;
char *buf;
size_t sz;
struct i9e_client_info *ici = i9ep->ici;
char *buf;
size_t sz;
ret = -E_I9E_TERM_RQ;
if (i9ep->caught_sigterm)
goto rm_btrn;
ret = -E_I9E_TERM_RQ;
if (i9ep->caught_sigterm)
goto rm_btrn;
- if (!btrn) {
- i9ep->caught_sigint = false;
- if (FD_ISSET(ici->fds[0], &s->rfds))
- i9e_input();
- return;
- }
ret = 0;
if (i9ep->caught_sigint)
goto rm_btrn;
ret = 0;
if (i9ep->caught_sigint)
goto rm_btrn;
+ while (input_available())
+ rl_callback_read_char();
+ if (!i9ep->stdout_btrn)
+ goto out;
ret = btr_node_status(i9ep->stdout_btrn, 0, BTR_NT_LEAF);
ret = btr_node_status(i9ep->stdout_btrn, 0, BTR_NT_LEAF);
+ if (ret < 0) {
+ ret = 0;
- sz = btr_next_buffer(btrn, &buf);
+ }
+ if (ret == 0)
+ goto out;
+ sz = btr_next_buffer(i9ep->stdout_btrn, &buf);
if (sz == 0)
goto out;
ret = xwrite(ici->fds[1], buf, sz);
if (ret < 0)
goto rm_btrn;
if (sz == 0)
goto out;
ret = xwrite(ici->fds[1], buf, sz);
if (ret < 0)
goto rm_btrn;
- btr_consume(btrn, ret);
+ btr_consume(i9ep->stdout_btrn, ret);
- btr_remove_node(&i9ep->stdout_btrn);
- rl_set_prompt(i9ep->ici->prompt);
- rl_redisplay();
+ if (i9ep->stdout_btrn) {
+ btr_remove_node(&i9ep->stdout_btrn);
+ rl_set_keymap(i9ep->standard_km);
+ rl_set_prompt(i9ep->ici->prompt);
+ rl_redisplay();
+ }
+ if (ret < 0)
+ wipe_bottom_line();
+ i9ep->caught_sigint = false;
+ t->error = ret;
}
static void i9e_pre_select(struct sched *s, __a_unused struct task *t)
}
static void i9e_pre_select(struct sched *s, __a_unused struct task *t)
i9ep->empty_line[i9ep->num_columns] = '\0';
}
i9ep->empty_line[i9ep->num_columns] = '\0';
}
+/**
+ * Defined key sequences are mapped to keys starting with this offset. I.e.
+ * pressing the first defined key sequence yields the key number \p KEY_OFFSET.
+ */
+#define KEY_OFFSET 64
+
+static int dispatch_key(__a_unused int count, int key)
+{
+ int ret;
+
+ assert(key >= KEY_OFFSET);
+ ret = i9ep->ici->key_handler(key - KEY_OFFSET);
+ return ret < 0? ret : 0;
+}
+
/**
* Register the i9e task and initialize readline.
*
/**
* Register the i9e task and initialize readline.
*
i9ep->stderr_stream = fdopen(ici->fds[2], "w");
setvbuf(i9ep->stderr_stream, NULL, _IONBF, 0);
i9ep->stderr_stream = fdopen(ici->fds[2], "w");
setvbuf(i9ep->stderr_stream, NULL, _IONBF, 0);
+ i9ep->standard_km = rl_get_keymap();
+ i9ep->bare_km = rl_make_bare_keymap();
+ if (ici->bound_keyseqs) {
+ char *seq;
+ int i;
+ /* FIXME: This is an arbitrary constant. */
+ for (i = 0; i < 32 && (seq = ici->bound_keyseqs[i]); i++) {
+ char buf[2] = {KEY_OFFSET + i, '\0'};
+ /* readline needs an allocated buffer for the macro */
+ rl_generic_bind(ISMACR, seq, para_strdup(buf), i9ep->bare_km);
+ rl_bind_key_in_map(KEY_OFFSET + i, dispatch_key, i9ep->bare_km);
+ }
+ }
if (ici->history_file)
read_history(ici->history_file);
update_winsize();
if (ici->producer) {
rl_callback_handler_install("", i9e_line_handler);
i9e_attach_to_stdout(ici->producer);
if (ici->history_file)
read_history(ici->history_file);
update_winsize();
if (ici->producer) {
rl_callback_handler_install("", i9e_line_handler);
i9e_attach_to_stdout(ici->producer);
+ rl_set_keymap(i9ep->bare_km);
} else
rl_callback_handler_install(i9ep->ici->prompt, i9e_line_handler);
return 1;
} else
rl_callback_handler_install(i9ep->ici->prompt, i9e_line_handler);
return 1;
int loglevel;
/** Complete input lines are passed to this callback function. */
int (*line_handler)(char *line);
int loglevel;
/** Complete input lines are passed to this callback function. */
int (*line_handler)(char *line);
+ /** In single key mode, this callback is executed instead. */
+ int (*key_handler)(int key);
+ /** The array of valid key sequences for libreadline. */
+ char **bound_keyseqs;
/** File descriptors to use for input/output/log. */
int fds[3];
/** Text of the current prompt. */
/** File descriptors to use for input/output/log. */
int fds[3];
/** Text of the current prompt. */