82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
|
/* Standard include files. stdio.h is required. */
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
/* Used for select(2) */
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/select.h>
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
/* Standard readline include files. */
|
||
|
|
#include <readline/readline.h>
|
||
|
|
#include <readline/history.h>
|
||
|
|
|
||
|
|
static void cb_linehandler (char *);
|
||
|
|
|
||
|
|
int running;
|
||
|
|
const char *prompt = "rltest$ ";
|
||
|
|
|
||
|
|
/* Callback function called for each line when accept-line executed, EOF
|
||
|
|
seen, or EOF character read. This sets a flag and returns; it could
|
||
|
|
also call exit(3). */
|
||
|
|
static void
|
||
|
|
cb_linehandler (char *line)
|
||
|
|
{
|
||
|
|
/* Can use ^D (stty eof) or `exit' to exit. */
|
||
|
|
if (line == NULL || strcmp (line, "exit") == 0)
|
||
|
|
{
|
||
|
|
if (line == 0)
|
||
|
|
printf ("\n");
|
||
|
|
printf ("exit\n");
|
||
|
|
/* This function needs to be called to reset the terminal settings,
|
||
|
|
and calling it from the line handler keeps one extra prompt from
|
||
|
|
being displayed. */
|
||
|
|
rl_callback_handler_remove ();
|
||
|
|
|
||
|
|
running = 0;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (*line)
|
||
|
|
add_history (line);
|
||
|
|
printf ("input line: %s\n", line);
|
||
|
|
free (line);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
main (int c, char **v)
|
||
|
|
{
|
||
|
|
fd_set fds;
|
||
|
|
int r;
|
||
|
|
|
||
|
|
/* Install the line handler. */
|
||
|
|
rl_callback_handler_install (prompt, cb_linehandler);
|
||
|
|
|
||
|
|
/* Enter a simple event loop. This waits until something is available
|
||
|
|
to read on readline's input stream (defaults to standard input) and
|
||
|
|
calls the builtin character read callback to read it. It does not
|
||
|
|
have to modify the user's terminal settings. */
|
||
|
|
running = 1;
|
||
|
|
while (running)
|
||
|
|
{
|
||
|
|
FD_ZERO (&fds);
|
||
|
|
FD_SET (fileno (rl_instream), &fds);
|
||
|
|
|
||
|
|
r = select (FD_SETSIZE, &fds, NULL, NULL, NULL);
|
||
|
|
if (r < 0)
|
||
|
|
{
|
||
|
|
perror ("rltest: select");
|
||
|
|
rl_callback_handler_remove ();
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (FD_ISSET (fileno (rl_instream), &fds))
|
||
|
|
rl_callback_read_char ();
|
||
|
|
}
|
||
|
|
|
||
|
|
printf ("rltest: Event loop has exited\n");
|
||
|
|
return 0;
|
||
|
|
}
|