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