5836a818ec
This reverts commitb558ff043d. This reverts commit4a11f20659. The initial import commit failed to retain local changes made to readline's configure.in (and the commit message erroneously stated that there were no local changes that needed to be reapplied). Also the import caused a couple of build errors and a scattering of testsuite regressions throughout many arches. It's probably better to start over with this import, hopefully more carefully next time.
337 lines
6.4 KiB
C
337 lines
6.4 KiB
C
/*
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*
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* Another test harness for the readline callback interface.
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*
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* Author: Bob Rossi <bob@brasko.net>
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*/
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#if defined (HAVE_CONFIG_H)
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <curses.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#if 0 /* LINUX */
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#include <pty.h>
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#else
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#include <util.h>
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#endif
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#ifdef READLINE_LIBRARY
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# include "readline.h"
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#else
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# include <readline/readline.h>
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#endif
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/**
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* Master/Slave PTY used to keep readline off of stdin/stdout.
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*/
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static int masterfd = -1;
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static int slavefd;
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void
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sigint (s)
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int s;
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{
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tty_reset (STDIN_FILENO);
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close (masterfd);
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close (slavefd);
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printf ("\n");
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exit (0);
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}
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static int
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user_input()
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{
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int size;
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const int MAX = 1024;
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char *buf = (char *)malloc(MAX+1);
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size = read (STDIN_FILENO, buf, MAX);
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if (size == -1)
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return -1;
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size = write (masterfd, buf, size);
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if (size == -1)
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return -1;
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return 0;
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}
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static int
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readline_input()
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{
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const int MAX = 1024;
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char *buf = (char *)malloc(MAX+1);
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int size;
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size = read (masterfd, buf, MAX);
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if (size == -1)
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{
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free( buf );
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buf = NULL;
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return -1;
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}
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buf[size] = 0;
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/* Display output from readline */
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if ( size > 0 )
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fprintf(stderr, "%s", buf);
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free( buf );
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buf = NULL;
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return 0;
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}
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static void
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rlctx_send_user_command(char *line)
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{
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/* This happens when rl_callback_read_char gets EOF */
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if ( line == NULL )
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return;
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if (strcmp (line, "exit") == 0) {
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tty_reset (STDIN_FILENO);
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close (masterfd);
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close (slavefd);
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printf ("\n");
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exit (0);
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}
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/* Don't add the enter command */
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if ( line && *line != '\0' )
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add_history(line);
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}
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static void
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custom_deprep_term_function ()
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{
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}
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static int
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init_readline (int inputfd, int outputfd)
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{
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FILE *inputFILE, *outputFILE;
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inputFILE = fdopen (inputfd, "r");
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if (!inputFILE)
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return -1;
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outputFILE = fdopen (outputfd, "w");
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if (!outputFILE)
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return -1;
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rl_instream = inputFILE;
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rl_outstream = outputFILE;
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/* Tell readline what the prompt is if it needs to put it back */
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rl_callback_handler_install("(rltest): ", rlctx_send_user_command);
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/* Set the terminal type to dumb so the output of readline can be
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* understood by tgdb */
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if ( rl_reset_terminal("dumb") == -1 )
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return -1;
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/* For some reason, readline can not deprep the terminal.
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* However, it doesn't matter because no other application is working on
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* the terminal besides readline */
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rl_deprep_term_function = custom_deprep_term_function;
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using_history();
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read_history(".history");
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return 0;
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}
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static int
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main_loop(void)
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{
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fd_set rset;
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int max;
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max = (masterfd > STDIN_FILENO) ? masterfd : STDIN_FILENO;
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max = (max > slavefd) ? max : slavefd;
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for (;;)
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{
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/* Reset the fd_set, and watch for input from GDB or stdin */
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FD_ZERO(&rset);
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FD_SET(STDIN_FILENO, &rset);
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FD_SET(slavefd, &rset);
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FD_SET(masterfd, &rset);
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/* Wait for input */
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if (select(max + 1, &rset, NULL, NULL, NULL) == -1)
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{
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if (errno == EINTR)
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continue;
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else
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return -1;
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}
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/* Input received through the pty: Handle it
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* Wrote to masterfd, slave fd has that input, alert readline to read it.
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*/
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if (FD_ISSET(slavefd, &rset))
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rl_callback_read_char();
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/* Input received through the pty.
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* Readline read from slavefd, and it wrote to the masterfd.
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*/
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if (FD_ISSET(masterfd, &rset))
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if ( readline_input() == -1 )
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return -1;
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/* Input received: Handle it, write to masterfd (input to readline) */
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if (FD_ISSET(STDIN_FILENO, &rset))
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if ( user_input() == -1 )
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return -1;
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}
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return 0;
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}
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/* The terminal attributes before calling tty_cbreak */
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static struct termios save_termios;
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static struct winsize size;
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static enum { RESET, TCBREAK } ttystate = RESET;
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/* tty_cbreak: Sets terminal to cbreak mode. Also known as noncanonical mode.
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* 1. Signal handling is still turned on, so the user can still type those.
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* 2. echo is off
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* 3. Read in one char at a time.
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*
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* fd - The file descriptor of the terminal
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*
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* Returns: 0 on sucess, -1 on error
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*/
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int tty_cbreak(int fd){
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struct termios buf;
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int ttysavefd = -1;
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if(tcgetattr(fd, &save_termios) < 0)
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return -1;
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buf = save_termios;
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buf.c_lflag &= ~(ECHO | ICANON);
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buf.c_iflag &= ~(ICRNL | INLCR);
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buf.c_cc[VMIN] = 1;
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buf.c_cc[VTIME] = 0;
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#if defined (VLNEXT) && defined (_POSIX_VDISABLE)
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buf.c_cc[VLNEXT] = _POSIX_VDISABLE;
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#endif
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#if defined (VDSUSP) && defined (_POSIX_VDISABLE)
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buf.c_cc[VDSUSP] = _POSIX_VDISABLE;
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#endif
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/* enable flow control; only stty start char can restart output */
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#if 0
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buf.c_iflag |= (IXON|IXOFF);
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#ifdef IXANY
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buf.c_iflag &= ~IXANY;
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#endif
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#endif
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/* disable flow control; let ^S and ^Q through to pty */
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buf.c_iflag &= ~(IXON|IXOFF);
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#ifdef IXANY
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buf.c_iflag &= ~IXANY;
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#endif
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if(tcsetattr(fd, TCSAFLUSH, &buf) < 0)
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return -1;
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ttystate = TCBREAK;
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ttysavefd = fd;
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/* set size */
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if(ioctl(fd, TIOCGWINSZ, (char *)&size) < 0)
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return -1;
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#ifdef DEBUG
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err_msg("%d rows and %d cols\n", size.ws_row, size.ws_col);
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#endif
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return (0);
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}
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int
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tty_off_xon_xoff (int fd)
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{
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struct termios buf;
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int ttysavefd = -1;
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if(tcgetattr(fd, &buf) < 0)
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return -1;
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buf.c_iflag &= ~(IXON|IXOFF);
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if(tcsetattr(fd, TCSAFLUSH, &buf) < 0)
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return -1;
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return 0;
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}
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/* tty_reset: Sets the terminal attributes back to their previous state.
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* PRE: tty_cbreak must have already been called.
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*
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* fd - The file descrioptor of the terminal to reset.
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*
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* Returns: 0 on success, -1 on error
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*/
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int tty_reset(int fd)
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{
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if(ttystate != TCBREAK)
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return (0);
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if(tcsetattr(fd, TCSAFLUSH, &save_termios) < 0)
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return (-1);
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ttystate = RESET;
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return 0;
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}
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int
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main()
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{
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int val;
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val = openpty (&masterfd, &slavefd, NULL, NULL, NULL);
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if (val == -1)
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return -1;
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val = tty_off_xon_xoff (masterfd);
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if (val == -1)
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return -1;
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val = init_readline (slavefd, slavefd);
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if (val == -1)
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return -1;
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val = tty_cbreak (STDIN_FILENO);
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if (val == -1)
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return -1;
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signal (SIGINT, sigint);
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val = main_loop ();
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tty_reset (STDIN_FILENO);
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if (val == -1)
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return -1;
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return 0;
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}
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