mirror of
https://github.com/rn10950/RetroZilla.git
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374 lines
9.1 KiB
C
374 lines
9.1 KiB
C
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is lineterm.
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*
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* The Initial Developer of the Original Code is
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* Ramalingam Saravanan.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* ptytest.c: Test driver for ptystream.c
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* CPP options:
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* LINUX: for Linux2.0/glibc
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* SOLARIS: for Solaris2.6
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*/
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#include <stdio.h>
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#include <termios.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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#ifdef SOLARIS
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#include <stropts.h>
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#include <poll.h>
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#endif
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#if defined(LINUX) || defined(BSDFAMILY)
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#endif
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#include "ptystream.h"
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static struct termios tios; /* TERMIOS structure */
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void pipeTest(int argc, char *argv[]);
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void ptyTest(int argc, char *argv[]);
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int echofd = -1;
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int main(int argc, char *argv[]) {
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if (argc < 4) {
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fprintf(stderr, "Usage: %s pty|pipe <echo-tty-name>|'' <shell-path> ...\n",
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argv[0]);
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exit(-1);
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}
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/* Get terminal attributes */
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if (tcgetattr(0, &tios) == -1) {
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fprintf(stderr, "Failed to get TTY attributes\n");
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exit(-1);
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}
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/* Disable signals, canonical mode processing, and echo */
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tios.c_lflag &= ~(ISIG | ICANON | ECHO );
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/* set MIN=1 and TIME=0 */
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tios.c_cc[VMIN] = 1;
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tios.c_cc[VTIME] = 0;
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/* Set terminal attributes */
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if (tcsetattr(0, TCSAFLUSH, &tios) == -1) {
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fprintf(stderr, "Failed to set TTY attributes\n");
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exit(-1);
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}
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if (*argv[2]) {
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/* Open TTY for echoing */
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if ( (echofd = open(argv[2], O_WRONLY)) == -1)
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perror("ptytest");
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fprintf(stderr, "Echoing %s output to %s\n", argv[1], argv[2]);
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write( echofd, "Echoing PTYTEST output ...\n", 27);
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}
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fprintf(stderr, "Type Control-] to terminate input\n");
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if (strcmp(argv[1],"pipe") == 0) {
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pipeTest(argc-3, argv+3);
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} else {
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ptyTest(argc-3, argv+3);
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}
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if (echofd >= 0) close(echofd);
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exit(0);
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}
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/* sends raw terminal input/output to a shell through a pseudo-TTY */
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void ptyTest(int argc, char *argv[])
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{
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struct pollfd pollFD[2];
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nfds_t nfds = 2;
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struct ptys ptyStruc;
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unsigned char ch;
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int ptyFD, pollCode;
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ssize_t n_read, n_written;
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char temstr[3] = "^@";
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/* Create a PTY */
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if (pty_create(&ptyStruc,argv,24,80,0,0,
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-1,0,0,0,1) == -1) {
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fprintf(stderr, "PTY creation failed\n");
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exit(-1);
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}
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ptyFD = ptyStruc.ptyFD;
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/* fprintf(stderr, "Polling for input on fd=0 (%s) and fd=%d\n",
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ttyname(0), ptyFD ); */
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/* Set up polling to read from parent STDIN and child STDOUT */
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pollFD[0].fd = 0;
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pollFD[0].events = POLLIN;
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pollFD[1].fd = ptyFD;
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pollFD[1].events = POLLIN;
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while ( (pollCode=poll(pollFD,nfds,-1)) >= 0) {
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if (pollCode == 0) continue;
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pollCode = 0;
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if (pollFD[0].revents != 0) {
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/* Read character from parent STDIN and write to child STDIN */
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ch = getchar();
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/* Exit poll loop if a Control-] character is read */
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if (ch == 0x1D) {
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fprintf(stderr, "EXIT ptytest\n");
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break;
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}
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if (write(ptyFD, &ch, 1) != 1) {
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fprintf(stderr, "Error in writing to child STDIN\n");
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exit(-1);
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}
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}
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if (pollFD[1].revents != 0) {
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/* Read character from child STDOUT and write to parent STDOUT */
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if ( (n_read=read(ptyFD, &ch, 1)) < 0) {
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fprintf(stderr, "Error in reading from child STDOUT\n");
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if (echofd >= 0) close(echofd);
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exit(-1);
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}
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if (n_read == 0) { /* End of file */
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if (echofd >= 0) close(echofd);
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exit(0);
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}
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if (echofd >= 0) {
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/* Echo output to another TTY */
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if (ch == 0x7F) {
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write(echofd, "\\DEL", 4);
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} else if (ch == 0x1B) {
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write(echofd, "\\ESC", 4);
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} else if (ch < 0x20) {
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temstr[1]= ch+'@';
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write(echofd, temstr, 2);
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} else {
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write(echofd, &ch, 1);
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}
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}
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if (write(1, &ch, 1) != 1) {
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fprintf(stderr, "Error in writing to parent STDOUT\n");
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exit(-1);
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}
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/*
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if (ioctl(1, I_FLUSH, FLUSHRW) == -1) {
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fprintf(stderr, "Error return from ioctl\n");
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exit(-1);
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}
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*/
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}
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}
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if (pollCode != 0) {
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fprintf(stderr, "Error return from poll\n");
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exit(-1);
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}
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/* Close PTY */
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pty_close(&ptyStruc);
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}
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/* sends raw terminal input/output to a shell through a pipe */
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void pipeTest(int argc, char *argv[])
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{
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struct pollfd pollFD[2];
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nfds_t nfds = 2;
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pid_t child_pid = -1; /* child process id */
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unsigned char ch;
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int pipeFD[2], pipeIN, pipeOUT, procIN, procOUT;
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int pollCode;
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ssize_t n_read, n_written;
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char temstr[3] = "^@";
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/* Create process input pipe (assumed unidirectional) */
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if (pipe(pipeFD) == -1) {
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fprintf(stderr, "Input pipe creation failed\n");
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exit(-1);
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}
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#ifdef DEBUG
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fprintf(stderr,"Created input pipe: %d %d\n", pipeFD[0], pipeFD[1]);
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#endif
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procIN = pipeFD[0];
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pipeIN = pipeFD[1];
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/* Create process output pipe (assumed unidirectional) */
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if (pipe(pipeFD) == -1) {
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fprintf(stderr, "Output pipe creation failed\n");
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exit(-1);
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}
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#ifdef DEBUG
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fprintf(stderr,"Created output pipe: %d %d\n", pipeFD[0], pipeFD[1]);
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#endif
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pipeOUT = pipeFD[0];
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procOUT = pipeFD[1];
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/* Fork a child process */
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child_pid = fork();
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if (child_pid < 0) {
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fprintf(stderr, "Fork failed\n");
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exit(-1);
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}
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#ifdef DEBUG
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fprintf(stderr, "Fork child process %d\n", child_pid);
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#endif
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if (child_pid == 0) {
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/* Child process */
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if (dup2(procIN, 0) == -1) {
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fprintf(stderr, "Dup2 failed for stdin of child\n");
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exit(-1);
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}
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if (dup2(procOUT, 1) == -1) {
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fprintf(stderr, "Dup2 failed for stdout of child\n");
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exit(-1);
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}
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execvp(argv[0], argv);
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fprintf(stderr, "Exec failed for command %s\n", argv[0]);
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exit(-1);
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}
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/* Set up polling to read from parent STDIN and child STDOUT */
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pollFD[0].fd = 0;
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pollFD[0].events = POLLIN;
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pollFD[1].fd = pipeOUT;
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pollFD[1].events = POLLIN;
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while ( (pollCode=poll(pollFD,nfds,-1)) >= 0) {
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if (pollFD[0].revents != 0) {
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/* Read character from parent STDIN and write to child STDIN */
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ch = getchar();
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/* Exit poll loop if a Control-] is read */
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if (ch == 0x1D) break;
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if (write(pipeIN, &ch, 1) != 1) {
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fprintf(stderr, "Error in writing to child STDIN\n");
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exit(-1);
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}
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}
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if (pollFD[1].revents != 0) {
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/* Read character from child STDOUT and write to parent STDOUT */
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if ( (n_read=read(pipeOUT, &ch, 1)) < 0) {
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fprintf(stderr, "Error in reading from child STDOUT\n");
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if (echofd >= 0) close(echofd);
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exit(-1);
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}
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if (n_read == 0) { /* End of file */
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if (echofd >= 0) close(echofd);
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exit(0);
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}
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if (echofd >= 0) {
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/* Echo output to another TTY */
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if (ch == 0x7F) {
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write(echofd, "\\DEL", 4);
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} else if (ch == 0x1B) {
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write(echofd, "\\ESC", 4);
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} else if (ch < 0x20) {
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temstr[1]= ch+'@';
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write(echofd, temstr, 2);
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} else {
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write(echofd, &ch, 1);
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}
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}
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if (write(1, &ch, 1) != 1) {
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fprintf(stderr, "Error in writing to parent STDOUT\n");
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exit(-1);
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}
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/*
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if (ioctl(1, I_FLUSH, FLUSHRW) == -1) {
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fprintf(stderr, "Error return from ioctl\n");
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exit(-1);
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}
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*/
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}
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}
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if (kill(child_pid, SIGKILL) == -1) {
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fprintf(stderr, "Error return from kill\n");
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exit(-1);
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}
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if (pollCode != 0) {
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fprintf(stderr, "Error return from poll\n");
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exit(-1);
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}
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/* Close pipes (assumed unidirectional) */
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close(pipeIN);
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close(pipeOUT);
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close(procIN);
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close(procOUT);
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}
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