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/*
Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
- Neither the name of The Numerical ALgorithms Group Ltd. nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "openaxiom-c-macros.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_PTY_H
# include <pty.h>
#endif
#ifdef HAVE_UTIL_H
# include <util.h>
#endif
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#endif
#ifdef HAVE_LIBUTIL_H
# include <sys/types.h>
# include <libutil.h>
#endif
#include "openpty.H1"
static void makeNextPtyNames(char * , char * );
/*
* The main function is ptyopen. It simply opens up both sides of a
* pseudo-terminal. It uses and saves the pathnames for
* the devices which were actually opened.
*
* If it fails it simply exits the program.
*
*
* ptyopen(controller, server, controllerPath, serverPath)
* int *controller; The file descriptor for controller side of the pty
* int *server; The file descriptor for the server side
* char *serverPath;
*
* The path name vars should be declared of size 11 or more
*/
int
ptyopen(int *controller,int * server,char * serverPath)
{
#if HAVE_DECL_OPENPTY
return openpty(controller,server, serverPath, NULL, NULL);
#else
#if defined(SUNplatform)
int looking = 1, i;
int oflag = O_RDWR; /* flag for opening the pty */
char controllerPath[128];
for (i = 0; looking && i < 1000; i++) {
makeNextPtyNames(controllerPath, serverPath);
if (access(controllerPath, 6) != 0) continue;
*controller = open(controllerPath, oflag, 0);
if (*controller >= 0) {
*server = open(serverPath, oflag, 0);
if (*server > 0)
looking = 0;
else
close(*controller);
}
}
if (looking) {
fprintf(stderr, "Couldn't find a free pty.\n");
exit(-1);
}
return (*controller);
#endif
#if defined(SUN4OS5platform)
extern int grantpt(int);
extern int unlockpt(int);
extern char* ptsname(int);
int fdm,fds;
char *slavename;
/* open master */
if ((fdm = open("/dev/ptmx", O_RDWR)) < 0 )
perror("ptyopen: Failed to open /dev/ptmx");
else {
/* change permission ofslave */
if (grantpt(fdm) < 0)
perror("ptyopen: Failed to grant access to slave device");
/* unlock slave */
if (unlockpt(fdm) < 0)
perror("ptyopen: Failed to unlock master/slave pair");
/* get name of slave */
if ((slavename = ptsname(fdm)) == NULL)
perror("ptyopen: Failed to get name of slave device");
/* open slave */
if ((fds = open(slavename, O_RDWR)) < 0 )
perror("ptyopen: Failed to open slave");
else {
#if defined(SUN4OS5platform)
/* push ptem */
if (ioctl(fds, I_PUSH, "ptem") < 0)
perror("ptyopen: Failed to push ptem");
/* push ldterm */
if (ioctl(fds, I_PUSH, "ldterm") < 0)
perror("ptyopen: Failed to push idterm");
#endif
strcpy(serverPath,slavename);
*controller=fdm;
*server=fds;
}
}
return(fdm);
#endif
# error "don't know how to open a pty"
#endif
}
static void
makeNextPtyNames(char *cont,char * serv)
{
#if defined(SUNplatform)
static int channelNo = 0;
static char group[] = "pqrstuvwxyzPQRST";
static int groupNo = 0;
sprintf(cont, "/dev/pty%c%x", group[groupNo], channelNo);
sprintf(serv, "/dev/tty%c%x", group[groupNo], channelNo);
channelNo++; /* try next */
if (channelNo == 16) { /* move to new group */
channelNo = 0;
groupNo++;
if (groupNo == 16) groupNo = 0; /* recycle */
}
#endif
}
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