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#define _XOPEN_SOURCE 500
#define __EXTENSIONS__
#define _GNU_SOURCE
#include "config.h"
#include <fcntl.h>
#include <limits.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#endif
#include <unistd.h>
#ifdef HAVE_GRANTPT
# ifdef HAVE_STROPTS_H
# include <stropts.h>
# endif
#endif
#ifdef HAVE_FORKPTY
# ifdef HAVE_PTY_H
# include <pty.h>
# endif
# ifdef HAVE_LIBUTIL_H
# include <libutil.h>
# endif
# ifdef HAVE_UTIL_H
# include <util.h>
# endif
#endif
extern void syserr(char *msg, ...);
#ifndef HAVE_FORKPTY
# if !(defined(HAVE__GETPTY) || defined(HAVE_GRANTPT) && (defined(HAVE_GETPT) || defined(HAVE_DEV_PTMX)))
/*
* if no PTYRANGE[01] is in the config file, we pick a default
*/
# ifndef PTYRANGE0
# define PTYRANGE0 "qpr"
# endif
# ifndef PTYRANGE1
# define PTYRANGE1 "0123456789abcdef"
# endif
# ifdef M_UNIX
static char PtyProto[] = "/dev/ptypXY";
static char TtyProto[] = "/dev/ttypXY";
# else
static char PtyProto[] = "/dev/ptyXY";
static char TtyProto[] = "/dev/ttyXY";
# endif
# endif
static int openpty(int *amaster, int *aslave, char *dummy, struct termios *termp, struct winsize *wp)
{
int master, slave;
#ifdef HAVE__GETPTY
int filedes[2];
char *line;
line = _getpty(&filedes[0], O_RDWR|O_NDELAY, 0600, 0);
if (0 == line)
return -1;
if (0 > (filedes[1] = open(line, O_RDWR)))
{
close(filedes[0]);
return -1;
}
master=filedes[0];
slave=filedes[1];
#elif defined(HAVE_GRANTPT) && (defined(HAVE_GETPT) || defined(HAVE_DEV_PTMX) || defined(HAVE_POSIX_OPENPT))
# ifdef HAVE_PTSNAME
char *name;
# else
char name[80];
# endif
# ifdef HAVE_GETPT
master=getpt();
# elif defined(HAVE_DEV_PTMX)
master=open("/dev/ptmx", O_RDWR);
# else
master=posix_openpt(O_RDWR);
# endif
if (master<0)
return -1;
if (grantpt(master)<0||unlockpt(master)<0)
goto close_master;
# ifdef HAVE_PTSNAME
if (!(name=ptsname(master)))
goto close_master;
# else
if (ptsname_r(master, name, 80))
goto close_master;
# endif
slave=open(name, O_RDWR);
if (slave==-1)
goto close_master;
# ifdef HAVE_STROPTS_H
if (isastream(slave))
if (ioctl(slave, I_PUSH, "ptem")<0
||ioctl(slave, I_PUSH, "ldterm")<0)
goto close_slave;
# endif
goto ok;
close_slave:
close (slave);
close_master:
close (master);
return -1;
ok:
#else
char *p, *q;
char PtyName[32], TtyName[32];
strcpy(PtyName, PtyProto);
strcpy(TtyName, TtyProto);
for (p = PtyName; *p != 'X'; p++)
;
for (q = TtyName; *q != 'X'; q++)
;
for (char *l = PTYRANGE0; (*p = *l); l++)
{
for (char *d = PTYRANGE1; (p[1] = *d); d++)
{
if ((master = open(PtyName, O_RDWR | O_NOCTTY)) == -1)
continue;
q[0] = *l;
q[1] = *d;
if (access(TtyName, R_OK | W_OK))
{
close(master);
continue;
}
if ((slave=open(TtyName, O_RDWR|O_NOCTTY))==-1)
{
close(master);
continue;
}
goto ok;
}
}
return -1;
ok:
#endif
if (termp)
tcsetattr(master, TCSANOW, termp);
if (wp)
ioctl(master, TIOCSWINSZ, wp);
/* let's ignore errors on these ioctls silently */
*amaster=master;
*aslave=slave;
return 0;
}
int forkpty(int *amaster, char *dummy, struct termios *termp, struct winsize *wp)
{
int master, slave;
int pid;
if (openpty(&master, &slave, 0, termp, wp))
return -1;
pid=fork();
switch (pid)
{
case -1:
close(master);
close(slave);
return -1;
case 0:
close(master);
setsid();
dup2(slave, 0);
dup2(slave, 1);
dup2(slave, 2);
close(slave);
return 0;
default:
close(slave);
*amaster=master;
return pid;
}
}
#endif
#ifndef HAVE_CFMAKERAW
void cfmakeraw(struct termios *ta)
{
ta->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
ta->c_oflag &= ~OPOST;
ta->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
ta->c_cflag &= ~(CSIZE|PARENB);
ta->c_cflag |= CS8;
ta->c_cc[VMIN]=1;
ta->c_cc[VTIME]=0;
}
#endif
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