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/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* CV 2003-09-10: Cygwin specific changes applied. Code simplified just
* for Cygwin alone.
*/
#include "winsup.h"
#include <stdlib.h>
#include <utmp.h>
#include <unistd.h>
#include <sys/termios.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include "cygerrno.h"
extern "C" int
daemon (int nochdir, int noclose)
{
int fd;
switch (fork ())
{
case -1:
return -1;
case 0:
if (!wincap.is_winnt ())
{
/* Register as service under 9x/Me which allows to close
the parent window with the daemon still running.
This function only exists on 9x/Me and is autoloaded
so it fails silently on NT. */
DWORD WINAPI RegisterServiceProcess (DWORD, DWORD);
RegisterServiceProcess (0, 1);
}
break;
default:
/* This sleep avoids a race condition which kills the
child process if parent is started by a NT/W2K service.
FIXME: Is that still true? */
Sleep (1000L);
_exit (0);
}
if (setsid () == -1)
return -1;
if (!nochdir)
chdir ("/");
if (!noclose && (fd = open (_PATH_DEVNULL, O_RDWR, 0)) >= 0)
{
dup2 (fd, STDIN_FILENO);
dup2 (fd, STDOUT_FILENO);
dup2 (fd, STDERR_FILENO);
if (fd > 2)
close (fd);
}
return 0;
}
extern "C" int
login_tty (int fd)
{
char *fdname;
int newfd;
if (setsid () == -1)
return -1;
if ((fdname = ttyname (fd)))
{
if (fd != STDIN_FILENO)
close (STDIN_FILENO);
if (fd != STDOUT_FILENO)
close (STDOUT_FILENO);
if (fd != STDERR_FILENO)
close (STDERR_FILENO);
newfd = open (fdname, O_RDWR);
close (newfd);
}
dup2 (fd, STDIN_FILENO);
dup2 (fd, STDOUT_FILENO);
dup2 (fd, STDERR_FILENO);
if (fd > 2)
close (fd);
return 0;
}
extern "C" int
openpty (int *amaster, int *aslave, char *name, struct termios *termp,
struct winsize *winp)
{
int master, slave;
char pts[MAX_PATH];
if ((master = open ("/dev/ptmx", O_RDWR | O_NOCTTY)) >= 0)
{
grantpt (master);
unlockpt (master);
strcpy (pts, ptsname (master));
revoke (pts);
if ((slave = open (pts, O_RDWR | O_NOCTTY)) >= 0)
{
if (amaster)
*amaster = master;
if (aslave)
*aslave = slave;
if (name)
strcpy (name, pts);
if (termp)
tcsetattr (slave, TCSAFLUSH, termp);
if (winp)
ioctl (slave, TIOCSWINSZ, (char *) winp);
return 0;
}
close (master);
}
set_errno (ENOENT);
return -1;
}
extern "C" int
forkpty (int *amaster, char *name, struct termios *termp, struct winsize *winp)
{
int master, slave, pid;
if (openpty (&master, &slave, name, termp, winp) == -1)
return -1;
switch (pid = fork ())
{
case -1:
return -1;
case 0:
close (master);
login_tty (slave);
return 0;
}
if (amaster)
*amaster = master;
close (slave);
return pid;
}
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