mirror of
https://github.com/tmux/tmux.git
synced 2024-11-16 01:18:52 +00:00
120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
|
|
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
|
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <stropts.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
|
|
#include "compat.h"
|
|
|
|
void fatal(const char *, ...);
|
|
void fatalx(const char *, ...);
|
|
|
|
pid_t
|
|
forkpty(int *master, __unused char *name, struct termios *tio,
|
|
struct winsize *ws)
|
|
{
|
|
int slave = -1, fd, pipe_fd[2];
|
|
char *path, dummy;
|
|
pid_t pid;
|
|
|
|
if (pipe(pipe_fd) == -1)
|
|
return (-1);
|
|
|
|
if ((*master = open("/dev/ptc", O_RDWR|O_NOCTTY)) == -1)
|
|
goto out;
|
|
|
|
if ((path = ttyname(*master)) == NULL)
|
|
goto out;
|
|
|
|
if (name != NULL)
|
|
strlcpy(name, path, TTY_NAME_MAX);
|
|
|
|
if ((slave = open(path, O_RDWR|O_NOCTTY)) == -1)
|
|
goto out;
|
|
|
|
switch (pid = fork()) {
|
|
case -1:
|
|
goto out;
|
|
case 0:
|
|
close(*master);
|
|
|
|
close(pipe_fd[1]);
|
|
while (read(pipe_fd[0], &dummy, 1) == -1) {
|
|
if (errno != EINTR)
|
|
break;
|
|
}
|
|
close(pipe_fd[0]);
|
|
|
|
fd = open(_PATH_TTY, O_RDWR|O_NOCTTY);
|
|
if (fd >= 0) {
|
|
ioctl(fd, TIOCNOTTY, NULL);
|
|
close(fd);
|
|
}
|
|
|
|
if (setsid() < 0)
|
|
fatal("setsid");
|
|
|
|
fd = open(_PATH_TTY, O_RDWR|O_NOCTTY);
|
|
if (fd >= 0)
|
|
fatalx("open succeeded (failed to disconnect)");
|
|
|
|
fd = open(path, O_RDWR);
|
|
if (fd < 0)
|
|
fatal("open failed");
|
|
close(fd);
|
|
|
|
fd = open("/dev/tty", O_WRONLY);
|
|
if (fd < 0)
|
|
fatal("open failed");
|
|
close(fd);
|
|
|
|
if (tio != NULL && tcsetattr(slave, TCSAFLUSH, tio) == -1)
|
|
fatal("tcsetattr failed");
|
|
if (ioctl(slave, TIOCSWINSZ, ws) == -1)
|
|
fatal("ioctl failed");
|
|
|
|
dup2(slave, 0);
|
|
dup2(slave, 1);
|
|
dup2(slave, 2);
|
|
if (slave > 2)
|
|
close(slave);
|
|
|
|
return (0);
|
|
}
|
|
|
|
close(slave);
|
|
|
|
close(pipe_fd[0]);
|
|
close(pipe_fd[1]);
|
|
return (pid);
|
|
|
|
out:
|
|
if (*master != -1)
|
|
close(*master);
|
|
if (slave != -1)
|
|
close(slave);
|
|
|
|
close(pipe_fd[0]);
|
|
close(pipe_fd[1]);
|
|
return (-1);
|
|
}
|