mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
136 lines
3.7 KiB
C
136 lines
3.7 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993, 1994
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
#if 0
|
|
static char sccsid[] = "@(#)pty.c 8.3 (Berkeley) 5/16/94";
|
|
#endif
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <grp.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
#include <libutil.h>
|
|
|
|
int
|
|
openpty(amaster, aslave, name, termp, winp)
|
|
int *amaster, *aslave;
|
|
char *name;
|
|
struct termios *termp;
|
|
struct winsize *winp;
|
|
{
|
|
char line[] = "/dev/ptyXX";
|
|
const char *cp1, *cp2;
|
|
int master, slave, ttygid;
|
|
struct group *gr;
|
|
|
|
if ((gr = getgrnam("tty")) != NULL)
|
|
ttygid = gr->gr_gid;
|
|
else
|
|
ttygid = -1;
|
|
|
|
for (cp1 = "pqrsPQRS"; *cp1; cp1++) {
|
|
line[8] = *cp1;
|
|
for (cp2 = "0123456789abcdefghijklmnopqrstuv"; *cp2; cp2++) {
|
|
line[5] = 'p';
|
|
line[9] = *cp2;
|
|
if ((master = open(line, O_RDWR, 0)) == -1) {
|
|
if (errno == ENOENT)
|
|
break; /* try the next pty group */
|
|
} else {
|
|
line[5] = 't';
|
|
(void) chown(line, getuid(), ttygid);
|
|
(void) chmod(line, S_IRUSR|S_IWUSR|S_IWGRP);
|
|
(void) revoke(line);
|
|
if ((slave = open(line, O_RDWR, 0)) != -1) {
|
|
*amaster = master;
|
|
*aslave = slave;
|
|
if (name)
|
|
strcpy(name, line);
|
|
if (termp)
|
|
(void) tcsetattr(slave,
|
|
TCSAFLUSH, termp);
|
|
if (winp)
|
|
(void) ioctl(slave, TIOCSWINSZ,
|
|
(char *)winp);
|
|
return (0);
|
|
}
|
|
(void) close(master);
|
|
}
|
|
}
|
|
}
|
|
errno = ENOENT; /* out of ptys */
|
|
return (-1);
|
|
}
|
|
|
|
int
|
|
forkpty(amaster, name, termp, winp)
|
|
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:
|
|
/*
|
|
* child
|
|
*/
|
|
(void) close(master);
|
|
login_tty(slave);
|
|
return (0);
|
|
}
|
|
/*
|
|
* parent
|
|
*/
|
|
*amaster = master;
|
|
(void) close(slave);
|
|
return (pid);
|
|
}
|