Adding portable pseudo-terminal code. Not yet tested -- but not yet used.
This commit was SVN r2027.
Этот коммит содержится в:
David Daniel
родитель
ac36e0fc27
Коммит
7735e6dec5
258
src/util/pty.c
Обычный файл
258
src/util/pty.c
Обычный файл
@ -0,0 +1,258 @@
|
||||
/*
|
||||
* $HEADER$
|
||||
*/
|
||||
|
||||
/*-
|
||||
* 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.
|
||||
* 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 "ompi_config.h"
|
||||
|
||||
#ifdef HAVE_SYS_CDEFS_H
|
||||
# include <sys/cdefs.h>
|
||||
#endif
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <fcntl.h>
|
||||
#ifdef HAVE_TERMIOS_H
|
||||
# include <termios.h>
|
||||
#else
|
||||
# ifdef HAVE_TERMIO_H
|
||||
# include <termio.h>
|
||||
# endif
|
||||
#endif
|
||||
#include <errno.h>
|
||||
#ifdef HAVE_UNISTD_H
|
||||
# include <unistd.h>
|
||||
#endif
|
||||
#include <stdio.h>
|
||||
#ifdef HAVE_STRING_H
|
||||
# include <string.h>
|
||||
#endif
|
||||
#include <grp.h>
|
||||
|
||||
#ifdef HAVE_PTSNAME
|
||||
# include <stdlib.h>
|
||||
# ifdef HAVE_STROPTS_H
|
||||
# include <stropts.h>
|
||||
# endif
|
||||
#endif
|
||||
|
||||
|
||||
static int ptym_open(char *pts_name);
|
||||
static int ptys_open(int fdm, char *pts_name);
|
||||
|
||||
|
||||
int ompi_forkpty(int *amaster, char *name, struct termios *termp,
|
||||
struct winsize *winp)
|
||||
{
|
||||
int master, slave;
|
||||
pid_t pid;
|
||||
|
||||
if (ompi_openpty(&master, &slave, name, termp, winp) < 0) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
pid = fork();
|
||||
if (pid < 0) { /* error */
|
||||
return -1;
|
||||
} else if (pid > 0) { /* parent */
|
||||
*amaster = master;
|
||||
close(slave);
|
||||
} else { /* child */
|
||||
close(master);
|
||||
ompi_login_tty(slave);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return pid;
|
||||
}
|
||||
|
||||
|
||||
int ompi_login_tty(int fd)
|
||||
{
|
||||
setsid(2);
|
||||
#ifdef TIOCSCTTY
|
||||
if (ioctl(fd, TIOCSCTTY, (char *) NULL) == -1) {
|
||||
return (-1);
|
||||
}
|
||||
#endif
|
||||
dup2(fd, 0);
|
||||
dup2(fd, 1);
|
||||
dup2(fd, 2);
|
||||
if (fd > 2) {
|
||||
close(fd);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int ompi_openpty(int *amaster, int *aslave, char *name,
|
||||
struct termios *termp, struct winsize *winp)
|
||||
{
|
||||
char line[20];
|
||||
*amaster = ptym_open(line);
|
||||
if (*amaster < 0) {
|
||||
return -1;
|
||||
}
|
||||
*aslave = ptys_open(*amaster, line);
|
||||
if (*aslave < 0) {
|
||||
close(*amaster);
|
||||
return -1;
|
||||
}
|
||||
if (name) {
|
||||
strcpy(name, line);
|
||||
}
|
||||
#ifndef TCSAFLUSH
|
||||
#define TCSAFLUSH TCSETAF
|
||||
#endif
|
||||
if (termp) {
|
||||
(void) tcsetattr(*aslave, TCSAFLUSH, termp);
|
||||
}
|
||||
#ifdef TIOCSWINSZ
|
||||
if (winp) {
|
||||
(void) ioctl(*aslave, TIOCSWINSZ, (char *) winp);
|
||||
}
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int ptym_open(char *pts_name)
|
||||
{
|
||||
int fdm;
|
||||
#ifdef HAVE_PTSNAME
|
||||
char *ptr;
|
||||
|
||||
strcpy(pts_name, "/dev/ptmx");
|
||||
fdm = open(pts_name, O_RDWR);
|
||||
if (fdm < 0) {
|
||||
return -1;
|
||||
}
|
||||
if (grantpt(fdm) < 0) { /* grant access to slave */
|
||||
close(fdm);
|
||||
return -2;
|
||||
}
|
||||
if (unlockpt(fdm) < 0) { /* clear slave's lock flag */
|
||||
close(fdm);
|
||||
return -3;
|
||||
}
|
||||
ptr = ptsname(fdm);
|
||||
if (ptr == NULL) { /* get slave's name */
|
||||
close(fdm);
|
||||
return -4;
|
||||
}
|
||||
strcpy(pts_name, ptr); /* return name of slave */
|
||||
return fdm; /* return fd of master */
|
||||
#else
|
||||
char *ptr1, *ptr2;
|
||||
|
||||
strcpy(pts_name, "/dev/ptyXY");
|
||||
/* array index: 012345689 (for references in following code) */
|
||||
for (ptr1 = "pqrstuvwxyzPQRST"; *ptr1 != 0; ptr1++) {
|
||||
pts_name[8] = *ptr1;
|
||||
for (ptr2 = "0123456789abcdef"; *ptr2 != 0; ptr2++) {
|
||||
pts_name[9] = *ptr2;
|
||||
/* try to open master */
|
||||
fdm = open(pts_name, O_RDWR);
|
||||
if (fdm < 0) {
|
||||
if (errno == ENOENT) { /* different from EIO */
|
||||
return -1; /* out of pty devices */
|
||||
} else {
|
||||
continue; /* try next pty device */
|
||||
}
|
||||
}
|
||||
pts_name[5] = 't'; /* chage "pty" to "tty" */
|
||||
return fdm; /* got it, return fd of master */
|
||||
}
|
||||
}
|
||||
return -1; /* out of pty devices */
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
static int ptys_open(int fdm, char *pts_name)
|
||||
{
|
||||
int fds;
|
||||
#ifdef HAVE_PTSNAME
|
||||
/* following should allocate controlling terminal */
|
||||
fds = open(pts_name, O_RDWR);
|
||||
if (fds < 0) {
|
||||
close(fdm);
|
||||
return -5;
|
||||
}
|
||||
if (ioctl(fds, I_PUSH, "ptem") < 0) {
|
||||
close(fdm);
|
||||
close(fds);
|
||||
return -6;
|
||||
}
|
||||
if (ioctl(fds, I_PUSH, "ldterm") < 0) {
|
||||
close(fdm);
|
||||
close(fds);
|
||||
return -7;
|
||||
}
|
||||
if (ioctl(fds, I_PUSH, "ttcompat") < 0) {
|
||||
close(fdm);
|
||||
close(fds);
|
||||
return -8;
|
||||
}
|
||||
|
||||
if (ioctl(fdm, I_PUSH, "pckt") < 0) {
|
||||
close(fdm);
|
||||
close(fds);
|
||||
return -8;
|
||||
}
|
||||
if (ioctl(fdm, I_SRDOPT, RMSGN | RPROTDAT) < 0) {
|
||||
close(fdm);
|
||||
close(fds);
|
||||
return -8;
|
||||
}
|
||||
|
||||
return fds;
|
||||
#else
|
||||
int gid;
|
||||
struct group *grptr;
|
||||
|
||||
grptr = getgrnam("tty");
|
||||
if (grptr != NULL) {
|
||||
gid = grptr->gr_gid;
|
||||
} else {
|
||||
gid = -1; /* group tty is not in the group file */
|
||||
}
|
||||
/* following two functions don't work unless we're root */
|
||||
chown(pts_name, getuid(), gid);
|
||||
chmod(pts_name, S_IRUSR | S_IWUSR | S_IWGRP);
|
||||
fds = open(pts_name, O_RDWR);
|
||||
if (fds < 0) {
|
||||
close(fdm);
|
||||
return -1;
|
||||
}
|
||||
return fds;
|
||||
#endif
|
||||
}
|
||||
Загрузка…
x
Ссылка в новой задаче
Block a user