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150 lines
3.7 KiB
150 lines
3.7 KiB
--- ../mosh/src/frontend/pty.cc 2016-04-29 00:42:37.207832463 +1000
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+++ ./src/frontend/pty.cc 2016-04-29 00:40:31.306486322 +1000
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@@ -0,0 +1,147 @@
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+/*
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+ Mosh: the mobile shell
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+ Copyright 2012 Keith Winstein
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+
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+ This program is free software: you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation, either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>.
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+*/
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+
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+#include "config.h"
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+
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+#include <sys/types.h>
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+#include <sys/stat.h>
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+#include <sys/ioctl.h>
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+#include <fcntl.h>
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+#include <termios.h>
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+#include <unistd.h>
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+#include <stdlib.h>
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+#include <errno.h>
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+#include <string.h>
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+#include <pty.h>
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+
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+#ifndef HAVE_OPENPTY
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+/* from dropbear 0.53.1 sshpty.c, original license: "can be used freely for any purpose." */
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+int my_openpty (int *amaster, int *aslave, char *name, const struct termios *termp,
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+ const struct winsize *winp)
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+{
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+ int master, slave;
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+ char *name_slave;
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+
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+ master = open("/dev/ptmx", O_RDWR);
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+ if (master == -1) {
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+// TRACE(("Fail to open master"))
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+ return -1;
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+ }
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+
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+ if (grantpt(master))
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+ goto fail;
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+
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+ if (unlockpt(master))
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+ goto fail;
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+
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+ name_slave = ptsname(master);
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+// TRACE(("openpty: slave name %s", name_slave))
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+ slave = open(name_slave, O_RDWR | O_NOCTTY);
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+ if (slave == -1)
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+ {
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+ goto fail;
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+ }
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+
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+ if(termp)
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+ tcsetattr(slave, TCSAFLUSH, termp);
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+ if (winp)
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+ ioctl (slave, TIOCSWINSZ, winp);
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+
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+ *amaster = master;
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+ *aslave = slave;
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+ if (name != NULL)
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+ strcpy(name, name_slave);
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+
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+ return 0;
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+
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+ fail:
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+ close (master);
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+ return -1;
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+}
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+#endif
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+
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+#ifndef HAVE_LOGIN_TTY
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+/* from glibc 2.14, login/login_tty.c, under the BSD license */
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+int login_tty(int fd)
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+{
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+ (void) setsid();
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+#ifdef TIOCSCTTY
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+ if (ioctl(fd, TIOCSCTTY, (char *)NULL) == -1)
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+ return (-1);
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+#else
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+ {
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+ /* This might work. */
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+ char *fdname = ttyname (fd);
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+ int newfd;
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+ if (fdname)
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+ {
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+ if (fd != 0)
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+ (void) close (0);
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+ if (fd != 1)
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+ (void) close (1);
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+ if (fd != 2)
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+ (void) close (2);
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+ newfd = open (fdname, O_RDWR);
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+ (void) close (newfd);
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+ }
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+ }
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+#endif
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+ while (dup2(fd, 0) == -1 && errno == EBUSY)
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+ ;
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+ while (dup2(fd, 1) == -1 && errno == EBUSY)
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+ ;
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+ while (dup2(fd, 2) == -1 && errno == EBUSY)
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+ ;
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+ if (fd > 2)
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+ (void) close(fd);
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+ return (0);
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+}
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+#endif
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+
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+int my_forkpty (int *amaster, char *name, const struct termios *termp, const struct winsize *winp) {
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+#ifdef HAVE_FORKPTY
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+//return forkpty(amaster, name, termp, winp);
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+#else
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+/* from glibc 2.14, login/forkpty.c, under the LGPL 2.1 (or later) license */
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+ int master, slave, pid;
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+
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+ if (openpty (&master, &slave, name, termp, winp) == -1)
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+ return -1;
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+
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+ switch (pid = fork ())
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+ {
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+ case -1:
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+ close (master);
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+ close (slave);
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+ return -1;
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+ case 0:
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+ /* Child. */
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+ close (master);
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+ if (login_tty (slave))
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+ _exit (1);
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+
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+ return 0;
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+ default:
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+ /* Parent. */
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+ *amaster = master;
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+ close (slave);
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+
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+ return pid;
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+ }
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+#endif
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+}
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