forked from github/abduco
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
/*
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* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
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* Copyright (c) 2012 Ross Palmer Mohn <rpmohn@waxandwane.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stropts.h>
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#include <unistd.h>
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#include <paths.h>
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pid_t forkpty(int *master, char *name, struct termios *tio, struct winsize *ws)
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{
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int slave, fd;
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char *path;
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pid_t pid;
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struct termios tio2;
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if ((*master = open("/dev/ptc", O_RDWR|O_NOCTTY)) == -1)
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return -1;
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if ((path = ttyname(*master)) == NULL)
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goto out;
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if ((slave = open(path, O_RDWR|O_NOCTTY)) == -1)
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goto out;
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switch (pid = fork()) {
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case -1:
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goto out;
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case 0:
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close(*master);
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fd = open(_PATH_TTY, O_RDWR|O_NOCTTY);
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if (fd >= 0) {
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ioctl(fd, TIOCNOTTY, NULL);
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close(fd);
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}
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setsid();
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fd = open(_PATH_TTY, O_RDWR|O_NOCTTY);
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if (fd >= 0)
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return -1;
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fd = open(path, O_RDWR);
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if (fd < 0)
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return -1;
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close(fd);
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fd = open("/dev/tty", O_WRONLY);
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if (fd < 0)
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return -1;
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close(fd);
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if (tcgetattr(slave, &tio2) != 0)
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return -1;
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if (tio != NULL)
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memcpy(tio2.c_cc, tio->c_cc, sizeof tio2.c_cc);
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tio2.c_cc[VERASE] = '\177';
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if (tcsetattr(slave, TCSAFLUSH, &tio2) == -1)
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return -1;
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if (ioctl(slave, TIOCSWINSZ, ws) == -1)
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return -1;
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dup2(slave, 0);
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dup2(slave, 1);
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dup2(slave, 2);
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if (slave > 2)
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close(slave);
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return 0;
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}
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close(slave);
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return pid;
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out:
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if (*master != -1)
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close(*master);
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if (slave != -1)
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close(slave);
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return -1;
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}
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