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Annotation of embedaddon/tmux/pty.c, revision 1.1

1.1     ! misho       1: /* $OpenBSD$ */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com>
        !             5:  *
        !             6:  * Permission to use, copy, modify, and distribute this software for any
        !             7:  * purpose with or without fee is hereby granted, provided that the above
        !             8:  * copyright notice and this permission notice appear in all copies.
        !             9:  *
        !            10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            14:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
        !            15:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
        !            16:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            17:  */
        !            18: 
        !            19: #include <sys/types.h>
        !            20: #include <sys/ioctl.h>
        !            21: #include <sys/time.h>
        !            22: #ifdef __OpenBSD__
        !            23: #include <sys/tty.h>
        !            24: #endif
        !            25: 
        !            26: #include <fcntl.h>
        !            27: #include <string.h>
        !            28: #include <termios.h>
        !            29: #include <unistd.h>
        !            30: 
        !            31: #include "compat.h"
        !            32: 
        !            33: int    pty_open(int *);
        !            34: pid_t  pty_fork(int, int *, char *, size_t, struct winsize *);
        !            35: 
        !            36: #ifdef __OpenBSD__
        !            37: int
        !            38: pty_open(int *fd)
        !            39: {
        !            40:        *fd = open(PATH_PTMDEV, O_RDWR|O_CLOEXEC);
        !            41:        if (*fd < 0)
        !            42:            return (-1);
        !            43:        return (0);
        !            44: }
        !            45: #else
        !            46: int
        !            47: pty_open(__unused int *fd)
        !            48: {
        !            49:        *fd = -1;
        !            50:        return (0);
        !            51: }
        !            52: #endif
        !            53: 
        !            54: #ifdef __OpenBSD__
        !            55: pid_t
        !            56: pty_fork(int ptmfd, int *fd, char *name, size_t namelen, struct winsize *ws)
        !            57: {
        !            58:        struct ptmget   ptm;
        !            59:        pid_t           pid;
        !            60: 
        !            61:        if (ioctl(ptmfd, PTMGET, &ptm) == -1)
        !            62:                return (-1);
        !            63: 
        !            64:        strlcpy(name, ptm.sn, namelen);
        !            65:        ioctl(ptm.sfd, TIOCSWINSZ, ws);
        !            66: 
        !            67:        switch (pid = fork()) {
        !            68:        case -1:
        !            69:                close(ptm.cfd);
        !            70:                close(ptm.sfd);
        !            71:                return (-1);
        !            72:        case 0:
        !            73:                close(ptm.cfd);
        !            74:                login_tty(ptm.sfd);
        !            75:                return (0);
        !            76:        }
        !            77:        *fd = ptm.cfd;
        !            78:        close(ptm.sfd);
        !            79:        return (pid);
        !            80: }
        !            81: #else
        !            82: pid_t
        !            83: pty_fork(__unused int ptmfd, int *fd, char *name, __unused size_t namelen,
        !            84:     struct winsize *ws)
        !            85: {
        !            86:        return (forkpty(fd, name, NULL, ws));
        !            87: }
        !            88: #endif