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Annotation of embedaddon/tmux/compat/forkpty-sunos.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
        !             3:  *
        !             4:  * Permission to use, copy, modify, and distribute this software for any
        !             5:  * purpose with or without fee is hereby granted, provided that the above
        !             6:  * copyright notice and this permission notice appear in all copies.
        !             7:  *
        !             8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            12:  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
        !            13:  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
        !            14:  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            15:  */
        !            16: 
        !            17: #include <sys/types.h>
        !            18: #include <sys/ioctl.h>
        !            19: 
        !            20: #include <fcntl.h>
        !            21: #include <stdlib.h>
        !            22: #include <strings.h>
        !            23: #include <stropts.h>
        !            24: #include <termios.h>
        !            25: #include <unistd.h>
        !            26: 
        !            27: #include "compat.h"
        !            28: 
        !            29: void fatal(const char *, ...);
        !            30: void fatalx(const char *, ...);
        !            31: 
        !            32: pid_t
        !            33: forkpty(int *master, char *name, struct termios *tio, struct winsize *ws)
        !            34: {
        !            35:        int     slave = -1;
        !            36:        char   *path;
        !            37:        pid_t   pid;
        !            38: 
        !            39:        if ((*master = open("/dev/ptmx", O_RDWR|O_NOCTTY)) == -1)
        !            40:                return (-1);
        !            41:        if (grantpt(*master) != 0)
        !            42:                goto out;
        !            43:        if (unlockpt(*master) != 0)
        !            44:                goto out;
        !            45: 
        !            46:        if ((path = ptsname(*master)) == NULL)
        !            47:                goto out;
        !            48:        if (name != NULL)
        !            49:                strlcpy(name, path, TTY_NAME_MAX);
        !            50:        if ((slave = open(path, O_RDWR|O_NOCTTY)) == -1)
        !            51:                goto out;
        !            52: 
        !            53:        switch (pid = fork()) {
        !            54:        case -1:
        !            55:                goto out;
        !            56:        case 0:
        !            57:                close(*master);
        !            58: 
        !            59:                setsid();
        !            60: #ifdef TIOCSCTTY
        !            61:                if (ioctl(slave, TIOCSCTTY, NULL) == -1)
        !            62:                        fatal("ioctl failed");
        !            63: #endif
        !            64: 
        !            65:                if (ioctl(slave, I_PUSH, "ptem") == -1)
        !            66:                        fatal("ioctl failed");
        !            67:                if (ioctl(slave, I_PUSH, "ldterm") == -1)
        !            68:                        fatal("ioctl failed");
        !            69: 
        !            70:                if (tio != NULL && tcsetattr(slave, TCSAFLUSH, tio) == -1)
        !            71:                        fatal("tcsetattr failed");
        !            72:                if (ioctl(slave, TIOCSWINSZ, ws) == -1)
        !            73:                        fatal("ioctl failed");
        !            74: 
        !            75:                dup2(slave, 0);
        !            76:                dup2(slave, 1);
        !            77:                dup2(slave, 2);
        !            78:                if (slave > 2)
        !            79:                        close(slave);
        !            80:                return (0);
        !            81:        }
        !            82: 
        !            83:        close(slave);
        !            84:        return (pid);
        !            85: 
        !            86: out:
        !            87:        if (*master != -1)
        !            88:                close(*master);
        !            89:        if (slave != -1)
        !            90:                close(slave);
        !            91:        return (-1);
        !            92: }