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Annotation of embedaddon/tmux/compat/forkpty-sunos.c, revision 1.1.1.1

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: }