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Annotation of 43BSDReno/usr.bin/window/wwenviron.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Edward Wang at The University of California, Berkeley.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: static char sccsid[] = "@(#)wwenviron.c        3.26 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: #ifdef POSIX_TTY
        !            29: #include <sys/ioctl.h>
        !            30: #endif
        !            31: #include <sys/signal.h>
        !            32: 
        !            33: /*
        !            34:  * Set up the environment of this process to run in window 'wp'.
        !            35:  */
        !            36: wwenviron(wp)
        !            37: register struct ww *wp;
        !            38: {
        !            39:        register i;
        !            40: #ifndef TIOCSCTTY
        !            41:        int pgrp = getpid();
        !            42: #endif
        !            43:        char buf[1024];
        !            44: 
        !            45: #ifndef TIOCSCTTY
        !            46:        if ((i = open("/dev/tty", 0)) < 0)
        !            47:                goto bad;
        !            48:        if (ioctl(i, TIOCNOTTY, (char *)0) < 0)
        !            49:                goto bad;
        !            50:        (void) close(i);
        !            51: #endif
        !            52:        if ((i = wp->ww_socket) < 0) {
        !            53:                struct winsize winsize;
        !            54: 
        !            55:                if ((i = open(wp->ww_ttyname, 2)) < 0)
        !            56:                        goto bad;
        !            57:                if (wwsettty(i, &wwwintty, (struct ww_tty *)0) < 0)
        !            58:                        goto bad;
        !            59:                winsize.ws_row = wp->ww_w.nr;
        !            60:                winsize.ws_col = wp->ww_w.nc;
        !            61:                winsize.ws_xpixel = winsize.ws_ypixel = 0;
        !            62:                if (ioctl(i, TIOCSWINSZ, (char *)&winsize) < 0)
        !            63:                        goto bad;
        !            64:        }
        !            65:        (void) dup2(i, 0);
        !            66:        (void) dup2(i, 1);
        !            67:        (void) dup2(i, 2);
        !            68:        for (i = wwdtablesize - 1; i > 2; i--)
        !            69:                (void) close(i);
        !            70: #ifdef TIOCSCTTY
        !            71:        (void) setsid(0);
        !            72:        (void) ioctl(0, TIOCSCTTY, 0);
        !            73: #else
        !            74:        (void) ioctl(0, TIOCSPGRP, (char *)&pgrp);
        !            75:        (void) setpgrp(pgrp, pgrp);
        !            76: #endif
        !            77:        /* SIGPIPE is the only one we ignore */
        !            78:        (void) signal(SIGPIPE, SIG_DFL);
        !            79:        (void) sigsetmask(0);
        !            80:        /*
        !            81:         * Two conditions that make destructive setenv ok:
        !            82:         * 1. setenv() copies the string,
        !            83:         * 2. we've already called tgetent which copies the termcap entry.
        !            84:         */
        !            85:        (void) sprintf(buf, "%sco#%d:li#%d:%s",
        !            86:                WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap);
        !            87:        (void) setenv("TERMCAP", buf, 1);
        !            88:        (void) sprintf(buf, "%d", wp->ww_id + 1);
        !            89:        (void) setenv("WINDOW_ID", buf, 1);
        !            90:        return 0;
        !            91: bad:
        !            92:        wwerrno = WWE_SYS;
        !            93:        return -1;
        !            94: }

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