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Annotation of 43BSDTahoe/games/trek/shell.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)shell.c    5.3 (Berkeley) 6/18/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: /*
        !            23: **  CALL THE SHELL
        !            24: */
        !            25: 
        !            26: shell()
        !            27: {
        !            28:        int             i;
        !            29:        register int    pid;
        !            30:        register int    sav2, sav3;
        !            31: 
        !            32:        if (!(pid = fork()))
        !            33:        {
        !            34:                setuid(getuid());
        !            35:                nice(0);
        !            36:                execl("/bin/csh", "-", 0);
        !            37:                syserr("cannot execute /bin/csh");
        !            38:        }
        !            39:        sav2 = signal(2, 1);
        !            40:        sav3 = signal(3, 1);
        !            41:        while (wait(&i) != pid) ;
        !            42:        signal(2, sav2);
        !            43:        signal(3, sav3);
        !            44: }

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