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Annotation of 42BSD/ucb/lisp/franz/fpipe.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char *rcsid =
        !             3:    "$Header: /na/franz/franz/RCS/fpipe.c,v 1.1 83/01/29 12:49:40 jkf Exp $";
        !             4: #endif
        !             5: 
        !             6: /*                                     -[Sat Jan 29 12:44:16 1983 by jkf]-
        !             7:  *     fpipe.c                         $Locker:  $
        !             8:  * pipe creation
        !             9:  *
        !            10:  * (c) copyright 1982, Regents of the University of California
        !            11:  */
        !            12: 
        !            13: 
        !            14: #include "global.h"
        !            15: #include <signal.h>
        !            16: FILE *_dofpip(iodes)
        !            17: int iodes;
        !            18: {
        !            19:        register FILE *p;
        !            20: 
        !            21:        for(p=_iob; (p->_flag&(_IOWRT|_IOREAD))!=0; p++)
        !            22:                if (p >= _iob+_NFILE)
        !            23:                        return(NULL);
        !            24:        p->_file = iodes;
        !            25:        p->_cnt = 0;
        !            26:        p->_base = p->_ptr = NULL;
        !            27:        return(p);
        !            28: }
        !            29: 
        !            30: FILE * fpipe(info)
        !            31: FILE *info[2];
        !            32: {
        !            33:        register FILE *p;
        !            34:        int descrips[2];
        !            35: 
        !            36:        if(0 > pipe(descrips)) return( (FILE *) -1);
        !            37: 
        !            38:        if(NULL==(p = _dofpip(descrips[0]))) return( (FILE *) -1);
        !            39:        p->_flag = (_IONBF|_IOREAD);
        !            40:        info[0] = p;
        !            41: 
        !            42:        if(NULL==(p = _dofpip(descrips[1]))) return( (FILE *) -1);
        !            43:        p->_flag = _IOWRT;
        !            44:        info[1] = p;
        !            45:        return((FILE *) 2); /*indicate sucess*/
        !            46: }

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