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#include <errno.h>
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#include "lib.h"
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#include "sys9.h"
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int
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pipe(int fildes[2])
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{
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	Fdinfo *fi;
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	int i;
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	if(!fildes){
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		errno = EFAULT;
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		return -1;
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	}
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	if(_PIPE(fildes) < 0)
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		_syserrno();
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	else
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	if(fildes[0] < 0 || fildes[0]>=OPEN_MAX ||
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	   fildes[1] < 0 || fildes[1]>=OPEN_MAX) {
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		errno = EMFILE;
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		return -1;
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	}
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	for(i = 0; i <=1; i++) {
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		fi = &_fdinfo[fildes[i]];
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		fi->flags = FD_ISOPEN;
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		fi->oflags = O_RDWR;
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		fi->uid = 0;	/* none */
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		fi->gid = 0;
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	}
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	return 0;
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}