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