27 lines
509 B
C
27 lines
509 B
C
/* $Source$
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* $State$
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* $Revision$
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*/
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#include <fcntl.h>
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#include "libsys.h"
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/*
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* Say whether a particular fd is currently open in text or binary mode.
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* Assume that the fd is valid. Return O_TEXT or O_BINARY.
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*/
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int _sys_getmode(int fd)
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{
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int reqbegfd = fd & ~_FDVECMASK;
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struct _fdmodes *p = &_sys_fdmodes;
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_fdvec_t mask;
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while (p->begfd != reqbegfd)
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{
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p = p->next;
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if (!p)
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return O_TEXT;
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}
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mask = (_fdvec_t)1 << (fd & _FDVECMASK);
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return (p->modevec & mask) ? O_BINARY : O_TEXT;
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}
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