48 lines
864 B
C
48 lines
864 B
C
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/*
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* fflush.c - flush stream(s)
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*/
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/* $Header$ */
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#include <stdio.h>
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#include "loc_incl.h"
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int write(int d, static char *buf, int nbytes);
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int
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fflush(FILE *stream)
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{
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int count, c1, i, retval = 0;
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if (!stream) {
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for(i= 0; i < FOPEN_MAX; i++)
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if (_iotable[i] && fflush(_iotable[i]))
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retval = EOF;
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return retval;
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}
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if (!stream->_buf ||
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io_testflag(stream,_IONBF) ||
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!io_testflag(stream,_IOWRITE) )
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return(0);
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if (io_testflag(stream, _IOLBF))
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count = -stream->_count;
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else count = stream->_bufsiz - stream->_count;
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if ( count <= 0 )
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return(0);
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c1 = write(stream->_fd, (char *)stream->_buf, count);
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if ( count == c1 ) {
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if (io_testflag(stream, _IOLBF))
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stream->_count = 0;
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else stream->_count = stream->_bufsiz;
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stream->_ptr = stream->_buf;
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return(count);
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}
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stream->_flags |= _IOERR;
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return(EOF);
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}
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