59 lines
1 KiB
C
59 lines
1 KiB
C
/*
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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, const 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 (__iotab[i] && fflush(__iotab[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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|| !io_testflag(stream, _IOWRITING))
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return 0;
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if (io_testflag(stream, _IOREAD)) /* "a" or "+" mode */
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stream->_flags &= ~_IOWRITING;
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/*
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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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*/
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count = stream->_ptr - stream->_buf;
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stream->_ptr = stream->_buf;
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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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stream->_count = 0;
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/*
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if(stream != stderr)
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fprintf(stderr,"written %d bytes :\"%.*s\"\n"
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, c1, c1, stream->_buf);
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*/
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if ( count == c1 )
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return 0;
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stream->_flags |= _IOERR;
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return EOF;
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}
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