92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
/*
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* fflush.c - flush stream(s)
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*/
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/* $Id$ */
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "loc_incl.h"
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#if ACKCONF_WANT_STDIO
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int 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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{
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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, _IOREADING)
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&& !io_testflag(stream, _IOWRITING)))
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return 0;
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if (io_testflag(stream, _IOREADING))
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{
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/* (void) fseek(stream, 0L, SEEK_CUR); */
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int adjust = 0;
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if (stream->_buf && !io_testflag(stream, _IONBF))
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adjust = stream->_count;
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stream->_count = 0;
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lseek(fileno(stream), (off_t)adjust, SEEK_CUR);
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if (io_testflag(stream, _IOWRITE))
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stream->_flags &= ~(_IOREADING | _IOWRITING);
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stream->_ptr = stream->_buf;
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return 0;
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}
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else if (io_testflag(stream, _IONBF))
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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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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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if (io_testflag(stream, _IOAPPEND))
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{
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if (lseek(fileno(stream), 0L, SEEK_END) == -1)
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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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}
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c1 = write(stream->_fd, (char*)stream->_buf, count);
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stream->_count = 0;
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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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static void cleanup(void)
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{
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register int i;
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for (i = 0; i < FOPEN_MAX; i++)
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if (__iotab[i] && io_testflag(__iotab[i], _IOWRITING))
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(void)fflush(__iotab[i]);
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}
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void __register_stdio_cleanup(void)
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{
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static char registered = 0;
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if (!registered)
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{
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registered = 1;
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atexit(cleanup);
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}
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}
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#endif
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