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freopen.c (269116) freopen.c (289863)
1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without

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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)freopen.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Chris Torek.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 20 unchanged lines hidden (view full) ---

29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#if defined(LIBC_SCCS) && !defined(lint)
34static char sccsid[] = "@(#)freopen.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
37__FBSDID("$FreeBSD: head/lib/libc/stdio/freopen.c 269116 2014-07-26 08:41:03Z ache $");
37__FBSDID("$FreeBSD: head/lib/libc/stdio/freopen.c 289863 2015-10-24 02:23:15Z ache $");
38
39#include "namespace.h"
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <fcntl.h>
43#include <errno.h>
44#include <limits.h>
45#include <unistd.h>

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235 /*
236 * When opening in append mode, even though we use O_APPEND,
237 * we need to seek to the end so that ftell() gets the right
238 * answer. If the user then alters the seek pointer, or
239 * the file extends, this will fail, but there is not much
240 * we can do about this. (We could set __SAPP and check in
241 * fseek and ftell.)
242 */
38
39#include "namespace.h"
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <fcntl.h>
43#include <errno.h>
44#include <limits.h>
45#include <unistd.h>

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235 /*
236 * When opening in append mode, even though we use O_APPEND,
237 * we need to seek to the end so that ftell() gets the right
238 * answer. If the user then alters the seek pointer, or
239 * the file extends, this will fail, but there is not much
240 * we can do about this. (We could set __SAPP and check in
241 * fseek and ftell.)
242 */
243 if (oflags & O_APPEND)
243 if (oflags & O_APPEND) {
244 /* XXX: Reuse __SALC for O_APPEND. */
245 fp->_flags |= __SALC;
244 (void) _sseek(fp, (fpos_t)0, SEEK_END);
246 (void) _sseek(fp, (fpos_t)0, SEEK_END);
247 }
245 FUNLOCKFILE(fp);
246 return (fp);
247}
248 FUNLOCKFILE(fp);
249 return (fp);
250}