1 /* $NetBSD: fopen.c,v 1.12 2003/08/07 16:43:24 agc Exp $ */
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
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11 * modification, are permitted provided that the following conditions
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14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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35 #include <sys/cdefs.h>
36 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid
[] = "@(#)fopen.c 8.1 (Berkeley) 6/4/93";
40 __RCSID("$NetBSD: fopen.c,v 1.12 2003/08/07 16:43:24 agc Exp $");
42 #endif /* LIBC_SCCS and not lint */
44 #include <sys/types.h>
52 #include "reentrant.h"
64 _DIAGASSERT(file
!= NULL
);
65 if ((flags
= __sflags(mode
, &oflags
)) == 0)
67 if ((fp
= __sfp()) == NULL
)
69 if ((f
= open(file
, oflags
, DEFFILEMODE
)) < 0)
71 if (oflags
& O_NONBLOCK
) {
73 if (fstat(f
, &st
) == -1) {
79 if (!S_ISREG(st
.st_mode
)) {
86 * File descriptors are a full int, but _file is only a short.
87 * If we get a valid file descriptor that is greater or equal to
88 * USHRT_MAX, then the fd will get sign-extended into an
89 * invalid file descriptor. Handle this case by failing the
90 * open. (We treat the short as unsigned, and special-case -1).
101 fp
->_write
= __swrite
;
103 fp
->_close
= __sclose
;
106 * When opening in append mode, even though we use O_APPEND,
107 * we need to seek to the end so that ftell() gets the right
108 * answer. If the user then alters the seek pointer, or
109 * the file extends, this will fail, but there is not much
110 * we can do about this. (We could set __SAPP and check in
113 if (oflags
& O_APPEND
)
114 (void) __sseek((void *)fp
, (fpos_t)0, SEEK_END
);
117 fp
->_flags
= 0; /* release */