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
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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[] = "@(#)fopen.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
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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[] = "@(#)fopen.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/fopen.c 249808 2013-04-23 13:33:13Z emaste $");
| 37__FBSDID("$FreeBSD: head/lib/libc/stdio/fopen.c 249810 2013-04-23 14:36:44Z emaste $");
|
38
39#include "namespace.h"
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <fcntl.h>
43#include <unistd.h>
44#include <stdio.h>
45#include <errno.h>
46#include <limits.h>
47#include "un-namespace.h"
48
49#include "local.h"
50
51FILE *
| 38
39#include "namespace.h"
40#include <sys/types.h>
41#include <sys/stat.h>
42#include <fcntl.h>
43#include <unistd.h>
44#include <stdio.h>
45#include <errno.h>
46#include <limits.h>
47#include "un-namespace.h"
48
49#include "local.h"
50
51FILE *
|
52fopen(file, mode)
53 const char * __restrict file;
54 const char * __restrict mode;
| 52fopen(const char * __restrict file, const char * __restrict mode)
|
55{
56 FILE *fp;
57 int f;
58 int flags, oflags;
59
60 if ((flags = __sflags(mode, &oflags)) == 0)
61 return (NULL);
62 if ((fp = __sfp()) == NULL)
63 return (NULL);
64 if ((f = _open(file, oflags, DEFFILEMODE)) < 0) {
65 fp->_flags = 0; /* release */
66 return (NULL);
67 }
68 /*
69 * File descriptors are a full int, but _file is only a short.
70 * If we get a valid file descriptor that is greater than
71 * SHRT_MAX, then the fd will get sign-extended into an
72 * invalid file descriptor. Handle this case by failing the
73 * open.
74 */
75 if (f > SHRT_MAX) {
76 fp->_flags = 0; /* release */
77 _close(f);
78 errno = EMFILE;
79 return (NULL);
80 }
81 fp->_file = f;
82 fp->_flags = flags;
83 fp->_cookie = fp;
84 fp->_read = __sread;
85 fp->_write = __swrite;
86 fp->_seek = __sseek;
87 fp->_close = __sclose;
88 /*
89 * When opening in append mode, even though we use O_APPEND,
90 * we need to seek to the end so that ftell() gets the right
91 * answer. If the user then alters the seek pointer, or
92 * the file extends, this will fail, but there is not much
93 * we can do about this. (We could set __SAPP and check in
94 * fseek and ftell.)
95 */
96 if (oflags & O_APPEND)
97 (void)_sseek(fp, (fpos_t)0, SEEK_END);
98 return (fp);
99}
| 53{
54 FILE *fp;
55 int f;
56 int flags, oflags;
57
58 if ((flags = __sflags(mode, &oflags)) == 0)
59 return (NULL);
60 if ((fp = __sfp()) == NULL)
61 return (NULL);
62 if ((f = _open(file, oflags, DEFFILEMODE)) < 0) {
63 fp->_flags = 0; /* release */
64 return (NULL);
65 }
66 /*
67 * File descriptors are a full int, but _file is only a short.
68 * If we get a valid file descriptor that is greater than
69 * SHRT_MAX, then the fd will get sign-extended into an
70 * invalid file descriptor. Handle this case by failing the
71 * open.
72 */
73 if (f > SHRT_MAX) {
74 fp->_flags = 0; /* release */
75 _close(f);
76 errno = EMFILE;
77 return (NULL);
78 }
79 fp->_file = f;
80 fp->_flags = flags;
81 fp->_cookie = fp;
82 fp->_read = __sread;
83 fp->_write = __swrite;
84 fp->_seek = __sseek;
85 fp->_close = __sclose;
86 /*
87 * When opening in append mode, even though we use O_APPEND,
88 * we need to seek to the end so that ftell() gets the right
89 * answer. If the user then alters the seek pointer, or
90 * the file extends, this will fail, but there is not much
91 * we can do about this. (We could set __SAPP and check in
92 * fseek and ftell.)
93 */
94 if (oflags & O_APPEND)
95 (void)_sseek(fp, (fpos_t)0, SEEK_END);
96 return (fp);
97}
|