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[] = "@(#)flags.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[] = "@(#)flags.c 8.1 (Berkeley) 6/4/93";
35#endif /* LIBC_SCCS and not lint */
36#include <sys/cdefs.h>
|
55{
56 int ret, m, o;
57
58 switch (*mode++) {
59
60 case 'r': /* open for reading */
61 ret = __SRD;
62 m = O_RDONLY;
63 o = 0;
64 break;
65
66 case 'w': /* open for writing */
67 ret = __SWR;
68 m = O_WRONLY;
69 o = O_CREAT | O_TRUNC;
70 break;
71
72 case 'a': /* open for appending */
73 ret = __SWR;
74 m = O_WRONLY;
75 o = O_CREAT | O_APPEND;
76 break;
77
78 default: /* illegal mode */
79 errno = EINVAL;
80 return (0);
81 }
82
83 /* 'b' (binary) is ignored */
84 if (*mode == 'b')
85 mode++;
86
87 /* [rwa][b]\+ means read and write */
88 if (*mode == '+') {
89 mode++;
90 ret = __SRW;
91 m = O_RDWR;
92 }
93
94 /* 'b' (binary) can appear here, too -- and is ignored again */
95 if (*mode == 'b')
96 mode++;
97
98 /* 'x' means exclusive (fail if the file exists) */
99 if (*mode == 'x') {
100 mode++;
101 if (m == O_RDONLY) {
102 errno = EINVAL;
103 return (0);
104 }
105 o |= O_EXCL;
106 }
107
108 /* set close-on-exec */
109 if (*mode == 'e')
110 o |= O_CLOEXEC;
111
112 *optr = m | o;
113 return (ret);
114}
| 53{
54 int ret, m, o;
55
56 switch (*mode++) {
57
58 case 'r': /* open for reading */
59 ret = __SRD;
60 m = O_RDONLY;
61 o = 0;
62 break;
63
64 case 'w': /* open for writing */
65 ret = __SWR;
66 m = O_WRONLY;
67 o = O_CREAT | O_TRUNC;
68 break;
69
70 case 'a': /* open for appending */
71 ret = __SWR;
72 m = O_WRONLY;
73 o = O_CREAT | O_APPEND;
74 break;
75
76 default: /* illegal mode */
77 errno = EINVAL;
78 return (0);
79 }
80
81 /* 'b' (binary) is ignored */
82 if (*mode == 'b')
83 mode++;
84
85 /* [rwa][b]\+ means read and write */
86 if (*mode == '+') {
87 mode++;
88 ret = __SRW;
89 m = O_RDWR;
90 }
91
92 /* 'b' (binary) can appear here, too -- and is ignored again */
93 if (*mode == 'b')
94 mode++;
95
96 /* 'x' means exclusive (fail if the file exists) */
97 if (*mode == 'x') {
98 mode++;
99 if (m == O_RDONLY) {
100 errno = EINVAL;
101 return (0);
102 }
103 o |= O_EXCL;
104 }
105
106 /* set close-on-exec */
107 if (*mode == 'e')
108 o |= O_CLOEXEC;
109
110 *optr = m | o;
111 return (ret);
112}
|