]>
Commit | Line | Data |
---|---|---|
2aa62f2b | 1 | /** @file\r |
2 | Implementation of internal function to return the (stdio) flags for a given mode.\r | |
3 | \r | |
4 | Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials are licensed and made available\r | |
6 | under the terms and conditions of the BSD License that accompanies this\r | |
7 | distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php.\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | Copyright (c) 1990, 1993\r | |
14 | The Regents of the University of California. All rights reserved.\r | |
15 | \r | |
16 | This code is derived from software contributed to Berkeley by\r | |
17 | Chris Torek.\r | |
18 | \r | |
19 | Redistribution and use in source and binary forms, with or without\r | |
20 | modification, are permitted provided that the following conditions\r | |
21 | are met:\r | |
22 | - Redistributions of source code must retain the above copyright\r | |
23 | notice, this list of conditions and the following disclaimer.\r | |
24 | - Redistributions in binary form must reproduce the above copyright\r | |
25 | notice, this list of conditions and the following disclaimer in the\r | |
26 | documentation and/or other materials provided with the distribution.\r | |
27 | - Neither the name of the University nor the names of its contributors\r | |
28 | may be used to endorse or promote products derived from this software\r | |
29 | without specific prior written permission.\r | |
30 | \r | |
31 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"\r | |
32 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
33 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
34 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE\r | |
35 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r | |
36 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r | |
37 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r | |
38 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r | |
39 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r | |
40 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r | |
41 | POSSIBILITY OF SUCH DAMAGE.\r | |
42 | \r | |
43 | NetBSD: flags.c,v 1.14 2003/08/07 16:43:23 agc Exp\r | |
44 | flags.c 8.1 (Berkeley) 6/4/93\r | |
45 | **/\r | |
46 | #include <LibConfig.h>\r | |
47 | #include <sys/EfiCdefs.h>\r | |
48 | \r | |
49 | #include <sys/types.h>\r | |
50 | #include <assert.h>\r | |
51 | #include <fcntl.h>\r | |
52 | #include <stdio.h>\r | |
53 | #include <errno.h>\r | |
54 | #include "reentrant.h"\r | |
55 | #include "local.h"\r | |
56 | \r | |
57 | /*\r | |
58 | * Return the (stdio) flags for a given mode. Store the flags\r | |
59 | * to be passed to an open() syscall through *optr.\r | |
60 | * Return 0 on error.\r | |
61 | */\r | |
62 | int\r | |
63 | __sflags(const char *mode, int *optr)\r | |
64 | {\r | |
65 | int ret, m, o;\r | |
66 | \r | |
67 | _DIAGASSERT(mode != NULL);\r | |
68 | \r | |
69 | switch (*mode++) {\r | |
70 | \r | |
71 | case 'r': /* open for reading */\r | |
72 | ret = __SRD;\r | |
73 | m = O_RDONLY;\r | |
74 | o = 0;\r | |
75 | break;\r | |
76 | \r | |
77 | case 'w': /* open for writing */\r | |
78 | ret = __SWR;\r | |
79 | m = O_WRONLY;\r | |
80 | o = O_CREAT | O_TRUNC;\r | |
81 | break;\r | |
82 | \r | |
83 | case 'a': /* open for appending */\r | |
84 | ret = __SWR;\r | |
85 | m = O_WRONLY;\r | |
86 | o = O_CREAT | O_APPEND;\r | |
87 | break;\r | |
88 | \r | |
89 | default: /* illegal mode */\r | |
90 | errno = EINVAL;\r | |
91 | return (0);\r | |
92 | }\r | |
93 | \r | |
94 | /*\r | |
95 | * [rwa]\+ or [rwa]b\+ means read and write\r | |
96 | * f means open only plain files.\r | |
97 | */\r | |
98 | for (; *mode; mode++)\r | |
99 | switch (*mode) {\r | |
100 | case '+':\r | |
101 | ret = __SRW;\r | |
102 | m = O_RDWR;\r | |
103 | break;\r | |
104 | case 'f':\r | |
105 | o |= O_NONBLOCK;\r | |
106 | break;\r | |
107 | case 'b':\r | |
108 | break;\r | |
109 | default: /* We could produce a warning here */\r | |
110 | break;\r | |
111 | }\r | |
112 | \r | |
113 | *optr = m | o;\r | |
114 | return (ret);\r | |
115 | }\r |