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1 | /* Reentrant versions of lseek system call. */ |
1 | /* Reentrant versions of lseek system call. */ |
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2 | 2 | ||
3 | #include |
3 | #include |
4 | #include |
4 | #include |
5 | #include <_syslist.h> |
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6 | #include |
5 | #include <_syslist.h> |
7 | 6 | ||
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8 | /* Some targets provides their own versions of this functions. Those |
7 | /* Some targets provides their own versions of this functions. Those |
Line 14... | Line 13... | ||
14 | #endif |
13 | #endif |
15 | #endif |
14 | #endif |
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16 | 15 | ||
Line 17... | Line 16... | ||
17 | #ifndef REENTRANT_SYSCALLS_PROVIDED |
16 | #ifndef REENTRANT_SYSCALLS_PROVIDED |
18 | 17 | ||
19 | #pragma pack(push, 1) |
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20 | typedef struct |
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21 | { |
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22 | char sec; |
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23 | char min; |
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24 | char hour; |
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25 | char rsv; |
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26 | }detime_t; |
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27 | - | ||
28 | typedef struct |
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29 | { |
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30 | char day; |
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31 | char month; |
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32 | short year; |
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33 | }dedate_t; |
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34 | - | ||
35 | typedef struct |
- | |
36 | { |
- | |
37 | unsigned attr; |
- | |
38 | unsigned flags; |
- | |
39 | union |
- | |
40 | { |
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41 | detime_t ctime; |
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42 | unsigned cr_time; |
- | |
43 | }; |
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44 | union |
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45 | { |
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46 | dedate_t cdate; |
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47 | unsigned cr_date; |
- | |
48 | }; |
- | |
49 | union |
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50 | { |
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51 | detime_t atime; |
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52 | unsigned acc_time; |
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53 | }; |
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54 | union |
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55 | { |
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56 | dedate_t adate; |
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57 | unsigned acc_date; |
- | |
58 | }; |
- | |
59 | union |
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60 | { |
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61 | detime_t mtime; |
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62 | unsigned mod_time; |
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63 | }; |
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64 | union |
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65 | { |
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66 | dedate_t mdate; |
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67 | unsigned mod_date; |
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68 | }; |
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69 | unsigned size; |
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70 | unsigned size_high; |
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71 | } FILEINFO; |
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72 | - | ||
73 | #pragma pack(pop) |
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74 | 18 | /* We use the errno variable used by the system dependent layer. */ |
|
75 | - | ||
76 | extern unsigned __NFiles; |
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77 | - | ||
78 | #define __handle_check( __h, __r ) \ |
- | |
79 | if( (__h) < 0 || (__h) > __NFiles ) { \ |
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80 | ptr->_errno = EBADF ; \ |
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81 | return( __r ); \ |
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Line 82... | Line 19... | ||
82 | } |
19 | #undef errno |
83 | 20 | extern int errno; |
|
84 | 21 | ||
Line 114... | Line 51... | ||
114 | int fd _AND |
51 | int fd _AND |
115 | _off_t pos _AND |
52 | _off_t pos _AND |
116 | int whence) |
53 | int whence) |
117 | { |
54 | { |
118 | _off_t ret; |
55 | _off_t ret; |
119 | __file_handle *fh; |
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Line 120... | Line -... | ||
120 | - | ||
121 | __handle_check( fd, -1 ); |
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122 | fh = (__file_handle*) __getOSHandle( fd ); |
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123 | - | ||
124 | switch(whence) |
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125 | { |
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126 | case SEEK_SET: |
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127 | ret = pos; |
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128 | break; |
- | |
129 | case SEEK_CUR: |
- | |
130 | ret = fh->offset + pos; |
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131 | break; |
- | |
132 | case SEEK_END: |
56 | |
133 | { |
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134 | FILEINFO info; |
57 | errno = 0; |
135 | get_fileinfo(fh->name, &info); |
58 | if ((ret = _lseek (fd, pos, whence)) == (_off_t) -1 && errno != 0) |
136 | ret = pos + info.size; |
59 | ptr->_errno = errno; |
137 | break; |
60 | return ret; |
138 | } |
- | |
139 | default: |
- | |
140 | ptr->_errno = EINVAL; |
- | |
141 | return -1; |
- | |
142 | }; |
- | |
143 | - | ||
144 | fh->offset = ret; |
- | |
145 | - | ||
146 | return( ret ); |
- | |
147 | } |
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148 | - | ||
149 | _off_t |
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150 | _DEFUN (lseek, (fd, pos, whence), |
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151 | int fd _AND |
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152 | _off_t pos _AND |
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153 | int whence) |
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154 | - | ||
155 | { |
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156 | return _lseek_r(_REENT, fd, pos, whence); |
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Line 157... | Line 61... | ||
157 | }; |
61 | } |