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Rev | Author | Line No. | Line |
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4973 | right-hear | 1 | /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */ |
2 | #include |
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3 | #include |
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4 | #include |
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5 | #include |
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6 | #include |
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7 | #include |
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8 | #include |
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9 | #include |
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10 | |||
11 | FILE * fopen(const char *file, const char *mode) |
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12 | { |
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13 | FILE *f; |
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14 | int fd, rw, oflags = 0; |
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15 | char tbchar; |
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16 | |||
17 | if (file == 0) |
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18 | return 0; |
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19 | if (mode == 0) |
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20 | return 0; |
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21 | |||
22 | f = __alloc_file(); |
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23 | if (f == NULL) |
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24 | return NULL; |
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25 | |||
26 | rw = (mode[1] == '+') || (mode[1] && (mode[2] == '+')); |
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27 | |||
28 | switch (*mode) |
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29 | { |
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30 | case 'a': |
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31 | oflags = O_CREAT | (rw ? O_RDWR : O_WRONLY); |
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32 | break; |
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33 | case 'r': |
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34 | oflags = rw ? O_RDWR : O_RDONLY; |
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35 | break; |
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36 | case 'w': |
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37 | oflags = O_TRUNC | O_CREAT | (rw ? O_RDWR : O_WRONLY); |
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38 | break; |
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39 | default: |
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40 | return (NULL); |
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41 | } |
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42 | if (mode[1] == '+') |
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43 | tbchar = mode[2]; |
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44 | else |
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45 | tbchar = mode[1]; |
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46 | if (tbchar == 't') |
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47 | oflags |= O_TEXT; |
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48 | else if (tbchar == 'b') |
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49 | oflags |= O_BINARY; |
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50 | else |
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51 | oflags |= (_fmode & (O_TEXT|O_BINARY)); |
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52 | |||
53 | fd = open(file, oflags, 0666); |
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54 | if (fd < 0) |
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55 | return NULL; |
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56 | |||
57 | if (*mode == 'a') |
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58 | lseek(fd, 0, SEEK_END); |
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59 | |||
60 | f->_cnt = 0; |
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61 | f->_file = fd; |
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62 | f->_bufsiz = 0; |
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63 | if (rw) |
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64 | f->_flag = _IORW; |
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65 | else if (*mode == 'r') |
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66 | f->_flag = _IOREAD; |
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67 | else |
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68 | f->_flag = _IOWRT; |
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69 | |||
70 | f->_base = f->_ptr = NULL; |
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71 | f->std_ops=NULL; |
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72 | // __libclog_printf("fopen: return=%x\n",f); |
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73 | return f; |
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74 | }> |