1 | /* |
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2 | * Copyright (c) 1990 The Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms are permitted |
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6 | * provided that the above copyright notice and this paragraph are |
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7 | * duplicated in all such forms and that any documentation, |
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8 | * advertising materials, and other materials related to such |
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9 | * distribution and use acknowledge that the software was developed |
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10 | * by the University of California, Berkeley. The name of the |
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11 | * University may not be used to endorse or promote products derived |
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12 | * from this software without specific prior written permission. |
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13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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16 | */ |
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17 | |
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18 | /* |
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19 | FUNCTION |
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20 | <<fopen64>>---open a large file |
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21 | |
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22 | INDEX |
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23 | fopen64 |
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24 | INDEX |
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25 | _fopen64_r |
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26 | |
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27 | SYNOPSIS |
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28 | #include <stdio.h> |
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29 | FILE *fopen64(const char *<[file]>, const char *<[mode]>); |
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30 | FILE *_fopen64_r(void *<[reent]>, |
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31 | const char *<[file]>, const char *<[mode]>); |
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32 | |
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33 | DESCRIPTION |
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34 | <<fopen64>> is identical to <<fopen>> except it opens a large file that |
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35 | is potentially >2GB in size. See <<fopen>> for further details. |
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36 | |
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37 | RETURNS |
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38 | <<fopen64>> return a file pointer which you can use for other file |
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39 | operations, unless the file you requested could not be opened; in that |
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40 | situation, the result is <<NULL>>. If the reason for failure was an |
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41 | invalid string at <[mode]>, <<errno>> is set to <<EINVAL>>. |
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42 | |
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43 | PORTABILITY |
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44 | <<fopen64>> is a glibc extension. |
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45 | |
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46 | Supporting OS subroutines required: <<close>>, <<fstat64>>, <<isatty>>, |
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47 | <<lseek64>>, <<open64>>, <<read>>, <<sbrk>>, <<write>>. |
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48 | */ |
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49 | |
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50 | /* Copied from fopen.c */ |
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51 | |
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52 | #if defined(LIBC_SCCS) && !defined(lint) |
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53 | static char sccsid[] = "%W% (Berkeley) %G%"; |
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54 | #endif /* LIBC_SCCS and not lint */ |
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55 | |
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56 | #include <stdio.h> |
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57 | #include <errno.h> |
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58 | #include "local.h" |
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59 | #ifdef __CYGWIN__ |
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60 | #include <fcntl.h> |
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61 | #endif |
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62 | #include <sys/lock.h> |
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63 | |
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64 | #ifdef __LARGE64_FILES |
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65 | |
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66 | FILE * |
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67 | _fopen64_r (struct _reent *ptr, |
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68 | const char *file, |
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69 | const char *mode) |
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70 | { |
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71 | register FILE *fp; |
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72 | register int f; |
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73 | int flags, oflags; |
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74 | |
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75 | if ((flags = __sflags (ptr, mode, &oflags)) == 0) |
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76 | return NULL; |
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77 | if ((fp = __sfp (ptr)) == NULL) |
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78 | return NULL; |
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79 | |
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80 | if ((f = _open64_r (ptr, file, oflags, 0666)) < 0) |
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81 | { |
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82 | _newlib_sfp_lock_start (); |
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83 | fp->_flags = 0; /* release */ |
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84 | #ifndef __SINGLE_THREAD__ |
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85 | __lock_close_recursive (fp->_lock); |
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86 | #endif |
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87 | _newlib_sfp_lock_end (); |
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88 | return NULL; |
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89 | } |
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90 | |
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91 | _newlib_flockfile_start (fp); |
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92 | |
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93 | fp->_file = f; |
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94 | fp->_flags = flags; |
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95 | fp->_cookie = (void *) fp; |
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96 | fp->_read = __sread; |
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97 | fp->_write = __swrite64; |
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98 | fp->_seek = __sseek; |
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99 | fp->_seek64 = __sseek64; |
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100 | fp->_close = __sclose; |
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101 | |
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102 | if (fp->_flags & __SAPP) |
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103 | _fseeko64_r (ptr, fp, 0, SEEK_END); |
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104 | |
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105 | #ifdef __SCLE |
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106 | if (__stextmode (fp->_file)) |
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107 | fp->_flags |= __SCLE; |
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108 | #endif |
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109 | |
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110 | fp->_flags |= __SL64; |
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111 | |
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112 | _newlib_flockfile_end (fp); |
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113 | return fp; |
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114 | } |
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115 | |
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116 | #ifndef _REENT_ONLY |
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117 | |
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118 | FILE * |
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119 | fopen64 (const char *file, |
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120 | const char *mode) |
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121 | { |
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122 | return _fopen64_r (_REENT, file, mode); |
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123 | } |
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124 | |
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125 | #endif |
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126 | |
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127 | #endif /* __LARGE64_FILES */ |
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