| 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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