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Diffstat (limited to 'mysql/mysys/my_access.c')
| -rw-r--r-- | mysql/mysys/my_access.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/mysql/mysys/my_access.c b/mysql/mysys/my_access.c deleted file mode 100644 index 0d66643..0000000 --- a/mysql/mysys/my_access.c +++ /dev/null @@ -1,268 +0,0 @@ -/* Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ - -#include "mysys_priv.h" -#include "my_sys.h" -#include <m_string.h> -#include "my_thread_local.h" - -#ifdef _WIN32 - -/* - Check a file or path for accessability. - - SYNOPSIS - file_access() - path Path to file - amode Access method - - DESCRIPTION - This function wraps the normal access method because the access - available in MSVCRT> +reports that filenames such as LPT1 and - COM1 are valid (they are but should not be so for us). - - RETURN VALUES - 0 ok - -1 error (We use -1 as my_access is mapped to access on other platforms) -*/ - -int my_access(const char *path, int amode) -{ - WIN32_FILE_ATTRIBUTE_DATA fileinfo; - BOOL result; - - result= GetFileAttributesEx(path, GetFileExInfoStandard, &fileinfo); - if (! result || - (fileinfo.dwFileAttributes & FILE_ATTRIBUTE_READONLY) && (amode & W_OK)) - { - errno= EACCES; - set_my_errno(EACCES); - return -1; - } - return 0; -} - -#endif /* _WIN32 */ - - -/* - List of file names that causes problem on windows - - NOTE that one can also not have file names of type CON.TXT - - NOTE: it is important to keep "CLOCK$" on the first place, - we skip it in check_if_legal_tablename. -*/ -static const char *reserved_names[]= -{ - "CLOCK$", - "CON", "PRN", "AUX", "NUL", - "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", - "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9", - NullS -}; - -#define MAX_RESERVED_NAME_LENGTH 6 - - -/* - Looks up a null-terminated string in a list, - case insensitively. - - SYNOPSIS - str_list_find() - list list of items - str item to find - - RETURN - 0 ok - 1 reserved file name -*/ -static int str_list_find(const char **list, const char *str) -{ - const char **name; - for (name= list; *name; name++) - { - if (!my_strcasecmp(&my_charset_latin1, *name, str)) - return 1; - } - return 0; -} - - -/* - A map for faster reserved_names lookup, - helps to avoid loops in many cases. - 1 - can be the first letter - 2 - can be the second letter - 4 - can be the third letter -*/ -static char reserved_map[256]= -{ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* !"#$%&'()*+,-./ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0123456789:;<=>? */ - 0,1,0,1,0,0,0,0,0,0,0,0,7,4,5,2, /* @ABCDEFGHIJKLMNO */ - 3,0,2,0,4,2,0,0,4,0,0,0,0,0,0,0, /* PQRSTUVWXYZ[\]^_ */ - 0,1,0,1,0,0,0,0,0,0,0,0,7,4,5,2, /* bcdefghijklmno */ - 3,0,2,0,4,2,0,0,4,0,0,0,0,0,0,0, /* pqrstuvwxyz{|}~. */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* ................ */ - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 /* ................ */ -}; - - -/* - Check if a table name may cause problems - - SYNOPSIS - check_if_legal_tablename - name Table name (without any extensions) - - DESCRIPTION - We don't check 'CLOCK$' because dollar sign is encoded as @0024, - making table file name 'CLOCK@0024', which is safe. - This is why we start lookup from the second element - (i.e. &reserver_name[1]) - - RETURN - 0 ok - 1 reserved file name -*/ - -int check_if_legal_tablename(const char *name) -{ - DBUG_ENTER("check_if_legal_tablename"); - DBUG_RETURN(name[0] != 0 && name[1] != 0 && - (reserved_map[(uchar) name[0]] & 1) && - (reserved_map[(uchar) name[1]] & 2) && - (reserved_map[(uchar) name[2]] & 4) && - str_list_find(&reserved_names[1], name)); -} - - -#ifdef _WIN32 -/** - Checks if the drive letter supplied is valid or not. Valid drive - letters are A to Z, both lower case and upper case. - - @param drive_letter : The drive letter to validate. - - @return TRUE if the drive exists, FALSE otherwise. -*/ -static my_bool does_drive_exists(char drive_letter) -{ - DWORD drive_mask= GetLogicalDrives(); - drive_letter= toupper(drive_letter); - - return (drive_letter >= 'A' && drive_letter <= 'Z') && - (drive_mask & (0x1 << (drive_letter - 'A'))); -} - -/** - Verifies if the file name supplied is allowed or not. On Windows - file names with a colon (:) are not allowed because such file names - store data in Alternate Data Streams which can be used to hide - the data. - - @param name contains the file name with or without path - @param length contains the length of file name - @param allow_current_dir TRUE if paths like C:foobar are allowed, - FALSE otherwise - - @return TRUE if the file name is allowed, FALSE otherwise. -*/ -my_bool is_filename_allowed(const char *name MY_ATTRIBUTE((unused)), - size_t length MY_ATTRIBUTE((unused)), - my_bool allow_current_dir MY_ATTRIBUTE((unused))) -{ - /* - For Windows, check if the file name contains : character. - Start from end of path and search if the file name contains : - */ - const char* ch = NULL; - for (ch= name + length - 1; ch >= name; --ch) - { - if (FN_LIBCHAR == *ch || '/' == *ch) - break; - else if (':' == *ch) - { - /* - File names like C:foobar.txt are allowed since the syntax means - file foobar.txt in current directory of C drive. However file - names likes CC:foobar are not allowed since this syntax means ADS - foobar in file CC. - */ - return (allow_current_dir && (ch - name == 1) && - does_drive_exists(*name)); - } - } - return TRUE; -} /* is_filename_allowed */ -#endif /* _WIN32 */ - -#if defined(_WIN32) - - -/* - Check if a path will access a reserverd file name that may cause problems - - SYNOPSIS - check_if_legal_filename - path Path to file - - RETURN - 0 ok - 1 reserved file name -*/ - -int check_if_legal_filename(const char *path) -{ - const char *end; - const char **reserved_name; - DBUG_ENTER("check_if_legal_filename"); - - if (!is_filename_allowed(path, strlen(path), TRUE)) - DBUG_RETURN(1); - - path+= dirname_length(path); /* To start of filename */ - if (!(end= strchr(path, FN_EXTCHAR))) - end= strend(path); - if (path == end || (uint) (end - path) > MAX_RESERVED_NAME_LENGTH) - DBUG_RETURN(0); /* Simplify inner loop */ - - for (reserved_name= reserved_names; *reserved_name; reserved_name++) - { - const char *reserved= *reserved_name; /* never empty */ - const char *name= path; - - do - { - if (*reserved != my_toupper(&my_charset_latin1, *name)) - break; - if (++name == end && !reserved[1]) - DBUG_RETURN(1); /* Found wrong path */ - } while (*++reserved); - } - DBUG_RETURN(0); -} - -#endif /* defined(_WIN32) */ |