Ремонт накопителей WD (Western Digital). Часть X - [130] :: Магнитные носители информации

DIREXISTS <FILESPEC>

Definition
Checks if a directory or file exists. Will return 1 if the directory or file exists, else 0. Folder paths must contain double back slashes.

Проверяет и то и другое. Файл тоже проверит. Хотя это лишнее и проверять как File Exists имеет меньше
накладных расходов.

IHNDL = FILEOPEN “<FILESPEC>”/<USRSTR>
The FileOpen command opens (or creates) the file specified by FileSpec and prepares it for reading or writing. FileSpec can be specified by either a fixed name in quotations or in a UsrStr (user string). Before using FileOpen you must specify the mode using the FileOpenMod, shown bellow. FileOpen returns a handle after the file is opened in the specified mode successfully. See FileErrNo for possible error conditions.

FILEERRNO
FileErrNo will be set to zero or an error as specified below after each file manipulation command. It is recommend that the FileErrNo to be tested against zero after each one of the operations explained above. If the value of FileErrNo is not zero it should be one of the following (which indicates the condition that caused the error) . The command that could cause the error is shown in parenthesis.
feNOENT    (FileOpen) No such file or directory.
This error means that either the file or the path was not found.
feBADF    (FileClose, FileRead, FileWrite) Bad file number
This error means that the iHndl used in FileRead, FileWrite or FileClose operation is and invalid file handle or the file is not open for reading, or the file is locked.
feACCES    (FileOpen) Permission denied
File cannot be opened for the mode specified by FileOpenMod

feEXIST    (Create , FileOpen) File exists
An attempt was made to create a file that already exists on the path.
feNFILE    (FileOpen) File table overflow

feMFILE    (FileOpen) Too many open files

No more file handles available. Too many files are open.
feNOSPC    (FileWrite) No space left on device

Т.е структура файла не проверяется и таким образом File Open только создаёт сложности вместо File Exists. К тому же я считаю уместным предполагать что состав пакета не меняется пользователем скрипта и поэтому мусора там не будет.

Модерирует : Akam1, Dr_StandBy, vertex4
Версия для печати • Подписаться • Добавить в закладки
Страницы: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161