12/13/2023 0 Comments Untar a file that defaults to a folderIf nothing is written to the file, it will be left unchanged.īehavior: Use the read from file command to read data from a file. However, a file opened in readwrite mode will be truncated following the last (highest) character position in the file that is written to. The readwrite, appending, and updating modes all open the file for both reading and writing. The following table lists the modes and summarizes the differences between them:Īll of the modes except for reading will create the file (including the full path to it) if it doesn’t already exist. The default mode is updating if you don't specify the manner of access. You can open files for reading only, for writing only, or for both reading and writing. Tip: When you open a file, you can optionally specify the manner in which the file will be accessed. Parameters: The name of a file to open or create. When you are finished with a file, you should close it by using either the close file or close all command. The open file command must be used to open a file before anything can be read from or written to that file with the read or write commands. Accessing a file as a container provides the simplest means of reading or manipulating its contents, but provides less control and is somewhat less efficient when performing multiple operations on the same file than the commands described here.īehavior: Opens or creates a file for reading or writing or both. In addition to using these commands, you can access a file directly as a container within your script, as described above. Use them to read and write data that is stored in the file system. The file input and output commands ( open file, close file, read from file, seek in file, and write to file) are for creating and accessing text or binary files on your system. Commands and Functions for Working with Files Set this property to true if you want to throw an exception if the file doesn't exist. The default is false, which means the nonexistent files are treated as empty. You can use The StrictFiles global property to control the behavior when reading a nonexistent file as a container. See The Umask global property for complete details about reading or setting these properties. When your SenseTalk command creates a new file, you can control the access permissions for the file as well as access to any folder created in the directory structure. Put contents as data into file "/tmp/binaryFile" Put file "/tmp/datafile" as data into myData To read or write a file as binary data instead of as text, specify as data: By default, SenseTalk uses UTF-8, a common 8-bit system for encoding Unicode characters. When accessing a file as a container, text is interpreted during both reading and writing according to the setting of the defaultStringEncoding global property. In these cases, you might prefer to use the commands described below in Commands and Functions for Working with Files. Occasionally, it might not be the most efficient approach to use if your script needs to do a significant amount of reading or writing in a file. Treating a file as a container is easy and works well for many situations. The value of the file expression is treated as empty in this case. The value of the result is also set to an error message when reading a file as a container if the file does not exist or cannot be accessed. If a command attempts to write to a file and fails for some reason (such as insufficient privileges for writing to the file), the result is set to an error message. Put line repeatindex() of MyFileVar into outputĪlthough this example only logs each line after it is read, you could instead add code to perform additional actions with the content, which here is stored into the variable output. Repeat the number of lines of MyFileVar times Put file "/Users/bob/Desktop/TestRead" into MyFileVar Using this approach, you can read an entire file with a single command: The simplest way to work with the contents of a file is to access the file directly as a SenseTalk container.
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