Teamviewer 8 Serial Number Txt File
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I have been trying to figure out how to get a list of computers and their team viewer IDs. At this point I have a file with computer names. The Batch file I started trying to write looks at that list of names creates a bridge to my machine then reports back the hostname and Teamviewer ClientID. The problem is that we have different versions of teamviewer installed and the location is not the same. When I run my batch file as it is it will give me teamviewer 7 ClientIDs but thats it. As this is my first batch file any help is greatly appreciated!
::Creates .txt file with hostname and Teamviewer ClientID on network location.
1 Answer
First batch - brave!... and also Bravo!!
Let's take the reg command to start with. Bizarrely, reg does not set errorlevel to non-0 if the requested key is missing. That's why ony the version 7 part was being executed.
reg query with a missing key produces no output but it does produce an error message, ERROR: The system was unable to find the specified registry key or value.The output string is sent tostdoutand is the output that would be processed by thedopart. The error string is sent tostderr` which is normally assigned to the console.
So - first, let's force num to be 'set' to nothing
The syntax SET 'var=value' (where value may be empty) is used to ensure that any stray trailing spaces are NOT included in the value assigned. set /a can safely be used 'quoteless'.
Batch is sensitive to spaces in a SET statement. SET FLAG = N sets a variable named 'FLAGSpace' to a value of 'SpaceN' set /a is a later implementation which ignores this rule. (just a caution)
Then we can use a tickled version of your code
where the additional 2^>nul redirects stderr messages to nul (ie nowhere). The caret ^ is called an escape character and is required here because the > is part of the reg query not part of the for. (the > is thus termed 'escaped')
The result will be that if the key exists, the set will be executed and num will be assigned a value. If the key is missing, num will remain unchanged.
Remember, we initialised num to nothing? And we may now have set num to something (if the key exists?) so now we can test whether the variable has been set or not
(batch is largely case-insensitive)
So - a little excursion now into the syntax of if. In the action part, batch has no idea of whether the string else is some command's parameter or is the keyword ELSE. Consequently, we need to tell it:
or
The positioning of the parentheses is critical. The first open must be on the same physical line as the if (or do) and if an else is used then both the preceding ) and succeeding ( must occur on the same physical line as the elseand there must be a space between the else keyword and the parentheses. This allows multiple lines to be conditionally executed. The parentheses are not required if the else clause is missing or on the else clause if only one command is required to be executed.
Batch simply executes instructions line-by-line until end-of-file or an exit statement is encountered, hence
is simpler written
so the instructions following the label :here would be executed if condition is false.
Hence, overall,
Unlike many languages, batch has no concept of the end of a 'procedure' - it simply continues execution line-by-line until it reaches the end-of-file. Consequently, you need to goto :eof after completing the mainline, otherwise execution will continue through the subroutine code. :EOF is a predefined label understood by CMD to mean end of file. The colon is required.