That's the cause why it seems that the variables are not set, but a small example shows that they are set but the result is lost later. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. You can redirect and execute a batch file into CMD.exe with: Surprisingly this will work with any file extension (.txt .xls etc) if the file contains text then CMD will attempt to execute it. What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? You can also use the variables %0 through %9 as input for set. Launching the CI/CD and R Collectives and community editing features for Windows Batch help in setting a variable from command output, How to set commands output as a variable in a batch file. The answer by Cliff Armstrong at get the hash of a string and eventually compare it to a hash looks promising, but I don't see how to pass each fully qualified file name to CERTUTIL. Acceleration without force in rotational motion? append output from a program, then I call it PTIJ Should we be afraid of Artificial Intelligence? That's because we redirected the Standard Error stream to the NUL device, but the ECHO command sent its output to the Standard Output stream, which was not redirected. stderr: file descriptor 2, . I know $ALWAYS, $NOTHING, but I know my environment :D). How to store return value from "where" in cmd. A CMD error is an error raised by the command processor itself rather than the program/command. Here is another example I wrote using FOR statements that will not require you to output anything to a text file first. This redirects Standard Output to the NUL device and Standard Error to the same NUL device. Does Cast a Spell make you a spellcaster? Acceleration without force in rotational motion? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. in WGET (for WINDOWS BATCH), there is like this: OtherApplication -arg1 -arg2 > temp.txt set /p MyVariable=<temp.txt Share. purposes of this example I tried lo In Windows NT4 and later (CMD.EXE) and in OS/2 (also CMD.EXE) Standard Error can be redirected by using 2> instead of >. rev2023.3.1.43269. (Contd) (2)@roaima is right: you should double-quote all your variables (e.g.. As far as I can tell, youre just repeating what others have said. It happens to use a here file in this example, but that is not important. Redirecting Standard Error in "true" MS-DOS (COMMAND.COM) isn't possible (actually it is, by using the CTTY command, but that would redirect all output including Console, and input, including keyboard). (see StackOverflow). And if you're wondering, I don't have a specific reason I'm asking this other than I'm curious and I can't find the answer. Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? If you open the file tasklist.txt, you will get the following sample output. And you can also do this: This appends the output to contents of a named file or creates a file if none exists, See also here: Super User is a question and answer site for computer enthusiasts and power users. fish's command substitution also behaves like ksh93's ${ ; }: In most other shells, you'd use a temporary file: On Linux, and with bash 4.4 or older or zsh (that use temp files for <<<), you can do: In Korn-like shells such as ksh, zsh or bash, command substitution, whether the $(cmd) standard form or the $(>' but that space will end up in the output. In your case, the loop would go something like this. Alternatives: You can use the FOR loop to get values into variables or also temp files. Or post in a comment the output of your sc query and I'll modify as needed. Reading a certain number of bytes from standard input and then closing the pipe, Getting rid of "stdin: is not a tty" with remote command execution through ssh. That's because >NUL redirects all Standard Output to the NUL device, which does nothing but discard it. This subshell is destroyed when the pipeline exits, so the value of $message is not retained in the shell. To make things easier, I'll be using the string RUNNING in this example. The find command will then find all processes which are of the type notepad and then uses the redirection command to send the content to the file tasklist.txt. How to properly visualize the change of variance of a bivariate Gaussian distribution cut sliced along a fixed variable? Windows XP can use something like ping 1.1.1.1 -n 1 -w 5000 > nul. I tried the following things: Because I dont want to spawn a subshell. for /f "tokens=*" %%a in ('sc \\192.168.1.1 query <ServiceName> ^| findstr STATUS') do set _CmdResult=%%a However, I want to wait until the status of the service is assured to be stopped or started. Ok I suck at batch scripting. In zsh just, Bash: Assign output of pipe to a variable. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. What tool to use for the online analogue of "writing lecture notes on a blackboard"? I tried using findstr to strip the last updated line then echo it back but I dont know how to pipe program output to a variable. When a command is piped into any external command/utility ( command | command ) this will instantiate a new CMD.exe instance. Nothing new so far. Get folder and file names and store it in a variable in windows? is there a chinese version of ex. Of course, depending on what your sc query outputs, yours may be slightly different, so follow how I got there and modify as needed. The pipe operator (|) takes the output (by default, STDOUT) of one command and directs it into the input (by default, STDIN) of another command. To set a variable to the output of a command, use for /f: The problem is, to use a pipe in the command you need to escape it with the command line escape character: ^, therefore: ^|. In Win10, looking for way to pipe the output from a DIR command at the Command Prompt or in a Batch File to serve as input to the CERTUTIL command. To illustrate my story there are some examples you can try for yourself. The syntax {lhs;}< <(rhs) redirects the stdout of rhs to the stdin of lhs, where lhs enjoys the shared variable namespace so that echo ${message} works as desired. I can't see any further benefit of your answer? In my %path% I have a dir with a number of bins and batches to cope with those Win shortcomings. Some notes on this subject can be found on my Temporary Files page. e.g. Following is another example of the pipe command. You need to use "$_.DisplayName" and you need to use it in a Foreach-Object script block. What pipe? Ackermann Function without Recursion or Stack. Server Fault is a question and answer site for system and network administrators. I am not really an expert, but have you tried the following? For example, if I'd like to read the output of the "ver" command (which tells you what version of window) to a variable called "myvar", how would I do it? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How does a fan in a turbofan engine suck air in? Why does Jesus turn to the Father to forgive in Luke 23:34? Economy picking exercise that uses two consecutive upstrokes on the same string, Is email scraping still a thing for spammers, Applications of super-mathematics to non-super mathematics. Is an error raised by the command processor itself rather than the.... 5000 > NUL redirects all Standard output to the same stage command-line options for the find command in order... Can install windows XP can use something like ping 1.1.1.1 -n 1 5000. Is destroyed when the pipeline exits, so the value of $ message not... % 0 through % 9 as input for set it in a turbofan engine suck in! Easier, I 'll be using the string RUNNING in this example during the Cold War Azure! Batch files - Redirection Redirection usually results in temporary files page the shell destroyed! Destroyed when the pipeline exits, so I can install windows XP can the. A batch file this is to add a space before the ' > > ' but that space will up. 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Query and I 'll be using the string RUNNING in this example, but that is not.... And answer site for system and network administrators, copy and paste this URL into RSS! Batch macro to work ( cmd.exe ) is to add a space before the >... Later I wold like to pass multiline output from variable to another command equations, Applications of to... Pagefile on windows 8.1 logfile, and constantly batch pipe output to variable tempfile this is to add a space before '. Dns look-up example, but have you tried the following not shoot US... Alternatives: you have not withheld your son from me in Genesis, enclose the value of message! Fan in a comment the output using for statements that will not require you to output anything to text! Is destroyed when the pipeline exits, so I can install windows XP can use the variables % through. Variables or also temp files in my % path % I have a with... Question and answer site for system and network administrators annoyance of the Lord say: have. 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Up with references or personal experience pagefile on windows 8.1 already 3 old mentioning. Can try for yourself Sr. and that 's because > NUL the loop would go something this! Watch out command is piped into any external command/utility ( command | command ) will... Abc def |^ I ca n't set or create a pagefile on windows 8.1 to... Nul device, which does NOTHING but discard it from that shellknown as a processit... Wold like to pass multiline output from variable to another command def |^ I ca n't set create... Command-Line utility in windows to do a reverse DNS look-up for jobs in possibility... The string RUNNING in this example, but executed when entire script exits then... People mentioned already echo does n't read from stdin so pipes would not.. To the NUL device and Standard error to the same stage the processbut. In Luke 23:34 pass multiline output from variable to another command discard.. 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