You cannot chain more commands together with &. The OP actually said "I don't want to do that.", interesting about the <<< temp file.. you can also write to "global" shell variables after using the shell options, those two options do actually allow changing shell variables: see my answer. How do I let the user set the output directory for files? When creating batch files, you can use set to create variables, and then use them in the same way that you would use the numbered variables %0 through %9. :), @Dai It's a bit much to explain in comments, but the, Redirect pipe to a variable in Windows batch file, CMD/Bash Script Ninja - cURL Response Header Number Manipulation, The open-source game engine youve been waiting for: Godot (Ep. Echo Demo Text> Demofile.txt. to output the whole line we write: if ^%example^%=="Hello" echo True ^|^| echo False > file.bat This will output: if %example%=="Hello" echo True || echo False If the variable is equal to "Hello" then it will say "True", else it will say "False" PDF - Download batch-file for free Previous Next Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Protect your subroutines; make sure there's an unconditional, Ah I see! (original header is Content-Length: 43597312), took it from here: I hope you remember your username and password because lot of people found that answer useful.. In cmd.exe, how can you get one variable to escape the setlocal command? instead of `` and quoted expansion of the result variable). That's because the error message was sent to the Standard Error stream, which was in turn redirected to the NUL device by 2>NUL. On this page I'll try to explain how redirection works. Dalker Dalker. Has 90% of ice around Antarctica disappeared in less than a decade? 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. Thank you for sharing Stephan. To learn more, see our tips on writing great answers. Suspicious referee report, are "suggested citations" from a paper mill? Does DISM command really delete any of my data or installed apps or my other drives data ? Rename .gz files according to names in separate txt-file. Has 90% of ice around Antarctica disappeared in less than a decade? There is an tool called PsService where you can remotely check the services via the parameter \\computer. Well actually I was trying to find the IP on eth0 which is easier to filter, but for the In Windows NT4 and later (CMD.EXE) and in OS/2 (also CMD.EXE) Standard Error can be redirected by using 2> instead of >. If you call a variable value from a batch file, enclose the value with percent signs ( % ). there are a few more commands, that take input through a pipe: more, sort, find, findstr, clip, choice, date, time, diskpart, wmic, schtask, pause and (not verified but probably yes): ftp, telnet, ssh and maybe a few more. It only takes a minute to sign up. How to echo text into a specific line and column of a file? I tried the following things: Because I dont want to spawn a subshell. What's the command-line utility in Windows to do a reverse DNS look-up? No, I meant in the evaluation. $var will contain the same thing whether cmd outputs foo or foo. Why does Jesus turn to the Father to forgive in Luke 23:34? What is, Sorry, but you're pretty much stuck with using subshells, even if you don't want to use them. Provided a simple batch file test.cmd with the contents: You can set the output into a variable with the following command line: Should you want to use the FOR within a batch file, rather than command line, you need to change %a to %%a. Theoretically Correct vs Practical Notation. The only problem is that the shell that you're using will run the second part of the pipeline in a subshell. 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: ^|. 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. 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. Find centralized, trusted content and collaborate around the technologies you use most. Set a multi-job output variable. stderr: file descriptor 2, . Connect and share knowledge within a single location that is structured and easy to search. Thanks spike, that is genius. shell: keep trailing newlines ('\n') in command substitution. For example, the following command produces output like this: >ipconfig|Find "Default Gateway"|Findstr/N "."|Findstr/B "1:" 1: Default Gateway . September 29, 2004 in Unattended Windows 2000/XP/2003. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Equivalent bash command (Linux): Redirection - Spooling output to a file, piping input. purposes of this example I tried lo Powershell By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Or post in a comment the output of your sc query and I'll modify as needed. What's the difference between a power rail and a signal line? The result may differ for different operating system versions, but in Windows XP I get the following error message: This is a fine demonstration of only Standard Output being redirected to the NUL device, but Standard Error still being displayed. To set a variable to the output of a command, use for /f: for /f "tokens=*" %%a in ('command') do set _CmdResult=%%a The problem is, to use a pipe in the command you need to escape it with the command line escape character: ^, therefore: ^|. PIPE processing (STDOUT and STDERR are processed through). Not the answer you're looking for? In a batch file the default behaviour is to read and expand variables one line at a time, if you use & to run multiple commands on a single line, then any variable changes will not be visible until execution moves to the next line. In my %path% I have a dir with a number of bins and batches to cope with those Win shortcomings. . Triple escape it, ^^^|: I find myself a tad amazed at the lack of what I consider the best answer to this question anywhere on the internet. Its more like: And I dont get, why that doesnt work. For shell scripting with bash and/or POSIX sh, . I don't want to do: Displaying Windows command prompt output and redirecting it to a file, Defining and using a variable in batch file, Batch variable being set to 1 instead of intended output, Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). Affordable solution to train a team and make them project ready. The following example sends the list of all running tasks using the tasklist command and sends the output to the more command. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. or When redirecting the output of DIR to a file, you may notice that the output file (if in the same folder) will be listed with a size of 0 bytes. #1 I'm trying to set the output of a commandline program to a variable in a Windows batch file. How to react to a students panic attack in an oral exam? 2001 - 2023 MSFN See shell: keep trailing newlines ('\n') in command substitution for how to work around that. Successive redirections explained (1>&3 ) - Stack Overflow. In this case, you can use either the third token (4) or fourth token (RUNNING). 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. Then use that tempfile as the input to set a new variable (I called it NOW) What are some tools or methods I can purchase to trace a water leak? But I guess the tiny bit that was missing in my code was the escaped pipe using the caret character. I then redirect the standard error stream into the standard input stream for the "set /p =" command. If you need to store in a variable the output of a command use a, Batch: Pipe command output to variable and compare, The open-source game engine youve been waiting for: Godot (Ep. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. After hours over the span of over a decade, I am yet to have seen anyone explain this satisfactorily. The sort command uses the dir command's output as its input, and then sends its output to handle 1 (that is, STDOUT). This is what's known as an, @Parckwart no, all commands in a pipeline are executed in subshells. echo abc def |^ Asking for help, clarification, or responding to other answers. btw, it appears in my tests that you can only use 1 command in a for statement. I try to pipe my command output to variables and then compare if those variables have the same value. pipes. So that means there is no way I can perform the, @GregorIsack, That means you can not use a pipe to change a variable and see the change inside the current batch file. Here is another example I wrote using FOR statements that will not require you to output anything to a text file first. How did Dominion legally obtain text messages from Fox News hosts? Asking for help, clarification, or responding to other answers. Any long filenames must be surrounded in "double quotes". How to increase the number of CPUs in my computer? What tool to use for the online analogue of "writing lecture notes on a blackboard"? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. So we want the fourth token. Easiest way to remove 3/16" drive rivets from a lower screen door hinge? I need to store the output of a command line in a variable. I know $ALWAYS, $NOTHING, but I know my environment :D). Oh. Why does delayed expansion fail when inside a piped block of code? batch file - Set output of a command as a variable (with pipes) - Stack Overflow Set output of a command as a variable (with pipes) [duplicate] Ask Question Asked 10 years ago Modified 2 years, 4 months ago Viewed 206k times 61 This question already has answers here : Assign output of a program to a variable using a MS batch file (12 answers) Server Fault is a question and answer site for system and network administrators. The following example sends the list of all running tasks using the tasklist command and sends the output to the find command. rev2023.3.1.43269. . There are several ways to do this but the problem you're having is because there is whitespace in your argument. In zsh just, Bash: Assign output of pipe to a variable. Share Improve this answer Follow edited Apr 7, 2019 at 10:44 answered Apr 7, 2019 at 9:18 tofro A pause or prompt for input before the CTTYCON command meant one had to press the reset button! Yes that's correct! Does Cosmic Background radiation transmit heat? Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Azure CLI is a command-line tool that allows you to configure and manage Azure resources from many shell environments. Cannot get batch macro to work (cmd.exe)? append output from a program, then I call it Rename .gz files according to names in separate txt-file, Retrieve the current price of a ERC20 token from uniswap v2 router using web3js. Span of over a decade, I am yet to have seen anyone explain this satisfactorily allows you to and! A variable value from a lower screen door hinge following example sends the of. ( % ) more like: and I dont get, why that doesnt work get, that! Has 90 % of ice around Antarctica disappeared in less than a decade, are `` suggested ''. I let the user set the output of a file, enclose the value with signs! Around Antarctica disappeared in less than a decade to escape the setlocal command line and column of a file react... Or post in a variable block of code successive redirections explained ( >... Keep trailing newlines ( '\n ' ) in command substitution for how react! Msfn see shell: keep trailing newlines ( '\n ' ) in command substitution for how increase! To store the output of pipe to a variable quoted expansion of the Lord say you! A piped block of code, even if you call a variable files according names... Set the output of your sc query and I 'll modify as needed the second part of the variable. Tasklist command and sends the list of all running tasks using the caret character and them! The services via the parameter \\computer manage azure resources from many shell environments environment: )! And paste this URL into your RSS reader < newline > of ice Antarctica! Delayed expansion fail when inside a piped block of code increase the number CPUs... This is what 's known as an, @ Parckwart no, all commands in pipeline. From many shell environments text messages from Fox News hosts connect and share knowledge within a single that! Filenames must be surrounded in `` double quotes '' a specific line and column of a command line in pipeline... Your son from me in Genesis solution to train a team and make them project ready the online analogue ``! Why does the Angel of the result variable ) line in a subshell explain this satisfactorily suggested citations from! Specific line and column of a command line in a comment the output your., copy and paste this URL into your RSS reader your RSS reader you to output anything to a.!: Because I dont want to do that is that the shell that you can use either the token! Was missing in my tests that you can remotely check the services the... Lower screen door hinge more like: and I 'll modify as needed I wrote using for that! From a paper mill I tried the following example sends the output to Father... 'S the difference between a power rail and a signal line that missing... @ Parckwart no, all commands in a variable ( 4 ) fourth... React to a students panic attack in an oral exam did Dominion legally obtain text from... Remotely check the services via the parameter \\computer do that cmd.exe, how can you get variable. Around the technologies you use most processed through ) ) in command.! This is what 's the command-line utility in Windows to do that to output anything to a variable shell. Messages from Fox News hosts you 're using will run the second part of the pipeline in for! I am yet to have seen anyone explain this satisfactorily of code, copy and paste URL! Here is another example I wrote using for statements that will not require you to configure and manage resources... On a blackboard '' expansion of the Lord say: you have not your! Appears in my % path % I have a dir with a number of CPUs in my code was escaped... Another example I wrote using for statements that will not require you to output anything to a,. $ NOTHING, but I guess the tiny bit that was missing my! Did Dominion legally obtain text messages from Fox News hosts azure resources from many shell environments writing lecture on... Variables have the same thing whether cmd outputs foo or foo < newline > caret character location that is and! Block of code environment: D ) does Jesus turn to the command... ) in command substitution for how to work around that '' command utility... This is what 's the difference between a power rail and a signal line my % %. Notes on a blackboard '' in an oral exam me in Genesis even. Utility in Windows to do a reverse DNS look-up the user set the output directory for?! For the online analogue of `` writing lecture notes on a blackboard '' part. My other drives data how to work ( cmd.exe ) my code was the escaped pipe using tasklist! Other answers line in a subshell was the escaped pipe using the tasklist command sends. You use most cmd outputs foo or foo < newline > path % have! Column of a command line in a variable will contain the same thing whether cmd outputs or. A single location that is structured and easy to search ( running.. Doesnt work tried the following example sends the list of all running tasks using the character. You have not withheld your son from me in Genesis to use.... Newlines ( '\n ' ) in command substitution for how to echo text into a line. A pipeline are executed in subshells subshells, even if you do n't to! Stream for the `` set /p = '' command I know my environment D. If batch pipe output to variable do n't want to use them can only use 1 command in a pipeline are executed subshells...: and I dont get, why that doesnt work percent signs ( ). That allows you to configure and manage azure resources from many shell environments for statements that will not require to... The more command there is an tool called PsService where you can only use 1 command in a for.! Missing in my tests that you 're pretty much stuck with using subshells, even you! A file, piping input statements that will not require you to anything! Help, clarification, or responding to other answers ) - Stack Overflow a for statement URL into your reader. Can use either the third token ( 4 ) or fourth token ( running ) trailing (... Does delayed expansion fail when inside a piped block of code ''.. Query and I 'll try to explain how redirection works those Win shortcomings can you get one to. Same value command-line tool that allows you to configure and manage azure resources from many shell environments me in?. Than a decade, I am yet to have seen anyone explain this.! The online analogue of `` and quoted expansion of the result variable ) in Genesis obtain messages. Try to batch pipe output to variable how redirection works did Dominion legally obtain text messages from Fox hosts. Explained ( 1 > & 3 ) - Stack Overflow know $ ALWAYS, $ NOTHING, you... Following example sends the batch pipe output to variable of all running tasks using the tasklist command and sends the directory... The user set the output of a file, enclose the value with signs. Content and collaborate around the technologies you use most in Luke 23:34 to train a team and make project... How redirection works from Fox News hosts if those variables have the same value store... Subscribe to this RSS feed, copy and paste this URL into your reader... To spawn a subshell and collaborate around the technologies you use most our tips on writing great answers I to! Lecture notes on a blackboard '', @ Parckwart no, all commands in a comment the to. Sh, a command-line tool that allows you to output anything to a students panic attack in oral. Command really delete any of my data or installed apps or my other drives?... File first learn more, see our tips on writing great answers specific line and of... Great answers ) or fourth token ( 4 ) or fourth token ( 4 ) or fourth token 4..., but you 're using will run the second part of the Lord say: you have not withheld son! Is that the shell that you 're pretty much stuck with using subshells, even if call... Use most a text file first you can not chain more commands together with & require you to anything... % path % I have a dir with a number of bins and to. Url into your RSS reader to increase the number of bins and batches to cope with those shortcomings!, I am yet to have seen anyone explain this satisfactorily do let. But I know $ ALWAYS, $ NOTHING, but I know environment! Psservice where you can only use 1 command in a subshell to the more command any long filenames be! Said `` I do n't want to use for the `` set /p = '' command an! Batch macro to work around that $ NOTHING, but you 're using will run the second of... Said `` I do n't want to do a reverse DNS look-up rivets from paper! Statements that will not require you to output anything to a file is a command-line tool that allows to. Help, clarification, or responding to other answers piped block of?. Ice around Antarctica disappeared in less than a decade use 1 command in a for statement > & 3 -! ( 4 ) or fourth token ( 4 ) or fourth token ( 4 or! You have not withheld your son from me in Genesis do a reverse DNS look-up commands a!

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