Windows CMD - How to pass two commands in Start - cmd

I want to open a new command prompt and ping on that one and then pause the new screen so that it does not go away.
I used the following two command and it is not behaving as I expected.
start "mytitle" ping google.com pause
start "mytitle" ping google.com & pause
The started screen goes away and the pause command in run in the first prompt.
What am I missing?

On using the command line
start "mytitle" ping google.com & pause
the Windows command interpreter reads it like writing:
start "mytitle" ping google.com
pause
So first START is executed to run ping in a separate command process and while ping is running parallel the current command process continues with waiting for an input from handle STDIN. The ampersand on command line not found within a double quoted argument string is interpreted as additional command to execute after executing START in current command process.
You have to use:
start "mytitle" cmd /C "ping google.com & pause"
Or with full qualified file names:
start "mytitle" %SystemRoot%\System32\cmd.exe /C "%SystemRoot%\System32\ping.exe google.com & pause"
The internal command START of cmd.exe is designed for running one application. It is not designed to run a command line with one or more commands like Windows command interpreter itself.
Now a separate command process is started with cmd.exe which should close automatically because of option /C after finishing the execution of the command line specified in double quotes as second argument for started cmd.exe containing the instructions to execute ping.exe and then pause.

Related

Running Flutter/Dart commands in batch script halts execution [duplicate]

I'm trying to get my commit-build.bat to execute other .BAT files as part of our build process.
Content of commit-build.bat:
"msbuild.bat"
"unit-tests.bat"
"deploy.bat"
This seems simple enough, but commit-build.bat only executes the first item in the list (msbuild.bat).
I have run each of the files separately with no problems.
Use:
call msbuild.bat
call unit-tests.bat
call deploy.bat
When not using CALL, the current batch file stops and the called batch file starts executing. It's a peculiar behavior dating back to the early MS-DOS days.
All the other answers are correct: use call. For example:
call "msbuild.bat"
History
In ancient DOS versions it was not possible to recursively execute batch files. Then the call command was introduced that called another cmd shell to execute the batch file and returned execution back to the calling cmd shell when finished.
Obviously in later versions no other cmd shell was necessary anymore.
In the early days many batch files depended on the fact that calling a batch file would not return to the calling batch file. Changing that behaviour without additional syntax would have broken many systems like batch menu systems (using batch files for menu structures).
As in many cases with Microsoft, backward compatibility therefore is the reason for this behaviour.
Tips
If your batch files have spaces in their names, use quotes around the name:
call "unit tests.bat"
By the way: if you do not have all the names of the batch files, you could also use for to do this (it does not guarantee the correct order of batch file calls; it follows the order of the file system):
FOR %x IN (*.bat) DO call "%x"
You can also react on errorlevels after a call. Use:
exit /B 1 # Or any other integer value in 0..255
to give back an errorlevel. 0 denotes correct execution. In the calling batch file you can react using
if errorlevel neq 0 <batch command>
Use if errorlevel 1 if you have an older Windows than NT4/2000/XP to catch all errorlevels 1 and greater.
To control the flow of a batch file, there is goto :-(
if errorlevel 2 goto label2
if errorlevel 1 goto label1
...
:label1
...
:label2
...
As others pointed out: have a look at build systems to replace batch files.
If we want to open multiple command prompts then we could use
start cmd /k
/k: is compulsory which will execute.
Launching many command prompts can be done as below.
start cmd /k Call rc_hub.bat 4444
start cmd /k Call rc_grid1.bat 5555
start cmd /k Call rc_grid1.bat 6666
start cmd /k Call rc_grid1.bat 5570.
Try:
call msbuild.bat
call unit-tests.bat
call deploy.bat
You are calling multiple batches in an effort to compile a program.
I take for granted that if an error occurs:
1) The program within the batch will exit with an errorlevel;
2) You want to know about it.
for %%b in ("msbuild.bat" "unit-tests.bat" "deploy.bat") do call %%b|| exit /b 1
'||' tests for an errorlevel higher than 0. This way all batches are called in order but will stop at any error, leaving the screen as it is for you to see any error message.
If we have two batch scripts, aaa.bat and bbb.bat, and call like below
call aaa.bat
call bbb.bat
When executing the script, it will call aaa.bat first, wait for the thread of aaa.bat terminate, and call bbb.bat.
But if you don't want to wait for aaa.bat to terminate to call bbb.bat, try to use the START command:
START ["title"] [/D path] [/I] [/MIN] [/MAX] [/SEPARATE | /SHARED]
[/LOW | /NORMAL | /HIGH | /REALTIME | /ABOVENORMAL | /BELOWNORMAL]
[/AFFINITY <hex affinity>] [/WAIT] [/B] [command/program]
[parameters]
Exam:
start /b aaa.bat
start /b bbb.bat
call msbuild.bat
call unit-tests.bat
call deploy.bat
using "&"
As you have noticed executing the bat directly without CALL,START, CMD /C causes to enter and execute the first file and then the process to stop as the first file is finished. Though you still can use & which will be the same as using command1 & command2 directly in the console:
(
first.bat
)&(
second.bat
)& (
third.bat
)&(
echo other commands
)
In a term of machine resources this will be the most efficient way though in the last block you won't be able to use command line GOTO,SHIFT,SETLOCAL.. and its capabilities will almost the same as in executing commands in the command prompt. And you won't be able to execute other command after the last closing bracket
Using CALL
call first.bat
call second.bat
call third.bat
In most of the cases it will be best approach - it does not create a separate process but has almost identical behaviour as calling a :label as subroutine. In MS terminology it creates a new "batch file context and pass control to the statement after the specified label. The first time the end of the batch file is encountered (that is, after jumping to the label), control returns to the statement after the call statement."
You can use variables set in the called files (if they are not set in a SETLOCAL block), you can access directly labels in the called file.
CMD /C, Pipes ,FOR /F
Other native option is to use CMD /C (the /C switch will force the called console to exit and return the control)
Something that cmd.exe is doing in non transparent way with using FOR /F against bat file or when pipes are used.
This will spawn a child process that will have all the environment ot the calling bat.
Less efficient in terms of resources but as the process is separate ,parsing crashes or calling an EXIT command will not stop the calling .bat
#echo off
CMD /c first.bat
CMD /C second.bat
::not so different than the above lines.
:: MORE,FINDSTR,FIND command will be able to read the piped data
:: passed from the left side
break|third.bat
START
Allows you more flexibility as the capability to start the scripts in separate window , to not wait them to finish, setting a title and so on. By default it starts the .bat and .cmd scripts with CMD /K which means that the spawned scripts will not close automatically.Again passes all the environment to the started scripts and consumes more resources than cmd /c:
:: will be executed in the same console window and will wait to finish
start "" /b /w cmd /c first.bat
::will start in a separate console window and WONT wait to be finished
:: the second console window wont close automatically so second.bat might need explicit exit command
start "" second.bat
::Will start it in a separate window ,but will wait to finish
:: closing the second window will cause Y/N prompt
:: in the original window
start "" /w third.cmd
::will start it in the same console window
:: but wont wait to finish. May lead to a little bit confusing output
start "" /b cmd /c fourth.bat
WMIC
Unlike the other methods from now on the examples will use external of the CMD.exe utilities (still available on Windows by default).
WMIC utility will create completely separate process so you wont be able directly to wait to finish. Though the best feature of WMIC is that it returns the id of the spawned process:
:: will create a separate process with cmd.exe /c
WMIC process call create "%cd%\first.bat","%cd%"
::you can get the PID and monitoring it with other tools
for /f "tokens=2 delims=;= " %%# in ('WMIC process call create "%cd%\second.bat"^,"%cd%" ^|find "ProcessId"') do (
set "PID=%%#"
)
echo %PID%
You can also use it to start a process on a remote machine , with different user and so on.
SCHTASKS
Using SCHTASKS provides some features as (obvious) scheduling , running as another user (even the system user) , remote machine start and so on. Again starts it in completely separate environment (i.e. its own variables) and even a hidden process, xml file with command parameters and so on :
SCHTASKS /create /tn BatRunner /tr "%cd%\first.bat" /sc ONCE /sd 01/01/1910 /st 00:00
SCHTASKS /Run /TN BatRunner
SCHTASKS /Delete /TN BatRunner /F
Here the PID also can acquired from the event log.
ScriptRunner
Offers some timeout between started scripts. Basic transaction capabilities (i.e. rollback on error) and the parameters can be put in a separate XML file.
::if the script is not finished after 15 seconds (i.e. ends with pause) it will be killed
ScriptRunner.exe -appvscript %cd%\first.bat -appvscriptrunnerparameters -wait -timeout=15
::will wait or the first called script before to start the second
:: if any of the scripts exit with errorcode different than 0 will try
:: try to restore the system in the original state
ScriptRunner.exe -appvscript second.cmd arg1 arg2 -appvscriptrunnerparameters -wait -rollbackonerror -appvscript third.bat -appvscriptrunnerparameters -wait -timeout=30 -rollbackonerror
To call a .bat file within a .bat file, use
call foo.bat
(Yes, this is silly, it would make more sense if you could call it with foo.bat, like you could from the command prompt, but the correct way is to use call.)
Simplest Way To Run Multiple Batch Files Parallelly
start "systemLogCollector" /min cmd /k call systemLogCollector.bat
start "uiLogCollector" /min cmd /k call uiLogCollector.bat
start "appLogCollector" /min cmd /k call appLogCollector.bat
Here three batch files are run on separate command windows in a minimized state. If you don't want them minimized, then remove /min. Also, if you don't need to control them later, then you can get rid of the titles. So, a bare-bone command will be- start cmd /k call systemLogCollector.bat
If you want to terminate them, then run these commands-
taskkill /FI "WindowTitle eq appLogCollector*" /T /F
taskkill /FI "WindowTitle eq uiLogCollector*" /T /F
taskkill /FI "WindowTitle eq systemLogCollector*" /T /F
Start msbuild.bat
Start unit-tests.bat
Start deploy.bat
If that doesn't work, replace start with call or try this:
Start msbuild.bat
Goto :1
:1
Start unit-tests.bat
Goto :2
:2
Start deploy.bat
Looking at your filenames, have you considered using a build tool like NAnt or Ant (the Java version). You'll get a lot more control than with bat files.
If you want to open many batch files at once you can use the call command. However, the call command closes the current bat file and goes to another. If you want to open many at once, you may want to try this:
#echo off
start cmd "call ex1.bat&ex2.bat&ex3.bat"
And so on or repeat start cmd "call..." for however many files. This works for Windows 7, but I am not sure about other systems.
Your script should be:
start "msbuild.bat"
start "unit-tests.bat"
start "deploy.bat"
Just use the call command! Here is an example:
call msbuild.bat
call unit-tests.bat
call deploy.bat
With correct quoting (this can be tricky sometimes):
start "" /D "C:\Program Files\ProgramToLaunch" "cmd.exe" "/c call ""C:\Program Files\ProgramToLaunch\programname.bat"""
1st arg - Title (empty in this case)
2nd arg - /D specifies starting directory, can be ommited if want the current working dir (such as "%~dp0")
3rd arg - command to launch, "cmd.exe"
4th arg - arguments to command, with doubled up quotes for the arguments inside it (this is how you escape quotes within quotes in batch)
Running multiple scripts in one I had the same issue. I kept having it die on the first one not realizing that it was exiting on the first script.
:: OneScriptToRunThemAll.bat
CALL ScriptA.bat
CALL ScriptB.bat
EXIT
:: ScriptA.bat
Do Foo
EXIT
::ScriptB.bat
Do bar
EXIT
I removed all 11 of my scripts EXIT lines and tried again and all 11 ran in order one at a time in the same command window.
:: OneScriptToRunThemAll.bat
CALL ScriptA.bat
CALL ScriptB.bat
EXIT
::ScriptA.bat
Do Foo
::ScriptB.bat
Do bar
I know I am a bit late to the party, but here is another way. That is, this method should wait until the first one is done, the second, and so on.
start "" /wait cmd.exe /c msbuild.bat
start "" /wait cmd.exe /c unit-tests.bat
start "" /wait cmd.exe /c deploy.bat
The only issue that may come out of using this method, is that with new instances of cmd.exe being spawned, is that Errorlevel checking is kept within in each instance of cmd.exe.
Or..
start "" /wait call msbuild.bat
start "" /wait call unit-tests.bat
start "" /wait call deploy.bat
Hope this helps.

how to start wget in cmd with start command and show only progress bar?

I want to download a file with wget portable using start command in cmd, with a batch file, but the window looks bad:
#echo off
start /w wget.exe -q -c --show-progress https://cdn.mysql.com//Downloads/MySQLGUITools/mysql-workbench-community-8.0.23-winx64.msi
What should I add to my command, to reduce the window to the size of the progress bar? (and if possible change the black background color and the color of the letters)
The download progress window could be opened with the wanted properties with following command line:
start "Download Progress" /wait %ComSpec% /D /T:fg /C "%SystemRoot%\System32\mode.com CON COLS=80 LINES=1 & wget.exe -q -c --show-progress https://cdn.mysql.com//Downloads/MySQLGUITools/mysql-workbench-community-8.0.23-winx64.msi"
The Windows command processor cmd.exe processing the batch file starts with command start one more command processor referenced with predefined environment variable ComSpec with the options:
/D to disable execution of AutoRun commands from registry,
/T:fg to define the foreground and background color (both 0-9A-F) of the console window,
/C to execute the command line specified next and then close itself.
The options are explained by the usage help output on running cmd /? in an opened command prompt window.
The title for the console window is Download Progress as defined already by start which waits for self-termination of started cmd.exe instance. Run start /? in command prompt window for help on this command.
The command line executed by the started command process first runs command MODE to change the number of columns to 80 and the number of lines to 1, i.e. the additional console window becomes very small. Run mode /? in command prompt window for help on this command.
The small additional console window displays only the progress information of wget.exe which is executed next by the second command processor instance.
See also single line with multiple commands for an explanation of the operator &.

How to avoid closing cmd after running command with win+r?

I press Windows+R to open run dialog box.
Then I write command ipconfig /all and press Enter.
cmd is opened with some network content but it closes immediately.
I want cmd not to close at all without my consent.
I googled that I can run two commands in windows run dialog when I separate them with & or &&. I also found out that pause or set /p= commands would stop cmd from closing. However, ipconfig /all && pause (and all 3 other combinations) fail - cmd still closes and the rest of the command is passed to ipconfig which "returns an error".
Quote Microsoft:
A console is closed when the last process attached to it terminates or calls FreeConsole.
In other words, Win32 console window will always be closed when the last program running inside it exits, and you cannot change this.
Solutions:
call cmd.exe /k first.
example:
cmd.exe /k ipconfig /all
With above trick, we call cmd.exe to execute ipconfig /all. Since cmd.exe not terminated, so the console will not closed.

How to open new cmd window and execute for-loop in it?

I have a test.cmd file with the following command:
call "cmd /c start echo foo && pause"
call "cmd /c start for /l %%x in (0, 1, 2) do python test.py config%%x"
The first command is working fine and shows that the general approach should work. The second one with the for loop gives me troubles.
When I run this command directly in a CMD window (with only one % sign before the iterator), it starts my python script "test.py" in a new CMD window 3 times in a loop as expected.
When I run the same command from my test.cmd (this time with two % of course), the new CMD window pops up and is gone right away. I don't get any error messages and can't get the new window to stay.
I suspect that I need to do some more encoding but I cannot figure out the correct syntax. What must I change to get this for loop to run from my test.cmd?
if you insist on using call, there is another level of parsing, so in a batchfile you have to use:
call "cmd /k start for /l %%%%i in (1,1,10) do echo %%%%i"
(replaced /c with /k to see the output)
try this:
call "cmd /c for /l %x in (0, 1, 2) do #python test.py config%x"
when you execute loops in command prompt you need single percentage symbol.
And you need to remove the start command after the cmd /c because for is internal cmd command. The # is for suppress printing of prompt value on each iteration.
This answer elaborates on the core question stated in the title of your post rather than on the sample code you provided.
To run a for loop in a separate (cmd) window, the start command is needed. In addition, An explicit cmd instance should be given in order to avoid problems with start when calling internal command lines (for instance, parentheses may cause errors), and also to have control over what happens with the new window after the loop has finished.
The following command line runs a for loop in a new cmd window, which remains open after the loop finished (quite helpful for debugging):
start "" /WAIT cmd /K "for /L %%X in (0,1,2) do echo %%X"
Type exit into the new window to close it. To automatically close the new window finally, replace /K by /C.
If you do not want your main (calling) batch script to wait for the loop to finish and the new window to be closed, remove the /WAIT switch. This way the command line is started, but the main script immediately continues executing. This allows you to run multiple for loops in separate windows simultaneously.
This technique is not limited to calling for loops only.

How to start a batch file minimized with task scheduler in Windows 8? - %comspec% method not working anymore after Windows 7

After Windows XP, I always use the trick below to start batch files minimized with Windows Task Manager.
From http://www.pcreview.co.uk/forums/running-bat-files-minimized-scheduler-t2125918.html:
"prequisite: all your batch files have an exit-command to finish the actions off. If you do not exit, you will end with a command prompt blinking.
This is what I keep using:
%comspec% /c start /min "C:\Scripts\Destination_inbound_ftp5.bat"
When you save this in the properties, you will get a follow-up dialogue asking you if you meant all this to be parameters or not. Answer NO and the task will be saved as you would expect.
I also read the Stack Overflow question “start %comspec% /c script.cmd” vs “start cmd /C second.cmd script.cmd”, which made me replace the "%comspec%" statement with "C:\Windows\system32\cmd.exe", but that did not change anything either.
The problem is that now, instead of a minimized running bat file, I end up with just a command prompt, minimized but without any of the batch commands executed. The task scheduler status remains "running" :(
How do I get this done on Windows 8 (64-bit)? Preferrable with old-school batch commands instead of PowerShell (or worse ;p)
The start command needs the leading "" quotes to disable the title feature. Try scheduling this:
%comspec% /c start "" /min "C:\Scripts\Destination_inbound_ftp5.bat" ^& exit
Assuming Windows 8 is the same as Windows 7, an "exit" is only going to exit the batch file (which it is going to do anyway).
You need to add the exit code like this:
Under "Program/Script":
CMD (or command.exe, or %comspec%)
Under "Arguments:
/c start "Title" /min "C:\Scripts\Destination_inbound_ftp5.bat" ^& exit
I didn't like seeing the command window pop up and then disappear so here is another solution from https://ss64.com/vb/run.html ...
First create invisible.vbs with this single line of text:
CreateObject("Wscript.Shell").Run """" & WScript.Arguments(0) & """", 0, False
Next and finally, launch your cmd or batch file via:
%SystemRoot%\system32\wscript.exe "invisible.vbs" "myscript.cmd" //nologo
Ta da! Scripting of this sort has been built into Windows for a long time. If you're curious, do a web search for "WSH" (windows scripting host). You can even write such scripts in dialect of JavaScript called JScript.
Another possibility: a small freeware program named CMDH, that simply runs the requested orders in background.
For example:
cmdh MyScript.cmd
No need to add "exit" to the script.
Tested working in Windows XP SP3, and there is no reason it should fail on Windows 8.
Here's a solution from https://ss64.com/vb/run.html that will run a batch file in a minimized window. Unlike the other solutions that use the start command with /min, this one will not flash a new window onto your screen or interrupt full-screen activities. It does, however, steal focus. I don't know how to avoid that.
First create a file named run_minimized.vbs with this single line of text:
CreateObject("Wscript.Shell").Run """" & WScript.Arguments(0) & """", 2, False
Next, create your Task Scheduler task with an action to start the program wscript.exe with these arguments:
"c:\path\run_minimized.vbs" "c:\path\my script.bat"
Change the paths as necessary to specify the locations of the two files.
There is no simple way to pass arguments from Task Scheduler to the batch file while also preserving spaces and quotation marks, because wscript strips quotation marks from its arguments. The simplest way to handle arguments with spaces would be to put the entire batch file command into the vbs:
CreateObject("Wscript.Shell").Run """c:\path\my script.bat"" ""arg 1"" arg2", 2, False
Note the use of quotation marks. There's one pair of quotation marks " enclosing the entire command string, and a pair of adjacent quote characters "" every place you'd use a normal quotation mark in a command line.
Maybe it's not the same as you mean but if I simply run a .bat file with the scheduler and tick this "Hidden" box on the General tab of the task properties it starts minified.
As already mentioned in foxidrive's answer, the issue is caused by the missing title parameter, which is taken from the first quoted argument string on the command line of the start command, which is the quoted batch file path in your command line. Since there is nothing left to be taken as the command/program to be started, the default cmd.exe is started.
Providing a dummy title (which may even be empty) solves that issue:
%ComSpec% /C start "" /MIN "C:\Scripts\Destination_inbound_ftp5.bat"
However, as mentioned in the help message of start (type start /? into a command prompt window), when the provided command/program is a batch file, the command processor cmd.exe is run with the /K switch, which keeps the command prompt window open:
command/program
If it is an internal cmd command or a batch file then
the command processor is run with the /K switch to cmd.exe.
This means that the window will remain after the command
has been run.
If it is not an internal cmd command or batch file then
it is a program and will run as either a windowed application
or a console application.
To prevent that, let us explicitly specify the command processor with the /C switch:
%ComSpec% /C start "" /MIN %ComSpec% /C "C:\Scripts\Destination_inbound_ftp5.bat"
So there is no additional exit command necessary.

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