中国DOS联盟

@echo on

:loop

set /a c+=1

start /i /min ping -n 2 172.16.1.%c% && echo 172.16.1.%c% >>b:\ip.txt


if "%c%"=="20" exit

goto :loop


The above code fails to put the PING -successful IPs into ip.txt. Who can tell me why?

Last edited by 429499381 on 2007-8-14 at 03:22 PM ]

Who knows how to make multi-threading and retain part of the results!! For example, opening 20 windows to PING, and putting the ones that PING successfully into 1.txt

But after using start /i, the newly opened window cannot realize the connection of commands at the same time!!

start /i tasklist & pause In which pasue cannot be passed in the new environment!!

Is there a solution??

Just don't use the start command.

How to achieve simulating multi-threads without using START?? Give some hints!!! I just tested again
The following P processing can simulate multi-threads, but cannot exit!! Hey!

set a=
:loop
set /a a+=1
cmd /c start echo %a% >>e:\%a%.txt
if "%a%"=="5" exit
goto :loop

set a=
:loop
set /a a+=1
echo %a% >>e:\%a%.txt
if "%a%"=="5" exit
goto :loop
This is okay
@echo on

:loop
set /a c+=1
ping -n 2 172.16.1.%c% && echo 172.16.1.%c% >>b:\ip.txt
if "%c%"=="20" exit
goto :loop
This is also correct. If you execute the command start /i /min ping -n 2 172.16.1.%c% && echo 172.16.1.%c% >>b:\ip.txt, the system will open a new window to execute ping -n 2 172.16.1.%c% and then immediately execute echo 172.16.1.%c% >>b:\ip.txt without waiting for the result. So your BAT will be wrong!
That is to say: start /i /min ping -n 2 172.16.1.%c% && echo 172.16.1.%c% >>b:\ip.txt
is equivalent to:
start /i /min ping -n 2 172.16.1.%c%
echo 172.16.1.%c% >>b:\ip.txt

I know what you're talking about, and I've also experimented with it!!

I want to know how to simulate multi-threading or what methods there are to make

START pass more than 2 commands in a new environment!!!

I don't know if my expression is clear enough!!! Is there a solution? Give some hints!!!

echo ping -n 2 172.16.1.%%1 ^&^& echo 172.16.1.%%1 ^>^>b:\ip.txt ^&exit>tmp.bat

:loop

set /a c+=1

start /i /min tmp.bat %c%

if "%c%"=="20" ping -n 5 127.1 &del tmp.bat&exit

goto :loop

START cannot pass more than 2 commands in the new environment, but you can use the following method to solve your problem

echo ping -n 2 172.16.1.%%1 ^&^& echo 172.16.1.%%1 ^>^>b:\ip.txt ^&exit>tmp.bat

:loop

set /a c+=1

start /i /min tmp.bat %c%

if "%c%"=="20" ping -n 5 127.1 &del tmp.bat&exit

goto :loop

set a=

:loop 

set /a a+=1

start cmd /c &echo %a% >>%a%.txt 

pause

if "%a%"=="5" exit

goto :loop 

What are the requirements of the LZ?
Like this?

set a=

:loop 

set /a a+=1

start cmd /c &echo %a% >>%a%.txt 

pause

if "%a%"=="5" exit

goto :loop 

Last edited by ccwan on 2007-8-14 at 09:34 AM ]

The requirement of floor 10 is met, thank you so much. I've been seeking it for 4 days and experimented for 6 hours without result, finally waiting for you.

I tried CMD /C START, why didn't I think of trying START CMD /C??

Still not proficient enough in DOS!!!

The only advantage is 100% CPU!! Originally wanted to write a batch processing to query with WMIC whether there is illegal online, but later found that some new XP systems can never query the remote process name!! Always access denied!!

Puzzled, probably didn't enable RPC remote procedure call!!

ccwan
Why is that?
set a=
:loop
set /a a+=1
start cmd /c &echo %a% >>%a%.txt
pause
if "%a%"=="5" exit
goto :loop

After adding & after START CMD /C can achieve my effect!! Why is this???

It's very simple. After adding &, the command echo %a% >>%a%.txt is executed in this window, and the newly opened window executes the next cmd /c command.

What you have to love is very right