windows 等待命令完成
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Wait For Commands to Finish
提问by anderson
I have a Windows batch file that starts other batch files. How do I wait for all the other batch files to finish before executing somthing in the first batch? I can't use /wait because I need the other commands to run in parallel.
我有一个启动其他批处理文件的 Windows 批处理文件。在第一批中执行某些内容之前，如何等待所有其他批处理文件完成？我不能使用 /wait，因为我需要其他命令并行运行。
回答by Aacini
You may use several flag files, one per running Batch file. For example:
您可以使用多个标志文件，每个运行的批处理文件一个。例如：
First batch file create Flagfile.1 when enter, and delete it before end, and the same way the rest of concurrent batch files (Flagfile.2,...)
第一个批处理文件在输入时创建Flagfile.1，并在结束前删除它，其余并发批处理文件（Flagfile.2，...）的方式相同
The main file just must wait for all flagfiles disappear. For example, in Main file:
主文件必须等待所有标志文件消失。例如，在主文件中：
start Batch1
start Batch2
.....
:wait
if exist flagfile.* goto wait
In any Batch file, for example Batch1:
在任何批处理文件中，例如 Batch1：
echo %time% > flagfile.1
echo Do my process...
del flagfile.1
exit
回答by woohoo
My suggestion is to use CALLcommand. An example from Batch Files:
我的建议是使用CALL命令。批处理文件中的一个示例：
Batch1.bat listing:
Batch1.bat 列表：
REM Batch1.bat
SET ABC=1
CALL BATCH2.BAT %ABC%
ECHO ABC = %ABC%
BATCH2.BAT %ABC%
ECHO ABC = %ABC%
where Batch2.bat listing is:
其中 Batch2.bat 列表是：
REM Batch2.bat
SET ABC=%ABC%%1
EDIT:编辑：根据@Andriy M 的反馈，这里是两个批次的改进版本：
Batch 1:
第 1 批：
@ECHO OFF
REM Batch1.bat
SET ABC=1
CALL batch2.bat %ABC%
ECHO 1. ABC = %ABC%
CALL batch2.bat %ABC% REM test this line with CALL and without
ECHO 2. ABC = %ABC%
Batch 2:
第 2 批：
@ECHO OFF
REM Batch2.bat
SET tmout=5
echo sleeping %tmout% seconds...
REM this introduces a timeout by using a nonexistent ip address
PING 1.2.1.2 -n 1 -w %tmout%000 > NUL
echo done sleeping
SET ABC=%ABC%%1
See the line in batch1 where I wrote the comment test this line with CALL and without. Run that batch twice, with that line having CALLand without CALL.
请参阅 batch1 中的行，其中我使用 CALL 和不使用. 运行该批次两次，该行有CALL和没有CALL.
The output from console withoutCALL:
控制台的输出没有CALL：
C:\temp>batch1.bat
sleeping 5 seconds...
done sleeping
1. ABC = 11
sleeping 5 seconds...
done sleeping
And now the output from console withCALL:
而现在，从控制台输出有CALL：
C:\temp>batch1.bat
sleeping 5 seconds...
done sleeping
1. ABC = 11
sleeping 5 seconds...
done sleeping
2. ABC = 1111
Please note the difference: we get the 2nd echo, q.e.d.
请注意不同之处：我们得到第二个回声，qed
