bash 脚本可以同时运行命令然后等待它们完成吗？
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Can a bash script run simultaneous commands then wait for them to complete?
提问by Colin
I want to write a bash script where I run two commands simultaneously, then continue when they both complete.
我想编写一个 bash 脚本，在其中同时运行两个命令，然后在它们都完成后继续。
Here's something that doesn't work, but I'll put it here to illustrate what I'm trying to do:
这里有一些不起作用的东西，但我会把它放在这里来说明我正在尝试做的事情：
#!/bin/bash
./job1 &
./job2
./dostuffwithresults
The script will run both job1 and job2 at the same time, but will only wait for job2 to finish before continuing. If job1 takes longer, then the results might not be ready for the final command.
该脚本将同时运行 job1 和 job2，但在继续之前只会等待 job2 完成。如果 job1 需要更长的时间，则结果可能无法用于最终命令。
回答by Michael Krelin - hacker
j1 &
j2 &
j3 &
wait $(jobs -p)
dostuffwithresults
回答by Harry Forbess
something like this should work
这样的事情应该工作
#!/bin/bash
while [ `pgrep job*` ]
do
echo 'waiting'
done
./dostuffwithresults
