并行调用多个 bash 函数
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parallel call multiple bash functions
提问by p4guru
I have read the example at http://www.gnu.org/software/parallel/man.html#example__calling_bash_functionshowever, is it possible to use gnu parallel to call 2 functions which do not have any variables you pass to them ?
我已经阅读了http://www.gnu.org/software/parallel/man.html#example__calling_bash_functions 上的示例，但是，是否可以使用 gnu parallel 来调用 2 个没有传递给它们的变量的函数？
example
例子
a() {
echo "download a"
wget fileA
}
b() {
echo "download b"
wget fileB
}
and use parallel to call both functions a& b?
并使用 parallel 调用两个函数a& b?
回答by Thirupathi Thangavel
Run them in background. And then wait for them to complete.
在后台运行它们。然后等待它们完成。
a() {
echo "download a"
wget fileA
}
b() {
echo "download b"
wget fileB
}
a &
b &
wait # waits for all background processes to complete
回答by Ole Tange
If you insist on using GNU Parallel:
如果您坚持使用 GNU Parallel：
a() {
echo "download a"
wget fileA
}
b() {
echo "download b"
wget fileB
}
export -f a
export -f b
parallel ::: a b
