linux下Shell中調用/引用/包含指令檔方法

指令碼 first (測試樣本1)

代碼如下	複製代碼
#!/bin/bash echo 'your are in first file'

 

問）在當前指令檔中調用另外一個指令檔？

方法一： 使用 source

指令碼 second (測試樣本2)

代碼如下	複製代碼
#!/bin/bash echo 'your are in second file' source first

 

方法二： 使用 .

代碼如下	複製代碼
指令碼 second (測試樣本3) #!/bin/bash echo 'your are in second file' . first

 
source filename和 . filename 應該是同一回事，都是在*當前*Shell環境中執行指令碼。也可以使用sh filename，那是在當前Shell的子Shell中執行指令碼。

可以通過下面這兩個指令碼來體會三種調用方式的不同:

代碼如下

複製代碼

1.sh #!/bin/bash A=B echo "PID for 1.sh before exec/source/fork:$$" export A echo "1.sh: $A is $A" case $1 in exec) echo "using exec…" exec ./2.sh ;; source) echo "using source…" . ./2.sh ;; *) echo "using fork by default…" ./2.sh ;; esac echo "PID for 1.sh after exec/source/fork:$$" echo "1.sh: $A is $A" 2.sh #!/bin/bash echo "PID for 2.sh: $$" echo "2.sh get $A=$A from 1.sh" A=C export A echo "2.sh: $A is $A"     執行情況： $ ./1.sh PID for 1.sh before exec/source/fork:5845364 1.sh: $A is B using fork by default… PID for 2.sh: 5242940 2.sh get $A=B from 1.sh 2.sh: $A is C PID for 1.sh after exec/source/fork:5845364 1.sh: $A is B $ ./1.sh exec PID for 1.sh before exec/source/fork:5562668 1.sh: $A is B using exec… PID for 2.sh: 5562668 2.sh get $A=B from 1.sh 2.sh: $A is C $ ./1.sh source PID for 1.sh before exec/source/fork:5156894 1.sh: $A is B using source… PID for 2.sh: 5156894 2.sh get $A=B from 1.sh 2.sh: $A is C PID for 1.sh after exec/source/fork:5156894 1.sh: $A is C $