bash 如何配置对话框bash的取消按钮？
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how can i configure the cancel button of dialog box bash?
提问by Fimo
for example i would like to configure the cancel button of this dialog box.
例如我想配置这个对话框的取消按钮。
dialog --backtitle "Dialog - Form sample" \
--form " Form Test - use [up] [down] to select input field " 21 70 18 \
"Network-ID:" 2 2 "" 2 15 20 0\
"Subnet Mask:" 4 2 "" 4 15 20 0\
how can i do this ?
我怎样才能做到这一点 ？
回答by Jukka Paulin
Also, note that the interpretation of $? as to "Whether Cancel was chosen" can be the other way around:
另外，请注意 $? 至于“是否选择取消”可以反过来：
When 'Cancel' was chosen, only then is $? -eq 1 and on the other hand, when a proper menu choice was chosen, $? is 0 (and the choice itself is in another variable that you define yourself).
When 'Cancel' was chosen, only then is $? -eq 1 and on the other hand, when a proper menu choice was chosen, $? 是 0（并且选择本身在您自己定义的另一个变量中）。
Example code:
示例代码：
exec 3>&1
result=$(dialog --title "Choose action from menu" \
--menu "\n Use arrows - UP/DOWN \n\
Press [Enter] to select\n" 20 40 10 \
"I" "Installation" \
"S" "Check system" \
"X" "eXit" 2>&1 1>&3);
Now the dialog by default also shows a OK and Cancel buttons.
现在默认情况下对话框还显示确定和取消按钮。
If user has chosen "OK", then $? = 0, and $result = 'I' or 'S' or 'X' If user has chosen "Cancel", $? = 1, and the $result was undefined ('')
如果用户选择了“OK”，那么 $? = 0, and $result = 'I' or 'S' or 'X' 如果用户选择了“取消”，$? = 1，并且 $result 未定义 ('')
My 'dialog --version' is 1.3-20160209
我的“对话框 --version”是 1.3-20160209
