使用expect發送多個響應交互式Linux命令

Question

我有以下任務執行。

1. 運行Linux命令「ABC」，它會要求多響應
2. 首先，有多個線，它是要求從1-10中選擇選項。以'run？'結尾，必須選擇1
3. 第二，以'是/否'結束。總是'是'的迴應
4. 三，輸入ID。從一個.txt文件取一個ID作爲輸入。每行有一個ID。
5. 四，y/n。始終選擇「y」作爲迴應。

步驟2-5應循環運行，直到.txt文件中的所有ID都結束，步驟5將選擇「否」或僅退出。

Tried below code in Shell/expect but sometimes it skip the ID's from list or show blank value and sometimes get crash while running and throw error:

*child process exited abnormally 
    while executing 
"exec cat output.txt | grep -i -B2 "rows selected" > result.txt" 
    (file "./cmp-test.sh" line 31)* 

下面是代碼：

exec echo "" > output.txt 
log_file [pwd]/output.txt 
set f [open list.txt r] 
# list is the file name contain ID's 

set idlist [ split [ read $f ] "\n" ] 
close $f 

send_user "\n Running script.. \n" 

spawn <abc command> 
foreach ids $idlist { 
expect { 
    "run? " { send "1\r" } 
} 

expect { 
    "ACDIG: " { send "$ids\r" } 
} 

expect { 
    "n)?" { send "y\r" } 
} 

} 

exec cat output.txt | grep -i -B2 "rows selected" > result.txt 

Answer 1

你也許並不需要期待這樣的：

while read -r id; do 
abc << "answers" 
1 
yes 
$id 
y 
answers 
done < ids.txt 

或

while read -r id; do 
    printf "%s\n" 1 yes "$id" y | abc 
done < ids.txt 

由於grep在其輸入中找不到給定模式，因此grep以非零狀態退出：這是「正常」grep退出狀態，但由於它不爲零，因此Tcl /預計認爲發生了錯誤。

Answer 2

嘗試包括在foreach循環內的spawn。例如：

#!usr/bin/expect 

exec echo "" > output.txt 
log_file -a output.txt 

set f [open list.txt r] 
set idlist [read $f] 
close $f 

send_user "\n Running script.. \n" 

foreach ids $idlist { 
    spawn <abc command> 

    expect "run? " 
    send "1\r" 

    expect "ACDIG: " 
    send "$ids\r" 

    expect "n)?" 
    send "y\r" 
} 

log_file 
catch {exec cat output.txt | grep -i -B2 "rows selected" > result.txt} 

希望在你的第二個額外空白expect不會導致任何問題。

此外，您是否在腳本結尾處關閉了log_file進程？