將錯誤消息重定向到日誌文件中bash

Question

[編輯，因爲發佈的問題是錯誤的] 我需要將此代碼的輸出保存在名爲'logfile'的文件中，並且在該日誌文件中只有計算錯誤。

for f in *.log; do 
awk 'NF && NR>1 && $0!~/total:/ 
{ 
things_cost=$2*$3; 
overalltotal=(overalltotal!="")? overalltotal"+"things_cost : things_cost; 
if(things_cost!=$4) 
{ 
things_er[$1]=things_cost" instead of "$4 
} 
err_t+=$4; t+=things_cost; 
} 
$0~/total/ && err_t 
{ 
print "Error in calculations:"; 
for(i in things_er) 
{ 
print "Things total for "i" is wrong: it should be "things_er[i] 
} 
print "Overalltotal is wrong: It should be "t; next 
}1' "$f" tmpfile && mv tmpfile logfile 
done 

使用上面的代碼，錯誤在日誌文件中以非常不可讀的格式重複。我正在使用下面給出的輸入文件。我需要在日誌文件

Date: 01-01-2007 
    Sold  price total 
thing1 3 7098 22394 
thing2 2 6500 13000 
thing3 20 300 6000 
Overalltotal: 41394 
----------------------------------- 
Date: 04-01-2007 
    Sold  price total 
thing1 10 700 5000 
thing2 48 900 43200 
Overalltotal: 46020 

---

Answer 1

你的awk代碼不輸出任何東西到stderr要打印的日期和錯誤，我猜你想有兩個標準錯誤和標準輸出輸出。要做到這一點，你必須在這裏做以下

(echo "test" | awk '{print $0; print $0." error" | "cat 1>&2" }') > log 2> err_log 

最重要的部分是，你有，你做的每一個錯誤打印後追加| "cat 1>&2"。在awk命令結束時，您必須使用>和2>將stdout重定向到log文件和stderr到err_log文件。

---

這裏是它如何工作的：

echo "\ 
################################# 
Date: 01-01-2007 
thing1 3 7098 22394 
thing2 2 6500 13000 
thing3 20 300 6000 
-------------------------------- 
Date: 04-01-2007 
thing4 10 700 5000 
thing5 48 900 43200 
Overalltotal: 46020 
################################# 
total 89593" > test.csv 

(awk ' 
    !/^#/ && !/^total/ && $2~/[0-9]+/ && $3~/[0-9]+/ && $4~/[0-9]+/ { 
     line_cost = $2*$3 
     real_total += line_cost; 
     precomputed_total += $4; 
     if(line_cost!=$4) 
      errors[NR]="Error (product "$1": line " NR ") line cost is " line_cost" != " $4; 
     print "\t"$0; 
    } 
    /^total/ && length(errors)>0 { 
     print "\tErrors in item totals:" | "cat 1>&2"; 
     for(i in errors) 
      print "\t\t"errors[i] | "cat 1>&2"; 
     if (real_total != precomputed_total) 
     print "\tPre-computed total: "$2 | "cat 1>&2"; 
     print "\tOverall total based on items totals: "precomputed_total | "cat 1>&2"; 
     print "\tOverall total based on items price*quantity: "real_total | "cat 1>&2"; 
    }' test.csv) > log 2> err_log 

echo "Content of log file" 
cat log 
echo "Content of err_log file" 
cat err_log 

輸出如下：

Log: 
    thing1 3 7098 22394 
    thing2 2 6500 13000 
    thing3 20 300 6000 
    thing4 10 700 5000 
    thing5 48 900 43200 
Error log: 
    Errors in item totals: 
     Error (product thing1: line 3) line cost is 21294 != 22394 
     Error (product thing4: line 8) line cost is 7000 != 5000 
    Pre-computed total: 89593 
    Overall total based on items totals: 89594 
    Overall total based on items price*quantity: 90494