我想写一个bash脚本，使用aspell来检查拼写检查文件

Question

我手边有以下脚本，我认为有错误但我没有修复它们的知识。问题是脚本没有返回任何内容，但它应该返回拼写错误的单词。我运行此脚本使用此命令

$ sh ./action.sh "{\"b64\":\"`base64 input.txt`\" }" 

input.txt中有6个字： 猫狗 elephent狮 mooose错误

，并返回

{ "result": "" } 

，但我想它返回

{ "result": "elephent mooose " } 

#!/bin/bash 
# 
# This script expects one argument, a String representation of a JSON 
# object with a single attribute called b64. The script decodes 
# the b64 value to a file, and then pipes it to aspell to check spelling. 
# Finally it returns the result in a JSON object with an attribute called 
# result 
# 
FILE=/home/user/output.txt 

# Parse the JSON input ($1) to extract the value of the 'b64' attribute, 
# then decode it from base64 format, and dump the result to a file. 
echo $1 | sed -e 's/b64.://g' \ 
     | tr -d '"' | tr -d ' ' | tr -d '}' | tr -d '{' \ 
     | base64 --decode >&2 $FILE 

# Pipe the input file to aspell, and then format the result on one line with 
# spaces as delimiters 
RESULT=`cat $FILE | aspell list | tr '\n' ' ' ` 

# Return a JSON object with a single attribute 'result' 
echo "{ \"result\": \"$RESULT\" }" 

Answer 1

I t这个问题是关于重定向的。我改变了>&2 $FILE到> $FILE 2>&1 然后它工作。 （我不知道为什么第一个是不正常）

这里是输出：

yavuz@ubuntu:/tmp$ sh ./action.sh "{\"b64\":\"`base64 input.txt`\" }" 
{ "result": "elephent mooose " } 

代码：

#!/bin/bash 
# 
# This script expects one argument, a String representation of a JSON 
# object with a single attribute called b64. The script decodes 
# the b64 value to a file, and then pipes it to aspell to check spelling. 
# Finally it returns the result in a JSON object with an attribute called 
# result 
# 
FILE=/tmp/output.txt 

# Parse the JSON input ($1) to extract the value of the 'b64' attribute, 
# then decode it from base64 format, and dump the result to a file. 
echo $1 | sed -e 's/b64.://g' \ 
     | tr -d '"' | tr -d ' ' | tr -d '}' | tr -d '{' \ 
     | base64 --decode > $FILE 2>&1 

# Pipe the input file to aspell, and then format the result on one line with 
# spaces as delimiters 
RESULT=`cat $FILE | aspell list | tr '\n' ' ' ` 

# Return a JSON object with a single attribute 'result' 
echo "{ \"result\": \"$RESULT\" }"