由于这个线程的主要目的是如何在 NON GNU 中进行就地保存，awk所以我首先发布它的模板，这将帮助任何有任何要求的人，他们需要在他们的代码中添加/附加BEGIN和END部分，以保持他们的主块按照他们的要求，然后它应该进行就地编辑：
注意： Following 会将其所有输出写入 output_file，因此如果您想将任何内容打印到标准输出，请仅添加print...语句而不> (out)在 following 中。
通用模板：
awk -v out_file="out" '
FNR==1{
close(out)
out=out_file count++
rename=(rename?rename ORS:"") "mv \047" out "\047 \047" FILENAME "\047"
}
{
.....your main block code.....
}
END{
if(rename){
system(rename)
}
}
' *.txt
具体提供的样品解决方案：
我自己提出了以下方法awk（对于添加的示例，以下是我解决此问题并将输出保存到 Input_file 本身的方法）
awk -v out_file="out" '
FNR==1{
close(out)
out=out_file count++
rename=(rename?rename ORS:"") "mv \047" out "\047 \047" FILENAME "\047"
}
{
print FNR > (out)
}
END{
if(rename){
system(rename)
}
}
' *.txt
注意：这只是将编辑后的输出保存到 Input_file(s) 本身的测试，可以在程序中使用其 BEGIN 部分及其 END 部分，主要部分应根据特定问题本身的要求。
公平警告：此外，由于这种方法在路径中创建了一个新的临时输出文件，因此更好地确保我们在系统上有足够的空间，尽管在最终结果中这将只保留主 Input_file(s)，但在操作期间它需要系统/目录上的空间
以下是对上述代码的测试。
以示例执行程序：假设以下是.txtInput_file(s)：
cat << EOF > test1.txt
onetwo three
tets testtest
EOF
cat << EOF > test2.txt
onetwo three
tets testtest
EOF
cat << EOF > test3.txt
onetwo three
tets testtest
EOF
现在当我们运行以下代码时：
awk -v out_file="out" '
FNR==1{
close(out)
out=out_file count++
rename=(rename?rename ORS:"") "mv \047" out "\047 \047" FILENAME "\047"
}
{
print "new_lines_here...." > (out)
}
END{
if(rename){
system("ls -lhtr;" rename)
}
}
' *.txt
注意：我ls -lhtr在system部分中查看它正在创建哪些输出文件（临时），因为稍后它会将它们重命名为它们的实际名称。
-rw-r--r-- 1 runner runner 27 Dec 9 05:33 test2.txt
-rw-r--r-- 1 runner runner 27 Dec 9 05:33 test1.txt
-rw-r--r-- 1 runner runner 27 Dec 9 05:33 test3.txt
-rw-r--r-- 1 runner runner 38 Dec 9 05:33 out2
-rw-r--r-- 1 runner runner 38 Dec 9 05:33 out1
-rw-r--r-- 1 runner runner 38 Dec 9 05:33 out0
当我们执行脚本完成运行ls -lhtr后awk ，我们只能看到.txt其中的文件。
-rw-r--r-- 1 runner runner 27 Dec 9 05:33 test2.txt
-rw-r--r-- 1 runner runner 27 Dec 9 05:33 test1.txt
-rw-r--r-- 1 runner runner 27 Dec 9 05:33 test3.txt
说明：在此处添加上述命令的详细说明：
awk -v out_file="out" ' ##Starting awk program from here, creating a variable named out_file whose value SHOULD BE a name of files which are NOT present in our current directory. Basically by this name temporary files will be created which will be later renamed to actual files.
FNR==1{ ##Checking condition if this is very first line of current Input_file then do following.
close(out) ##Using close function of awk here, because we are putting output to temp files and then renaming them so making sure that we shouldn't get too many files opened error by CLOSING it.
out=out_file count++ ##Creating out variable here, whose value is value of variable out_file(defined in awk -v section) then variable count whose value will be keep increment with 1 whenever cursor comes here.
rename=(rename?rename ORS:"") "mv \047" out "\047 \047" FILENAME "\047" ##Creating a variable named rename, whose work is to execute commands(rename ones) once we are done with processing all the Input_file(s), this will be executed in END section.
} ##Closing BLOCK for FNR==1 condition here.
{ ##Starting main BLOCK from here.
print "new_lines_here...." > (out) ##Doing printing in this example to out file.
} ##Closing main BLOCK here.
END{ ##Starting END block for this specific program here.
if(rename){ ##Checking condition if rename variable is NOT NULL then do following.
system(rename) ##Using system command and placing renme variable inside which will actually execute mv commands to rename files from out01 etc to Input_file etc.
}
} ##Closing END block of this program here.
' *.txt ##Mentioning Input_file(s) with their extensions here.