我正在尝试将最后一行添加到我正在创建的文件中.如何在END之前检测awk中文件的最后一行？我需要这样做,因为变量在END块中不起作用,
所以我试图避免使用END. @H_404_2@awk ' { do some things..; add a new last line into file;}'
所以我试图避免使用END. @H_404_2@awk ' { do some things..; add a new last line into file;}'
在END之前,我不希望这样：
@H_404_2@awk 'END{print "something new" >> "newfile.txt"}'
一种选择是使用getline函数来处理文件.它在成功时返回1,在文件末尾返回0,在出错时返回-1.
@H_404_2@awk '
FNR == 1 {
## Process first line.
print FNR ": " $0;
while ( getline == 1 ) {
## Process from second to last line.
print FNR ": " $0;
}
## Here all lines have been processed.
print "After last line";
}
' infile
原文链接：https://www.f2er.com/bash/385279.html假设有这些数据：
@H_404_2@one two three four five输出将是：
@H_404_2@1: one 2: two 3: three 4: four 5: five After last line