awk to provide extra space?

can s开发者_如何学Pythonome one please tell me, how can I write a awk program to provide extra space at the end of a line if required. So that the line length is maintained at 127 ?

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A %-127s format specifier pads a string to 127 characters:

awk '{printf "%-127s\n", $0}'

You could also do this in straight bash:

while read LINE; do printf "%-127s\n" "$LINE"; done