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Top Forums UNIX for Beginners Questions & Answers Inserting n characters to beginning of line if match Post 303007725 by jvoot on Monday 20th of November 2017 05:35:25 PM
Old 11-20-2017
Thank you so much for this Don. In reviewing your code, I left things a bit ambiguous in my original post. I meant to say either 125 spaces or *125* dashes ("-"). I very much like the elegance of:

Code:
awk '/^@/{$0 = "-" $0}1' file

Is there a way that awk can be told to do 125 of the leading "-"? Or is the only solution to substitute "-" for "/s" in:

Code:
awk '{printf("%*s\n", 125 * (substr($0, 1, 1) == "@") + length, $0)}' file

Thus:
Code:
awk '{printf("%*-n", 125 * (substr($0, 1, 1) == "@") + length, $0)}' file

 

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CUT(1)							      General Commands Manual							    CUT(1)

NAME
cut - select out columns of a file SYNOPSIS
cut [ -b | -c] list [file...] cut -f list [-d delim] [ -s] OPTIONS
-b Cut specified bytes -c Select out specific characters -d Change the column delimiter to delim -f Select out specific fields that are separated by the -i Runs of delimiters count as one -s Suppres lines with no delimiter characters, when used EXAMPLES
cut -f 2 file # Extract field 2 cut -c 1-2,5 file # Extract character columns 1, 2, and 5 cut -c 1-5,7- file # Extract all columns except 6 DESCRIPTION
[file...]" delimiter character ( see delim)" with the -f option. Lines with no delimiters are passwd through untouched" Cut extracts one or more fields or columns from a file and writes them on standard output. If the -f flag is used, the fields are sepa- rated by a delimiter character, normally a tab, but can be changed using the -d flag. If the -c flag is used, specific columns can be specified. The list can be comma or BLANK separated. The -f and -c flags are mutually exclusive. Note: The POSIX1003.2 standard requires the option -b to cut out specific bytes in a file. It is intended for systems with multi byte characters (e.g. kanji), since MINIX uses only one byte characters, this option is equivalent to -c. For the same reason, the option -n has no effect and is not listed in this man- ual page. SEE ALSO
sed(1), awk(9). CUT(1)
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