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Operating Systems AIX Pattern to replace ^M and ^Y in a 4.2 AIX text file Post 302317665 by Browser_ice on Tuesday 19th of May 2009 02:12:47 PM
Old 05-19-2009
Quote:
Originally Posted by bakunin
In your example it looks like you have groups of 3 lines of text followed by 2 lines. You want to combine the three lines of text into a single line and remove the two separating lines completely.

If this is the case:

Code:
sed -n 'N;N;s/[^M^Y]//g;s/\n//gp;N;N

This will first read two additional lines (to the first read line) from the file and combine these into the pattern space. The first replacement then throws out the control characters (^M and ^Y, enter them via <CTRL-V> in vi), the second replacement removes the newline characters combining the lines to one line and prints it. Then two additional lines (the separator lines) are read and discarded, since they are not printed at all, then repeat from start.

I hope this helps.

bakunin
What if the number of lines of the original file is unknown ?

In my example I gave 3 lines but it can be anything between 1 and 20 lines. The file contains any multi-line amount of records. Each records is totally independent from the previous one. One record could have 2 lines, the next 20, the next 5, ... No regular patterns for the amount of lines. The file contains a list of system generated alarms coming from 20 different servers, numerous amount of workstations, ...

Sorry I forgot to mention it.
 

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fmt(1)								   User Commands							    fmt(1)

NAME
fmt - simple text formatters SYNOPSIS
fmt [-cs] [-w width | -width] [inputfile...] DESCRIPTION
fmt is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the -w width option. The default width is 72. fmt concatenates the inputfiles listed as arguments. If none are given, fmt formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. fmt does not fill nor split lines beginning with a `.' (dot), for compatibility with nroff(1). Nor does it fill or split a set of contiguous non-blank lines which is determined to be a mail header, the first line of which must begin with "From". Indentation is preserved in the output, and input lines with differing indentation are not joined (unless -c is used). fmt can also be used as an in-line text filter for vi(1). The vi command: !}fmt reformats the text between the cursor location and the end of the paragraph. OPTIONS
-c Crown margin mode. Preserve the indentation of the first two lines within a paragraph, and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. -s Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such formatted text, from being unduly combined. -w width | -width Fill output lines to up to width columns. OPERANDS
inputfile Input file. ENVIRONMENT VARIABLES
See environ(5) for a description of the LC_CTYPE environment variable that affects the execution of fmt. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
nroff(1), vi(1), attributes(5), environ(5) NOTES
The -width option is acceptable for BSD compatibility, but it may go away in future releases. SunOS 5.10 9 May 1997 fmt(1)
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