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command-line filter converting to or from a CSV stream
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uncsv.1

README

NAME
     uncsv -- convert to or from a CSV stream

SYNOPSIS
     uncsv [-hV] [-d delimiter] [-n repl] [-r repl] [file ...]
     csv [-hVsSqQ] [-d delimiter] [-n repl] [-r repl] [file ...]

DESCRIPTION
     uncsv is a filter command converting the lines of a CSV file into non-
     escaped, non-quoted delimited file (pipe by default). This program will
     error out if it encounters a character matching the delimiter, it will
     also replace the carriage return and new-line characters found in quoted
     values allowing you to use awk to play with your CSVs.

     csv is the opposite of this command. It takes an unquoted stream of val-
     ues, separated by the delimiter of your choice (default: pipe '|') and
     produces a "standard" CSV file.

     Both tools avoid end-of-line character politics and will leave these
     untouched, if your file comes with both carriage returns and new-line
     characters (\r\n a.k.a. CRLF), uncsv will leave them as-is.

     The options are as follows:

     -d delimiter
	     Specify the output delimiter for uncsv and the input delimiter
	     for csv , defaults to the pipe character '|'.  uncsv interrupts
	     if the delimiter is found in the input data.

     -n repl
	     If specified, all the new-line characters (a.k.a. line feed or
	     \n) will be replaced by this replacement string.  uncsv replaces
	     them by spaces by default which is destructive.  csv will do the
	     opposite and replace this pattern by an actual new line charac-
	     ter.

     -r repl
	     If specified, all the carriage return characters (a.k.a. \r) will
	     be replaced by this replacement string.  uncsv replaces them by
	     spaces by default which is destructive.  csv will do the opposite
	     and replace this pattern by an actual carriage return character.

     -s      Quote all fields with bordering spaces or tabs (heading or trail-
	     ing). This is only applicable when generating the CSV stream.

     -S      Quote all fields containing spaces or tabs (heading or trailing).
	     This is only applicable when generating the CSV stream.

     -q      Quote all fields with a non-empty value. This is only applicable
	     when generating the CSV stream.

     -Q      Quote everything, even empty fields. This is only applicable when
	     generating the CSV stream.

     -V      Print version.

     -h      Print usage.

EXAMPLES
     Print the second field of a CSV:

	   uncsv file.csv | cut -d'|' -f 2

     Convert a CSV to un-quoted tab-delimited format:

	   uncsv -d' ' < file.csv > delimited

     Convert a PostgreSQL output to CSV:

	   psql yourdb
	   psql> \f\a
	   psql> \o | csv > /tmp/output.csv
	   psql> select * from candies;
	   psql> \o

     Print the first line of the third field:

	   uncsv -n '~LF~' file.csv | cut -d'|' -f 3 | sed 's/~LF~.*//g'

     Convert your /etc/passwd to CSV.

	   csv -d: < /etc/passwd

BUGS
     csv has a 64KB limit on line size.

SEE ALSO
     awk(1), cut(1)

AUTHORS
     uncsv was written by Bertrand Janin <b@janin.com> and is distributed
     under an ISC license (BSD, MIT and OSI compatible).

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