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Full Discussion: split a filename and print to 2 different headings
Operating Systems AIX split a filename and print to 2 different headings Post 302246402 by bakunin on Monday 13th of October 2008 02:43:42 PM
Old 10-13-2008
There are several possibilities to achieve this: all these filenames are of the form

<first_part><delimiter><second_part>

and you want to split them at <delimiter>. This chan be achieved by:

1. using shell means

${varname#*<delimiter>} will expand to the part of varname following delimiter
${varname%<delimiter>*} will expand to the part of varname preceeding delimiter

Example:
Code:
a="abc|def"
print - ${a#*|}    # will yield "def"
print - ${a%|*}    # will yield "abc"

2. using cut

You can use "cut" to split a string at some "field boundaries" delimited by a delimiter character. Quite commonly this is a blank but this doesn't have to be so. See the manpage for "cut" for details:

Code:
a="abc|def"
print - $a | cut -d'|' -f1    # will yield "abc"
print - $a | cut -d'|' -f2    # will yield "def"

This would be the preferential method when you have to split your variable not one but several times. In this case you could split to "field" 3,4,5, etc..

3. using sed/awk

You could use sed or awk to split your variables content into parts. This would be the least preferable method as it would be an overkill for such a problem.

Code:
a="abc|def"
print - $a | sed 's/|.*$//'    # will yield "abc"
print - $a | sed 's/^.*|//'    # will yield "def"

After having split your variables into parts you can use "printf" to print the parts as column headers in a table. "printf" has also a manpage and works almost identical to the standard C function printf().

I hope this helps.

bakunin
 

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LEARN ABOUT NETBSD

split

SPLIT(1)						    BSD General Commands Manual 						  SPLIT(1)

NAME

     split -- split a file into pieces

SYNOPSIS

     split [-a suffix_length] [-b byte_count[k|m] | -l line_count -n chunk_count] [file [name]]

DESCRIPTION

     The split utility reads the given file and breaks it up into files of 1000 lines each.  If file is a single dash or absent, split reads from
     the standard input.  file itself is not altered.

     The options are as follows:

     -a      Use suffix_length letters to form the suffix of the file name.

     -b      Create smaller files byte_count bytes in length.  If 'k' is appended to the number, the file is split into byte_count kilobyte
	     pieces.  If 'm' is appended to the number, the file is split into byte_count megabyte pieces.

     -l      Create smaller files line_count lines in length.

     -n      Split file into chunk_count smaller files.

     If additional arguments are specified, the first is used as the name of the input file which is to be split.  If a second additional argument
     is specified, it is used as a prefix for the names of the files into which the file is split.  In this case, each file into which the file is
     split is named by the prefix followed by a lexically ordered suffix using suffix_length characters in the range ``a-z''.  If -a is not speci-
     fied, two letters are used as the suffix.

     If the name argument is not specified, 'x' is used.

STANDARDS

     The split utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY

     A split command appeared in Version 6 AT&T UNIX.

     The -a option was introduced in NetBSD 2.0.  Before that, if name was not specified, split would vary the first letter of the filename to
     increase the number of possible output files.  The -a option makes this unnecessary.

BSD
								   May 28, 2007 							       BSD
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