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Full Discussion: Breaking long lines into (characters, newline, space) groups
Top Forums Shell Programming and Scripting Breaking long lines into (characters, newline, space) groups Post 302316390 by rowie718 on Friday 15th of May 2009 12:31:52 AM
Old 05-15-2009
Thank you so much for your help cfajohnson!

I put together your suggestions and tested them. Its almost there, but there were 2 problems. The first I fixed fairly easily. The 79th character is the newline in the orignal ldif, so I shouldve expressed it as wanting 78 characters. I deducted 1 from anywhere I saw 79 or 80 in your awk command and that seemed to do the trick. The second problem is trickier. Take a 240 character line as an example. When the awk command breaks it, and adds the space in the second chunk, it does not take into account that the last character of that second chunk should be at the same ending position as the first chunk. As it is currently written, all chunks after the first break align 1 character to the right because of the space.

Example:
Code:
123456789012345678901234567890.....(240 character long string repeating)

currently breaks into :
123456789012345678901234567890123456789012345678901234567890123456789012345678
 901234567890123456789012345678901234567890123456789012345678901234567890123456
 789012345678901234567890123456789012345678901234567890123456789012345678901234
 567890

but should actually end up more like this, so that every line has 78 characters, 
plus newline (including the space we've added):

123456789012345678901234567890123456789012345678901234567890123456789012345678
 90123456789012345678901234567890123456789012345678901234567890123456789012345
 67890123456789012345678901234567890123456789012345678901234567890123456789012
 34567890

The script currently looks like this:

#!/bin/ksh

echo "where is the ldif file located that you would like to parse?"
read ldiffile

awk 'length > 78 { while ( length($0) > 78 ) {
    printf "%s\n ", substr($0,1,78)
    $0 = substr($0,79)
  }
  if (length) print
  next
}
{print}' $ldiffile > /out.txt

Thanks again for your help, I really appreciate it.
 

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LEARN ABOUT SUSE

slapd-ldif

SLAPD-LDIF(5)							File Formats Manual						     SLAPD-LDIF(5)

NAME

       slapd-ldif - LDIF backend to slapd

SYNOPSIS

       /etc/openldap/slapd.conf

DESCRIPTION

       The  LDIF  backend  to slapd(8) is a basic storage backend that stores entries in text files in LDIF format, and exploits the filesystem to
       create the tree structure of the database.  It is intended as a cheap, low performance easy to use backend, and it is exploited by  higher-
       level internal structures to provide a permanent storage.

CONFIGURATION

       These  slapd.conf  options apply to the LDIF backend database.  That is, they must follow a "database ldif" line and come before any subse-
       quent "backend" or "database" lines.  Other database options are described in the slapd.conf(5) manual page.

       directory <dir>
	      Specify the directory where the database tree starts.  The directory must exist and grant appropriate permissions (rwx) to the iden-
	      tity slapd is running with.

ACCESS CONTROL

       The  LDIF  backend  does  not  honor  any of the access control semantics described in slapd.access(5).	Only read (=r) access to the entry
       pseudo-attribute and to the other attribute values of the entries returned by the search operation is honored, which is	performed  by  the
       frontend.

FILES

       /etc/openldap/slapd.conf
	      default slapd configuration file

SEE ALSO

       slapd.conf(5), slapd-config(5), slapd(8), ldif(5).

AUTHOR

       Eric Stokes

OpenLDAP 2.4.21 						    2009/12/20							     SLAPD-LDIF(5)
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