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Bashe "HERE" help

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Top Forums Shell Programming and Scripting Bashe "HERE" help
# 1  
Old 03-01-2012
Bashe "HERE" help
I'm trying to enter a block of text into an existing configuration file for OpenLDAP so the setup can be fully scripted.

The text below is what I want to enter into slapd.conf and this all works well and good, however as you probably know this will place the text at the end of the file. What I'd like to know is how can I choose where in an existing file I want to place the text or is this beyond the scope of HERE documents?

Code:
cat >> slapd.conf << "EOF"
access to attrs=userPassword
        by self write
        by anonymous auth
        by dn.base="cn=root,dc=abclott,dc=lott" write
        by group.base="cn=infrastructure,ou=GTECH,ou=groups,dc=abclott,dc=lott" write
        by dn.base="uid=ldapmgr,ou=people,dc=abclott,dc=lott" write
        by * none

access to dn.children="ou=people,dc=abclott,dc=lott"
        by dn.base="cn=root,dc=abclott,dc=lott" write
        by dn.base="cn=bind,dc=abclott,dc=lott" read
        by users read
        by * none

access to dn.children="ou=groups,dc=abclott,dc=lott"
        by dn.base="cn=root,dc=abclott,dc=lott" write
        by dn.base="cn=bind,dc=abclott,dc=lott" read
        by users read
        by * none

access to dn.children="ou=servers,dc=abclott,dc=lott"
        by dn.base="cn=root,dc=abclott,dc=lott" write
        by group.base="cn=infrastructure,ou=GTECH,ou=groups,dc=abclott,dc=lott" write
        by dn.base="cn=bind,dc=abclott,dc=lott" read
        by users read
        by * none

access to dn.subtree="ou=SUDOers,dc=abclott,dc=lott"
        by dn.base="cn=root,dc=abclott,dc=lott" write
        by dn.base="cn=bind,dc=abclott,dc=lott" read
        by users read
        by * none

access to *
        by dn.base="cn=root,dc=abclott,dc=lott" write
        by dn.base="cn=bind,dc=abclott,dc=lott" search
        by * none
EOF

# 2  
Old 03-01-2012
Hi, where you place the contents of the here document isn't determined by the here document itself, but by cat >> slapd.conf
# 3  
Old 03-01-2012
Quote:
Originally Posted by Scrutinizer
Hi, where you place the contents of the here document isn't determined by the here document itself, but by cat >> slapd.conf

So if I want to place the text in the designated place below how would I accomplish this? Just to be clear I don't want to write the entire file I just want to take a block of text and insert it into an existing file. I know this can be accomplished with something like sed but I was hoping for a much simpler or elegant way to accomplish this.

# rootdn can always read and write EVERYTHING!

>>ENTER TEXT HERE
################################################## #####################
# ldbm and/or bdb database definitions
################################################## #####################
# 4  
Old 03-01-2012
But inserting into an existing text file involves reading and writing the entire file until the point of insertion, making the insertion and reading and writing the file until the next point of insertion and so on until the end.
# 5  
Old 03-01-2012
Quote:
Originally Posted by Scrutinizer
But inserting into an existing text file involves reading and writing the entire file until the point of insertion, making the insertion and reading and writing the file until the next point of insertion and so on until the end.
I agree with all your points so are you saying this is beyond the scope of HERE documents?..Do you have another suggestion besides SED?
# 6  
Old 03-01-2012
I am saying here documents are not involved in modifying files, in your example above the command "cat" was doing that. Besides sed there is awk or perl what ever tool/language you would like to use to modify the file.

You can also use script:
Code:
while IFS= read -r line
do
  # if some test examining "$line" to determine point of reached
  #   printf "%s\n" "$text" 
  # fi  
  printf "%s\n" "$line"
done < infile > outfile

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