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Top Forums Shell Programming and Scripting replace nulls with whitespaces in a file Post 302333745 by meeragiri on Tuesday 14th of July 2009 03:05:03 AM
Old 07-14-2009
replace nulls with whitespaces in a file

Hi,

i have a file which contains data in fixed length. each row contains data of 10 characters fixed length. The data in the file appears like 4567782882

some times i may recieve dat less than fixed length of 10. in such a case i find nulls appended at the trailing spaces when i do a hexdump. i should replace this nulls with whitespaces. how could this be done?

the possiblities where i may recieve nulls in the data is:
123 678910
12345
1
etc..

in all th above cases the nulls should be replaced by white spaces
 

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mlmmj-recieve(1)					      General Commands Manual						  mlmmj-recieve(1)

NAME
mlmmj-recieve - recieve mails for an mlmmj managed mailinglist SYNOPSIS
mlmmj-recieve -L /path/to/listdir [-h] [-V] [-P] [-F] -h: This help -F: Don't fork in the background (debugging only) -L: Full path to list directory -P: Don't execute mlmmj-process (debugging only) -V: Print version DESCRIPTION
The mlmmj-recieve binary is the one specified in the mailserver configuration file (aliases file), which writes the mail to the <list- dir>/incoming directory and invokes mlmmj-process unless the -P option is specified. On systems using mailservers supporting the /etc/aliases file, a line to activate an mlmmj managed mailinglist would look like this: list: "|/usr/bin/mlmmj-recieve -L /var/spool/mlmmj/list/" It's very important to specify the full path to the binary, or the mailinglist will not function. When the -F option is used, it will not fork in the background. The reason it forks is that if delivery of a mail takes longer time than the mail server will allow a command to be idle before presumed dead, the mail server would kill it. SEE ALSO
mlmmj-process(1) AUTHORS
This manual page was written by the following persons: Soren Boll Overgaard <boll@debian.org> (based on html2man output) Mads Martin Jorgensen <mmj@mmj.dk> mlmmj-recieve September 2004 mlmmj-recieve(1)
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