07-03-2002
String substitutions in ASCII files -
We need to scramble data in a number of ASCII files. Some of these files are extremely large (1.2 GB). By scrambling, I mean that we need to substitute certain strings, which number around 400, with scrambled strings. An example has been given below
If "London" occurs in the file, then it needs to be substituted by "X1"
If "Frankfurt" occurs in the file, then it needs to be substituted by "X2".
We have written a Korn shell script, but there are huge performance problems as we need to check for 400 different strings. What is the best way of doing this ?.
The machine is HP-UX B.11.00 E 9000/800.
The solution suggested by Perderabo works...................
...............like LIGHTNING.
Thanks a lot for the help.
Last edited by SanjivNagraj; 07-04-2002 at 07:52 AM..
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LEARN ABOUT DEBIAN
ascii-xfr
ASCII-XFR(1) Linux Users Manual ASCII-XFR(1)
NAME
ascii-xfr - upload/download files using the ASCII protocol
SYNOPSIS
ascii-xfr -s|-r [-ednv] [-l linedelay] [-c characterdelay] filename
DESCRIPTION
Ascii-xfr Transfers files in ASCII mode. This means no flow control, no checksumming and no file-name negotiation. It should only be used
if the remote system doesn't understand anything else.
The ASCII protocol transfers files line-by-line. The EOL (End-Of-Line) character is transmitted as CRLF. When receiving, the CR character
is stripped from the incoming file. The Control-Z (ASCII 26) character signals End-Of-File, if option -e is specified (unless you change
it to Control-D (ASCII 4) with -d).
Ascii-xfr reads from stdin when receiving, and sends data on stdout when sending. Some form of input or output redirection to the modem
device is thus needed when downloading or uploading, respectively.
OPTIONS
-s Send a file.
-r Receive a file. One of -s or -r must be present.
-e Send the End-Of-File character (Control-Z, ASCII 26 by default) when uploading has finished.
-d Use the Control-D (ASCII 4) as End-Of-File character.
-n Do not translate CR to CRLF and vice versa.
-v Verbose: show transfer statistics on the stderr output.
-l milliseconds
When transmitting, pause for this delay after each line.
-c milliseconds
When transmitting, pause for this delay after each character.
file Name of the file to send or receive. When receiving, any existing file by this name will be truncated.
USAGE WITH MINICOM
If you want to call this program from minicom(1), start minicom and go to the Options menu. Select File transfer protocols. Add the fol-
lowing lines, for example as protocols I and J.
I Ascii /usr/bin/ascii-xfr -sv Y U N Y
J Ascii /usr/bin/ascii-xfr -rv Y D N Y
AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl
Jukka Lahtinen, walker@netsonic.fi
SEE ALSO
minicom(1)
$Date: 2006-10-28 14:35:59 $ ASCII-XFR(1)