Problem with Shell Scripts deleting text in files.
Me and a friend are working on a project, and We have to create a script that can go into a file, and replace all occurances of a certain expression/word/letter with another using Sed. It is designed to go through multiple tests replacing all these occurances, and we don't know what they will be so we have to anticipate anything. We are having trouble on a certain test where we need to replace 'l*' with 'L' in different files using a loop. The code that i have is
Code:
#!/bin/sh
p1="$1" #first parameter
shift
p2="$1"
shift
for file in "$@" #for any file in the directory
do
# A="$1"
#echo $A
#B="$2"
echo "$p1" | sed -e 's/\([*.[^$]\)/\\\1/g' > temporary #treat all special characters as plain text
A="`cat 'temporary'`"
rm temporary
echo "$p1"
echo "$file"
sed "s/$p1/$p2/g" "$file" > myFile.txt.updated #replace occurances
mv myFile.txt.updated "$file"
cat "$file"
done
I have tried testing this on practice files that contain different words and also 'l*' But whenever i test it, it deletes all the text in the file. Can someone help me with this,
Moderator's Comments:
edit by bakunin: For a number of reasons it is imperative for students posting here to use the template provided. This is not the case here.
I am going to close this thread, please create another thread and fill out the template correctly, i will merge it into this thread here and reopen it.
Last edited by bakunin; 08-15-2012 at 03:26 AM..
Reason: Code tags, please...
Hi everyone,
If someone out there could help me out with this problem. I would really appreciate it.
I am trying to convert a file into xml format using Unix shell scripts.
The file has fields with each field having a certain number of bytes, but the fields are not delimited by anything... (10 Replies)
Hi Gurus!
I wonder if anyone can help me, I'm sure you guys can.
I have a text file which contains a lot of data on the one line as follows:
$
What I need to do is pull all of those id values out (eg 2549425) and write them to a list in a text file.
Any help would be greatly... (3 Replies)
I have a directory full of text data files.
Unfortunately I need to get rid of the 7th and 8th line from them all so that I can input them into a GIS application.
I've used an awk script to do one at a time but due to the sheer number of files I need some kind of loop mechanism to automate... (3 Replies)
Hi all,
I have a directory containing many subdirectories each named like KOG#### where # represents any digit 0-9. There are several files in each KOG#### folder but the one I care about is named like KOG####_final.fasta. I am trying to write a script to copy all of the KOG####_final.fasta... (3 Replies)
Hi Guys,
In one of my folders i have 10000 log files starting with sqlfile.....
Iam trying to delete the log files alone from the folder using for loop but i am getting an error
ksh: /usr/bin/ls: 0403-027 The parameter list is too long.
For loop i used
for i in `ls sqlfile*`... (4 Replies)
I am currently trying out MKS Toolkit C Shell, and I've no problems with it until I try add directories to PATH that are located on a network drive.
When I do that, the shell performance slows down significantly and no longer runs fast. In fact, it takes seconds for something that should take... (1 Reply)
I'm baffled..... the system I work on creates files every Mon-Friday
I'm trying to delete all files older than 30 days old from a Unix prompt, the command I'm using is:
find /directory/ -mtime +30 -exec rm {} \;
however it returns /directory/filename: 644 mode ? (y/n) for every file! ... (1 Reply)
Hi,
does anyone have some of those scripts or maybe have idea how to make them?
------------------------------------
1)
block of text multiplication n times:
e.g.
something1 something2 something3
something4 something5 something6
result:
something1 something2 something3
something4... (2 Replies)
I have 4 files in a directory and want to delete only first 2 files only..
$ ls -ltr
total 640
-rw-r--r-- 1 user other 148779 Oct 12 10:50 file1.xls
-rw-r--r-- 1 user other 148779 Oct 12 10:50 file2.xls
-rw-r--r-- 1 user other 148779 Oct 12 10:50 file3.xls... (4 Replies)
Discussion started by: giridhar276
4 Replies
LEARN ABOUT SUSE
ausearch_add_expression
AUSEARCH_ADD_expression(3) Linux Audit API AUSEARCH_ADD_expression(3)NAME
ausearch_add_expression - build up search expression
SYNOPSIS
#include <auparse.h>
int ausearch_add_expression(auparse_state_t *au, const char *expression, char **error, ausearch_rule_t how);
DESCRIPTION
ausearch_add_item adds an expression to the current audit search expression. The search conditions can then be used to scan logs, files,
or buffers for something of interest. The expression parameter contains an expression, as specified in ausearch-expression(5).
The how parameter determines how this search expression will affect the existing search expression, if one is already defined. The possi-
ble values are:
AUSEARCH_RULE_CLEAR
Clear the current search expression, if any, and use only this search expression.
AUSEARCH_RULE_OR
If a search expression E is already configured, replace it by (E || this_search_expression).
AUSEARCH_RULE_AND
If a search expression E is already configured, replace it by (E && this_search_expression).
RETURN VALUE
If successful, ausearch_add_expression returns 0. Otherwise, it returns -1, sets errno and it may set *error to an error message; the
caller must free the error message using free(3). If an error message is not available or can not be allocated, *error is set to NULL.
SEE ALSO ausearch_add_item(3), ausearch_add_interpreted_item(3), ausearch_add_timestamp_item(3), ausearch_add_regex(3), ausearch_set_stop(3), ause-
arch_clear(3), ausearch_next_event(3), ausearch-expression(5).
AUTHOR
Miloslav Trmac
Red Hat Feb 2008 AUSEARCH_ADD_expression(3)
08-14-2012
