Replacing contents in a file from multiple programmes


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
# 1  
Error Replacing contents in a file from multiple programmes

Hi All,
I have a query on Perl. I have a text file which has 3 lines, i want to only replace the first line with my replaced text and keep the rest of the text. FOr eg

Before change -->
echo:aSmilieending
echoSmiliepending
echo:cSmilieending

After change --->
echo:a:done
echoSmiliepending
echo:cSmilieending

Brief: Here i am continuously trying to modify the text file though this perl programme from multiple machines i.e this perl prog will run on multiple machines trying to modify\change a single text.

Snippet of my code.(not working yet. It appends to the text file instead of replacing it). Can you please guide me to this.
============================================
open(MYFILE, "+< $myfile") || die;
flock(MYFILE, 2);

#my $myfile="c:\\ssk\\help.txt";
#open INPUT, "<$myfile";
undef $/;
my $content = <MYFILE>;
my $inprogress = "inprogress";
my $done = "done";
$content =~ m/(\w*)Smilie\w*)Smilie\w*)/;

if ($3 eq "pending")
{

$content=~ s/pending/inprogress/;
my $contentbkup = $content;
$content =~ s/(.*)//g;
print MYFILE "$1";
print MYFILE "$contentbkup";
$contentbkup =~ s/(.*)Smilie.*)Smilie.*)/(.*)Smilie.*):$done/;
}

seek(MYFILE, 0, 0);
close MYFILE;
$/ = "\n";
# 2  
Hi All,
I have a query on Perl. I have a text file which has 3 lines, i want to only replace the first line with my replaced text and keep the rest of the text. FOr eg

Before change -->
echo:aending
echopending
echo:cending

After change --->
echo:a:done
echopending
echo:cending

Brief: Here i am continuously trying to modify the text file though this perl programme from multiple machines i.e this perl prog will run on multiple machines trying to modify\change a single text.

Snippet of my code.(not working yet. It appends to the text file instead of replacing it). Can you please guide me to this.
============================================
open(MYFILE, "+< $myfile") || die;
flock(MYFILE, 2);

#my $myfile="c:\\ssk\\help.txt";
#open INPUT, "<$myfile";
undef $/;
my $content = <MYFILE>;
my $inprogress = "inprogress";
my $done = "done";
$content =~ m/(\w*)\w*)\w*)/;

if ($3 eq "pending")
{

$content=~ s/pending/inprogress/;
my $contentbkup = $content;
$content =~ s/(.*)//g;
print MYFILE "$1";
print MYFILE "$contentbkup";
$contentbkup =~ s/(.*).*).*)/(.*).*):$done/;
}

seek(MYFILE, 0, 0);
close MYFILE;
$/ = "\n";
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #947
Difficulty: Medium
Malware a portmanteau for malicious hardware.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Output file name and file contents of multiple files to a single file

I am trying to consolidate multiple information files (<hostname>.Linux.nfslist) into one file so that I can import it into Excel. I can get the file contents with cat *Linux.nfslist >> nfslist.txt. I need each line prefaced with the hostname. I am unsure how to do this. --- Post updated at... (5 Replies)
Discussion started by: Kentlee65
5 Replies

2. Shell Programming and Scripting

Replacing multiple spaces in flat file

Greetings all I have a delimited text file (the delimiter is ';') where certain fields consist of many blanks e.g. ; ; and ; ; Before I separate the data I need to eliminate these blanks altogether. I tried the sed command using the following syntax: sed -i 's/; *;/;;/g' <filename> ... (15 Replies)
Discussion started by: S. BASU
15 Replies

3. Shell Programming and Scripting

Replacing a single line with multiple lines in a file

Hi Am confused with the usage of "sed" command I want to replace a single line with multiple lines of a file.. eg., A file has Hi, How are you? I need to replace as Am fine What are You doing? I used the script as string1="Hi, How are you?" echo "$string1 is the value"... (4 Replies)
Discussion started by: Priya Amaresh
4 Replies

4. UNIX for Dummies Questions & Answers

Replacing a particular string in all files in folder and file contents

I need to replace all filesnames in a folder as well as its content from AK6 to AK11. Eg Folder has files AK6-Create.xml, AK6-system.py etc.. the files names as well as contents should be changes to AK9-Create.xml, AK9-system.py etc All files are xml and python scripts. ---------- Post... (0 Replies)
Discussion started by: Candid247
0 Replies

5. Shell Programming and Scripting

replace a string with contents of a txt file containing multiple lines of strings

Hello everyone, ive been trying to replace a string "kw01" in an xml file with the contents of a txt file having multiple lines. im a unix newbie and all the sed combinations i tried resulted to being garbled. Below is the contents of the txt file: RAISEDATTIME --------------------... (13 Replies)
Discussion started by: 4dirk1
13 Replies

6. Shell Programming and Scripting

sed command for copying the contents of other file replacing it another file on specifc pattern

We have 2 file XML files - FILE1.XML and FILE2.xml - we need copy the contents of FILE1.XML and replace in FILE2.xml pattern "<assignedAttributeList></assignedAttributeList>" FILE1.XML 1. <itemList> 2. <item type="Manufactured"> 3. <resourceCode>431048</resourceCode> 4. ... (0 Replies)
Discussion started by: balrajg
0 Replies

7. Ubuntu

Cannot see 'tick boxes' and other contents when installed programmes using Wine. Is there any other

Hi! I have installed ubuntu out of an error, a bit of frustration, a bit of annoyance and a bit of excitement! I am (was!) a windows user. I had windows 7 on my laptop. You might already know how famous windows is with nasty viruses. I got one too! Had no option but to get rid of the whole... (3 Replies)
Discussion started by: ubuntu_noob
3 Replies

8. Shell Programming and Scripting

Replacing string in all instances (both filenames and file contents) in a directory

Hi, I have a set of files stored in a single directory that I use to set parameters for a physics code, and I would like to streamline the process of updating them all when I change a parameter. For instance, if the files are called A2000p300ini, A2000p300sub, A2000p300run, and the text in each... (3 Replies)
Discussion started by: BlueChris
3 Replies

9. Shell Programming and Scripting

replacing text with contents from another file

I'm trying to change the ramfs size in kernel .config automatically. I have a ramfs_size file generated with du -s cat ramfs_size 64512 I want to replace the linux .config's ramdisk size with the above value CONFIG_BLK_DEV_RAM_SIZE=73728 Right now I'm doing something dumb like: ... (3 Replies)
Discussion started by: amoeba
3 Replies

10. Shell Programming and Scripting

put the contents of this file into a variable with multiple lines

I have a file that contains the following lines the brown quick fox jumped over the white laze dog 0123456789 I wanted to put the contents of this file into a variable so I used this code: VAR_LIST=`cat $2` where $2 is the file name passed as an argument to the script If I... (3 Replies)
Discussion started by: Nomaad
3 Replies

Featured Tech Videos