Sponsored Content
Top Forums Shell Programming and Scripting How to add newline character at end of file? Post 302826895 by jnrohit2k on Thursday 27th of June 2013 02:16:49 PM
Old 06-27-2013
How to add newline character at end of file?

Code:
 
Hi All,
 
I have following piece of code in UNIX C Shell script and I want to add one more command which can add newline at the end of file only if there is no newline character exists.
 
   foreach file (`ls $dd_PLAYCARD_EDI_IN`)
    if ( -f $dd_PLAYCARD_EDI_IN/${file} ) then
      cat -n "$dd_PLAYCARD_EDI_IN/${file}"    | \
      perl -p -e "s/\x0d\x0a/\x0a/"  | \
      sed -e 's/00000000$/22991231/' | \
      sort -k1.18,1.29               >   $DATADIR/playcard/$file

Above "for loop" retrive the file from a directory then "cat" on each file to add line number, "perl" to remove ^M (control M) characters from the end of each line, "sed" will replace last 8 zeros with 22991231 and finally sort will sort the file. After "perl" command I want to add command which can add newline character at the end of file if it do not exists.
 
Please suggest.
 
Thanks!

 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to add new line character at the end of a file

hi all, i have this question: How to add new line character at the end of a file???? i need this because i am loading a file to sybase and i have problems with the last record thanks for your help (5 Replies)
Discussion started by: DebianJ
5 Replies

2. Shell Programming and Scripting

Append newline at the file end

Hi All, Is there any way to append a newline character at the end of a file(coma-separated file), through shell script? I need to check whether newline character exists at the end of a file, if it does not then append it. Regards, Krishna (1 Reply)
Discussion started by: KrishnaSaran
1 Replies

3. Shell Programming and Scripting

How to remove a newline character at the end of filename

Hi All, I have named a file with current date,time and year as follows: month=`date | awk '{print $2}'` date=`date | awk '{print $3}'` year=`date | awk '{print $6}'` time=`date +%Hh_%Mm_%Ss'` filename="test_"$month"_"$date"_"$year"_"$time".txt" > $filename The file is created with a... (2 Replies)
Discussion started by: amio
2 Replies

4. Shell Programming and Scripting

add character to the end of each line in file

hi all i have 32 lines in file. the length of each line is 82 , i want that in the end of each line , means in postion 83-84 to put two characters 0d(=\015), 0a(=\012) i want that the 0d will be in postion 83 and the 0a will be in postion 84 in each line of the file how shall i do it ? ... (7 Replies)
Discussion started by: naamas03
7 Replies

5. Shell Programming and Scripting

add character to every end-of line in file

Hi All I have a file which conatins record.the length of every records is 47. problem : in the end of record i don't have a "\015" character. i want to add this "\015" charcter in the end of every record. the file contains something like 700 records. i've tried with sed command - nothing. ... (8 Replies)
Discussion started by: naamas03
8 Replies

6. UNIX for Dummies Questions & Answers

How to add newline before and after a special character?

So I have a file that contains >NM_#########AUGCAUCGUAGCUAGUCGAUACUGGACUG>NM_########AUGAGUAUGUAUGAUGUAUGUAUGA where # is any digit 0-9 (the text is many repetitions of the pattern above, not just that, but all in one line), and I want it to show >NM_#########... (2 Replies)
Discussion started by: ShiGua
2 Replies

7. Shell Programming and Scripting

Appending newline character End of File

Hi Gurus, Need help. I'm a beginner in Unix. I have a requirement, need to add or append newline (\n) character in file. Sample Data: 1|Main|Test|~# 2|Main|Hello|~# 3|Main|Unix|~# 4|Main|File|~#Output: 1|Main|Test|~# 2|Main|Hello|~# 3|Main|Unix|~# 4|Main|File|~#\n -- append only... (13 Replies)
Discussion started by: Gouri Solleti
13 Replies

8. Shell Programming and Scripting

Warning while sorting : A newline character was added to the end of file

Hi, I am trying to sort a csv file which has say 10 lines each line having a row size that is upto 30183 no. of COLUMNS (Row length = 30183). There is a LINE FEED (LF) at the end of each line. When I try to sort this file say, based on the second FIELD using the below command, sort -t ',' +1... (5 Replies)
Discussion started by: DHeisenberg
5 Replies

9. Shell Programming and Scripting

No newline at end of file

Hello all, I have maybe a simple Problem - but I do not know to handle it. All what I want, is to write a line to file without a newline at the end. It works with "echo -n" for all lines, but not for the last one. At the end of the file is always a "0a" (hex) My small script: ... (10 Replies)
Discussion started by: API
10 Replies

10. Shell Programming and Scripting

How to remove newline character if it is the only character in the entire file.?

I have a file which comes every day and the file data look's as below. Vi abc.txt a|b|c|d\n a|g|h|j\n Some times we receive the file with only a new line character in the file like vi abc.txt \n (8 Replies)
Discussion started by: rak Kundra
8 Replies
SED(1)								   User Commands							    SED(1)

NAME
sed - manual page for sed version 4.0.3 SYNOPSIS
sed [OPTION]... {script-only-if-no-other-script} [input-file]... DESCRIPTION
Sed is a stream editor. A stream editor is used to perform basic text transformations on an input stream (a file or input from a pipe- line). While in some ways similar to an editor which permits scripted edits (such as ed), sed works by making only one pass over the input(s), and is consequently more efficient. But it is sed's ability to filter text in a pipeline which particularly distinguishes it from other types of editors. -n, --quiet, --silent suppress automatic printing of pattern space -e script, --expression=script add the script to the commands to be executed -f script-file, --file=script-file add the contents of script-file to the commands to be executed -i[suffix], --in-place[=suffix] edit files in place (makes backup if extension supplied) -l N, --line-length=N specify the desired line-wrap length for the `l' command -r, --regexp-extended use extended regular expressions in the script. -s, --separate consider files as separate rather than as a single continuous long stream. -u, --unbuffered load minimal amounts of data from the input files and flush the output buffers more often --help display this help and exit -V, --version output version information and exit If no -e, --expression, -f, or --file option is given, then the first non-option argument is taken as the sed script to interpret. All remaining arguments are names of input files; if no input files are specified, then the standard input is read. E-mail bug reports to: bonzini@gnu.org . Be sure to include the word ``sed'' somewhere in the ``Subject:'' field. COMMAND SYNOPSIS
This is just a brief synopsis of sed commands to serve as a reminder to those who already know sed; other documentation (such as the tex- info document) must be consulted for fuller descriptions. Zero-address ``commands'' : label Label for b and t commands. #comment The comment extends until the next newline (or the end of a -e script fragment). } The closing bracket of a { } block. Zero- or One- address commands = Print the current line number. a text Append text, which has each embedded newline preceded by a backslash. i text Insert text, which has each embedded newline preceded by a backslash. q Immediately quit the sed script without processing any more input, except that if auto-print is not disabled the current pattern space will be printed. Q Immediately quit the sed script without processing any more input. r filename Append text read from filename. R filename Append a line read from filename. Commands which accept address ranges { Begin a block of commands (end with a }). b label Branch to label; if label is omitted, branch to end of script. t label If a s/// has done a successful substitution since the last input line was read and since the last t or T command, then branch to label; if label is omitted, branch to end of script. T label If no s/// has done a successful substitution since the last input line was read and since the last t or T command, then branch to label; if label is omitted, branch to end of script. c text Replace the selected lines with text, which has each embedded newline preceded by a backslash. d Delete pattern space. Start next cycle. D Delete up to the first embedded newline in the pattern space. Start next cycle, but skip reading from the input if there is still data in the pattern space. h H Copy/append pattern space to hold space. g G Copy/append hold space to pattern space. x Exchange the contents of the hold and pattern spaces. l List out the current line in a ``visually unambiguous'' form. n N Read/append the next line of input into the pattern space. p Print the current pattern space. P Print up to the first embedded newline of the current pattern space. s/regexp/replacement/ Attempt to match regexp against the pattern space. If successful, replace that portion matched with replacement. The replacement may contain the special character & to refer to that portion of the pattern space which matched, and the special escapes 1 through 9 to refer to the corresponding matching sub-expressions in the regexp. w filename Write the current pattern space to filename. W filename Write the first line of the current pattern space to filename. y/source/dest/ Transliterate the characters in the pattern space which appear in source to the corresponding character in dest. Addresses Sed commands can be given with no addresses, in which case the command will be executed for all input lines; with one address, in which case the command will only be executed for input lines which match that address; or with two addresses, in which case the command will be executed for all input lines which match the inclusive range of lines starting from the first address and continuing to the second address. Three things to note about address ranges: the syntax is addr1,addr2 (i.e., the addresses are separated by a comma); the line which addr1 matched will always be accepted, even if addr2 selects an earlier line; and if addr2 is a regexp, it will not be tested against the line that addr1 matched. After the address (or address-range), and before the command, a ! may be inserted, which specifies that the command shall only be executed if the address (or address-range) does not match. The following address types are supported: number Match only the specified line number. first~step Match every step'th line starting with line first. For example, ``sed -n 1~2p'' will print all the odd-numbered lines in the input stream, and the address 2~5 will match every fifth line, starting with the second. (This is an extension.) $ Match the last line. /regexp/ Match lines matching the regular expression regexp. cregexpc Match lines matching the regular expression regexp. The c may be any character. GNU sed also supports some special 2-address forms: 0,addr2 Start out in "matched first address" state, until addr2 is found. This is similar to 1,addr2, except that if addr2 matches the very first line of input the 0,addr2 form will be at the end of its range, whereas the 1,addr2 form will still be at the beginning of its range. addr1,+N Will match addr1 and the N lines following addr1. addr1,~N Will match addr1 and the lines following addr1 until the next line whose input line number is a multiple of N. REGULAR EXPRESSIONS
POSIX.2 BREs should be supported, but they aren't completely because of performance problems. The sequence in a regular expression matches the newline character, and similarly for a, , and other sequences. BUGS
E-mail bug reports to bonzini@gnu.org. Be sure to include the word ``sed'' somewhere in the ``Subject:'' field. Also, please include the output of ``sed --version'' in the body of your report if at all possible. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE, to the extent permitted by law. SEE ALSO
awk(1), ed(1), grep(1), tr(1), perlre(1), sed.info, any of various books on sed, the sed FAQ (http://sed.sf.net/grabbag/tutorials/sed- faq.html), http://sed.sf.net/grabbag/. The full documentation for sed is maintained as a Texinfo manual. If the info and sed programs are properly installed at your site, the command info sed should give you access to the complete manual. sed version 4.0.3 November 2002 SED(1)
All times are GMT -4. The time now is 03:04 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy