Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to delete a character at the end of a file.
Top Forums Shell Programming and Scripting How to delete a character at the end of a file. Post 302079203 by jim mcnamara on Friday 7th of July 2006 11:07:20 AM
Old 07-07-2006
Yes. sed, vi, and other UNIX utilities that work on lines in files have a file record length limit. It's usually 2048 bytes per line (or record).

Look into fold to break lines into smaller pieces. Maybe. If you really have 1....5000
then you'll have to use C
Code:
/* cchop.c */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* if line ends in a comma, remove that ending comma */
/* usage  cchop < oldfile > newfile  - ONLY uses stdin stdout*/

int main(void)
{
	char tmp[64000]={0x0};  /*WAAAAY oversize */
	size_t len=0;
	
	while(fgets(tmp,sizeof(tmp),stdin)!=NULL)
	{
		char *p=strchr(tmp,0);
		p--;
		while(*p=='\n' || *p==',') 
		{
			*p=0x0;
			p--;
		}
		fprintf(stdout,"%s\n",tmp);
	}
	return 0;
}

Compile that and try it.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Deleting end of line $ character in file

Hi, I've got a file where in the middle of the record is a $ end of line character, visible only when I open the file in vi and do :set list. How to I get rid of the character in the middle and keep it at the end. The middle $ character always appears after SW, so that can be used to tag it.... (3 Replies)
Discussion started by: bwrynz1
3 Replies

2. UNIX for Dummies Questions & Answers

How can I insert character to end of file?

Hello all How can I insert character to the end of text file without opening it in vi Just simple one liner, can it be done? Tnx (1 Reply)
Discussion started by: umen
1 Replies

3. 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

4. Shell Programming and Scripting

append a character at end of each line of a file

Hi, i want to append a character '|' at end of each line of a file abc.txt. for example if the file abc.txt conatins: a|b|c 1|2|33 w|2|11 i want result file xyz.txt a|b|c| 1|2|33| w|2|11| I know this is simple but sumhow i am not able to reach end of line. its urgent, thanks for... (4 Replies)
Discussion started by: muaz
4 Replies

5. 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

6. 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

7. Shell Programming and Scripting

How to remove new line character at end of file.

I need to remove new line character from end of file. Suppose here are content. a|b|c|d|r a|b|c|d|r a|b|c|d|r <new line> that means file contains 4 lines but data is there in 3 lines. so I want that only 3 lines should be there in file. Please help (20 Replies)
Discussion started by: varun940
20 Replies

8. Shell Programming and Scripting

How to add newline character at end of file?

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... (4 Replies)
Discussion started by: jnrohit2k
4 Replies

9. 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

10. Shell Programming and Scripting

Count specific character of a file in each line and delete this character in a specific position

I will appreciate if you help me here in this script in Solaris Enviroment. Scenario: i have 2 files : 1) /tmp/TRANSACTIONS_DAILY_20180730.txt: 201807300000000004 201807300000000005 201807300000000006 201807300000000007 201807300000000008 2)... (10 Replies)
Discussion started by: teokon90
10 Replies

LEARN ABOUT DEBIAN

cdbmake

cdbmake(1)						      General Commands Manual							cdbmake(1)

NAME

       cdbmake - create a constant database

SYNOPSIS

       cdbmake cdb cdb.tmp

DESCRIPTION

       cdbmake reads a series of encoded records from its standard input and writes a constant database to cdb.

       cdbmake	ensures  that  cdb is updated atomically, so programs reading cdb never have to wait for cdbmake to finish.  It does this by first
       writing the database to cdb.tmp and then moving cdb.tmp on top of cdb.  If cdb.tmp already exists, it is destroyed.  The  directories  con-
       taining cdb.tmp and cdb must be writable to cdbmake; they must also be on the same filesystem.

       cdbmake always makes sure that cdb.tmp is safely written to disk before it replaces cdb.  If the input is in a bad format or if cdbmake has
       any trouble writing cdb.tmp to disk, cdbmake complains and leaves cdb alone.

   RECORD FORMAT
       Records are indexed by keys.  A key is a string.  cdb is structured so that another program, starting from a key, can quickly find the rel-
       evant  record.	cdbmake allows several records with the same key, although most readers take only the first record, and cdbmake slows down
       somewhat if there are many records with the same key.

       cdbmake and cdbdump(1) preserve the order of records.

       A record is encoded for cdbmake as +klen,dlen:key->data followed by a newline.  Here klen is the number of bytes in key	and  dlen  is  the
       number of bytes in data.  The end of data is indicated by an extra newline.  For example:

	 +3,5:one->Hello
	 +3,7:two->Goodbye

       key and data may contain any characters, including colons, dashes, newlines, and nulls.

       Keys and data do not have to fit into memory.  A database cannot exceed 4 gigabytes.

       cdb is portable across machines.

SEE ALSO

       cdbdump(1), cdbget(1), cdbstats(1)

																	cdbmake(1)
All times are GMT -4. The time now is 05:25 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy