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Top Forums UNIX for Beginners Questions & Answers Remove footer record in specific condition Post 303009217 by KK230689 on Monday 11th of December 2017 04:35:52 AM
Old 12-11-2017
Quote:
Originally Posted by Don Cragun
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If values other than JE are at the start of records that need to be removed, how are those records identified?

Do you always want to remove every line that starts with a J?

Do you always want to remove every line that starts with an uppercase alphabetic character?

Do you always want to remove every line that starts with a character that is not a numeric character?

Do you always want to remove the last line in every file you process?

Do you always want to remove every line that contains exactly two commas?

What operating system are you using?

What shell are you using?

What have you tried to solve this problem on your own?
we are using the following version of os version

Code:
Linux uklvaucup01a 2.6.32-696.3.2.el6.x86_64 #1 SMP Wed Jun 7 11:51:39 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux

Your question :
Do you always want to remove every line that contains exactly two commas?

Yes , but need not look all line for 2 commas, usual it will be found at the footer record. these record will not be available start and middle. so our approach is to look tail of the file and matches the pattern as less than 2 or 3 commas .

thanks for your quick response

Last edited by rbatte1; 12-11-2017 at 11:27 AM.. Reason: Added CODE tags and fixed some spelling issues
 

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REMOVE(3)						     Linux Programmer's Manual							 REMOVE(3)

NAME
remove - remove a file or directory SYNOPSIS
#include <stdio.h> int remove(const char *pathname); DESCRIPTION
remove() deletes a name from the filesystem. It calls unlink(2) for files, and rmdir(2) for directories. If the removed name was the last link to a file and no processes have the file open, the file is deleted and the space it was using is made available for reuse. If the name was the last link to a file, but any processes still have the file open, the file will remain in existence until the last file descriptor referring to it is closed. If the name referred to a symbolic link, the link is removed. If the name referred to a socket, FIFO, or device, the name is removed, but processes which have the object open may continue to use it. RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
The errors that occur are those for unlink(2) and rmdir(2). ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |remove() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99, 4.3BSD. BUGS
Infelicities in the protocol underlying NFS can cause the unexpected disappearance of files which are still being used. SEE ALSO
rm(1), unlink(1), link(2), mknod(2), open(2), rename(2), rmdir(2), unlink(2), mkfifo(3), symlink(7) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 REMOVE(3)
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