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Full Discussion: Rename file in directory using contents within each file
Top Forums UNIX for Beginners Questions & Answers Rename file in directory using contents within each file Post 303042502 by Scrutinizer on Friday 27th of December 2019 07:44:32 AM
Old 12-27-2019
Hi Ravinder,

As long as a mv operation is performed on the same file system - as is the case here - that should not pose a problem, since mv then only manipulates directory data: A file name is nothing more than a directory entry, a pointer (a hard link) to the file itself.

When a process opens a file for reading, the operation system creates an entry (file descriptor) to represent that file and stores information about that opened file in memory. So then the directory entry is no longer used.

The mv operation is thus free to manipulate the directory entry.

So for the process that has opened and is reading the file, nothing changes as the directory data is being changed.
When it is done reading it just closes the file descriptor.

Also, the file list expanded by the glob is expanded before being passed to the awk script, so new file names are not passed to the script.

S.
These 2 Users Gave Thanks to Scrutinizer For This Post:
cmccabe RavinderSingh13
 

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LEARN ABOUT SUNOS

evolution-addressbook-import

evolution-addressbook-import(1) 				   User Commands				   evolution-addressbook-import(1)

NAME

       evolution-addressbook-import - import contact information into the local address book in Ximian Evolution, Sun Microsystems Edition

SYNOPSIS

       evolution-addressbook-import [--help] [--input=input-file] [--usage] [--version]

DESCRIPTION

       Import contact information into the local address book from a file.

       The file contents can be in either virtual-card (Vcard) format or comma-separated value (CSV) format.

OPTIONS

       The following options are supported:

       --help		       Display help text. You can also use -? to specify this option.

       --input=input-file      Specify the input file that contains the information to be imported.

       --usage		       Display brief usage text.

       --version	       Display version information.

EXAMPLES

       Example 1: Importing Contact Information into Local Address Book From contacts.vcf

       example% evolution-addressbook-import --input=contacts.vcf

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       1	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/evolution-addressbook-import

	   Executable to import data into Evolution local address book

       $HOME/evolution

	   Per-user configuration files and local storage for Evolution

       $HOME/evolution/mail/account/folders

	   Temporary files for Evolution mail

       $HOME/evolution/sunone/account/folders

	   Temporary files for Evolution Sun ONE account

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |SPARC			   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWevo			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT safe with Exceptions	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Ximian Evolution Sun Microsystems Edition User Guide

       evolution(1), evolution-address-export(1)

NOTES

       Written by Steven Zhang, Sun Microsystems Inc., 2004.

SunOS 5.10							    15 Apr 2004 				   evolution-addressbook-import(1)
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