Tests whether the file is empty before opening it for writing. : file test « File « Perl

1.	Array
2.	CGI
3.	Class
4.	Data Type
5.	Database
6.	File
7.	GUI
8.	Hash
9.	Language Basics
10.	Network
11.	Regular Expression
12.	Report
13.	Statement
14.	String
15.	Subroutine
16.	System Functions
17.	Win32
18.	XML

Java Source Code / Java Documentation

Java Open Source

Jar File Download

Photoshop Tutorials

Flash Tutorials

3ds-Max Tutorials

Illustrator Tutorials

C# / CSharp Tutorial

C# / CSharp Open Source

ASP.NET Tutorial

JavaScript DHTML

JavaScript Tutorial

JavaScript Reference

HTML CSS Reference

Python Tutorial

Python Open Source

SQL Server / T-SQL

SQL Server / T-SQL Tutorial

Oracle PL / SQL

Oracle PL/SQL Tutorial

VB.Net Tutorial

Flash / Flex / ActionScript

VBA / Excel / Access / Word

Microsoft Office PowerPoint 2007 Tutorial

Microsoft Office Excel 2007 Tutorial

Microsoft Office Word 2007 Tutorial

Perl » File » file test

Tests whether the file is empty before opening it for writing.


    

#!/usr/local/bin/perl 



if (-e "outfile") { 

   if (!(-w "outfile")) { 

      die ("Missing write permission for outfile.\n"); 

   } 

   if (!(-z "outfile")) { 

      die ("File outfile is non-empty.\n"); 

   } 

}

Related examples in the same category

1.	'-B filehandle': True if file is binary.
2.	'-S filehandle': True if file is a socket (uppercase S).
3.	'-T filehandle': True if file is an ASCII text file.
4.	'-d filehandle': True if file is a directory.
5.	'-e filehandle': True if file exists.
6.	'-f filehandle': True if file is a normal file.
7.	'-l filehandle': True if file is a symbolic link.
8.	'-p filehandle': True if file is a named pipe (FIFO).
9.	'-s filehandle': Returns size if file exists and has nonzero size.
10.	'-w filehandle': True if filehandle is writable.
11.	'-x filehandle': True if filehandle is executable.
12.	'-z filehandle': True if file exists and its size is 0.
13.	is the file a executable file?
14.	is the file a plain file?
15.	is the file a readable file?
16.	is the file a writable file?
17.	Test for file attributes
18.	Tests for read permission on a file.
19.	File test operators
20.	File testing script
21.	File-Test Operator Syntax
22.	File-test operators that check information returned by stat.
23.	File-test operators that test for permissions.
24.	File Tests
25.	File Tests for Age
26.	File Tests for Execution
27.	File Tests for Existence and Size
28.	File Tests for Privileges
29.	File Tests for Type
30.	File Tests for Unix File Handle Types
31.	File Test Operators[a]
32.	Contents of the current directory
33.	Get file modified/accessed time
34.	Get the size of a file
35.	Some -X File Tests
36.	does file exist?

www.java2java.com | Contact Us

Copyright 2009 - 12 Demo Source and Support. All rights reserved.

All other trademarks are property of their respective owners.