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Index: F

failure, returning from subroutines : 10.10. Returning Failure

false strings : 1.0. Introduction

fcntl(�)

7.14. Doing Non-Blocking I/O
10.10. Returning Failure

fdirs program (example) : 9.7. Processing All Files in a Directory Recursively

fdopen(�) (IO::Handle) : 7.19. Opening and Closing File Descriptors by Number

FETCH(�) : 13.15. Creating Magic Variables with tie

fetching URLs from Perl scripts : 20.1. Fetching a URL from a Perl Script

fifolog program (example) : 16.11. Making a Process Look Like a File with Named Pipes

FIFOs (named pipes) : 16.11. Making a Process Look Like a File with Named Pipes

file access

(see also directories; file contents)

7.0. Introduction

9.0. Introduction

access modes : 7.0. Introduction

caching open filehandles : 7.17. Caching Open Output Filehandles

copying filehandles : 7.20. Copying Filehandles

copying or moving files : 9.3. Copying or Moving a File

deleting files : 9.2. Deleting a File

editing files : (see file contents)

filtering filename input : 7.7. Writing a Filter

flushing output : 7.12. Flushing Output

locking files

7.11. Locking a File
7.21. Program: netlock
region-specific locks : 7.22. Program: lockarea

non-blocking I/O : 7.14. Doing Non-Blocking I/O

number of bytes to read : 7.15. Determining the Number of Bytes to Read

opening files : 7.1. Opening a File

opening/closing file descriptors : 7.19. Opening and Closing File Descriptors by Number

printing to multiple filehandles : 7.18. Printing to Many Filehandles Simultaneously

processing all files in directories

9.5. Processing All Files in a Directory
9.7. Processing All Files in a Directory Recursively

reading from multiple filehandles : 7.13. Reading from Many Filehandles Without Blocking

storing files in program text : 7.6. Storing Files Inside Your Program Text

timestamps : 9.1. Getting and Setting Timestamps

file contents

(see also directories; file access)

8.0. Introduction

9.0. Introduction

adding records to wtmp file : 8.18. Program: tailwtmp

configuration files, reading : 8.16. Reading Configuration Files

continually growing files, reading : 8.5. Trailing a Growing File

counting lines/paragraphs/records : 8.2. Counting Lines (or Paragraphs or Records) in a File

extracting single line : 8.8. Reading a Particular Line in a File

fixed-length records

8.0. Introduction
8.15. Reading Fixed-Length Records

modifying

with -i option : 7.9. Modifying a File in Place with -i Switch
with temporary files : 7.8. Modifying a File in Place with Temporary File
without temporary files : 7.10. Modifying a File in Place Without a Temporary File

processing all words in : 8.3. Processing Every Word in a File

processing binary files : 8.11. Processing Binary Files

random access I/O : 8.12. Using Random-Access I/O

random lines from : 8.6. Picking a Random Line from a File

randomizing line order : 8.7. Randomizing All Lines

reading backwards : 8.4. Reading a File Backwards by Line or Paragraph

reading lines with continuation characters : 8.1. Reading Lines with Continuation Characters

reading strings from binary files : 8.14. Reading a String from a Binary File

reading/writing hash records to file : 11.10. Reading and Writing Hash Records to Text Files

tctee program : 8.19. Program: tctee

testing for trustworthiness : 8.17. Testing a File for Trustworthiness

text files as database arrays : 14.7. Treating a Text File as a Database Array

variable-length text fields : 8.9. Processing Variable-Length Text Fields

viewing lastlog file information : 8.20. Program: laston

file descriptors, opening/closing : 7.19. Opening and Closing File Descriptors by Number

file stat cache (_) : 9.0. Introduction

__FILE__ symbol : 10.4. Determining Current Function Name

File::Basename module : 9.10. Splitting a Filename into Its Component Parts

File::Copy module : 9.3. Copying or Moving a File

File::Find module

9.7. Processing All Files in a Directory Recursively
9.8. Removing a Directory and Its Contents

File::KGlob module : 9.6. Globbing, or Getting a List of Filenames Matching a Pattern

File::LockDir module : 7.21. Program: netlock

File::stat module

8.5. Trailing a Growing File
9.0. Introduction

FileCache module : 7.17. Caching Open Output Filehandles

FileHandler module : 7.0. Introduction

filehandles : 7.0. Introduction

caching open filehandles : 7.17. Caching Open Output Filehandles

copying : 7.20. Copying Filehandles

local

7.16. Storing Filehandles in Variables
10.13. Saving Global Values

non-blocking I/O : 7.14. Doing Non-Blocking I/O

passing

7.16. Storing Filehandles in Variables
10.13. Saving Global Values
12.5. Determining the Caller's Package

printing to multiple simultaneously : 7.18. Printing to Many Filehandles Simultaneously

reading from many : 7.13. Reading from Many Filehandles Without Blocking

reporting filenames in errors : 7.4. Making Perl Report Filenames in Errors

storing as variables

7.0. Introduction
7.16. Storing Filehandles in Variables

tied : 13.15. Creating Magic Variables with tie

filenames

expanding tildes in : 7.3. Expanding Tildes in Filenames

filtering as input : 7.7. Writing a Filter

matching with patterns : 9.6. Globbing, or Getting a List of Filenames Matching a Pattern

multiple, for same file : 9.4. Recognizing Two Names for the Same File

parsing : 9.10. Splitting a Filename into Its Component Parts

renaming : 9.9. Renaming Files

reporting in errors : 7.4. Making Perl Report Filenames in Errors

sorting

9.0. Introduction
9.12. Program: lst

strange, opening files with : 7.2. Opening Files with Unusual Filenames

fileparse(�) : 9.10. Splitting a Filename into Its Component Parts

files

deleting last line of : 8.10. Removing the Last Line of a File
temporary : 7.5. Creating Temporary Files

filesystem : (see directories)

filtering filenames as input : 7.7. Writing a Filter

filtering output : 16.5. Filtering Your Own Output

FindBin module : 12.7. Keeping Your Own Module Directory

finddepth(�) : 9.8. Removing a Directory and Its Contents

finding

most common anything : 5.14. Finding the Most Common Anything
patterns : (see pattern matching; regular expressions)

findlogin program (example) : 7.7. Writing a Filter

FIONREAD call : 7.15. Determining the Number of Bytes to Read

firewalls, connecting through : 17.18. Program: fwdport

fisher_yates_shuffle(�) : 4.17. Randomizing an Array

fixed-length records

8.0. Introduction
8.15. Reading Fixed-Length Records

FixNum class : 13.14. Overloading Operators

fixstyle program (example) : 1.17. Program: fixstyle

fixstyle2 program (example) : 1.17. Program: fixstyle

flattened lists : 4.0. Introduction

floating-point numbers : 2.0. Introduction

comparing : 2.2. Comparing Floating-Point Numbers
rounding : 2.3. Rounding Floating-Point Numbers

flock(�)

7.11. Locking a File
7.21. Program: netlock

floor(�) : 2.3. Rounding Floating-Point Numbers

flushing output : 7.12. Flushing Output

fmt program : 1.12. Reformatting Paragraphs

folded_demo program (example) : 13.15. Creating Magic Variables with tie

foodfind program : 5.8. Inverting a Hash

=for escape pod directive : 12.16. Documenting Your Module with Pod

foreach(�) : 4.12. Finding the First List Element That Passes a Test

fork(�)

(see also processes)
16.0. Introduction
16.10. Communicating Between Related Processes
19.6. Executing Commands Without Shell Escapes
avoiding zombies : 16.19. Avoiding Zombie Processes
closing socket after : 17.9. Closing a Socket After Forking
forking servers : 17.11. Forking Servers
non-forking servers : 17.13. Non-Forking Servers
pre-forking servers : 17.12. Pre-Forking Servers

forms (HTML) : 19.0. Introduction

saving or emailing : 19.13. Saving a Form to a File or Mail Pipe
sticky widgets : 19.11. Creating Sticky Widgets
submitting : 20.2. Automating Form Submission

Frame widget (Tk) : 15.14. Creating Menus with Tk

fresh hyperlinks, finding : 20.8. Finding Fresh Links

Friedl, Jeffrey : 6.10. Speeding Up Interpolated Matches

FTP clients : 18.2. Being an FTP Client

full-screen mode : 15.0. Introduction

functions : (see subroutines)

interpolating within strings : 1.10. Interpolating Functions and Expressions Within Strings
methods vs. : 13.9. Writing an Inheritable Class
references to : 11.4. Taking References to Functions

fuzzy matching : 6.13. Approximate Matching

fwdport program (example) : 17.18. Program: fwdport

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