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package Pod::Functions;
use strict;
=head1 NAME
Pod::Functions - Group Perl's functions a la perlfunc.pod
use Pod::Functions;
my @misc_ops = @{ $Kinds{ 'Misc' } };
my $misc_dsc = $Type_Description{ 'Misc' };
perl /path/to/lib/Pod/
This will print a grouped list of Perl's functions, like the
L<perlfunc/"Perl Functions by Category"> section.
It exports the following variables:
=over 4
=item %Kinds
This holds a hash-of-lists. Each list contains the functions in the category
the key denotes.
=item %Type
In this hash each key represents a function and the value is the category.
The category can be a comma separated list.
=item %Flavor
In this hash each key represents a function and the value is a short
description of that function.
=item %Type_Description
In this hash each key represents a category of functions and the value is
a short description of that category.
=item @Type_Order
This list of categories is used to produce the same order as the
L<perlfunc/"Perl Functions by Category"> section.
=head1 CHANGES
1.02 20020813 <>
de-typo in the SYNOPSIS section (thanks Mike Castle for noticing)
1.01 20011229 <>
fixed some bugs that slipped in after 5.6.1
added the pod
finished making it strict safe
1.00 ??
first numbered version
our $VERSION = '1.04';
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(%Kinds %Type %Flavor %Type_Description @Type_Order);
our(%Kinds, %Type, %Flavor);
our %Type_Description = (
'ARRAY' => 'Functions for real @ARRAYs',
'Binary' => 'Functions for fixed length data or records',
'File' => 'Functions for filehandles, files, or directories',
'Flow' => 'Keywords related to control flow of your perl program',
'HASH' => 'Functions for real %HASHes',
'I/O' => 'Input and output functions',
'LIST' => 'Functions for list data',
'Math' => 'Numeric functions',
'Misc' => 'Miscellaneous functions',
'Modules' => 'Keywords related to perl modules',
'Network' => 'Fetching network info',
'Objects' => 'Keywords related to classes and object-orientedness',
'Process' => 'Functions for processes and process groups',
'Regexp' => 'Regular expressions and pattern matching',
'Socket' => 'Low-level socket functions',
'String' => 'Functions for SCALARs or strings',
'SysV' => 'System V interprocess communication functions',
'Time' => 'Time-related functions',
'User' => 'Fetching user and group info',
'Namespace' => 'Keywords altering or affecting scoping of identifiers',
our @Type_Order = qw{
while (<DATA>) {
next unless $_;
my($name, $type, $text) = split " ", $_, 3;
$Type{$name} = $type;
$Flavor{$name} = $text;
for my $t ( split /[,\s]+/, $type ) {
push @{$Kinds{$t}}, $name;
close DATA;
my( $typedesc, $list );
unless (caller) {
foreach my $type ( @Type_Order ) {
$list = join(", ", sort @{$Kinds{$type}});
$typedesc = $Type_Description{$type} . ":";
format =
~~ ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
~~ ^<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
-X File a file test (-r, -x, etc)
abs Math absolute value function
accept Socket accept an incoming socket connect
alarm Process schedule a SIGALRM
atan2 Math arctangent of Y/X in the range -PI to PI
bind Socket binds an address to a socket
binmode I/O prepare binary files for I/O
bless Objects create an object
caller Flow,Namespace get context of the current subroutine call
chdir File change your current working directory
chmod File changes the permissions on a list of files
chomp String remove a trailing record separator from a string
chop String remove the last character from a string
chown File change the ownership on a list of files
chr String get character this number represents
chroot File make directory new root for path lookups
close I/O close file (or pipe or socket) handle
closedir I/O close directory handle
connect Socket connect to a remote socket
continue Flow optional trailing block in a while or foreach
cos Math cosine function
crypt String one-way passwd-style encryption
dbmclose Objects,I/O breaks binding on a tied dbm file
dbmopen Objects,I/O create binding on a tied dbm file
defined Misc test whether a value, variable, or function is defined
delete HASH deletes a value from a hash
die I/O,Flow raise an exception or bail out
do Flow,Modules turn a BLOCK into a TERM
dump Misc,Flow create an immediate core dump
each HASH retrieve the next key/value pair from a hash
endgrent User be done using group file
endhostent User be done using hosts file
endnetent User be done using networks file
endprotoent Network be done using protocols file
endpwent User be done using passwd file
endservent Network be done using services file
eof I/O test a filehandle for its end
eval Flow,Misc catch exceptions or compile and run code
exec Process abandon this program to run another
exists HASH test whether a hash key is present
exit Flow terminate this program
exp Math raise I<e> to a power
fcntl File file control system call
fileno I/O return file descriptor from filehandle
flock I/O lock an entire file with an advisory lock
fork Process create a new process just like this one
format I/O declare a picture format with use by the write() function
formline Misc internal function used for formats
getc I/O get the next character from the filehandle
getgrent User get next group record
getgrgid User get group record given group user ID
getgrnam User get group record given group name
gethostbyaddr Network get host record given its address
gethostbyname Network get host record given name
gethostent Network get next hosts record
getlogin User return who logged in at this tty
getnetbyaddr Network get network record given its address
getnetbyname Network get networks record given name
getnetent Network get next networks record
getpeername Socket find the other end of a socket connection
getpgrp Process get process group
getppid Process get parent process ID
getpriority Process get current nice value
getprotobyname Network get protocol record given name
getprotobynumber Network get protocol record numeric protocol
getprotoent Network get next protocols record
getpwent User get next passwd record
getpwnam User get passwd record given user login name
getpwuid User get passwd record given user ID
getservbyname Network get services record given its name
getservbyport Network get services record given numeric port
getservent Network get next services record
getsockname Socket retrieve the sockaddr for a given socket
getsockopt Socket get socket options on a given socket
glob File expand filenames using wildcards
gmtime Time convert UNIX time into record or string using Greenwich time
goto Flow create spaghetti code
grep LIST locate elements in a list test true against a given criterion
hex Math,String convert a string to a hexadecimal number
import Modules,Namespace patch a module's namespace into your own
index String find a substring within a string
int Math get the integer portion of a number
ioctl File system-dependent device control system call
join LIST join a list into a string using a separator
keys HASH retrieve list of indices from a hash
kill Process send a signal to a process or process group
last Flow exit a block prematurely
lc String return lower-case version of a string
lcfirst String return a string with just the next letter in lower case
length String return the number of bytes in a string
link File create a hard link in the filesystem
listen Socket register your socket as a server
local Misc,Namespace create a temporary value for a global variable (dynamic scoping)
localtime Time convert UNIX time into record or string using local time
lock Threads get a thread lock on a variable, subroutine, or method
log Math retrieve the natural logarithm for a number
lstat File stat a symbolic link
m// Regexp match a string with a regular expression pattern
map LIST apply a change to a list to get back a new list with the changes
mkdir File create a directory
msgctl SysV SysV IPC message control operations
msgget SysV get SysV IPC message queue
msgrcv SysV receive a SysV IPC message from a message queue
msgsnd SysV send a SysV IPC message to a message queue
my Misc,Namespace declare and assign a local variable (lexical scoping)
next Flow iterate a block prematurely
no Modules unimport some module symbols or semantics at compile time
package Modules,Objects,Namespace declare a separate global namespace
prototype Flow,Misc get the prototype (if any) of a subroutine
oct String,Math convert a string to an octal number
open File open a file, pipe, or descriptor
opendir File open a directory
ord String find a character's numeric representation
our Misc,Namespace declare and assign a package variable (lexical scoping)
pack Binary,String convert a list into a binary representation
pipe Process open a pair of connected filehandles
pop ARRAY remove the last element from an array and return it
pos Regexp find or set the offset for the last/next m//g search
print I/O output a list to a filehandle
printf I/O output a formatted list to a filehandle
push ARRAY append one or more elements to an array
q/STRING/ String singly quote a string
qq/STRING/ String doubly quote a string
quotemeta Regexp quote regular expression magic characters
qw/STRING/ LIST quote a list of words
qx/STRING/ Process backquote quote a string
qr/STRING/ Regexp Compile pattern
rand Math retrieve the next pseudorandom number
read I/O,Binary fixed-length buffered input from a filehandle
readdir I/O get a directory from a directory handle
readline I/O fetch a record from a file
readlink File determine where a symbolic link is pointing
readpipe Process execute a system command and collect standard output
recv Socket receive a message over a Socket
redo Flow start this loop iteration over again
ref Objects find out the type of thing being referenced
rename File change a filename
require Modules load in external functions from a library at runtime
reset Misc clear all variables of a given name
return Flow get out of a function early
reverse String,LIST flip a string or a list
rewinddir I/O reset directory handle
rindex String right-to-left substring search
rmdir File remove a directory
s/// Regexp replace a pattern with a string
scalar Misc force a scalar context
seek I/O reposition file pointer for random-access I/O
seekdir I/O reposition directory pointer
select I/O reset default output or do I/O multiplexing
semctl SysV SysV semaphore control operations
semget SysV get set of SysV semaphores
semop SysV SysV semaphore operations
send Socket send a message over a socket
setgrent User prepare group file for use
sethostent Network prepare hosts file for use
setnetent Network prepare networks file for use
setpgrp Process set the process group of a process
setpriority Process set a process's nice value
setprotoent Network prepare protocols file for use
setpwent User prepare passwd file for use
setservent Network prepare services file for use
setsockopt Socket set some socket options
shift ARRAY remove the first element of an array, and return it
shmctl SysV SysV shared memory operations
shmget SysV get SysV shared memory segment identifier
shmread SysV read SysV shared memory
shmwrite SysV write SysV shared memory
shutdown Socket close down just half of a socket connection
sin Math return the sine of a number
sleep Process block for some number of seconds
socket Socket create a socket
socketpair Socket create a pair of sockets
sort LIST sort a list of values
splice ARRAY add or remove elements anywhere in an array
split Regexp split up a string using a regexp delimiter
sprintf String formatted print into a string
sqrt Math square root function
srand Math seed the random number generator
stat File get a file's status information
study Regexp optimize input data for repeated searches
sub Flow declare a subroutine, possibly anonymously
substr String get or alter a portion of a string
symlink File create a symbolic link to a file
syscall I/O,Binary execute an arbitrary system call
sysopen File open a file, pipe, or descriptor
sysread I/O,Binary fixed-length unbuffered input from a filehandle
sysseek I/O,Binary position I/O pointer on handle used with sysread and syswrite
system Process run a separate program
syswrite I/O,Binary fixed-length unbuffered output to a filehandle
tell I/O get current seekpointer on a filehandle
telldir I/O get current seekpointer on a directory handle
tie Objects bind a variable to an object class
tied Objects get a reference to the object underlying a tied variable
time Time return number of seconds since 1970
times Process,Time return elapsed time for self and child processes
tr/// String transliterate a string
truncate I/O shorten a file
uc String return upper-case version of a string
ucfirst String return a string with just the next letter in upper case
umask File set file creation mode mask
undef Misc remove a variable or function definition
unlink File remove one link to a file
unpack Binary,LIST convert binary structure into normal perl variables
unshift ARRAY prepend more elements to the beginning of a list
untie Objects break a tie binding to a variable
use Modules,Namespace load a module and import its namespace
use Objects load in a module at compile time
utime File set a file's last access and modify times
values HASH return a list of the values in a hash
vec Binary test or set particular bits in a string
wait Process wait for any child process to die
waitpid Process wait for a particular child process to die
wantarray Misc,Flow get void vs scalar vs list context of current subroutine call
warn I/O print debugging info
write I/O print a picture record
y/// String transliterate a string
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