Name | Desc |
abs | absolute value function |
accept | accept an incoming socket connect |
alarm | schedule a SIGALRM |
atan2 | arctangent of Y/X in the range -PI to PI |
bind | binds an address to a socket |
binmode | prepare binary files for I/O |
bless | create an object |
caller | get context of the current subroutine call |
close | close file (or pipe or socket) handle |
closedir | close directory handle |
connect | connect to a remote socket |
continue | optional trailing block in a while or foreach |
cos | cosine function |
crypt | one-way passwd-style encryption |
dbmclose | breaks binding on a tied dbm file |
dbmopen | create binding on a tied dbm file |
defined | test whether a value, variable, or function is defined or not |
| s a value from a hash |
die | raise an exception or bail out |
do | turn a BLOCK into a TERM |
dump | create an immediate core dump |
each | retrieve the next key/value pair from a hash |
endgrent | be done using group file |
endhostent | be done using hosts file |
endnetent | be done using networks file |
endprotoent | be done using protocols file |
endpwent | be done using passwd file |
endservent | be done using services file |
eof | test a filehandle for its end |
eval | catch exceptions or compile and run code |
exec | abandon this program to run another |
exists | test whether a hash key is present |
exit | terminate this program |
exp | raise I to a power |
fcntl | file control system call |
fileno | return file descriptor from filehandle |
flock | lock an entire file with an advisory lock |
fork | create a new process just like this one |
format | declare a picture format with use by the write() function |
formline | internal function used for formats |
getc | get |
getgrent | get next group record |
getgrgid | get group record given group user ID |
getgrnam | get group record given group name |
gethostbyaddr | get host record given its address |
gethostbyname | get host record given name |
gethostent | get next hosts record |
getlogin | return who logged in at this next character from the filehandle |
getnetbyaddr | get network record given its address |
getnetbyname | get networks record given name |
getnetent | get next networks record |
getpeername | find the other end of a socket connection |
getpgrp | get process group |
getppid | get parent process ID |
getpriority | get current nice value |
getprotobyname | get protocol record given name |
getprotobynumber | get protocol record numeric protocol |
getprotoent | get next protocols record |
getpwent | get next passwd record |
getpwnam | get passwd record given user login name |
getpwuid | get passwd record given user ID |
getservbyname | get services record given its name |
getservbyport | get services record given numeric port |
getservent | get next services record |
getsockname | retrieve the sockaddr for a given socket |
getsockopt | get socket options on a given socket |
glob | expand filenames using wildcards |
gmtime | convert UNIX time into record or string using Greenwich time format. |
goto | create spaghetti code |
grep | locate elements in a list test true against a given criterion |
hex | convert a string to a hexadecimal number |
chdir | change your current working directory |
chmod | changes the permissions on a list of files |
chomp | remove a trailing record separator from a string |
chop | remove the last character from a string |
chown | change the owership on a list of files |
chr | get character this number represents |
chroot | make directory new root for path lookups |
import | patch a module's namespace into your own |
index | find a substring within a string |
int | get the integer portion of a number |
ioctl | system-dependent device control system call |
join | join a list into a string using a separator |
keys | retrieve list of indices from a hash |
kill | send a signal to a process or process group |
last | exit a block prematurely |
lc | return lower-case version of a string |
lcfirst | return a string with just the next letter in lower case |
length | return the number of bytes in a string |
link | create a hard link in the filesytem |
listen | register your socket as a server |
local | create a temporary value for a global variable (dynamic scoping) |
localtime | convert UNIX time into record or string using local time |
lock | get a thread lock on a variable, subroutine, or method |
log | retrieve the natural logarithm for a number |
lstat | stat a symbolic link |
m | match a string with a regular expression pattern |
map | apply a change to a list to get back a new list with the changes |
mkdir | create a directory |
msgctl | SysV IPC message control operations |
msgget | get SysV IPC message queue |
msgrcv | receive a SysV IPC message from a message queue |
msgsnd | send a SysV IPC message to a message queue |
my | declare and assign a local variable (lexical scoping) |
next | iterate a block prematurely |
no | unimport some module symbols or semantics at compile time |
oct | convert a string to an octal number |
open | open a file, pipe, or descriptor |
opendir | open a directory |
ord | find a character's numeric representation |
our | declare and assign a package variable (lexical scoping) |
pack | convert a list into a binary representation |
package | declare a separate global namespace |
pipe | open a pair of connected filehandles |
pop | remove the last element from an array and return it |
pos | find or set the offset for the last/next m//g search |
print | output a list to a filehandle |
printf | output a formatted list to a filehandle |
prototype | get the prototype (if any) of a subroutine |
push | append one or more elements to an array |
q | singly quote a string |
qq | doubly quote a string |
qr | Compile pattern |
quotemeta | quote regular expression magic characters |
qw | quote a list of words |
qx | backquote quote a string |
rand | retrieve the next pseudorandom number |
read | fixed-length buffered input from a filehandle |
readdir | get a directory from a directory handle |
readline | fetch a record from a file |
readlink | determine where a symbolic link is pointing |
readpipe | execute a system command and collect standard output |
recv | receive a message over a Socket |
redo | start this loop iteration over again |
ref | find out the type of thing being referenced |
rename | change a filename |
require | load in external functions from a library at runtime |
reset | clear all variables of a given name |
return | get out of a function early |
reverse | flip a string or a list |
rewinddir | reset directory handle |
rindex | right-to-left substring search |
rmdir | remove a directory |
s | replace a pattern with a string |
scalar | force a scalar context |
seek | reposition file pointer for random-access I/O |
seekdir | reposition directory pointer |
| reset default output or do I/O multiplexing |
semctl | SysV semaphore control operations |
semget | get set of SysV semaphores |
semop | SysV semaphore operations |
send | send a message over a socket |
setgrent | prepare group file for use |
sethostent | prepare hosts file for use |
setnetent | prepare networks file for use |
setpgrp | set the process group of a process |
setpriority | set a process's nice value |
setprotoent | prepare protocols file for use |
setpwent | prepare passwd file for use |
setservent | prepare services file for use |
setsockopt | set some socket options |
shift | remove the first element of an array, and return it |
shmctl | SysV shared memory operations |
shmget | get SysV shared memory segment identifier |
shmread | read SysV shared memory |
shmwrite | write SysV shared memory |
shutdown | close down just half of a socket connection |
sin | return the sine of a number |
sleep | block for some number of seconds |
socket | create a socket |
socketpair | create a pair of sockets |
sort | sort a list of values |
splice | add or remove elements anywhere in an array |
split | split up a string using a regexp delimiter |
sprintf | formatted print into a string |
sqrt | square root function |
srand | seed the random number generator |
stat | get a file's status information |
study | optimize input data for repeated searches |
sub | declare a subroutine, possibly anonymously |
substr | get or alter a portion of a stirng |
symlink | create a symbolic link to a file |
syscall | execute an arbitrary system call |
sysopen | open a file, pipe, or descriptor |
sysread | fixed-length unbuffered input from a filehandle |
sysseek | position I/O pointer on handle used with sysread and syswrite |
system | run a separate program |
syswrite | fixed-length unbuffered output to a filehandle |
tell | get current seekpointer on a filehandle |
telldir | get current seekpointer on a directory handle |
tie | bind a variable to an object class |
tied | get a reference to the object underlying a tied variable |
time | return number of seconds since 1970 |
times | return elapsed time for self and child processes |
tr | transliterate a string |
truncate | shorten a file |
uc | return upper-case version of a string |
ucfirst | return a string with just the next letter in upper case |
umask | set file creation mode mask |
undef | remove a variable or function definition |
unlink | remove one link to a file |
unpack | convert binary structure into normal perl variables |
unshift | prepend more elements to the beginning of a list |
untie | break a tie binding to a variable |
use | load in a module at compile time |
utime | set a file's last access and modify times |
values | return a list of the values in a hash |
vec | test or set particular bits in a string |
wait | wait for any child process to die |
waitpid | wait for a particular child process to die |
wantarray | get void vs scalar vs list context of current subroutine call |
warn | print debugging info |
write | print a picture record |