Support : Guides

PERL Quick Reference

You will find links to PERL resources in the GUIDES: Resource Links page.

-X	FILEHANDLE
-X
	-r File is readable by effective uid/gid.
	-w File is writable by effective uid/gid.
	-x File is executable by effective uid/gid.
	-o File is owned by effective uid.
	-R File is readable by real uid/gid.
	-W File is writable by real uid/gid.
	-X File is executable by real uid/gid.
	-O File is owned by real uid.
	-e File exists.
	-z File has zero size.
	-s File has non-zero size (returns size).
	-f File is a plain file.
	-d File is a directory.
	-l File is a symbolic link.
	-p File is a named pipe (FIFO).
	-S File is a socket.
	-b File is a block special file.
	-c File is a character special file.
	-t Filehandle is opened to a tty.
	-u File has setuid bit set.
	-g File has setgid bit set.
	-k File has sticky bit set.
	-T File is a text file.
	-B File is a binary file (opposite of -T).
	-M Age of file in days when script started.
	-A Same for access time.
	-C Same for inode change time.
-XEXPR
abs	VALUE
accept	NEWSOCKET,GENERICSOCKET
alarm	SECONDS
atan2	Y,X
bind	SOCKET,NAME
binmode	FILEHANDLE
bless	REF,PACKAGE
	REF
caller	EXPR
chdir	EXPR
chmod	LIST
chomp	VARIABLE
	LIST
chop	VARIABLE
	LIST
chown	LIST (NUMERICAL uid and gid
chr	NUMBER
chroot	FILENAME
close	FILEHANDLE
closedir	DIRHANDLE
connect	SOCKET,NAME
cos	EXPR
crypt	PLAINTEXT,SALT
dbmclose	ASSOC_ARRAY
dbmopen	ASSOC,DBNAME,MODE
defined	EXPR
delete	EXPR
die	LIST
do	BLOCK
	SUBROUTINE(LIST)
	EXPR
dump	LABEL
each	ASSOC_ARRAY
eof	FILEHANDLE
eval	EXPR
	BLOCK
exec	LIST
exists	EXPR
exit	EXPR
exp	EXPR
fcntl	FILEHANDLE,FUNCTION,SCALAR
fileno	FILEHANDLE
flock	FILEHANDLE,OPERATION
fork
formline	PICTURE, LIST
getc	FILEHANDLE
getc
getlogin
getpeername	SOCKET
getpgrp	PID
getppid
getpriority	WHICH,WHO
getpwnam	NAME
getgrnam	NAME
gethostbyname	NAME
getnetbyname	NAME
getprotobyname	NAME
getpwuid	UID
getgrgid	GID
getservbyname	NAME,PROTO
gethostbyaddr	ADDR,ADDRTYPE
getnetbyaddr	ADDR,ADDRTYPE
getprotobynumber	NUMBER
getservbyport	PORT,PROTO
getpwent
getgrent
gethostent
getnetent
getprotoent
getservent
setpwent
setgrent
sethostent	STAYOPEN
setnetent	STAYOPEN
setprotoent	STAYOPEN
setservent	STAYOPEN
endpwent
endgrent
endhostent
endnetent
endprotoent
endservent
getsockname	SOCKET
getsockopt	SOCKET,LEVEL,OPTNAME
glob	EXPR
gmtime	EXPR
goto	LABEL
	&NAME
grep	BLOCK LIST
	EXPR,LIST
hex	EXPR
import
index	STR,SUBSTR,POSITION
	STR,SUBSTR
int	EXPR
ioctl	FILEHANDLE,FUNCTION,SCALAR
join	EXPR,LIST
keys	ASSOC_ARRAY
kill	LIST
last	LABEL
lc	EXPR
lcfirst	EXPR
length	EXPR
link	OLDFILE,NEWFILE
listen	SOCKET,QUEUESIZE
local	EXPR
localtime	EXPR
log	EXPR
lstat	FILEHANDLE
	EXPR
m//
map	BLOCK LIST
	EXPR,LIST
mkdir	FILENAME,MODE
msgctl	ID,CMD,ARG
msgget	KEY,FLAGS
msgsnd	ID,MSG,FLAGS
msgrcv	ID,VAR,SIZE,TYPE,FLAGS
my	EXPR
next	LABEL
next
no	Module LIST
oct	EXPR
open	FILEHANDLE,EXPR
	FILEHANDLE
opendir	DIRHANDLE,EXPR
ord	EXPR
pack	TEMPLATE,LIST
pipe	READHANDLE,WRITEHANDLE
pop	ARRAY
pos	SCALAR
print	FILEHANDLE LIST
	LIST
printf	FILEHANDLE LIST
	LIST
push	ARRAY,LIST
q/STRING/
qq/STRING/
qx/STRING/
qw/STRING/
quotemeta	EXPR
rand	EXPR
read	FILEHANDLE,SCALAR,LENGTH,OFFSET
	FILEHANDLE,SCALAR,LENGTH
readdir	DIRHANDLE
readlink	EXPR
recv	SOCKET,SCALAR,LEN,FLAGS
redo	LABEL
ref	EXPR
rename	OLDNAME,NEWNAME
require	EXPR
require
reset	EXPR
return	LIST
reverse	LIST
rewinddir	DIRHANDLE
rindex	STR,SUBSTR,POSITION
	STR,SUBSTR
rmdir	FILENAME
s///
scalar	EXPR
seek	FILEHANDLE,POSITION,WHENCE
seekdir	DIRHANDLE,POS
select	FILEHANDLE
	RBITS,WBITS,EBITS,TIMEOUT
semctl	ID,SEMNUM,CMD,ARG
semget	KEY,NSEMS,FLAGS
semop	KEY,OPSTRING
send	SOCKET,MSG,FLAGS,TO
	SOCKET,MSG,FLAGS
setpgrp	PID,PGRP
setpriority	WHICH,WHO,PRIORITY
setsockopt	SOCKET,LEVEL,OPTNAME,OPTVAL
shift	ARRAY
shift
shmctl	ID,CMD,ARG
shmget	KEY,SIZE,FLAGS
shmread	ID,VAR,POS,SIZE
shmwrite	ID,STRING,POS,SIZE
shutdown	SOCKET,HOW
sin	EXPR
sleep	EXPR
sleep
socket	SOCKET,DOMAIN,TYPE,PROTOCOL
socketpair	SOCKET1,SOCKET2,DOMAIN,TYPE,PROTOCOL
sort	SUBNAME LIST
	BLOCK LIST
	LIST
splice	ARRAY,OFFSET,LENGTH,LIST
	ARRAY,OFFSET,LENGTH
	ARRAY,OFFSET
split	/PATTERN/,EXPR,LIMIT
	/PATTERN/,EXPR
	/PATTERN/
sprintf	FORMAT,LIST
sqrt	EXPR
srand	EXPR
stat	FILEHANDLE
	EXPR
study	SCALAR
substr	EXPR,OFFSET,LEN
	EXPR,OFFSET
symlink	OLDFILE,NEWFILE
syscall	LIST
sysread	FILEHANDLE,SCALAR,LENGTH,OFFSET
	FILEHANDLE,SCALAR,LENGTH
system	LIST
syswrite	FILEHANDLE,SCALAR,LENGTH,OFFSET
	FILEHANDLE,SCALAR,LENGTH
tell	FILEHANDLE
telldir	DIRHANDLE
tie	VARIABLE,PACKAGENAME,LIST
time
times
tr///
truncate	FILEHANDLE,LENGTH
	EXPR,LENGTH
uc	EXPR
ucfirst	EXPR
umask	EXPR
undef	EXPR
unlink	LIST
unpack	TEMPLATE,EXPR
untie	VARIABLE
unshift	ARRAY,LIST
use	Module LIST
	Module
utime	LIST
values	ASSOC_ARRAY
vec	EXPR,OFFSET,BITS
wait
waitpid	PID,FLAGS
wantarray
warn	LIST
write	FILEHANDLE
	EXPR
y///