a2p
accept
access
acct
addftinfo
addr2line
adjtime
afmtodit
after
aio_cancel
aio_error
aio_read
aio_return
aio_suspend
aio_waitcomplete
aio_write
alias
aliases
alloc
anvil
append
apply
apropos
ar
array
as
asa
asn1parse
at
atq
atrm
attemptckalloc
attemptckrealloc
authlib
authtest
autopoint
awk
b64decode
b64encode
basename
batch
bc
bdes
bell
bg
bgerror
biff
big5
binary
bind
bindkey
bindtags
bindtextdomain
bio
bitmap
blowfish
bn
bootparams
bootptab
bounce
brandelf
break
breaksw
brk
bsdiff
bsdtar
bsnmpd
bspatch
bthost
btsockstat
buffer
builtin
builtins
bunzip2
button
byacc
bzcat
bzegrep
bzfgrep
bzgrep
bzip2
c2ph
c89
c99
ca
cal
calendar
canvas
cap_mkdb
case
cat
catch
catman
cc
cd
cdcontrol
chdir
checkbutton
checknr
chflags
chfn
chgrp
chio
chkey
chmod
chown
chpass
chroot
chsh
ci
ciphers
ckalloc
ckdist
ckfree
ckrealloc
cksum
cleanup
clear
clipboard
clock
clock_getres
clock_gettime
clock_settime
close
cmp
co
col
colcrt
colldef
colors
colrm
column
comm
command
compile_et
complete
compress
concat
config
connect
console
continue
core
courierlogger
couriertcpd
cp
cpan
cpio
cpp
creat
crl
crontab
crunchgen
crunchide
crypt
crypto
csh
csplit
ctags
ctm
ctm_dequeue
ctm_rmail
ctm_smail
cu
cursor
cursors
cut
cvs
date
dbiprof
dbiproxy
dc
dcgettext
dcngettext
dd
dde
default
defer
deliverquota
des
destroy
devfs
df
dgettext
dgst
dh
dhparam
dialog
diff
diff3
dig
dir
dirent
dirname
dirs
discard
disktab
dngettext
do
domainname
done
dprofpp
dsa
dsaparam
dtmfdecode
du
dup
dup2
eaccess
ec
ecdsa
echo
echotc
ecparam
ed
edit
editrc
ee
egrep
elf
elfdump
elif
else
enc
enc2xs
encoding
end
endif
endsw
engine
enigma
entry
env
envsubst
eof
eqn
err
errno
error
errstr
esac
ethers
euc
eui64
eval
event
evp
ex
exec
execve
exit
expand
export
exports
expr
extattr
extattr_delete_fd
extattr_delete_file
extattr_get_fd
extattr_get_file
extattr_set_fd
extattr_set_file
f77
false
famm
famx
fblocked
fbtab
fc
fchdir
fchflags
fchmod
fchown
fcntl
fconfigure
fcopy
fdescfs
fdformat
fdread
fdwrite
fetch
fg
fgrep
fhopen
fhstat
fhstatfs
fi
file
file2c
fileevent
filename
filetest
find
find2perl
finger
flex
flock
flush
fmt
focus
fold
font
fontedit
for
foreach
fork
format
forward
fpathconf
frame
from
fs
fstab
fstat
fstatfs
fsync
ftp
ftpchroot
ftpusers
ftruncate
futimes
g711conv
gb2312
gb18030
gbk
gcc
gcore
gcov
gdb
gencat
gendsa
genrsa
gensnmptree
getconf
getdents
getdirentries
getdtablesize
getegid
geteuid
getfacl
getfh
getfsstat
getgid
getgroups
getitimer
getlogin
getopt
getopts
getpeername
getpgid
getpgrp
getpid
getppid
getpriority
getresgid
getresuid
getrlimit
getrusage
gets
getsid
getsockname
getsockopt
gettext
gettextize
gettimeofday
gettytab
getuid
glob
global
gmake
goto
gperf
gprof
grab
grep
grid
grn
grodvi
groff
groff_font
groff_out
groff_tmac
grog
grolbp
grolj4
grops
grotty
group
groups
gunzip
gzcat
gzexe
gzip
h2ph
h2xs
hash
hashstat
hd
head
help2man
hesinfo
hexdump
history
host
hostname
hosts
hosts_access
hosts_options
hpftodit
http
hup
i386_get_ioperm
i386_get_ldt
i386_set_ioperm
i386_set_ldt
i386_vm86
iconv
id
ident
idprio
if
ifnames253
ifnames259
image
imapd
incr
indent
indxbib
info
infokey
inode
install
instmodsh
interp
intro
introduction
ioctl
ipcrm
ipcs
ipf
ipftest
ipnat
ippool
ipresend
issetugid
jail
jail_attach
jobid
jobs
join
jot
kbdcontrol
kbdmap
kcon
kdestroy
kdump
kenv
kevent
keycap
keylogin
keylogout
keymap
keysyms
kgdb
kill
killall
killpg
kinit
kldfind
kldfirstmod
kldload
kldnext
kldstat
kldsym
kldunload
klist
kpasswd
kqueue
kse
kse_create
kse_exit
kse_release
kse_switchin
kse_thr_interrupt
kse_wakeup
ktrace
label
labelframe
lam
lappend
last
lastcomm
lastlog
lchflags
lchmod
lchown
ld
ldap
ldapadd
ldapcompare
ldapdelete
ldapmodify
ldapmodrdn
ldappasswd
ldapsearch
ldapwhoami
ldd
leave
less
lesskey
lex
lgetfh
lhash
libnetcfg
library
limit
limits
lindex
link
linprocfs
linsert
lint
lio_listio
list
listbox
listen
lj4_font
lkbib
llength
lmtp
ln
load
loadfont
local
locale
locate
lock
lockf
log
logger
login
logins
logname
logout
look
lookbib
lorder
lower
lp
lpq
lpr
lprm
lptest
lrange
lreplace
ls
lsearch
lseek
lset
lsort
lstat
lsvfs
lutimes
lynx
m4
madvise
magic
mail
maildiracl
maildirkw
maildirmake
mailq
mailx
make
makeinfo
makewhatis
man
manpath
master
mc
mcedit
mcview
md2
md4
md5
mdc2
memory
menu
menubar
menubutton
merge
mesg
message
mincore
minherit
minigzip
mkdep
mkdir
mkfifo
mkimapdcert
mklocale
mknod
mkpop3dcert
mkstr
mktemp
mlock
mlockall
mmap
mmroff
modfind
modfnext
modnext
modstat
moduli
more
motd
mount
mprotect
mptable
msdos
msdosfs
msgattrib
msgcat
msgcmp
msgcomm
msgconv
msgen
msgexec
msgfilter
msgfmt
msggrep
msginit
msgmerge
msgs
msgunfmt
msguniq
mskanji
msql2mysql
msync
mt
munlock
munlockall
munmap
mv
myisamchk
myisamlog
myisampack
mysql
mysqlaccess
mysqladmin
mysqlbinlog
mysqlcheck
mysqld
mysqldump
mysqld_multi
mysqld_safe
mysqlhotcopy
mysqlimport
mysqlshow
mysql_config
mysql_fix_privilege_tables
mysql_zap
namespace
nanosleep
nawk
nc
ncal
ncplist
ncplogin
ncplogout
neqn
netconfig
netgroup
netid
netstat
networks
newaliases
newgrp
nex
nfsstat
nfssvc
ngettext
nice
nl
nm
nmount
nohup
nologin
notify
nroff
nseq
nslookup
ntp_adjtime
ntp_gettime
nvi
nview
objcopy
objdump
objformat
ocsp
od
onintr
open
openssl
opieaccess
opieinfo
opiekey
opiekeys
opiepasswd
option
options
oqmgr
pack
package
packagens
pagesize
palette
pam_auth
panedwindow
parray
passwd
paste
patch
pathchk
pathconf
pawd
pax
pbm
pcre
pcreapi
pcrebuild
pcrecallout
pcrecompat
pcrecpp
pcregrep
pcrematching
pcrepartial
pcrepattern
pcreperform
pcreposix
pcreprecompile
pcresample
pcretest
perl
perl56delta
perl58delta
perl561delta
perl570delta
perl571delta
perl572delta
perl573delta
perl581delta
perl582delta
perl583delta
perl584delta
perl585delta
perl586delta
perl587delta
perl588delta
perl5004delta
perl5005delta
perlaix
perlamiga
perlapi
perlapio
perlapollo
perlartistic
perlbeos
perlbook
perlboot
perlbot
perlbs2000
perlbug
perlcall
perlcc
perlce
perlcheat
perlclib
perlcn
perlcompile
perlcygwin
perldata
perldbmfilter
perldebguts
perldebtut
perldebug
perldelta
perldgux
perldiag
perldoc
perldos
perldsc
perlebcdic
perlembed
perlepoc
perlfaq
perlfaq1
perlfaq2
perlfaq3
perlfaq4
perlfaq5
perlfaq6
perlfaq7
perlfaq8
perlfaq9
perlfilter
perlfork
perlform
perlfreebsd
perlfunc
perlglossary
perlgpl
perlguts
perlhack
perlhist
perlhpux
perlhurd
perlintern
perlintro
perliol
perlipc
perlirix
perlivp
perljp
perlko
perllexwarn
perllinux
perllocale
perllol
perlmachten
perlmacos
perlmacosx
perlmint
perlmod
perlmodinstall
perlmodlib
perlmodstyle
perlmpeix
perlnetware
perlnewmod
perlnumber
perlobj
perlop
perlopenbsd
perlopentut
perlos2
perlos390
perlos400
perlothrtut
perlpacktut
perlplan9
perlpod
perlpodspec
perlport
perlqnx
perlre
perlref
perlreftut
perlrequick
perlreref
perlretut
perlrun
perlsec
perlsolaris
perlstyle
perlsub
perlsyn
perlthrtut
perltie
perltoc
perltodo
perltooc
perltoot
perltrap
perltru64
perltw
perlunicode
perluniintro
perlutil
perluts
perlvar
perlvmesa
perlvms
perlvos
perlwin32
perlxs
perlxstut
perror
pfbtops
pftp
pgrep
phones
photo
pic
pickup
piconv
pid
pipe
pkcs7
pkcs8
pkcs12
pkg_add
pkg_check
pkg_create
pkg_delete
pkg_info
pkg_sign
pkg_version
pkill
pl2pm
place
pod2html
pod2latex
pod2man
pod2text
pod2usage
podchecker
podselect
poll
popd
popup
posix_madvise
postalias
postcat
postconf
postdrop
postfix
postkick
postlock
postlog
postmap
postqueue
postsuper
pr
pread
preadv
printcap
printenv
printf
proc
procfs
profil
protocols
prove
proxymap
ps
psed
psroff
pstruct
ptrace
publickey
pushd
puts
pwd
pwrite
pwritev
qmgr
qmqpd
quota
quotactl
radiobutton
raise
rand
ranlib
rcp
rcs
rcsclean
rcsdiff
rcsfile
rcsfreeze
rcsintro
rcsmerge
read
readelf
readlink
readonly
readv
realpath
reboot
recv
recvfrom
recvmsg
red
ree
refer
regexp
registry
regsub
rehash
remote
rename
repeat
replace
req
reset
resolver
resource
return
rev
revoke
rfcomm_sppd
rfork
rhosts
ripemd
ripemd160
rlog
rlogin
rm
rmd160
rmdir
rpc
rpcgen
rs
rsa
rsautl
rsh
rtld
rtprio
rup
ruptime
rusers
rwall
rwho
s2p
safe
sasl
sasldblistusers2
saslpasswd2
sbrk
scache
scale
scan
sched
sched_getparam
sched_getscheduler
sched_get_priority_max
sched_get_priority_min
sched_rr_get_interval
sched_setparam
sched_setscheduler
sched_yield
scon
scp
script
scrollbar
sdiff
sed
seek
select
selection
semctl
semget
semop
send
sendbug
sendfile
sendmail
sendmsg
sendto
services
sess_id
set
setegid
setenv
seteuid
setfacl
setgid
setgroups
setitimer
setlogin
setpgid
setpgrp
setpriority
setregid
setresgid
setresuid
setreuid
setrlimit
setsid
setsockopt
settc
settimeofday
setty
setuid
setvar
sftp
sh
sha
sha1
sha256
shar
shells
shift
shmat
shmctl
shmdt
shmget
showq
shutdown
sigaction
sigaltstack
sigblock
sigmask
sigpause
sigpending
sigprocmask
sigreturn
sigsetmask
sigstack
sigsuspend
sigvec
sigwait
size
slapadd
slapcat
slapd
slapdn
slapindex
slappasswd
slaptest
sleep
slogin
slurpd
smbutil
smime
smtp
smtpd
socket
socketpair
sockstat
soelim
sort
source
spawn
speed
spinbox
spkac
splain
split
squid
squid_ldap_auth
squid_ldap_group
squid_unix_group
sscop
ssh
sshd_config
ssh_config
stab
startslip
stat
statfs
stop
string
strings
strip
stty
su
subst
sum
suspend
swapoff
swapon
switch
symlink
sync
sysarch
syscall
sysconftool
sysconftoolcheck
systat
s_client
s_server
s_time
tabs
tail
talk
tar
tbl
tclsh
tcltest
tclvars
tcopy
tcpdump
tcpslice
tcsh
tee
tell
telltc
telnet
term
termcap
terminfo
test
texindex
texinfo
text
textdomain
tfmtodit
tftp
then
threads
time
tip
tk
tkerror
tkvars
tkwait
tlsmgr
tmac
top
toplevel
touch
tput
tr
trace
trafshow
trap
troff
true
truncate
truss
tset
tsort
tty
ttys
type
tzfile
ui
ul
ulimit
umask
unalias
uname
uncomplete
uncompress
undelete
unexpand
unhash
unifdef
unifdefall
uniq
units
unknown
unlimit
unlink
unmount
unset
unsetenv
until
unvis
update
uplevel
uptime
upvar
usbhidaction
usbhidctl
users
utf8
utimes
utmp
utrace
uudecode
uuencode
uuidgen
vacation
variable
verify
version
vfork
vgrind
vgrindefs
vi
vidcontrol
vidfont
view
virtual
vis
vt220keys
vwait
w
wait
wait3
wait4
waitpid
wall
wc
wget
what
whatis
where
whereis
which
while
who
whoami
whois
window
winfo
wish
wm
write
writev
wtmp
x509
xargs
xgettext
xmlwf
xstr
xsubpp
yacc
yes
ypcat
ypchfn
ypchpass
ypchsh
ypmatch
yppasswd
ypwhich
yyfix
zcat
zcmp
zdiff
zegrep
zfgrep
zforce
zgrep
zmore
znew
_exit
__syscall
 
FreeBSD/Linux/UNIX General Commands Manual
Hypertext Man Pages
fconfigure
 
fconfigure(n)		     Tcl Built-In Commands		 fconfigure(n)



NAME
       fconfigure - Set and get options on a channel

SYNOPSIS
       fconfigure channelId
       fconfigure channelId name
       fconfigure channelId name value ?name value ...?

DESCRIPTION
       The fconfigure command sets and retrieves options for channels.

       ChannelId  identifies  the  channel for which to set or query an option
       and must refer to an open  channel  such  as  a	Tcl  standard  channel
       (stdin, stdout, or stderr), the return value from an invocation of open
       or socket, or the result of a channel creation command  provided  by  a
       Tcl extension.

       If  no name or value arguments are supplied, the command returns a list
       containing alternating option names and values  for  the  channel.   If
       name  is  supplied  but	no  value then the command returns the current
       value of the given option.  If one or more pairs of name and value  are
       supplied, the command sets each of the named options to the correspond-
       ing value; in this case the return value is an empty string.

       The options described below are supported for all  channels.  In  addi-
       tion,  each channel type may add options that only it supports. See the
       manual entry for the command that creates each type of channels for the
       options	that  that specific type of channel supports. For example, see
       the manual entry for the socket command for its additional options.

       -blocking boolean
	      The -blocking option determines whether I/O  operations  on  the
	      channel  can cause the process to block indefinitely.  The value
	      of the option must be a proper boolean value.  Channels are nor-
	      mally in blocking mode;  if a channel is placed into nonblocking
	      mode it will affect the  operation  of  the  gets,  read,  puts,
	      flush,  and close commands; see the documentation for those com-
	      mands for details.  For nonblocking mode to work correctly,  the
	      application  must  be  using the Tcl event loop (e.g. by calling
	      Tcl_DoOneEvent or invoking the vwait command).

       -buffering newValue
	      If newValue is full then the I/O system will buffer output until
	      its  internal  buffer  is  full  or  until  the flush command is
	      invoked. If newValue is line, then the I/O system will automati-
	      cally  flush output for the channel whenever a newline character
	      is output. If newValue is none, the I/O system will flush  auto-
	      matically  after	every  output  operation.   The default is for
	      -buffering to be set to full except for channels that connect to
	      terminal-like devices; for these channels the initial setting is
	      line.  Additionally, stdin and stdout are initially set to line,
	      and stderr is set to none.

       -buffersize newSize
	      Newvalue	must  be an integer; its value is used to set the size
	      of buffers, in bytes, subsequently allocated for this channel to
	      store input or output. Newvalue must be between ten and one mil-
	      lion, allowing buffers of ten to one million bytes in size.

       -encoding name
	      This option is used to specify the encoding of the  channel,  so
	      that  the  data  can be converted to and from Unicode for use in
	      Tcl.  For instance, in order for Tcl to read characters  from  a
	      Japanese	file  in shiftjis and properly process and display the
	      contents, the encoding would be set  to  shiftjis.   Thereafter,
	      when  reading  from  the channel, the bytes in the Japanese file
	      would be converted to Unicode as they are read.  Writing is also
	      supported  - as Tcl strings are written to the channel they will
	      automatically be converted to the specified encoding on  output.

	      If  a  file  contains  pure  binary  data  (for instance, a JPEG
	      image), the encoding for the channel should be configured to  be
	      binary.	Tcl  will then assign no interpretation to the data in
	      the file and simply read or write raw  bytes.   The  Tcl	binary
	      command can be used to manipulate this byte-oriented data.

	      The default encoding for newly opened channels is the same plat-
	      form- and locale-dependent system encoding used for  interfacing
	      with the operating system.

       -eofchar char

       -eofchar {inChar outChar}
	      This  option supports DOS file systems that use Control-z (\x1a)
	      as an end of file marker.  If char is not an empty string,  then
	      this character signals end-of-file when it is encountered during
	      input.  For output, the end-of-file character is output when the
	      channel  is  closed.  If char is the empty string, then there is
	      no special end of file character marker.	For  read-write  chan-
	      nels,  a	two-element  list specifies the end of file marker for
	      input and output, respectively.  As a convenience, when  setting
	      the end-of-file character for a read-write channel you can spec-
	      ify a single value that will apply to both reading and  writing.
	      When querying the end-of-file character of a read-write channel,
	      a two-element list will always be returned.  The	default  value
	      for  -eofchar  is the empty string in all cases except for files
	      under Windows.  In that case the -eofchar  is  Control-z	(\x1a)
	      for reading and the empty string for writing.

       -translation mode

       -translation {inMode outMode}
	      In  Tcl  scripts the end of a line is always represented using a
	      single newline character (\n).  However,	in  actual  files  and
	      devices the end of a line may be represented differently on dif-
	      ferent platforms, or even for  different	devices  on  the  same
	      platform.   For  example, under UNIX newlines are used in files,
	      whereas carriage-return-linefeed sequences are normally used  in
	      network  connections.   On  input (i.e., with gets and read) the
	      Tcl I/O system automatically translates the external end-of-line
	      representation into newline characters.  Upon output (i.e., with
	      puts), the I/O system translates newlines to the	external  end-
	      of-line  representation.	 The  default  translation mode, auto,
	      handles all the common cases automatically, but the -translation
	      option  provides	explicit control over the end of line transla-
	      tions.

	      The value associated with -translation  is  a  single  item  for
	      read-only  and  write-only channels.  The value is a two-element
	      list for read-write channels; the read translation mode  is  the
	      first element of the list, and the write translation mode is the
	      second element.  As a convenience, when setting the  translation
	      mode  for  a  read-write	channel you can specify a single value
	      that will apply to both reading and writing.  When querying  the
	      translation  mode  of  a	read-write channel, a two-element list
	      will always be returned.	The  following	values	are  currently
	      supported:

	      auto   As the input translation mode, auto treats any of newline
		     (lf), carriage return (cr), or carriage  return  followed
		     by  a  newline  (crlf) as the end of line representation.
		     The end of line representation can even change from line-
		     to-line,  and  all cases are translated to a newline.  As
		     the output translation mode, auto chooses a platform spe-
		     cific  representation;  for  sockets on all platforms Tcl
		     chooses crlf, for all Unix flavors, it  chooses  lf,  for
		     the  Macintosh platform it chooses cr and for the various
		     flavors of Windows it chooses crlf.  The default  setting
		     for -translation is auto for both input and output.

	      binary No  end-of-line  translations  are  performed.   This  is
		     nearly identical to lf  mode,  except  that  in  addition
		     binary  mode  also  sets the end-of-file character to the
		     empty string (which disables it) and sets the encoding to
		     binary  (which  disables  encoding  filtering).   See the
		     description of -eofchar and -encoding for	more  informa-
		     tion.

	      cr     The  end  of  a  line in the underlying file or device is
		     represented by a single carriage  return  character.   As
		     the  input  translation  mode,  cr mode converts carriage
		     returns to newline characters.  As the output translation
		     mode,  cr	mode translates newline characters to carriage
		     returns.  This mode is typically used on Macintosh  plat-
		     forms.

	      crlf   The  end  of  a  line in the underlying file or device is
		     represented by a carriage return character followed by  a
		     linefeed  character.  As the input translation mode, crlf
		     mode converts carriage-return-linefeed sequences to  new-
		     line  characters.	 As  the output translation mode, crlf
		     mode translates newline  characters  to  carriage-return-
		     linefeed  sequences.  This mode is typically used on Win-
		     dows platforms and for network connections.

	      lf     The end of a line in the underlying  file	or  device  is
		     represented by a single newline (linefeed) character.  In
		     this mode no translations occur during  either  input  or
		     output.  This mode is typically used on UNIX platforms.


STANDARD CHANNELS
       The Tcl standard channels (stdin, stdout, and stderr) can be configured
       through this command  like  every  other  channel  opened  by  the  Tcl
       library.  Beyond  the  standard	options described above they will also
       support any special option according to their current  type.   If,  for
       example,  a  Tcl application is started by the inet super-server common
       on Unix system its Tcl standard channels will be sockets and thus  sup-
       port the socket options.

EXAMPLES
       Instruct  Tcl  to  always send output to stdout immediately, whether or
       not it is to a terminal: fconfigure stdout -buffering none

       Open a socket and read lines from it without ever blocking the process-
       ing  of other events: set s [socket some.where.com 12345] fconfigure $s
       -blocking 0 fileevent $s readable "readMe $s" proc readMe chan {
	  if {[gets $chan line] < 0} {
	     if {[eof $chan]} {
		close $chan
		return
	     }
	     # Could not read a complete line this time; Tcl's
	     # internal buffering will hold the partial line for us
	     # until some more data is available over the socket.
	  } else {
	     puts stdout $line
	  } }

       Read a PPM-format image from a file: # Open the file and  put  it  into
       Unix  ASCII  mode set f [open teapot.ppm] fconfigure $f -encoding ascii
       -translation lf

       # Get the header if {[gets $f] ne "P6"} {
	  error "not a raw-bits PPM" }

       # Read lines until we have got non-comment lines # that supply us  with
       three decimal values.  set words {} while {[llength $words] < 3} {
	  gets $f line
	  if {[string match "#*" $line]} continue
	  lappend words [eval concat [scan $line %d%d%d]] }

       #  Those words supply the size of the image and its # overall depth per
       channel. Assign to  variables.	foreach  {xSize  ySize	depth}	$words
       {break}

       # Now switch to binary mode to pull in the data, # one byte per channel
       (red,green,blue) per pixel.  fconfigure $f -translation binary set num-
       DataBytes [expr {3 * $xSize * $ySize}] set data [read $f $numDataBytes]

       close $f


SEE ALSO
       close(n), flush(n),  gets(n),  open(n),	puts(n),  read(n),  socket(n),
       Tcl_StandardChannels(3)


KEYWORDS
       blocking,  buffering, carriage return, end of line, flushing, linemode,
       newline, nonblocking, platform,	translation,  encoding,  filter,  byte
       array, binary



Tcl				      8.3			 fconfigure(n)
=29744
+80
(15)