Provided by: c3270_3.3.4p6-3.3_i386 bug


       c3270 - curses-based IBM host access tool


       c3270 [options] [host]


       c3270 opens a telnet connection to an IBM host in a console window.  It
       implements RFCs  2355  (TN3270E),  1576  (TN3270)  and  1646  (LU  name
       selection),  and  supports  IND$FILE  file transfer.  If the console is
       capable  of  displaying  colors,  then  c3270  emulates  an  IBM  3279.
       Otherwise, it emulates a 3278.

       The full syntax for host is:

       Prepending  a  P: onto hostname causes the connection to go through the
       telnet-passthru service rather than directly to the host.  See PASSTHRU

       Prepending  an  S:  onto  hostname  removes  the "extended data stream"
       option reported to the host.  See -tn below for further information.

       Prepending an N: onto  hostname  turns  off  TN3270E  support  for  the

       Prepending  an  L:  onto  hostname  causes c3270 to first create an SSL
       tunnel to the host, and then create a TN3270 session inside the tunnel.
       (This  function  is  supported  only  if  c3270  was built with SSL/TLS
       support).  Note that TLS-encrypted sessions using the TELNET  START-TLS
       option  are  negotiated with the host automatically; for these sessions
       the L: prefix should not be used.

       A specific LU name to use may be specified  by  prepending  it  to  the
       hostname  with  an  ‘@’.   Multiple LU names to try can be separated by
       commas.  An empty LU can be placed in the list with an extra comma.

       The hostname may optionally be placed inside square-bracket  characters
       ‘[’  and  ‘]’.   This  will  prevent  any  colon  ‘:’ characters in the
       hostname from being interpreted as indicating option prefixes  or  port
       numbers.  This allows numeric IPv6 addresses to be used as hostnames.

       On  systems  that support the forkpty library call, the hostname may be
       replaced with -e and a  command  string.   This  will  cause  c3270  to
       connect to a local child process, such as a shell.

       The port to connect to defaults to telnet.  This can be overridden with
       the -port option, or by appending a port to the hostname with  a  colon
       ‘:’.   (For  compatability  with  previous  versions  of c3270 and with
       tn3270(1), the port  may  also  be  specified  as  a  second,  separate


        c3270 understands the following options:

              Forces  all characters to be displayed in bold.  This helps with
              PC consoles which display non-bold characters in unreadably  dim

       -altscreen rowsxcols=init_string
              Defines  the  dimensions  and  escape sequence for the alternate
              (132-column) screen mode.  See SCREEN SIZE SWITCHING, below.

              Causes c3270 to operate in cbreak mode, instead of raw mode.  In
              cbreak  mode,  the TTY driver will properly process XOFF and XON
              characters, which are required  by  some  terminals  for  proper
              operation.   However,  those  characters (usually ^S and ^Q), as
              well as the characters for interrupt, quit, and  lnext  (usually
              ^C,  ^\  and  ^V  respectively)  will  be  seen by c3270 only if
              preceded by the lnext character.  The  susp  character  (usually
              ^Z) cannot be seen by c3270 at all.

       -charset name
              Specifies  an  EBCDIC  host  character  set.  See CHARACTER SETS

       -clear toggle
              Sets the initial value of toggle to false.  The list  of  toggle
              names is under TOGGLES below.

       -defscreen rowsxcols=init_string
              Defines  the  dimensions  and  escape  sequence  for the default
              (80-column) screen mode.  See SCREEN SIZE SWITCHING, below.

       -hostsfile file
              Uses file as the hosts file, which allows aliases for host names
              and  scripts  to  be  executed  at  login.  See ibm_hosts(1) for

       -im method
              Specifies the name of the input method  to  use  for  multi-byte
              input.   (Supported  only  when  c3270  is  compiled  with  DBCS

       -keymap name
              Specifies  a  keyboard  map  to  be  found   in   the   resource
      or  the  file  name.   See  KEYMAPS below for

       -km name
              Specifies the local encoding method for multi-byte  text.   name
              is  an  encoding name recognized by the ICU library.  (Supported
              only when c3270 is compiled with  DBCS  support,  and  necessary
              only when c3270 cannot figure it out from the locale.)

       -model name
              The  model of 3270 display to be emulated.  The model name is in
              two parts, either of which may be omitted:

              The first part is the base model, which is either 3278 or  3279.
              3278 specifies a monochrome 3270 display; 3279 specifies a color
              3270 display.

              The second part is the model number, which specifies the  number
              of rows and columns.  Model 4 is the default.

                            Model Number   Columns   Rows
                                 2           80       24
                                 3           80       30
                                 4           80       43
                                 5           132      27

              Note:  Technically, there is no such 3270 display as a 3279-4 or
              3279-5, but most hosts seem to work with them anyway.

              The default  model  for  a  color  display  is  3279-4.   For  a
              monochrome display, it is 3278-4.

       -mono  Forces 3278 emulation.

       -oversize colsxrows
              Makes  the  screen  larger than the default for the chosen model
              number.   This  option  has  effect  only  in  combination  with
              extended data stream support (controlled by the "c3270.extended"
              resource), and  only  if  the  host  supports  the  Query  Reply
              structured  field.   The  number  of  columns  multiplied by the
              number of rows must not exceed 16383 (3fff hex),  the  limit  of
              14-bit 3270 buffer addressing.

       -port n
              Specifies  a  different TCP port to connect to.  n can be a name
              from /etc/services  like  telnet,  or  a  number.   This  option
              changes  the default port number used for all connections.  (The
              positional parameter affects only the initial connection.)

       -printerlu luname
              Causes c3270 to automatically start a  pr3287  printer  session.
              If  luname  is  ".", then the printer session will be associated
              with the interactive terminal session (this  requires  that  the
              host  support  TN3270E).   Otherwise,  the  value is used as the
              explicit LU name to associate with the printer session.

              Disables the interactive c3270> prompt.  When used,  a  hostname
              must be provided on the command line.

       -set toggle
              Sets  the  initial  value of toggle to true.  The list of toggle
              names is under TOGGLES below.

       -tn name
              Specifies the terminal name to be transmitted  over  the  telnet
              connection.   The default name is IBM-model_name-E, for example,
              IBM-3279-4-E  for  a  color  display,  or  IBM-3278-4-E  for   a
              monochrome display.

              Some  hosts  are confused by the -E suffix on the terminal name,
              and will ignore the extra screen area on  models  3,  4  and  5.
              Prepending   an   s:   on   the   hostname,   or   setting   the
              "c3270.extended" resource to "false", removes the  -E  from  the
              terminal name when connecting to such hosts.

              The  name  can  also  be  specified  with  the  "c3270.termName"

       -trace Turns on data stream and event tracing at startup.  The  default
              trace file name is /tmp/x3trc.process_id.

       -tracefile file
              Specifies  a  file  to  save  data stream and event traces into,
              overriding the default of /tmp/x3trc.process_id.

       -tracefilesize size
              Places a limit on the size of a trace file.  If this  option  is
              not specified, or is specified as 0 or none, the trace file will
              be unlimited.  If  specified,  the  trace  file  cannot  already
              exist,  and  the  (silently enforced) minimum size is 64 Kbytes.
              The value of size can have a K or M suffix, indicating kilobytes
              or megabytes respectively.

       -xrm "c3270.resource: value"
              Sets  the  value  of  the  named  resource  to value.  Resources
              control  less  common  c3270  options,  and  are  defined  under
              RESOURCES below.


       The -charset option or the "c3270.charset" resource controls the EBCDIC
       host character set used by c3270.  Available sets include:

                Charset Name         Code Page   Display Character
                apl                  37          3270cg-1a
                belgian              500         3270cg-1a 3270-cg1
                bracket              37          3270cg-1a 3270-cg1
                brazilian            275         3270cg-1a 3270-cg1
                finnish              278         3270cg-1a 3270-cg1
                french               297         3270cg-1a 3270-cg1
                german               273         3270cg-1a 3270-cg1
                icelandic            871         3270cg-1a 3270-cg1
                iso-hebrew           424         iso8859-8
                iso-turkish          1026        iso8859-9
                italian              280         3270cg-1a 3270-cg1
                japanese             1027+300    jisx0201.1976-0 +
                norwegian            277         3270cg-1a 3270-cg1
                russian              880         koi8-r
                simplified-chinese   836+837     3270cg-1a iso8859-1
                                                 + gb2312.1980-0
                slovenian            870         iso8859-2
                thai                 838         iso8859-11
                uk                   285         3270cg-1a 3270-cg1
                us-intl              37          3270cg-1a 3270-cg1

       The  default  character  set is bracket, which is useful for common IBM
       hosts which use EBCDIC  codes  0xAD  and  0xBD  for  the  ‘[’  and  ‘]’
       characters, respectively.


       c3270 uses the ibm_hosts database to define aliases for host names, and
       to specify macros to be executed when a connection is first made.   See
       ibm_hosts(5) for details.

       You   may   specify   a   different   ibm_hosts   database   with   the
       "c3270.hostsFile" resource.


       Some hosts use an ASCII front-end to do initial login negotiation, then
       later  switch  to  3270 mode.  c3270 will emulate an ANSI X.64 terminal
       until the host places it in 3270  mode  (telnet  BINARY  and  SEND  EOR
       modes, or TN3270E mode negotiation).

       If  the  host  later negotiates to stop functioning in 3270 mode, c3270
       will return to ANSI emulation.

       In NVT mode, c3270 supports both character-at-a-time mode and line mode
       operation.   You  may select the mode with a menu option.  When in line
       mode,  the  special  characters  and  operational  characteristics  are
       defined by resources:

                    Mode/Character          Resource     Default
                    Translate CR to NL    c3270.icrnl     true
                    Translate NL to CR    c3270.inlcr     false
                    Erase previous        c3270.erase      ^?
                    Erase entire line      c3270.kill      ^U
                    Erase previous word   c3270.werase     ^W
                    Redisplay line        c3270.rprnt      ^R
                    Ignore special        c3270.lnext      ^V
                    meaning of next
                    Interrupt              c3270.intr      ^C
                    Quit                   c3270.quit      ^\
                    End of file            c3270.eof       ^D

       Separate keymaps can be defined for use only when c3270 is in 3270 mode
       or NVT mode.  See KEYMAPS for details.


       c3270 has a number of configurable modes which may be selected  by  the
       -set and -clear options.

              If set, c3270 operates in uppercase-only mode.

              If  set, c3270 behaves in some un-3270-like ways.  First, when a
              character is typed into a field, all nulls in the field  to  the
              left of that character are changed to blanks.  This eliminates a
              common  3270  data-entry  surprise.   Second,  in  insert  mode,
              trailing  blanks  in a field are treated like nulls, eliminating
              the annoying ‘lock-up’ that often occurs when inserting into  an
              field with (apparent) space at the end.

              If  set,  the  ANSI  terminal  emulator  automatically assumes a
              NEWLINE character when it reaches the end of a line.

       The names of the toggles for use with the -set and -clear  options  are
       as follows:

                        Option                   Name
                        Monocase                 monoCase
                        Blank Fill               blankFill
                        Track Cursor             cursorPos
                        Trace Data Stream        dsTrace
                        Trace Events             eventTrace
                        Save Screen(s) in File   screenTrace
                        Wraparound               lineWrap

       These  names are also used as the first parameter to the Toggle action.


       If the terminal that c3270 is running on has at least one more row that
       the  3270  model  requires  (e.g.,  25  rows for a model 2), c3270 will
       display a status line.  The c3270 status line  contains  a  variety  of
       information.  From left to right, the fields are:

       comm status
              Three  symbols indicate the state of the connection to the host.
              If connected, the right-hand symbol is a solid box; if  not,  it
              is a question mark.

       keyboard lock
              If  the  keyboard  is  locked, an "X" symbol and a message field
              indicate the reason for the keyboard lock.

              The letter "T" indicates that one or more keystrokes are in  the
              typeahead buffer.

       temporary keymap
              The letter "K" indicates that a temporary keymap is in effect.

              The  letter  "R" indicates that the keyboard is in reverse field
              entry mode.

       insert mode
              The letter "I" indicates that the keyboard is in insert mode.

       printer session
              The letter "P" indicates that a pr3287 session is active.

       LU name
              The LU name associated with the session, if there is one.

       cursor position
              The cursor row and column are optionally displayed, separated by
              a "/".


       Here  is  a  complete  list  of  basic  c3270 actions.  Script-specific
       actions are described on the x3270-script(1) manual page.

       Actions marked with an asterisk (*) may block, sending data to the host
       and possibly waiting for a response.

           *Attn                            attention key
           BackSpace                        move cursor left (or send
                                            ASCII BS)
           BackTab                          tab to start of previous input
           CircumNot                        input "^" in NVT mode, or
                                            "notsign" in 3270 mode
           *Clear                           clear screen
           Compose                          next two keys form a special
           *Connect(host)                   connect to host
           *CursorSelect                    Cursor Select AID
           Delete                           delete character under cursor
                                            (or send ASCII DEL)
           DeleteField                      delete the entire field
           DeleteWord                       delete the current or previous
           *Disconnect                      disconnect from host
           Down                             move cursor down
           Dup                              duplicate field
           *Enter                           Enter AID (or send ASCII CR)
           Erase                            erase previous character (or
                                            send ASCII BS)
           EraseEOF                         erase to end of current field
           EraseInput                       erase all input fields
           Escape                           escape to c3270> prompt
           Execute(cmd)                     execute a command in a shell
           FieldEnd                         move cursor to end of field
           FieldMark                        mark field
           HexString(hex_digits)            insert control-character
           Home                             move cursor to first input
           Insert                           set insert mode
           *Interrupt                       send TELNET IP to host
           Key(keysym)                      insert key keysym

           Key(0xxx)                        insert key with ASCII code xx
           Left                             move cursor left
           Left2                            move cursor left 2 positions
           MonoCase                         toggle uppercase-only mode
           MoveCursor(row, col)             move cursor to (row,col)
           Newline                          move cursor to first field on
                                            next line (or send ASCII LF)
           NextWord                         move cursor to next word
           *PA(n)                           Program Attention AID (n from
                                            1 to 3)
           *PF(n)                           Program Function AID (n from 1
                                            to 24)
           PreviousWord                     move cursor to previous word
           Printer(Start[,lu]|Stop)         Start or stop printer session
           PrintText(command)               print screen text on printer
           Quit                             exit c3270
           Redraw                           redraw window
           Reset                            reset locked keyboard
           Right                            move cursor right
           Right2                           move cursor right 2 positions
           *Script(command[,arg...])        run a script
           *String(string)                  insert string (simple macro
           *SysReq                          System Request AID
           Tab                              move cursor to next input
           Toggle(option[,set|clear])       toggle an option
           ToggleInsert                     toggle insert mode
           ToggleReverse                    toggle reverse-input mode
           *Transfer(option=value...)       file transfer
           Up                               move cursor up
           ignore                           do nothing

       Any  of  the  above  actions may be entered at the c3270> prompt; these
       commands are also available for use in keymaps (see KEYMAPS).   Command
       names   are   case-insensitive.    Parameters  can  be  specified  with
       parentheses and commas, e.g.:
       or with spaces, e.g.:
              PF 1
       Parameters can be quoted with double-quote characters, to allow spaces,
       commas, and parentheses to be used.

       c3270 also supports the following interactive commands:

       Help   Displays a list of available commands.

       Show   Displays statistics and settings.

       Trace  Turns  tracing  on  or  off.   The command trace on enables data
              stream  and  keyboard  event  tracing;  the  command  trace  off
              disables  it.   The  qualifier data or keyboard can be specified
              before on or off to enable or disable a particular trace.  After
              on,  a  filename  may be specified to override the default trace
              file name of /tmp/


       The -keymap option allows a keymap to  be  specified.   If  the  option
       -keymap  xxx  is given, then c3270 will first look for a resource named; if that is not found, then it will look  for  a  file
       named xxx.

       Multiple  keymaps  may  be  specified  be  separating  their names with
       commas.  Definitions  in  later  keymaps  supercede  those  in  earlier

       In  addition,  separate  keymaps may be defined that apply only in 3270
       mode or only  in  NVT  mode.   For  example,  the  resource  definition  will  augment the definition of,
       when  c3270  is  in  NVT  mode.   Similarly,  the  resource  definition  will augment the definition of,
       when c3270 is in 3270 mode.

       Keymaps specify actions to perform when a particular sequence  of  keys
       is pressed.  Each line in a keymap has the following syntax:

              [Meta][Ctrl]<Key>key...: Action[(param[,...])] ...

       For example:

              Meta<Key>c: Clear()
              <Key>PPAGE: PF(7)
              Ctrl<Key>A <Key>F1: PF(13)

       The  optional  Meta  or  Ctrl qualifiers specify that the Meta and Ctrl
       keys are pressed along with the specified key, respectively.   The  key
       is  either  a  valid X11 keysym (these are the ISO 8859-1 symbol names,
       such as equal for ‘=’ and a for ‘a’) or a valid  symbolic  ncurses  key
       name,  such  as  UP.   The  Action  is an action from the ACTIONS list,
       above.  More than one action may be  specified.   (Note  that  symbolic
       ncurses  key  names can be used only if the c3270.cursesKeymap resource
       is set to True, which enables ncurses keymap mode.)

       Keymap entries are case-sensitive and  modifier-specific.   This  means
       that a keymap for the b key will match only a lowercase b.  Actions for
       uppercase B, or for Meta-b or Control-B, must be specified  separately.

       The base keymap is:

       Key                     Action
       Ctrl<Key>]              Escape
       Ctrl<Key>a Ctrl<Key>a   Key(0x01)
       Ctrl<Key>a Ctrl<Key>]   Key(0x1d)
       Ctrl<Key>a <Key>Tab     BackTab
       Ctrl<Key>a <Key>c       Clear
       Ctrl<Key>a <Key>e       Escape
       Ctrl<Key>a <Key>r       Reset
       Ctrl<Key>a <Key>l       Redraw
       Ctrl<Key>a <Key>m       Compose
       Ctrl<Key>a <Key>^       Key(notsign)
       <Key>UP                 Up
       <Key>DOWN               Down
       <Key>LEFT               Left
       <Key>RIGHT              Right
       <Key>F(n)               PF(n)
       Ctrl<Key>a <Key>F(n)    PF(n+12)
       Ctrl<Key>a <Key>1       PA(1)
       Ctrl<Key>a <Key>2       PA(2)
       Ctrl<Key>a <Key>3       PA(3)

       The base 3270-mode keymap adds:

       Key              Action
       Ctrl<Key>c       Clear
       Ctrl<Key>r       Reset
       Ctrl<Key>l       Redraw
       <Key>Tab         Tab
       <Key>DC          Delete
       <Key>BACKSPACE   BackSpace
       <Key>BackSpace   BackSpace
       <Key>Return      Enter
       <Key>Linefeed    Newline


       Some  keyboards do not have a Meta key.  Instead, they have an Alt key.
       Sometimes this key acts as a proper Meta key, that is, it is a modifier
       key that sets the high-order bit (0x80) in the code that is transmitted
       for each key.  Other keyboards send a two-character sequence  when  the
       Alt  key  is  pressed  with  another  key: the Escape character (0x1b),
       followed by the code for the other key.

       The resource c3270.metaEscape and the termcap km attribute control  how
       c3270  will interpret these sequences.  When c3270.metaEscape is set to
       true, or when c3270.metaEscape is  set  to  auto  and  the  termcap  km
       attribute  is set, the keyboard is assumed to have a separate Meta key.
       The Escape key can be used as an ordinary data key and has  no  special

       When  c3270.metaEscape  is set to true, or when c3270.metaEscape is set
       to auto and the termcap km  attribute  is  not  set,  the  keyboard  is
       assumed  to  use  the Escape character as a prefix to indicate that the
       following character is supposed to have the high-order bit  set.   When
       c3270  sees  an  Escape  character  from  the keyboard, it sets a short
       timeout.  If another character arrives before the timeout expires, then
       c3270  will  combine  the two characters, setting the high-order bit of
       the second.  In an event trace file, the combined character  is  listed
       as  derived.   In  a  keymap,  only  the combined character or the Meta
       prefix may be used.  The Escape key can still be used  by  itself,  but
       only if there is a short pause before pressing another key.

       The default value for c3270.metaEscape is auto.


       The  Transfer  action  implements  IND$FILE file transfer.  This action
       requires that the IND$FILE program be installed on the  IBM  host,  and
       that  the  3270  cursor be located in a field that will accept a TSO or
       VM/CMS command.

       Because of the complexity and number of options for file transfer,  the
       parameters to the Transfer action take the unique form of option=value,
       and can appear in any order.  The options are:

       Option           Required?   Default   Other Values
       Direction           No       send      receive
       HostFile            Yes
       LocalFile           Yes
       Host                No       tso       vm
       Mode                No       ascii     binary
       Cr                  No       remove    add, keep
       Exist               No       keep      replace, append
       Recfm               No                 fixed, variable,
       Lrecl               No
       Blksize             No
       Allocation          No                 tracks,
       PrimarySpace        No
       SecondarySpace      No
       BufferSize          No       4096

       The option details are as follows.

              send  (the  default)  to  send  a  file  to the host, receive to
              receive a file from the host.

              The name of the file on the host.

              The name of the file on the local workstation.

       Host   The type of host  (which  dictates  the  form  of  the  IND$FILE
              command): tso (the default) or vm.

       Mode   Use  ascii  (the  default)  for  a  text  file,  which  will  be
              translated between EBCDIC and ASCII as  necessary.   Use  binary
              for non-text files.

       Cr     Controls  how  Newline  characters are handled when transferring
              Mode=ascii  files.   remove   (the   default)   strips   Newline
              characters  in local files before transferring them to the host.
              add adds Newline characters to  each  host  file  record  before
              transferring  it  to  the  local  workstation.   keep  preserves
              Newline characters when transferring a local file to the host.

       Exist  Controls what happens when the destination file already  exists.
              keep  (the  default)  preserves  the  file, causing the Transfer
              action to fail.  replace overwrites the  destination  file  with
              the  source  file.   append  appends  the  source  file  to  the
              destination file.

       Recfm  Controls the record   of  files  created  on  the  host.   fixed
              creates  a  file  with fixed-length records.  variable creates a
              file with variable-length records.   undefined  creates  a  file
              with  undefined-length  records  (TSO  hosts  only).   The Lrecl
              option controls the record length or maximum record  length  for
              Recfm=fixed and Recfm=variable files, respectively.

       Lrecl  Specifies the record length (or maximum record length) for files
              created on the host.

              Specifies the block size for files created on  the  host.   (TSO
              hosts only.)

              Specifies   the   units   for  the  TSO  host  PrimarySpace  and
              SecondarySpace options: tracks, cylinders or avblock.

              Primary allocation for a file created on a TSO host.  The  units
              are given by the Allocation option.

              Secondary  allocation  for  a  file  created on a TSO host.  The
              units are given by the Allocation option.

              Buffer size for DFT-mode  transfers.   Can  range  from  256  to
              32768.   Larger  values  give better performance, but some hosts
              may not be able to support them.


       There are several types of script functions available.

       The String Action
              The simplest method for scripting is  provided  via  the  String
              action.   The  arguments to String are one or more double-quoted
              strings  which  are  inserted  directly  as  if  typed.   The  C
              backslash conventions are honored as follows.  (Entries marked *
              mean that after sending the AID code to  the  host,  c3270  will
              wait  for  the  host  to  unlock  the  keyboard  before  further
              processing the string.)

              \b      Left
              \f      Clear*
              \n      Enter*
              \pan    PA(n)*
              \pfnn   PF(nn)*
              \r      Newline
              \t      Tab
              \T      BackTab

              An example keymap entry would be:
              Meta<Key>p: String("probs clearrdr\n")

              Note: The strings are in  ASCII  and  converted  to  EBCDIC,  so
              beware of inserting control codes.

              There is also an alternate form of the String action, HexString,
              which is used to  enter  non-printing  data.   The  argument  to
              HexString  is a string of hexadecimal digits, two per character.
              A leading 0x or 0X is optional.  In 3270 mode,  the  hexadecimal
              data  represent  EBCDIC  characters,  which are entered into the
              current field.  In NVT  mode,  the  hexadecimal  data  represent
              ASCII characters, which are sent directly to the host.

       The Script Action
              This  action  causes  c3270  to  start a child process which can
              execute c3270 actions.  Standard input and output from the child
              process  are  piped  back  to c3270.  The Script action is fully
              documented in x3270-script(1).


       c3270 allows the direct entry of accented letters and special  symbols.
       Pressing  and  releasing the "Compose" key, followed by two other keys,
       causes entry of the symbol combining  those  two  keys.   For  example,
       "Compose"  followed  by the "C" key and the "," (comma) key, enters the
       "C-cedilla" symbol.  A  C  on  the  status  line  indicates  a  pending
       composite character.

       The  mappings between these pairs of ordinary keys and the symbols they
       represent is controlled by the "c3270.composeMap"  resource;  it  gives
       the   name   of  the  map  to  use.   The  maps  themselves  are  named
       "".  The default is "latin1", which gives mappings
       for  most  of  the symbols in the ISO 8859-1 Latin-1 character set that
       are not in the 7-bit ASCII character set.

       Note: The default keymap defines Meta<Key>m as the "Compose" key.   You
       may  set  up  your own "Compose" key with a keymap that maps some other
       keysym onto the Compose action.


       c3270 supports associated printer sessions via the  pr3287(1)  program.
       The Printer action is used to start or stop a pr3287 session.

       The  action Printer Start starts a printer session, associated with the
       current LU.  (This works only if the host supports TN3270E.)

       The action Printer Start lu starts a printer session, associated with a
       specific lu.

       The action Printer Stop stops a printer session.

       The  resource c3270.printer.command specifies the command used to print
       each     job;     it     defaults     to     lpr.      The     resource
       c3270.printer.assocCommandLine  specifies  the command used to start an
       associated printer session.  It defaults to:

              pr3287 -assoc %L% -command "%C%" %H%

       The resource c3270.printer.luCommandLine specifies the command used  to
       start a specific-LU printer session.  It defaults to:

              pr3287 -command "%C%" %L%@%H%

       When  the  printer  session command is run, the following substitutions
       are made:

       Token   Substitition
       %C%     Command (value of
       %H%     Host IP address
       %L%     Current or specified LU

       See pr3287(1) for further details.


       c3270   supports  the  Sun  telnet-passthru  service  provided  by  the
       in.telnet-gw server.  This allows outbound telnet connections through a
       firewall  machine.   When  a  p: is prepended to a hostname, c3270 acts
       much like the  itelnet(1)  command.   It  contacts  the  machine  named
       internet-gateway  at  the  port  defined  in  /etc/services  as telnet-
       passthru (which defaults  to  3514).   It  then  passes  the  requested
       hostname and port to the in.telnet-gw server.


       When  running  as a 3270 Model 5, c3270 can take advantage of terminals
       that can switch between 80 and 132 column modes.

       Because the curses library does not support mode switching, the  escape
       sequences  and resulting screen dimensions must be specified explicitly
       to c3270.  These are  specified  with  the  -altscreen  and  -defscreen
       command-line   options,  or  the  altScreen  and  defScreen  resources.
       -altscreen  or  altScreen  defines  the  alternate  (132-column)  mode;
       -defscreen or defScreen defines the default (80-column) mode.

       The  syntax  for  the  options  and resources is rowsxcols=init_string,
       where rows and cols give the screen dimensions, and init_string is  the
       escape  sequence  to  transmit to the terminal to enter that mode.  For
       defscreen, the minimum dimensions are 24  rows  and  80  columns.   For
       altscreen,  the minimum dimensions are 27 rows and 132 columns.  Within
       init_string, the usual escape sequences are supported (\E  for  escape,
       \r, \b, etc.).  For example, the init string for a 132-column xterm is:


       Note: When defscreen and altscreen are specified, the model  number  is
       always set to 5.


       Certain  c3270  options can be configured via resources.  Resources are
       defined in the file .c3270pro in the user’s home directory, and by -xrm
       options.   The  definitions  are  similar  to  X11 resources, and use a
       similar syntax.  The resources available in c3270 are:

       Resource       Default    Option           Purpose
       allBold        Auto       -allbold         Display all
                                                  characters bold
       altScreen                 -altscreen       132-col screen
       blankFill      False      -set blankFill   Blank Fill mode
       charset        bracket    -charset         EBCDIC character
                                                  set                                Definition of
                                                  character set
       composeMap     latin1                      Name of
                                                  character map
       cursesKeymap   True                        Set curses
                                                  keymap option
       defScreen                 -defscreen       80-col screen
       dsTrace        False      -trace           Data stream
       eof            ^D                          NVT-mode EOF
       erase          ^H                          NVT-mode erase
       extended       True                        Use 3270
                                                  extended data
       eventTrace     False      -trace           Event tracing

       ftCommand      ind$file                    Host file
                                                  transfer command
       hostsFile                 -hostsfile       Host alias/macro
       icrnl          False                       Map CR to NL on
                                                  NVT-mode input
       inlcr          False                       Map NL to CR in
                                                  NVT-mode input
       intr           ^C                          NVT-mode
       keymap                    -keymap          Keyboard map
                                                  name                                 Definition of
                                                  keymap foo
       kill           ^U                          NVT-mode kill
       lineWrap       False      -set lineWrap    NVT line wrap
       lnext          ^V                          NVT-mode lnext
       m3279          (note 1)   -mono            3279 (color)
       metaEscape     Auto                        Interpret ESC-x
                                                  as Meta-x
       monoCase       False      -set monoCase    Mono-case mode
       numericLock    False                       Lock keyboard
                                                  for numeric
                                                  field error
       oerrLock       True                        Lock keyboard
                                                  for input error
       oversize                  -oversize        Oversize screen
       port           telnet     -port            Non-default TCP
       printer.*      (note 4)                    Printer session
       quit           ^\                          NVT-mode quit
       rprnt          ^R                          NVT-mode reprint
       secure         False                       Disable
       termName       (note 2)   -tn              TELNET terminal
                                                  type string
       traceDir       /tmp                        Directory for
                                                  trace files
       traceFile      (note 3)   -tracefile       File for trace
       typeahead      True                        Allow typeahead
       werase         ^W                          NVT-mode word-
                                                  erase character

              Note 1: m3279 defaults to True if the terminal  supports  color,
              False  otherwise.   It  can  be  forced  to False with the -mono

              Note 2: The default terminal type string is constructed from the
              model  number,  color emulation, and extended data stream modes.
              E.g., a model 2 with  color  emulation  and  the  extended  data
              stream  option  would  be  sent as IBM-3279-2-E.  Note also that
              when TN3270E mode is used, the terminal type is always  sent  as
              some type of 3278.

              Note  3:  The  default  trace file is in the directory
              specified by the traceDir resource.

              Note 4: See PRINTER SUPPORT for details.

       In .c3270pro, lines are continued with a backslash character.

       -xrm options override definitions found in .c3270pro.  If more than one
       -xrm option is given for the same resource, the last one on the command
       line is used.




       x3270(1),   s3270(1),   tcl3270(1),   ibm_hosts(5),    x3270-script(1),
       pr3287(1), telnet(1), tn3270(1)
       Data Stream Programmer’s Reference, IBM GA23-0059
       Character Set Reference, IBM GA27-3831
       RFC 1576, TN3270 Current Practices
       RFC 1646, TN3270 Extensions for LUname and Printer Selection
       RFC 2355, TN3270 Enhancements


       Modifications Copyright 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001,
       2002, 2004 by Paul Mattes.
       Original X11 Port Copyright 1990 by Jeff Sparkes.
              Permission to use, copy, modify, and  distribute  this  software
              and  its documentation for any purpose and without fee is hereby
              granted, provided that the above copyright notice appear in  all
              copies  and  that both that copyright notice and this permission
              notice appear in supporting documentation.
       Copyright 1989 by Georgia Tech Research Corporation, Atlanta, GA 30332.
              All  Rights  Reserved.   GTRC  hereby  grants public use of this
              software.   Derivative  works  based  on  this   software   must
              incorporate this copyright notice.
       c3270  is  distributed  in the hope that it will be useful, but WITHOUT
       ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY  or
       FITNESS  FOR  A  PARTICULAR  PURPOSE.   See  the  file LICENSE for more


       c3270 3.3.4

                                 09 April 2005                        c3270(1)