---
name: "tcl3270"
section: "1"
platform: "linux"
package: "tcl3270"
version: "4.3ga10-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/tcl3270"
---

# tcl3270(1)

IBM host access tool

## NAME

tcl3270 - IBM host access tool

## SYNOPSIS

**tcl3270** \[*script* \[*script-arg...*\]\] \[-- \[*tcl3270-options*\] \[*s3270-options*\] \[*host*\]\
 **tcl3270** \[*script* \[*script-arg...*\]\] \[-- \[*tcl3270-options*\] \[*s3270-options*\] \[*session-file*.tcl3270\]\
 **tcl3270** -v\
 **tcl3270** --help

## DESCRIPTION

**tcl3270** opens a telnet connection to an IBM host, then allows a Tcl script to control the host login session. It is derived from [*s3270*(1)](/s3270/1.md), a script-based IBM 3270 emulator.

For each action supported by s3270, tcl3270 defines a correcponding Tcl command. The result of the Tcl command is the output of the s3270 action. If the output is one line, the result is a string. If the output is multiple lines, the result is a list of strings.

On the command line, a session file can be named either *name*.**tcl3270** or *name*.**s3270**. Resource values, such as those used in **-xrm** options or in a session file, can be specified as **tcl3270**.*resource* or **s3270**.*resource*.

## TCL3270-SPECIFIC OPTIONS

- **-d**

  Turns on debugging information, tracing data going between tcl3270 and s3270.

## SEE ALSO

[s3270(1)](/s3270/1.md)

## WIKI

Primary documentation for tcl3270 is on the **x3270 Wiki**, https://x3270.miraheze.org/wiki/Main\_Page.

## VERSION

tcl3270 4.3ga10