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<strong>Tornado</strong> 2.0<br />

User’s Guide<br />

9.2.1 The Customer Information Form .................................................... 295<br />

9.2.2 Sending a Technical Support Request (TSR) .................................. 296<br />

9.3 WRS Broadcasts on the World Wide Web .................................................... 301<br />

Appendices ...................................................................................................................... 303<br />

A Directories and Files ....................................................................................................... 305<br />

A.1 Introduction ...................................................................................................... 305<br />

A.2 Host Directories and Files ............................................................................... 306<br />

A.3 Target Directories and Files ............................................................................ 308<br />

A.4 Initialization and State-Information Files ..................................................... 314<br />

B Tcl ...................................................................................................................................... 317<br />

B.1 Why Tcl? ............................................................................................................ 317<br />

B.2 A Taste of Tcl ..................................................................................................... 318<br />

B.2.1 Tcl Variables ........................................................................................ 319<br />

B.2.2 Lists in Tcl ........................................................................................... 320<br />

B.2.3 Associative Arrays ............................................................................. 321<br />

B.2.4 Command Substitution ..................................................................... 321<br />

B.2.5 Arithmetic ........................................................................................... 322<br />

B.2.6 I/O, Files, and Formatting ............................................................... 322<br />

B.2.7 Procedures .......................................................................................... 323<br />

B.2.8 Control Structures .............................................................................. 324<br />

B.2.9 Tcl Error Handling ............................................................................. 324<br />

B.2.10 Integrating Tcl and C Applications ................................................. 325<br />

B.3 Tcl Coding Conventions .................................................................................. 325<br />

B.3.1 Tcl Module Layout ............................................................................. 326<br />

xvi

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