osx man page for tcl_gethostname

Tcl_GetHostName(3)					      Tcl Library Procedures						Tcl_GetHostName(3)

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NAME
       Tcl_GetHostName - get the name of the local host

SYNOPSIS
       #include <tcl.h>

       const char *
       Tcl_GetHostName()
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DESCRIPTION
       Tcl_GetHostName is a utility procedure used by some of the Tcl commands.  It returns a pointer to a string containing the name for the cur-
       rent machine, or an empty string if the name cannot be determined.  The string is statically allocated, and the caller must not	modify	of
       free it.

KEYWORDS
       hostname

Tcl									8.3							Tcl_GetHostName(3)