osx man page for tcl_putenv

Tcl_PutEnv(3)						      Tcl Library Procedures						     Tcl_PutEnv(3)

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NAME
       Tcl_PutEnv - procedures to manipulate the environment

SYNOPSIS
       #include <tcl.h>

       int
       Tcl_PutEnv(assignment)

ARGUMENTS
       const char *assignment (in)	    Info  about environment variable in the format "NAME=value".  The assignment argument is in the system
					    encoding.
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DESCRIPTION
       Tcl_PutEnv sets an environment variable. The information is passed in a single string of the form "NAME=value".	This procedure is intended
       to  be  a  stand-in  for the UNIX putenv system call. All Tcl-based applications using putenv should redefine it to Tcl_PutEnv so that they
       will interface properly to the Tcl runtime.

SEE ALSO
       tclvars(n)

KEYWORDS
       environment, variable

Tcl									7.5							     Tcl_PutEnv(3)