qccsetenv.3

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.TH QCCENV 3 "QCCPACK" ""
.SH NAME
QccSetEnv, QccGetEnv \- environment-variable operations
.SH SYNOPSIS
.B #include "libQccPack.h"
.sp
.BI "int QccSetEnv(const char *" environment_variable ", const char *" value );
.br
.BI "int QccGetEnv(const char *" environment_variable ", QccString " returned_value );
.SH DESCRIPTION
.B QccSetEnv()
sets the environment variable whose name is in string
.I environment_variable
to the value contained in string
.IR value ,
if the specified environment variable does not already exist in the
environment.  If the environment variable does already exist in the
environment, 
.B QccSetEnv()
does nothing.
.LP
.B QccGetEnv()
returns the value of the specified
.I environment_variable
as the string
.IR returned_value .
The
.I returned_value
is truncated to 
.B QCCSTRINGLEN
characters, if necessary.
Space for 
.I returned_value
must be allocated prior to calling
.BR QccGetEnv() .
.B QccGetEnv() will return an error if the specified
.I environment_variable
does not exist in the environment.
.SH "RETURNED VALUES"
These routines return 0 on success, and 1 on failure.
In addition, upon error,
.B QccGetEnv()
sets
.I returned_value
to be a zero-length string.
.SH "SEE ALSO"
.BR QccString (3),
.BR QccPack (3),
.BR getenv (3),
.BR putenv (3),
.BR environ (5)
.SH AUTHOR
Copyright (C) 1997-2009  James E. Fowler
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