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C Library Functions  - system_initenv (3)

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NAME

system_initenv(3f) - [M_system:ENVIRONMENT] initialize environment table pointer and size so table can be read by readenv(3f) (LICENSE:PD)

CONTENTS

Synopsis
Description
Examples

SYNOPSIS

subroutine system_initenv()

DESCRIPTION

A simple interface allows reading the environment variable table of the process. Call system_initenv(3f) to initialize reading the environment table, then call system_readenv(3f) until a blank line is returned. If more than one thread reads the environment or the environment is changed while being read the results are undefined.

EXAMPLES

Sample program:

   program demo_system_initenv
   use M_system, only : system_initenv, system_readenv
   character(len=:),allocatable :: string
      call system_initenv()
      do
         string=system_readenv()
         if(string.eq.’’)then
            exit
         else
            write(*,’(a)’)string
         endif
      enddo
   end program demo_system_initenv

Sample results:

   USERDOMAIN_ROAMINGPROFILE=buzz
   HOMEPATH=\Users\JSU
   APPDATA=C:\Users\JSU\AppData\Roaming
   MANPATH=/home/u/LIBRARY/libGPF/download/GPF/man:/home/u/doc/man:::
   DISPLAYNUM=0
   ProgramW6432=C:\Program Files
   HOSTNAME=buzz
   XKEYSYMDB=/usr/share/X11/XKeysymDB
   PUBLISH_CMD=
   OnlineServices=Online Services
        :
        :
        :

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Nemo Release 3.1

system_initenv (3)

June 29, 2025

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