ENVSUBST(1)                    GNU                    ENVSUBST(1)



NAME
       envsubst - substitutes environment variables in shell for-
       mat strings

SYNOPSIS
       envsubst [OPTION] [SHELL-FORMAT]

DESCRIPTION
       Substitutes the values of environment variables.

   Operation mode:
       -v, --variables
              output the variables occurring in SHELL-FORMAT

   Informative output:
       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       In normal operation mode,  standard  input  is  copied  to
       standard  output, with references to environment variables
       of the form $VARIABLE or ${VARIABLE} being  replaced  with
       the  corresponding  values.   If  a SHELL-FORMAT is given,
       only those environment variables that  are  referenced  in
       SHELL-FORMAT  are  substituted;  otherwise all environment
       variables references occurring in standard input are  sub-
       stituted.

       When  --variables  is used, standard input is ignored, and
       the output consists of the environment variables that  are
       referenced in SHELL-FORMAT, one per line.

AUTHOR
       Written by Bruno Haible.

REPORTING BUGS
       Report bugs to .

COPYRIGHT
       Copyright  (C)  2003-2007  Free  Software Foundation, Inc.
       License   GPLv3+:   GNU   GPL   version   3    or    later
       
       This  is  free software: you are free to change and redis-
       tribute it.  There is NO WARRANTY, to the extent permitted
       by law.

SEE ALSO
       The  full  documentation  for  envsubst is maintained as a
       Texinfo manual.  If the info  and  envsubst  programs  are
       properly installed at your site, the command

              info envsubst

       should give you access to the complete manual.



GNU gettext-runtime 0.17  November 2007               ENVSUBST(1)