ENVSUBST(1)                           GNU                          ENVSUBST(1)

       envsubst - substitutes environment variables in shell format strings

       envsubst [OPTION] [SHELL-FORMAT]

       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 substituted.

       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.

       Written by Bruno Haible.

       Report bugs to <bug-gnu-gettext@gnu.org>.

       Copyright © 2003-2007 Free Software Foundation, Inc.  License GPLv3+:
       GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

       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)