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ENVSUBST(1)                           GNU                          ENVSUBST(1)



NAME
       envsubst - substitutes environment variables in shell format 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 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.

AUTHOR
       Written by Bruno Haible.

REPORTING BUGS
       Report bugs to <bug-gnu-gettextATgnu.org>.

COPYRIGHT
       Copyright   (C)  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 permit-
       ted 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)