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-FOR-
       MAT, one per line.

AUTHOR

       Written by Bruno Haible.

REPORTING BUGS

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

COPYRIGHT

       Copyright (C) 2003-2006 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is
       NO  warranty;  not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE.

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 0.16.1       November 2006                     ENVSUBST(1)