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  corre-
       sponding  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 envi-
       ronment variables that are referenced in SHELL-FORMAT, one per line.

AUTHOR
       Written by Bruno Haible.

REPORTING BUGS
       Report bugs to <>.

COPYRIGHT
       Copyright (C) 2003-2004 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 0.14.1                 January 2004                               ENVSUBST(1)