ENVSUBST
#NAMENAME #SYNOPSISSYNOPSIS #DESCRIPTIONDESCRIPTION #AUTHORAUTHOR #REPORTING BUGSREPORTING BUGS #COPYRIGHTCOPYRIGHT #SEE ALSOSEE ALSO 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-gettext@gnu.org>.
COPYRIGHT
Copyright 2003-2005 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 envsubstprograms are properly installed at your site, the
command
info envsubst should give you access to the complete manual.
