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-FOR- MAT, one per line.

AUTHOR Written by Bruno Haible.

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

COPYRIGHT 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.

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)