envsubst - substitutes environment variables in shell format strings
envsubst [OPTION] [SHELL-FORMAT]
ENVSUBST(1) User Commands 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 refer-
enced in SHELL-FORMAT are substituted; otherwise all environment vari-
ables 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 in the bug tracker at <https://savan-
nah.gnu.org/projects/gettext> or by email to <bug-gettext@gnu.org>.
COPYRIGHT
Copyright (C) 2003-2020 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later <https://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.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | text/gnu-gettext |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
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.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://ftp.gnu.org/gnu/gettext/get-
text-0.21.tar.xz.
Further information about this software can be found on the open source
community website at https://www.gnu.org/software/gettext.
GNU gettext-runtime 20200704
July 2020 ENVSUBST(1)