man pages section 1: User Commands

envsubst (1)

Name

envsubst - substitutes environment variables in shell format strings

Synopsis

envsubst [OPTION] [SHELL-FORMAT]

Description

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)