envsubst(1) - phpMan

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  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 in the bug tracker at <https://savannah.gnu.org/projects/gettext> or by  email
       to <bug-gettext AT 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.

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 0.21                    March 2022                                ENVSUBST(1)

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