NAME

       env - run a program in a modified environment

SYNOPSIS

       env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]

DESCRIPTION

       Set each NAME to VALUE in the environment and run COMMAND.

       Mandatory arguments to long options are mandatory for short options too.

       -i, --ignore-environment
              start with an empty environment

       -0, --null
              end each output line with NUL, not newline

       -u, --unset=NAME
              remove variable from the environment

       -C, --chdir=DIR
              change working directory to DIR

       -S, --split-string=S
              process and split S into separate arguments; used to pass multiple arguments on shebang lines

       --block-signal[=SIG]
              block delivery of SIG signal(s) to COMMAND

       --default-signal[=SIG]
              reset handling of SIG signal(s) to the default

       --ignore-signal[=SIG]
              set handling of SIG signal(s) to do nothing

       --list-signal-handling
              list non default signal handling to stderr

       -v, --debug
              print verbose information for each processing step

       --help display this help and exit

       --version
              output version information and exit

       A mere - implies -i.  If no COMMAND, print the resulting environment.

       SIG  may  be a signal name like 'PIPE', or a signal number like '13'.  Without SIG, all known signals are
       included.  Multiple signals can be comma-separated.  An empty SIG argument is a no-op.

   Exit status:
       125    if the env command itself fails

       126    if COMMAND is found but cannot be invoked

       127    if COMMAND cannot be found

       -      the exit status of COMMAND otherwise

OPTIONS

   -S/--split-string usage in scripts
       The -S option allows specifying multiple parameters in a script.  Running a script named 1.pl  containing
       the following first line:

              #!/usr/bin/env -S perl -w -T
              ...

       Will execute perl -w -T 1.pl .

       Without the '-S' parameter the script will likely fail with:

              /usr/bin/env: 'perl -w -T': No such file or directory

       See the full documentation for more details.

   --default-signal[=SIG] usage
       This  option  allows  setting  a  signal  handler  to its default action, which is not possible using the
       traditional shell trap command.  The following example ensures that seq will be terminated by SIGPIPE  no
       matter how this signal is being handled in the process invoking the command.

              sh -c 'env --default-signal=PIPE seq inf | head -n1'

NOTES

       POSIX's exec(3p) pages says:
              "many existing applications wrongly assume that they start with certain signals set to the default
              action and/or unblocked.... Therefore, it is best not to block  or  ignore  signals  across  execs
              without  explicit  reason  to do so, and especially not to block signals across execs of arbitrary
              (not closely cooperating) programs."

AUTHOR

       Written by Richard Mlynarik, David MacKenzie, and Assaf Gordon.

REPORTING BUGS

       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT

       Copyright  ©  2023  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

       sigaction(2), sigprocmask(2), signal(7)

       Full documentation <https://www.gnu.org/software/coreutils/env>
       or available locally via: info '(coreutils) env invocation'