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'