ENV(1) User Commands ENV(1)

NAME

env - set environment for command invocation

SYNOPSIS

/usr/bin/env [-i | -] [name=value]... [utility [arg... ]]


/usr/xpg4/bin/env [-i | -] [name=value]...
[utility [arg... ]]

DESCRIPTION

The env utility obtains the current environment, modifies it according to
its arguments, then invokes the utility named by the utility operand with
the modified environment.


Optional arguments are passed to utility. If no utility operand is
specified, the resulting environment is written to the standard output,
with one name=value pair per line.


If env executes commands with arguments, it uses the default shell
/usr/bin/sh (see sh(1)).

OPTIONS

The following options are supported:

-i | -
Ignores the environment that would otherwise be inherited
from the current shell. Restricts the environment for
utility to that specified by the arguments.

OPERANDS

The following operands are supported:

name=value
Arguments of the form name=value modify the execution
environment, and are placed into the inherited environment
before utility is invoked.


utility
The name of the utility to be invoked. If utility names
any of the special shell built-in utilities, the results
are undefined.


arg
A string to pass as an argument for the invoked utility.

EXAMPLES

Example 1: Invoking utilities with new PATH values

The following utility:


example% env -i PATH=/mybin mygrep xyz myfile


invokes the utility mygrep with a new PATH value as the only entry in its
environment. In this case, PATH is used to locate mygrep, which then must
reside in /mybin.

ENVIRONMENT VARIABLES

See environ(7) for descriptions of the following environment variables
that affect the execution of env: LANG, LC_ALL, LC_CTYPE, LC_MESSAGES,
and NLSPATH.

PATH
Determine the location of the utility. If PATH is specified as a
name=value operand to env, the value given shall be used in the
search for utility.

EXIT STATUS

If utility is invoked, the exit status of env is the exit status of
utility. Otherwise, the env utility returns one of the following exit
values:

0
Successful completion.


1-125
An error occurred.


126
utility was found but could not be invoked.


127
utility could not be found.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

/usr/bin


+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|CSI | enabled |
+---------------+-----------------+

/usr/xpg4/bin


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|CSI | enabled |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+

SEE ALSO

ksh(1), sh(1), exec(2), profile(5), attributes(7), environ(7),
standards(7)

January 2, 2002 ENV(1)