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)
