z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

env
Exit Values
Portability
v NLSPATH
Related Information
env, sh
See Appendix F for more information.
0 Successful completion
1 Failure due to any of the following:
v Not enough memory
v Name is too long
2 Incorrect command-line argument
126 env found command but could not invoke it
127 env was unable to find command
POSIX.2, X/Open Portability Guide, UNIX System V.
printenv on Berkeley UNIX systems works like env.
eval — Construct a command by concatenating arguments
Format
Description
Examples
eval [argument ...]
tcsh shell: eval argument ...
The shell evaluates each argument as it would for any command. eval then
concatenates the resulting strings, separated by spaces, and evaluates and
executes this string in the current shell environment.
eval in the tcsh shell
In the tcsh shell, eval treats the arguments as input to the shell and executes the
resulting commands in the context of the current shell. This is usually used to
execute commands generated as the result of command or variable substitution,
since parsing occurs before these substitutions. See “tcsh — Invoke a C shell” on
page 626.
The command:
for a in 1 2 3
do
eval x$a=fred
done
sets variables x1, x2, and x3 to fred. Then:
echo $x1 $x2 $x3
258 z/OS V1R9.0 UNIX System Services Command Reference