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Full Discussion: #!/usr/bin/env : perl no such file or directory
Top Forums UNIX for Advanced & Expert Users #!/usr/bin/env : perl no such file or directory Post 302366775 by radoulov on Friday 30th of October 2009 10:07:26 AM
Old 10-30-2009
Quote:
Originally Posted by sylwesterr
[...]
1. why one would use env tool to launch perl instead of launching perl directly?
You could need to call it that way when you don't have control over the owner of the apache process and/or
you want to use the same configuration file on more non identical systems.

Quote:
2. how to modify the env's output?
If the above is not true just modify the environment of the owner of the apache process and point directly to the desired Perl interpreter.

You will use /usr/bin/env ... when you are not sure where exactly the needed executable is located, but you're sure it can be found somewhere in the environment.
 

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LEARN ABOUT OPENDARWIN

env

ENV(1)							    BSD General Commands Manual 						    ENV(1)

NAME

     env -- set and print environment

SYNOPSIS

     env [-i] [name=value ...] [utility [argument ...]]

DESCRIPTION

     env executes utility after modifying the environment as specified on the command line.  The option name=value specifies an environmental
     variable, name, with a value of value.  The option '-i' causes env to completely ignore the environment it inherits.

     If no utility is specified, env prints out the names and values of the variables in the environment, with one name=value pair per line.

DIAGNOSTICS

     If the utility is invoked, the exit status of env shall be the exit status of utility; otherwise, the env utility exits with one of the fol-
     lowing values:

     0	     The env utility completed successfully

     1-125   An error occurred in the env utility.

     126     The utility specified by utility was found, but could not be invoked.

     127     The utility specified by utility could not be found.

COMPATIBILITY

     The historic - option has been deprecated but is still supported in this implementation.

SEE ALSO

     execvp(3), environ(7)

STANDARDS

     The env utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').

BUGS

     env doesn't handle commands with equal (``='') signs in their names, for obvious reasons.

BSD
								  August 27, 1993							       BSD
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