Hi,
How does the PATH and MANPATH environment variable get set?
I want to add "/opt/SUNWspro/bin" to the search path for all the users. Where can I access this variable.
I know in my home directory, depend on which shell I use, there are files such as .profile and .cshrc which I can edit to... (3 Replies)
Hi.....
I'm kind of new to c programming in Unix...need help here.
Supposed to write a source code to support Path environment variable for my programming assignment for Spring semester.
but i'm kind of stuck. Could anyone out there assist me?
prompt> /bin/ls
My program could output... (3 Replies)
whats the meaning of ::
colon in PATH environment?
/usr/local/bin:/usr/bin:/usr/local/gnu/bin::.:/usr/local/bin:/usr/bin:/usr/local/gnu/bin:/usr/local/bin
and whats the meaning of // in PATH ? (1 Reply)
hi all
i have joined new to the group.
i have set an variable in my bashrc file.
.bashrc
PROGHOME=/home/braf/braf/prog
export PROGHOME
but while using it in my shell script its path is not taken and i had to explicitly give the export command to set the path.
in my script... (8 Replies)
Hi,
Could anyone help me in writing a single line code by either using (sed, awk, perl or whatever) to extract a specific path from the PATH environment variable?
for eg: suppose the PATH is being set as follows
PATH=/usr/bin/:/usr/local/bin:/bin:/usr/sbin:/usr/bin/java:/usr/bin/perl3.4
... (2 Replies)
Hello Folks,
I want to append a path in user's PATH variable which should be available in current session.
Background
Numerous persons will run a utility.
Aim is to add the absolute path of the utility the first time it runs so that next runs have the PATH in env & users can directly run... (6 Replies)
Hi I'm trying to select text between two lines, I'm using sed to to this, but I need to pass variables to it. For example
start="BEGIN /home/mavkoup/data"
end="END"
sed -n -e '/${start}/,/${end}/g' doesn't work. I've tried double quotes as well. I think there's a problem with the / in the... (4 Replies)
PATH is an environment variable.
When I open a terminal say terminal 1 and set some path in PATH variable it gets set which I can see using ech $PATH.
But when I open a new terminal say terminal 2 and fire echo $PATH why cannot I see the same output as seen in terminal terminal 1?
Why the path... (4 Replies)
Hello,
From the URL
https://www.unix.com/shell-programming-scripting/121303-remove-path-path-environment-variable-2.html
I got a function to remove the directories from a path. but looks like this isnt quite working.. i am also not able to post the comments in the thread as it is closed.
... (6 Replies)
Discussion started by: satishkumar432
6 Replies
LEARN ABOUT OSX
env5.12
Env(3pm) Perl Programmers Reference Guide Env(3pm)NAME
Env - perl module that imports environment variables as scalars or arrays
SYNOPSIS
use Env;
use Env qw(PATH HOME TERM);
use Env qw($SHELL @LD_LIBRARY_PATH);
DESCRIPTION
Perl maintains environment variables in a special hash named %ENV. For when this access method is inconvenient, the Perl module "Env"
allows environment variables to be treated as scalar or array variables.
The "Env::import()" function ties environment variables with suitable names to global Perl variables with the same names. By default it
ties all existing environment variables ("keys %ENV") to scalars. If the "import" function receives arguments, it takes them to be a list
of variables to tie; it's okay if they don't yet exist. The scalar type prefix '$' is inferred for any element of this list not prefixed by
'$' or '@'. Arrays are implemented in terms of "split" and "join", using $Config::Config{path_sep} as the delimiter.
After an environment variable is tied, merely use it like a normal variable. You may access its value
@path = split(/:/, $PATH);
print join("
", @LD_LIBRARY_PATH), "
";
or modify it
$PATH .= ":.";
push @LD_LIBRARY_PATH, $dir;
however you'd like. Bear in mind, however, that each access to a tied array variable requires splitting the environment variable's string
anew.
The code:
use Env qw(@PATH);
push @PATH, '.';
is equivalent to:
use Env qw(PATH);
$PATH .= ":.";
except that if $ENV{PATH} started out empty, the second approach leaves it with the (odd) value "":."", but the first approach leaves it
with ""."".
To remove a tied environment variable from the environment, assign it the undefined value
undef $PATH;
undef @LD_LIBRARY_PATH;
LIMITATIONS
On VMS systems, arrays tied to environment variables are read-only. Attempting to change anything will cause a warning.
AUTHOR
Chip Salzenberg <chip@fin.uucp> and Gregor N. Purdy <gregor@focusresearch.com>
perl v5.12.5 2012-11-03 Env(3pm)