I'm trying to understand variable scopes in solaris10.
It is said that to display env variables we use 3 commands :
- env
- set
- export
What is the difference between them ?
thx for help.
---------- Post updated at 11:00 AM ---------- Previous update was at 10:50 AM ----------
I understand this :
To list all shell vars with their current values perform set cmd.
To make a value of variable known to a subshell export it using the export cmd.
QUESTIONS
---------------
Now I understand the difference between set and export cmds but don't understand the meaning of env command ?
What does it mean to make a value of variable known to a sub-shell ?
Hi,
I have inserted the following line in my local.login file
setenv ORACLE_HOME /u01/app/oracle/product/8.1.7
Then when I do an echo
$ echo $ORACLE_HOME
I get a blank line. Am I setting up ORACLE_HOME incorrectly?
Thanx (3 Replies)
Hi all,
I have seen it in all the .profile files and env file this
PATH=/usr/bin:/etc:/usr/sbin:/usr/ucb:$HOME/bin:/usr/bin/X11:/sbin:.
export PATH
What exactly does this Export path does??
Thanks
SUmeet (1 Reply)
hi i want to write a shell script to set environment variables . But i am not been able to set that for the current shell instead i have to spawn a new shell. Is there a way to set the env variable for the current shell using shell script in bash shell ?
Thnx (2 Replies)
Hi !
How to export ENV variables, which remains set for all the shell
Example :-
Login :myID
Pwd : **** -> Here my ID .profile is executed. Let say I set MYENV variable
Kisses% rlogin ABC -l XXXGroupID -> I login into a remote Solaris Server ABC
password : **** -> "XXXGroupID's... (1 Reply)
Hi,
I have a script that sets some env variables.
I want to source the script in a new xterm and
after the script execution is over, the xterm has to be alive with the env variables set according to the script.
I tried
xterm -e "source ./myscript;tcsh" &
The variables are getting set... (3 Replies)
Hello
whenenver i login to solaris server the prompt is displaying as #. i want to customize the promt with server name for all users.
how to customize the PS1 variable for all the users?.
Thanks for your help in advance.
regards,
Saravana (2 Replies)
I have a shell script I want to run that will set environment variables based on the value of an input variable submitted when the shell script is called. For example:
$ mgenv.sh prod
This would set environment variables for prod
$ mgenv.sh test
This would set environment variables... (1 Reply)
Hi,
I have two scripts say one.sh and two.sh.
I want one.sh to continuously export a variable in loop. and when two.sh starts then it should read the last value exported from one.sh.
file: one.sh
#! bin/sh
for i in `seq 1 1 4000000`; do
export VAR=$(($i**$i)) ;
done
file two.sh
... (2 Replies)
Hi,
I need to add file the /usr/lib under the command set. The /usr/lib need to be set under the DIRS=' ' while listing the set command.
I tried with the command below:
export PATH=${PATH}:/usr/bin
But this doesn't work out... (4 Replies)
Hi all
I am trying to create a script that takes a password input then writes that to a tmp file and puts that tmp file path in my env as a var.
It does everything but export the my env and I am unsure why.
I am using Ubuntu 12.4
#!/bin/bash
read -s -p "Enter Password: " gfpassword... (5 Replies)
Discussion started by: koikoi
5 Replies
LEARN ABOUT ULTRIX
setjmp
setjmp(3) Library Functions Manual setjmp(3)Name
setjmp, longjmp - non-local goto
Syntax
#include <setjmp.h>
int setjmp (env)
jmp_buf env;
void longjmp (env, val)
jmp_buf env;
int val;
Description
The and functions help deal with errors and interrupts encountered in a low-level subroutine of a program.
The function saves its stack environment in env (whose type, jmp_buf, is defined in the <setjmp.h> header file) for later use by It returns
the value 0.
The function restores the environment saved by the last call of with the corresponding env argument. After finishes, program execution
continues as if the corresponding call of (which must not itself have returned in the interim) had just returned the value val. The func-
tion cannot cause to return the value 0. If is invoked with a second argument of 0, returns 1. At the time of the second return from all
accessible data have values as of the time is called. However, global variables have the expected values. For example, those as of the
time of the
Examples
#include <setjmp.h>
jmp_buf env;
int i = 0;
main ()
{
void exit();
if(setjmp(env) != 0) {
(void) printf("value of i on 2nd return from setjmp: %d0, i);
exit(0);
}
(void) printf("value of i on 1st return from setjmp: %d0, i);
i = 1;
g();
/*NOTREACHED*/
}
g()
{
longjmp(env, 1);
/*NOTREACHED*/
}
If the a.out resulting from this C language code is run, the output is as follows:
value of i on 1st return from setjmp:0
value of i on 2nd return from setjmp:1
Unexpected behavior occurs if is called without a previous call to or when the last such call was in a function which has since returned.
Restrictions
The values of the registers on the second return from are register values at the time of the first call to not those of the Thus, variables
in a given function can produce unexpected results in the presence of depending on whether they are register or stack variables.
See Alsosignal(2).
RISC setjmp(3)