I want to add paths to a CLASSPATH variable but if I use the :
setenv CLASSPATH /opt
all previous entries are erased. How do I append additional entries to a system variable without overwriting the original value.
Thanx (3 Replies)
Well first of all I am a real Unix newbie. I am taking a course on it in University. I kind of understand set and setenv but, I think it si something that I should really understand. So I thought that I would try a forum out and see how good you guys really are.
The question:
Execute the... (1 Reply)
I never undestood exactly what's the difference between the SET and SETENV commands.
One sets variables visible to all users and the other (SETENV) only to the specific user environment ?
Thanks in advance,
BraZil - thE heLL iS HEre :mad: !!! (2 Replies)
Is it possible to set environement variable in a script (for example, perl script) so that the variable will be set after exiting the script - in a father shell. (2 Replies)
Can anyone please explain what the difference is between these two commands
typeset - ?
export - i know with this even child process can read the variable
Declare - ?
i use bash shell
http://cnswww.cns.cwru.edu/~chet/bash/bashref.html#SEC58
states that
"
The typeset command is... (0 Replies)
I am having the following environment setup script.
$cat dbenv.sh
#! /bin/csh
#
set history=32
stty sane
setenv ORACLE_HOME=/dboracle/orabase/product/10.1.0.3
set ORACLE_BASE=/dboracle/orabase
set... (2 Replies)
helllo every body ..
hope you are having good time programming in unix .
here is a little problem faced me :
setenv("myvar","bla bla",1);
system("myvar=$(grep....));
printf("%s\n", getenv("myvar"));
will print :
bla bla ..
how can i get the value of grep into my program ? ... (7 Replies)
Hi Experts,
Need your help in understanding the commands to setup the environment variables in hp-ux.
Beleive need to use either set,setenv or export.
I am confused between above three options, when to use which option?
On command line, I have tried both set and setenv but couldn't... (7 Replies)
Discussion started by: userexperience
7 Replies
LEARN ABOUT SUNOS
setenv
setenv(3C) Standard C Library Functions setenv(3C)NAME
setenv - add or change environment variable
SYNOPSIS
#include <stdlib.h>
int setenv(const char *envname, const char *envval, int overwrite);
DESCRIPTION
The setenv() function updates or adds a variable in the environment of the calling process. The envname argument points to a string con-
taining the name of an environment variable to be added or altered. The environment variable is set to the value to which envval points.
The function fails if envname points to a string which contains an '=' character. If the environment variable named by envname already
exists and the value of overwrite is non-zero, the function returns successfully and the environment is updated. If the environment vari-
able named by envname already exists and the value of overwrite is zero, the function returns successfully and the environment remains
unchanged.
If the application modifies environ or the pointers to which it points, the behavior of setenv() is undefined. The setenv() function
updates the list of pointers to which environ points.
The strings described by envname and envval are copied by this function.
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned, errno set to indicate the error, and the environment is left
unchanged.
ERRORS
The setenv() function will fail if:
EINVAL The envname argument is a null pointer, points to an empty string, or points to a string containing an '=' character.
ENOMEM Insufficient memory was available to add a variable or its value to the environment.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO getenv(3C), unsetenv(3C), attributes(5), standards(5)SunOS 5.10 31 Mar 2002 setenv(3C)