I advise against dynamically-generated variable names in general, it's usually cleaner to use arrays, but they do have some uses for things like parsing configuration files.
The safest way to set an arbitrary variable name is read. This should work in most Bourne shells.
Hi all,
I'm having problems with the setting a variable in a nested if statement. It doesn't seem to change even if it mets the 'if' condition.
My script essentially looks for a user name from the output from a kerberos command.
When I find the user name, I tried to change a variable and exit... (6 Replies)
HI Gurus,
I had a requirement where i want to allocate a file name into a variable and get the file name in the subj of email.
Suppose i have a file File002.pdx in the folder /home/pcs/system/files/File002.pdx
Iam using a variable a = `ls /home/pcs/system/files/*.pdx`
Iam using *... (2 Replies)
#!/bin/sh
APP_ROOT_MODE1=/opt/app1.0
APP_ROOT_MODE2=/opt/app2.0
APP_ROOT=${APP_ROOT_${APP_MODE}}
# enviornment variable APP_MODE will be exported in the terminal where
# we run the applciation, its value is string - MODE1 or MODE2
# My intension is:
# when export APP_MODE=MODE1... (4 Replies)
i wrote a tiny version of tail command using a large buffer statically allocated but, in a second time, i found another version in which i use a bidimensional array dynamically allocated.
here is the first version
/*my tiny tail, it prints the last 5 line of a file
*/
#include<stdio.h>... (4 Replies)
I have a question about nested double quotes. Any help is appreciated.
Here are my commands on Mac OS.
# string="Ethernet \"USB Ethernet\" \"Bluetooth DUN\" AirPort FireWire \"Bluetooth PAN\""
# echo $string
Ethernet "USB Ethernet" "Bluetooth DUN" AirPort FireWire "Bluetooth PAN"
#... (3 Replies)
Hi Experts
I need some help in static memory allocation in C. I have a program in which I declared 2 variables, one char array and one integer. I was little surprised to see the addresses of the variables.
First:
int x;
char a;
printf("%u %u\n', &x, a);
I got the addresses displayed... (2 Replies)
Hi,
I want to parse nested variable in my script.
for exp-
c=1
G1='0318'
G2='0023'
G3='3092'
G4='0014'
while ;do
g=G$c
a=$g
echo "Group=$g and value=$a"
c=`expr $c + 1`
done
final output are as -
---------------------------
Group=G1 and... (4 Replies)
Hi guys!
Could you tell me what's this figure about? (See the attached figure below.)
This is a representation of block allocation filesystem and extent allocation filesystem in Solaris.
Does this mean that in a block-based allocation, data are placed in individual blocks while in... (0 Replies)
hello all..
i'm a beginner in shell scripting. I need to know what is really happening when we are creating a variable in shell scripting? how memory is allocated for that variable? (3 Replies)
Hi Gurus,
I have a command to assign value based on input value.
current condition is "if pattern matches "case", then assign "HOLD" else "SUCC"right now, I need to add one more condition (variable name is VAR).
the condition is "if pattern1 matches "case", then assign "HOLD" else if... (2 Replies)
Discussion started by: ken6503
2 Replies
LEARN ABOUT OPENDARWIN
set
set(n) Tcl Built-In Commands set(n)
__________________________________________________________________________________________________________________________________________________NAME
set - Read and write variables
SYNOPSIS
set varName ?value?
_________________________________________________________________DESCRIPTION
Returns the value of variable varName. If value is specified, then set the value of varName to value, creating a new variable if one
doesn't already exist, and return its value. If varName contains an open parenthesis and ends with a close parenthesis, then it refers to
an array element: the characters before the first open parenthesis are the name of the array, and the characters between the parentheses
are the index within the array. Otherwise varName refers to a scalar variable. Normally, varName is unqualified (does not include the
names of any containing namespaces), and the variable of that name in the current namespace is read or written. If varName includes names-
pace qualifiers (in the array name if it refers to an array element), the variable in the specified namespace is read or written.
If no procedure is active, then varName refers to a namespace variable (global variable if the current namespace is the global namespace).
If a procedure is active, then varName refers to a parameter or local variable of the procedure unless the global command was invoked to
declare varName to be global, or unless a variable command was invoked to declare varName to be a namespace variable.
SEE ALSO
expr(n), proc(n), trace(n), unset(n)
KEYWORDS
read, write, variable
Tcl set(n)