09-05-2012
You have yourself a shell script there. The best thing for evaluating a shell script is usually a shell.
Then you can just echo all the variables back out.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have a program that displays many messages on stdout.
I have another file that contain error messages only - Each line is a separate message. (msgs.txt)
I am trying to show only the errors and not all the output.
I tried this but got nothing:
myprog | grep < msgs.txt
I also tried... (2 Replies)
Discussion started by: GMMike
2 Replies
2. Shell Programming and Scripting
Hi,
Could someone please help me with how to do the following?
Say I have a flat file test.lst and the content of the file is:
Report Date - `date '+%m%d%Y'`
I'm trying the following
while read myLine
do
echo ${myLine}
done<test.lst
This prints Report Date - `date... (1 Reply)
Discussion started by: arunsoman80
1 Replies
3. Shell Programming and Scripting
I have variables:
FOO="Text"
BAR="FOO"
I'd like to be able to evaluate the variable named as the value of $BAR.
echo $FOO
Text
echo $BAR
FOO
This is what I'd like to do:
echo ${$BAR} (this won't work)
Text (3 Replies)
Discussion started by: Ilja
3 Replies
4. UNIX for Dummies Questions & Answers
I have a file with approximately 262,000 fields and I want to split it according to pairs of fields. The fields have headers and I want to create smaller files with just the columns between the fields (specified fields inclusive).
For example, I just want the columns "set" and "test", with the... (3 Replies)
Discussion started by: etownbetty
3 Replies
5. Shell Programming and Scripting
Attached is the exact ouput of a vmware VDR log file I am working with but what I am trying to achieve is as follows:
I need to output sections of the file using the string "Normal backup" as the start and "Duration" as the end to seperate files so I can then manipulate them further to create... (2 Replies)
Discussion started by: jelloir
2 Replies
6. Shell Programming and Scripting
How to evaluate the value of a variable ?
For example:
a=var
$a=value !!!error happens!!!
I want to evaluate var=value, how to realize it?
Thanks!
---------- Post updated at 03:37 AM ---------- Previous update was at 02:22 AM ----------
I am using linux bash.
a=var
$a=value... (4 Replies)
Discussion started by: 915086731
4 Replies
7. UNIX for Dummies Questions & Answers
Hi all,
I have a flat file as below;
470423495|1||TSA-A000073800||1|||1
471423495|1||TSA-A000073800||5|||5
472423495|1||TSA-A000073800||2|||7
473423495|1||TSA-A000073800||3|||3
I like to create a Unix script.
The script have to valuate the last two columns, if the values are... (4 Replies)
Discussion started by: mrreds
4 Replies
8. Shell Programming and Scripting
Hello guys,
I'm trying to extract all the expressions between the following tags: <b></b> from a HTML file.
This is how it looks: big lines containing several dozens expressions (made of 1,2,3,4,6 or even 7 words) I would like to extract:
<b>bla ble</b>bla ble</td><tr valign="top"><td... (3 Replies)
Discussion started by: bobylapointe
3 Replies
9. UNIX for Dummies Questions & Answers
In BASH, how does ||: get interpreted. I know || is logical or. And I believe : evaluates to true. Can someone give a thorough explanation for this usage?
Example
for i in $IGGY
do
&& skipdb=1 || : (6 Replies)
Discussion started by: glev2005
6 Replies
10. Shell Programming and Scripting
Hi
I have been trying to figure a way to copy a file, (a template), that has internal variables. Using the values as defined for those variables in another script.
So a file called x -
#! /bin/bash
D=aa.$X.bb
And file y
#! /bin/bash
X=6
while read line
do
eval echo... (5 Replies)
Discussion started by: steadyonabix
5 Replies
LEARN ABOUT CENTOS
tcl_exprdouble
Tcl_ExprLong(3) Tcl Library Procedures Tcl_ExprLong(3)
__________________________________________________________________________________________________________________________________________________
NAME
Tcl_ExprLong, Tcl_ExprDouble, Tcl_ExprBoolean, Tcl_ExprString - evaluate an expression
SYNOPSIS
#include <tcl.h>
int
Tcl_ExprLong(interp, expr, longPtr)
int
Tcl_ExprDouble(interp, expr, doublePtr)
int
Tcl_ExprBoolean(interp, expr, booleanPtr)
int
Tcl_ExprString(interp, expr)
ARGUMENTS
Tcl_Interp *interp (in) Interpreter in whose context to evaluate expr.
const char *expr (in) Expression to be evaluated.
long *longPtr (out) Pointer to location in which to store the integer value of the expression.
int *doublePtr (out) Pointer to location in which to store the floating-point value of the expression.
int *booleanPtr (out) Pointer to location in which to store the 0/1 boolean value of the expression.
_________________________________________________________________
DESCRIPTION
These four procedures all evaluate the expression given by the expr argument and return the result in one of four different forms. The
expression can have any of the forms accepted by the expr command. Note that these procedures have been largely replaced by the object-
based procedures Tcl_ExprLongObj, Tcl_ExprDoubleObj, Tcl_ExprBooleanObj, and Tcl_ExprObj. Those object-based procedures evaluate an
expression held in a Tcl object instead of a string. The object argument can retain an internal representation that is more efficient to
execute.
The interp argument refers to an interpreter used to evaluate the expression (e.g. for variables and nested Tcl commands) and to return
error information.
For all of these procedures the return value is a standard Tcl result: TCL_OK means the expression was successfully evaluated, and
TCL_ERROR means that an error occurred while evaluating the expression. If TCL_ERROR is returned then the interpreter's result will hold a
message describing the error. If an error occurs while executing a Tcl command embedded in the expression then that error will be
returned.
If the expression is successfully evaluated, then its value is returned in one of four forms, depending on which procedure is invoked.
Tcl_ExprLong stores an integer value at *longPtr. If the expression's actual value is a floating-point number, then it is truncated to an
integer. If the expression's actual value is a non-numeric string then an error is returned.
Tcl_ExprDouble stores a floating-point value at *doublePtr. If the expression's actual value is an integer, it is converted to floating-
point. If the expression's actual value is a non-numeric string then an error is returned.
Tcl_ExprBoolean stores a 0/1 integer value at *booleanPtr. If the expression's actual value is an integer or floating-point number, then
they store 0 at *booleanPtr if the value was zero and 1 otherwise. If the expression's actual value is a non-numeric string then it must
be one of the values accepted by Tcl_GetBoolean such as "yes" or "no", or else an error occurs.
Tcl_ExprString returns the value of the expression as a string stored in the interpreter's result.
SEE ALSO
Tcl_ExprLongObj, Tcl_ExprDoubleObj, Tcl_ExprBooleanObj, Tcl_ExprObj
KEYWORDS
boolean, double, evaluate, expression, integer, object, string
Tcl 7.0 Tcl_ExprLong(3)