That's two backspaces, with a space between them. I don't think you can print a delete and get anything sensible. I can't see your computer from here, please post your code.
I meant I would print "\b \b", but I just want to give the user the option of deleting characters with backspace or delete.
So I was messing around with implementing backspace and also reading it into into an array today and think I've got it working fairly well. Correct me if I'm wrong, but getchar() turns the input into a unique integer right? Well I want to display the password that was entered just to check, but if everything has been converted into integers, how do I display it?
And I'll narrow my earlier question changing the colors into something that is answerable. Basically I want to do something along these lines:
I guess this is kinda similar to my first question, this time comparing something that has been turned into an integer to an input. I commented on the lines I am referring to.
Is it possible for a internal LAN to mask a IP e.g. i have a server ip running the intranet ip being 192.168.0.8 and i want to make that like www.intranet.com is this possible on a internal network ? (1 Reply)
Hello,
I need to know that whether a content of a string can be hidden or masked inside a shell script.
My Sample Code is given below
<Code>
#!/usr/bin/ksh
Userid=test
DB=temp
Passwd=`java Decryption test`
# The Above command will get the encryped password for "test" user id and store... (2 Replies)
I have a pipe delimited file that I need to 'mask' to before loading to keep some data confidential. I need to maintain the first 4 bytes of certain columns and replace the remaining bytes with an 'x'. I would like to maintain spaces but it's not a requirement.
Example, need to mask columns 2... (2 Replies)
Hi,
I currently have a UNIX script with a function that uses a username and password to connect to the database, retrieve some information and then exit.
At the moment, am getting the username and password from a hidden plain text file and permission set to -r--------, i.e. read only to who... (1 Reply)
Hi I am facing an issue with the below script which has the below line
each field being separated with a tab.
I need to mask the 8 and 7th field based on following conditions
1. 8th field is 16 in length and is numerics
i will mask the middle 6 digits except the first 6 and last 4.
input... (2 Replies)
Is there a way to mask the password inside of a script to minimize the impact of a comprimised server? So
ssh -o "PasswordAuthentication no" -o "HostbasedAuthentication yes" -l testuser 192.168.3.1 "mysqldump --opt --all-databases -u root -pPassword| gzip" > $backup_dir/mysqldump.gz
a... (2 Replies)
I have a requirement of masking few specific fields in the UNIX file. The details are as following-
File is fixed length file with each record of 250 charater length.
2 fields needs to be masked – the positions are 21:30 and 110:120
The character by character making needs to be done which... (5 Replies)
My file "test.dat" data as below
Requirement is to mask(replace) all english characters with "X" EXCEPT first 7 characters of every line.
my command
awk '{gsub("]","X")}1' test.dat
looks not working properly, Appreciate any suggestion... (6 Replies)
Discussion started by: JSKOBS
6 Replies
LEARN ABOUT REDHAT
dptsvx
DPTSVX(l) ) DPTSVX(l)
NAME
DPTSVX - use the factorization A = L*D*L**T to compute the solution to a real system of linear equations A*X = B, where A is an N-by-N sym-
metric positive definite tridiagonal matrix and X and B are N-by-NRHS matrices
SYNOPSIS
SUBROUTINE DPTSVX( FACT, N, NRHS, D, E, DF, EF, B, LDB, X, LDX, RCOND, FERR, BERR, WORK, INFO )
CHARACTER FACT
INTEGER INFO, LDB, LDX, N, NRHS
DOUBLE PRECISION RCOND
DOUBLE PRECISION B( LDB, * ), BERR( * ), D( * ), DF( * ), E( * ), EF( * ), FERR( * ), WORK( * ), X( LDX, * )
PURPOSE
DPTSVX uses the factorization A = L*D*L**T to compute the solution to a real system of linear equations A*X = B, where A is an N-by-N sym-
metric positive definite tridiagonal matrix and X and B are N-by-NRHS matrices. Error bounds on the solution and a condition estimate are
also provided.
DESCRIPTION
The following steps are performed:
1. If FACT = 'N', the matrix A is factored as A = L*D*L**T, where L
is a unit lower bidiagonal matrix and D is diagonal. The
factorization can also be regarded as having the form
A = U**T*D*U.
2. If the leading i-by-i principal minor is not positive definite,
then the routine returns with INFO = i. Otherwise, the factored
form of A is used to estimate the condition number of the matrix
A. If the reciprocal of the condition number is less than machine
precision, INFO = N+1 is returned as a warning, but the routine
still goes on to solve for X and compute error bounds as
described below.
3. The system of equations is solved for X using the factored form
of A.
4. Iterative refinement is applied to improve the computed solution
matrix and calculate error bounds and backward error estimates
for it.
ARGUMENTS
FACT (input) CHARACTER*1
Specifies whether or not the factored form of A has been supplied on entry. = 'F': On entry, DF and EF contain the factored form
of A. D, E, DF, and EF will not be modified. = 'N': The matrix A will be copied to DF and EF and factored.
N (input) INTEGER
The order of the matrix A. N >= 0.
NRHS (input) INTEGER
The number of right hand sides, i.e., the number of columns of the matrices B and X. NRHS >= 0.
D (input) DOUBLE PRECISION array, dimension (N)
The n diagonal elements of the tridiagonal matrix A.
E (input) DOUBLE PRECISION array, dimension (N-1)
The (n-1) subdiagonal elements of the tridiagonal matrix A.
DF (input or output) DOUBLE PRECISION array, dimension (N)
If FACT = 'F', then DF is an input argument and on entry contains the n diagonal elements of the diagonal matrix D from the
L*D*L**T factorization of A. If FACT = 'N', then DF is an output argument and on exit contains the n diagonal elements of the
diagonal matrix D from the L*D*L**T factorization of A.
EF (input or output) DOUBLE PRECISION array, dimension (N-1)
If FACT = 'F', then EF is an input argument and on entry contains the (n-1) subdiagonal elements of the unit bidiagonal factor L
from the L*D*L**T factorization of A. If FACT = 'N', then EF is an output argument and on exit contains the (n-1) subdiagonal ele-
ments of the unit bidiagonal factor L from the L*D*L**T factorization of A.
B (input) DOUBLE PRECISION array, dimension (LDB,NRHS)
The N-by-NRHS right hand side matrix B.
LDB (input) INTEGER
The leading dimension of the array B. LDB >= max(1,N).
X (output) DOUBLE PRECISION array, dimension (LDX,NRHS)
If INFO = 0 of INFO = N+1, the N-by-NRHS solution matrix X.
LDX (input) INTEGER
The leading dimension of the array X. LDX >= max(1,N).
RCOND (output) DOUBLE PRECISION
The reciprocal condition number of the matrix A. If RCOND is less than the machine precision (in particular, if RCOND = 0), the
matrix is singular to working precision. This condition is indicated by a return code of INFO > 0.
FERR (output) DOUBLE PRECISION array, dimension (NRHS)
The forward error bound for each solution vector X(j) (the j-th column of the solution matrix X). If XTRUE is the true solution
corresponding to X(j), FERR(j) is an estimated upper bound for the magnitude of the largest element in (X(j) - XTRUE) divided by
the magnitude of the largest element in X(j).
BERR (output) DOUBLE PRECISION array, dimension (NRHS)
The componentwise relative backward error of each solution vector X(j) (i.e., the smallest relative change in any element of A or B
that makes X(j) an exact solution).
WORK (workspace) DOUBLE PRECISION array, dimension (2*N)
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, and i is
<= N: the leading minor of order i of A is not positive definite, so the factorization could not be completed, and the solution
has not been computed. RCOND = 0 is returned. = N+1: U is nonsingular, but RCOND is less than machine precision, meaning that the
matrix is singular to working precision. Nevertheless, the solution and error bounds are computed because there are a number of
situations where the computed solution can be more accurate than the value of RCOND would suggest.
LAPACK version 3.0 15 June 2000 DPTSVX(l)