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Getting the lines that contains a '/' N times(N given at runtime)

 
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Operating Systems HP-UX Getting the lines that contains a '/' N times(N given at runtime)
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Old 08-06-2013
Getting the lines that contains a '/' N times(N given at runtime)
Hi all,

The task I have sounds easy enough but my solution seems too much complicated and I would like some ideas/feedback on how to achieve the same goal with a more elegant solution on HP-UX B.11.23 (a grep with a regexp would be nice, I did not manage to do a working one :/ )

Here is my problem, I have a list of dirname as input and I need to return only the ones that have the depth required (given at runtime)

How I have achieved this so far, please note that the "find . -type d" is just to give you a working example, input will be a flat file and nb_wanted will be set at runtime (here it is set to 2, +1 for the carriage return character):

Code:
find . -type d   | awk   -v nb_wanted=3 '{ whole_line=$0; cmd="echo \""$0"\" | sed \"s/[^\/]//g\" | wc -c " ; cmd|getline; nb_returned=$0; close(cmd); if (nb_returned==nb_wanted) print whole_line ; }'

This solution is pretty slow too :/ Any pointer to a more effective solution would be appreciated.

Matt
 
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LEARN ABOUT REDHAT

cptrfs

CPTRFS(l)								 )								 CPTRFS(l)

NAME

       CPTRFS  -  improve  the	computed  solution  to a system of linear equations when the coefficient matrix is Hermitian positive definite and
       tridiagonal, and provides error bounds and backward error estimates for the solution

SYNOPSIS

       SUBROUTINE CPTRFS( UPLO, N, NRHS, D, E, DF, EF, B, LDB, X, LDX, FERR, BERR, WORK, RWORK, INFO )

	   CHARACTER	  UPLO

	   INTEGER	  INFO, LDB, LDX, N, NRHS

	   REAL 	  BERR( * ), D( * ), DF( * ), FERR( * ), RWORK( * )

	   COMPLEX	  B( LDB, * ), E( * ), EF( * ), WORK( * ), X( LDX, * )

PURPOSE

       CPTRFS improves the computed solution to a system of linear equations when the coefficient matrix is Hermitian positive definite and tridi-
       agonal, and provides error bounds and backward error estimates for the solution.

ARGUMENTS

       UPLO    (input) CHARACTER*1
	       Specifies whether the superdiagonal or the subdiagonal of the tridiagonal matrix A is stored and the form of the factorization:
	       = 'U':  E is the superdiagonal of A, and A = U**H*D*U;
	       = 'L':  E is the subdiagonal of A, and A = L*D*L**H.  (The two forms are equivalent if A is real.)

       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 matrix B.  NRHS >= 0.

       D       (input) REAL array, dimension (N)
	       The n real diagonal elements of the tridiagonal matrix A.

       E       (input) COMPLEX array, dimension (N-1)
	       The (n-1) off-diagonal elements of the tridiagonal matrix A (see UPLO).

       DF      (input) REAL array, dimension (N)
	       The n diagonal elements of the diagonal matrix D from the factorization computed by CPTTRF.

       EF      (input) COMPLEX array, dimension (N-1)
	       The (n-1) off-diagonal elements of the unit bidiagonal factor U or L from the factorization computed by CPTTRF (see UPLO).

       B       (input) COMPLEX array, dimension (LDB,NRHS)
	       The right hand side matrix B.

       LDB     (input) INTEGER
	       The leading dimension of the array B.  LDB >= max(1,N).

       X       (input/output) COMPLEX array, dimension (LDX,NRHS)
	       On entry, the solution matrix X, as computed by CPTTRS.	On exit, the improved solution matrix X.

       LDX     (input) INTEGER
	       The leading dimension of the array X.  LDX >= max(1,N).

       FERR    (output) REAL 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) REAL 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) COMPLEX array, dimension (N)

       RWORK   (workspace) REAL array, dimension (N)

       INFO    (output) INTEGER
	       = 0:  successful exit
	       < 0:  if INFO = -i, the i-th argument had an illegal value

PARAMETERS

       ITMAX is the maximum number of steps of iterative refinement.

LAPACK version 3.0						   15 June 2000 							 CPTRFS(l)