03-01-2013
Pls use code tags as required by forum rules!
a) Protect you script from modifications by either permissions or by shell mechanisnms. You do not mention what shell you are using; e.g. bash provides sth like !(pattern-list) when extended pattern matching is ON by setting the extglob option.
b) Eliminate the two ' from ';' in the middle of your line.
Last edited by RudiC; 03-01-2013 at 06:24 AM..
Reason: correction of typo in script
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FDIM(3) Linux Programmer's Manual FDIM(3)
NAME
fdim, fdimf, fdiml - positive difference
SYNOPSIS
#include <math.h>
double fdim(double x, double y);
float fdimf(float x, float y);
long double fdiml(long double x, long double y);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
fdimf(), fdiml(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99
DESCRIPTION
These functions return the positive difference, max(x-y,0), between their arguments.
RETURN VALUE
On success, these functions return the positive difference.
If x or y is a NaN, a NaN is returned.
If the result overflows, a range error occurs, and the functions return HUGE_VAL, HUGE_VALF, or HUGE_VALL, respectively.
ERRORS
See math_error(7) for information on how to determine whether an error has occurred when calling these functions.
The following errors can occur:
Range error: result overflow
An overflow floating-point exception (FE_OVERFLOW) is raised.
These functions do not set errno.
VERSIONS
These functions first appeared in glibc in version 2.1.
CONFORMING TO
C99, POSIX.1-2001.
SEE ALSO
fmax(3)
COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
2008-08-11 FDIM(3)