07-26-2012
Quote:
Originally Posted by
FUTURE_EINSTEIN
Sorry I don't know why bur it does not working
ls: /tmp/?[0-9]*: No such file or directory
Show us the entire script. That behavior would only occur if the argument to ls is quoted or if pathname expansion is disabled (very unlikely).
Quote:
Originally Posted by
FUTURE_EINSTEIN
Thanks for the explanation but why "second character is any non-digit" I wanted digit instead I mean I have read that ^ means opposite but I thought it should mean opposite if it is inside []. So, you want to say that even though the it is inside single quote it means not????
It has nothing to do with
^. It has to do with
*, which means to allow zero or more matches of the preceding character (in this case, any digit,
[[:digit:]]). It's the zero part that's important. If the second character is not a digit, that's equivalent to zero digits. If there is no second character at all, that's also equivalent to zero digits (which is why your pattern matches a filename of just 1 character).
Regards,
Alister
This User Gave Thanks to alister For This Post:
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LEARN ABOUT CENTOS
iswdigit
ISWDIGIT(3) Linux Programmer's Manual ISWDIGIT(3)
NAME
iswdigit - test for decimal digit wide character
SYNOPSIS
#include <wctype.h>
int iswdigit(wint_t wc);
DESCRIPTION
The iswdigit() function is the wide-character equivalent of the isdigit(3) function. It tests whether wc is a wide character belonging to
the wide-character class "digit".
The wide-character class "digit" is a subclass of the wide-character class "xdigit", and therefore also a subclass of the wide-character
class "alnum", of the wide-character class "graph" and of the wide-character class "print".
Being a subclass of the wide character class "print", the wide-character class "digit" is disjoint from the wide-character class "cntrl".
Being a subclass of the wide-character class "graph", the wide-character class "digit" is disjoint from the wide-character class "space"
and its subclass "blank".
Being a subclass of the wide-character class "alnum", the wide-character class "digit" is disjoint from the wide-character class "punct".
The wide-character class "digit" is disjoint from the wide-character class "alpha" and therefore also disjoint from its subclasses "lower",
"upper".
The wide-character class "digit" always contains exactly the digits '0' to '9'.
RETURN VALUE
The iswdigit() function returns nonzero if wc is a wide character belonging to the wide-character class "digit". Otherwise it returns
zero.
CONFORMING TO
C99.
NOTES
The behavior of iswdigit() depends on the LC_CTYPE category of the current locale.
SEE ALSO
isdigit(3), iswctype(3)
COLOPHON
This page is part of release 3.53 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/.
GNU
1999-07-25 ISWDIGIT(3)