12-01-2013
Quote:
Originally Posted by
Don Cragun
As long as you don't have input lines that contain both an ip address and an ip-like address between slash characters, the following seems to do what you want:
Thanks Don, that is a perfect solution. [No, they will never be on the same line.]
I should have been looking at the grep man page instead of scratching my head trying to work out a regex solution.
Thanks also for including "sort -u" didn't know about that and it saves a process. ["He who saves a process, saves the World", ummm, as a proverb it needs some work.]
Cheers.
---------- Post updated at 08:59 PM ---------- Previous update was at 08:56 PM ----------
Quote:
Originally Posted by
disedorgue
Hi,
Or, if your grep have -P option, you can reduct one regex:
In theory I have the -P Perl regex available, but the "unimplemented features" factor has bitten me more than once so I avoid using that.
Thanks anyway.
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LEARN ABOUT DEBIAN
re_comp
RE_COMP(3) Linux Programmer's Manual RE_COMP(3)
NAME
re_comp, re_exec - BSD regex functions
SYNOPSIS
#define _REGEX_RE_COMP
#include <sys/types.h>
#include <regex.h>
char *re_comp(char *regex);
int re_exec(char *string);
DESCRIPTION
re_comp() is used to compile the null-terminated regular expression pointed to by regex. The compiled pattern occupies a static area, the
pattern buffer, which is overwritten by subsequent use of re_comp(). If regex is NULL, no operation is performed and the pattern buffer's
contents are not altered.
re_exec() is used to assess whether the null-terminated string pointed to by string matches the previously compiled regex.
RETURN VALUE
re_comp() returns NULL on successful compilation of regex otherwise it returns a pointer to an appropriate error message.
re_exec() returns 1 for a successful match, zero for failure.
CONFORMING TO
4.3BSD.
NOTES
These functions are obsolete; the functions documented in regcomp(3) should be used instead.
SEE ALSO
regcomp(3), regex(7), GNU regex manual
COLOPHON
This page is part of release 3.44 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
1995-07-14 RE_COMP(3)