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Top Forums Shell Programming and Scripting search a regular expression and match in two (or more files) using bash Post 302540466 by TheTransporter on Wednesday 20th of July 2011 04:56:43 PM
Old 07-20-2011
the thing is that, if the files are cat, then i lose information about where the entries previously were (file 1 or file 2).
So, I would like to have matches only between entries from A and B files.
Furthermore, I can see that the problem has another dimension, the entry after the _ is not unique. Therefore, an additional way is to match the string between tabs 7 and 8 of the line where the XXXXX_XXXXX is.
I think this should be matched first and then, when this is matched, refine the matches according to the _XXXXX. If entries are not matched, these should not be included in the output...
 

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FNMATCH(3)						     Linux Programmer's Manual							FNMATCH(3)

NAME
fnmatch - match filename or pathname SYNOPSIS
#include <fnmatch.h> int fnmatch(const char *pattern, const char *string, int flags); DESCRIPTION
The fnmatch() function checks whether the string argument matches the pattern argument, which is a shell wildcard pattern. The flags argument modifies the behaviour; it is the bitwise OR of zero or more of the following flags: FNM_NOESCAPE If this flag is set, treat backslash as an ordinary character, instead of an escape character. FNM_PATHNAME If this flag is set, match a slash in string only with a slash in pattern and not, for example, with a [] - sequence containing a slash. FNM_PERIOD If this flag is set, a leading period in string has to be matched exactly by a period in pattern. A period is considered to be leading if it is the first character in string, or if both FNM_PATHNAME is set and the period immediately follows a slash. FNM_FILE_NAME This is a GNU synonym for FNM_PATHNAME. FNM_LEADING_DIR If this flag (a GNU extension) is set, the pattern is considered to be matched if it matches an initial segment of string which is followed by a slash. This flag is mainly for the internal use of glibc and is only implemented in certain cases. FNM_CASEFOLD If this flag (a GNU extension) is set, the pattern is matched case-insensitively. RETURN VALUE
Zero if string matches pattern, FNM_NOMATCH if there is no match or another non-zero value if there is an error. CONFORMING TO
ISO/IEC 9945-2: 1993 (POSIX.2). The FNM_FILE_NAME, FNM_LEADING_DIR, and FNM_CASEFOLD flags are GNU extensions. SEE ALSO
sh(1), glob(3), scandir(3), glob(7) GNU
2000-10-15 FNMATCH(3)
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