02-02-2006
realigning data string
Dear Forum members,
I am simply trying to take a 'string' or 'text' line from
inside a file( ex. '01020408')and then trying to grab positions
5 and 6, followed by 2 and 3, and so on. Basically realigning
the text to another file or to a variable in Shell.
What is the simplest way to do this? Can I use
CUT (to multiple Var's), or CASE, PRINTF, AWK, ..... ? I am not an expert
obviously, so I do not have a solid understanding of
AWK and SED commands for example. I obviously need something
that parses a line. I can then put the parsed pieces into place
using variables,etc.
Could you please give me your advice and syntax if possible?
Thank you,
Hman
Last edited by hman; 02-02-2006 at 11:55 PM..
Reason: New thoughts on question
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LEARN ABOUT ULTRIX
re_exec
regex(3) Library Functions Manual regex(3)
Name
re_comp, re_exec - regular expression handler
Syntax
char *re_comp(s)
char *s;
re_exec(s)
char *s;
Description
The subroutine compiles a string into an internal form suitable for pattern matching. The subroutine checks the argument string against
the last string passed to
The subroutine returns 0 if the string s was compiled successfully; otherwise a string containing an error message is returned. If is
passed 0 or a null string, it returns without changing the currently compiled regular expression.
The subroutine returns 1 if the string s matches the last compiled regular expression, 0 if the string s failed to match the last compiled
regular expression, and -1 if the compiled regular expression was invalid (indicating an internal error).
The strings passed to both and may have trailing or embedded newline characters; they are terminated by nulls. The regular expressions
recognized are described in the manual entry for given the above difference.
Diagnostics
The subroutine returns -1 for an internal error.
The subroutine returns one of the following strings if an error occurs:
No previous regular expression
Regular expression too long
unmatched (
missing ]
too many () pairs
unmatched )
See Also
ed(1), ex(1), egrep(1), fgrep(1), grep(1)
regex(3)