Is it possible to combine a regular expression with a aritmetical expression? For example, taking a 8-numbers caracter sequece and casting each output of a grep, comparing to a constant.
THX! (2 Replies)
I have a file with data that looks like -
record nullable { final_delim=end ,delim="~%%~" ,quote=none }
(
1_UPC:string;
2_QUANTITY:string;
)
I want to fetch the first column that starts with integer. e.g - 1_UPC, 2_QUANTITY.
I tried "awk -F ":" -v var1="^0-9" '$1==var1' inschemafile".... (2 Replies)
Hello, All.
please help me with this problem.
i need to use variable as regular expression.
some thing like this:
BEGIN {
RS="\n";
ORS="\n";
reg_exp = ".+Dec.+";
# i mean that regular expression is any symbol before "Dec" and any symbol after it. For example <Worksheet... (6 Replies)
I've a file
$ cat size
1234
5678
vamsi
I want to match the lines which has just 4 digits and nothing else.
So
$ cat size | nawk ' $0 ~ // {print}'
1234
5678
But when I use the repetition clause it doesn't work
cat size | nawk ' $0 ~ /{4}/ {print}'
I actually want to filter out the... (8 Replies)
Hi FolksI want to write a nawk script that dynamically creates variable numbers of regular expressions on the fly rather than using constants. Is this possible?They would need to be used within an if statement within the nawk program: - if ( "my string of regex's" ) Thanks (7 Replies)
CA_RELEASE has a value of 6. I need to check if that this is a numeric value. if not error.
source $CA_VERSION_DATA
if * ]
then
echo "CA_RELESE $CA_RELEASE is invalid"
exit -1
fi
+ source /etc/ncgl/ca_version_data
++ CA_PRODUCT_ID=samxts
++ CA_RELEASE=6
++ CA_WEEK_NO=7
++... (3 Replies)
Hi all,
How am I read a file, find the match regular expression and overwrite to the same files.
open DESTINATION_FILE, "<tmptravl.dat" or die "tmptravl.dat";
open NEW_DESTINATION_FILE, ">new_tmptravl.dat" or die "new_tmptravl.dat";
while (<DESTINATION_FILE>)
{
# print... (1 Reply)
Hello All,
I'm trying to extract the lines between two consecutive elements of an array from a file.
My array looks like:
problem_arr=(PRS111 PRS213 PRS234)
j=0
while } ]
do
k=`expr $j + 1`
sed -n "/${problem_arr}/,/${problem_arr}/p" problemid.txt
---some operation goes... (11 Replies)
I am trying to test if I can replace a regular expression in 'nawk' with a variable.
Please let me know why it is not working. I am using ksh88i on solaris8
I am trying use this test as a building block to filter active external DNS connections.
Ideally I want to pass variable defined... (4 Replies)
Discussion started by: kchinnam
4 Replies
LEARN ABOUT ULTRIX
regex
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 Alsoed(1), ex(1), egrep(1), fgrep(1), grep(1)regex(3)