By definition, grep, sort, and uniq work on text files; and the input your feeding to grep is not a line. (A line ends with a newline character and, including the newline character, contains no more than LINE_MAX bytes. On most systems, LINE_MAX is the minimum allowed by the standards, 2048.)
The standards also require operands to follow options on the command line. So, what you are doing is not portable and will not work at all on many systems.
On Linux systems, where the command you showed might work, it will take a lot longer than processing a normal text file because you require the entire (200Mb) file to be read into the address space of grep at once.
If the command line you showed works on your system, you may be able to get offsets in the file offsets (0-based rather than 1-based) of each match (rather than the number of occurrences of TR, Tr, tR, and tr) by using the command line:
This User Gave Thanks to Don Cragun For This Post:
Hi All,
I am pretty new to pattern matching and extraction using shell scripting. Could anyone please help me in extracting the word matching a pattern from a line in bash.
Input Sample (can vary between any of the 3 samples below):
1) Adaptec SCSI RAID 5445
2) Adaptec SCSI 5445S RAID
3)... (8 Replies)
I have a file with the below format,
GS*8*****
ST*1********
A*
B*
E*
RMR*123455(This is the unique number to locate this row)
F*
SE*1***
GE**
GS*9*****
ST*2
H*
J*
RMR*567889(This is the unique number to locate this row)
L*
SE*
GE***** (16 Replies)
I have a file a file having entries are like
@ram@sham@sita
@krishan@kumar
@deep@kumar@hello@sham
in this file all line are having different no of pattern-@.
need to fetch the substring after the last pattern.
like
sita
kumar
sham
thanks in advance (3 Replies)
Hi,
I have a string looks like the following:
USERS 32767.9844 UNDOTBS1 32767.9844 SYSAUX 32767.9844 SYSTEM 32767.9844 EMS 8192 EMS 8192 EMS_INDEXES 4096 EMS_INDEXES 4096 8 rows selected.
How do I extract a sub-string to get the expected output as following:
EMS 8192
EMS_INDEXES 4096
... (3 Replies)
I am facing a problem and I would be grateful if you can help me :wall:
I have a list of words like
And I have a datafile like
the box of
the box of tissues out of
of tissues out of
the book, the
the book, the pen and the
the pen and the
I want to find Patterns of “x.*x” where... (2 Replies)
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
The sample file:
dept1: user1,user2,user3
dept2: user4,user5,user6
dept3: user7,user8,user9
I want to match by '/^dept2.*/' but don't want to have substring 'dept2:' in output. How to compose such regex? (8 Replies)
Hi All,
My Problem is like below.
I have a file which contains just one row and contains data like
PO_CREATE12457888888888889SK1234567878744551111111111SK89456321145789955455555SK8888888815788852222
i want to extract SK12345678
SK89456321
SK88888888
So basically SK and next 8... (4 Replies)
Hi,
I know how to replace a string with another in a file.
But, i wish to replace the below string pattern
EncryptedPassword="{gafgfa}]\asffafsf312a" i.e EncryptedPassword="<any random string>"
To
EncryptedPassword=""
i.e remove the random password to a empty string.
Can you... (3 Replies)
Discussion started by: mohtashims
3 Replies
LEARN ABOUT OSX
tcl_stringmatch
Tcl_StringMatch(3) Tcl Library Procedures Tcl_StringMatch(3)__________________________________________________________________________________________________________________________________________________NAME
Tcl_StringMatch, Tcl_StringCaseMatch - test whether a string matches a pattern
SYNOPSIS
#include <tcl.h>
int
Tcl_StringMatch(str, pattern)
int
Tcl_StringCaseMatch(str, pattern, flags)
ARGUMENTS
const char *str (in) String to test.
const char *pattern (in) Pattern to match against string. May contain special characters from the set *?[].
int flags (in) OR-ed combination of match flags, currently only TCL_MATCH_NOCASE. 0 specifies a case-sensitive search.
_________________________________________________________________DESCRIPTION
This utility procedure determines whether a string matches a given pattern. If it does, then Tcl_StringMatch returns 1. Otherwise
Tcl_StringMatch returns 0. The algorithm used for matching is the same algorithm used in the string match Tcl command and is similar to
the algorithm used by the C-shell for file name matching; see the Tcl manual entry for details.
In Tcl_StringCaseMatch, the algorithm is the same, but you have the option to make the matching case-insensitive. If you choose this (by
passing TCL_MATCH_NOCASE), then the string and pattern are essentially matched in the lower case.
KEYWORDS
match, pattern, string
Tcl 8.5 Tcl_StringMatch(3)