Anything will match the empty string; regular expressions look for a match anywhere, and finding "nothing" anywhere trivially matches. You need to anchor it to make it more picky about what to find. $7 ~ /^$/ checks for an empty string (beginning of string adjacent to end of string) but it's probably more efficient to simply use equivalence comparison against the empty string.
guys forget the find command coz with find command u can't get condational output like grep. I will give small example :-
Apr 10 09:12 aacbl222_12aug1998.lqc
Apr 10 09:12 sscbl4534_4sep2001.lqc
Apr 10 09:12 ah66fmi_5jan1997.lqc
Apr 10 09:12 y313h1_7sep1998.lqc
May 11 09:12... (5 Replies)
Hi Friends,
Can any of you explain me about the below line of code?
mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`
Im not able to understand, what exactly it is doing :confused:
Any help would be useful for me.
Lokesha (4 Replies)
Hi,
I don't know hot to make this command work:
ls -laR | grep "^-" | awk '{print $9}'| grep "$.txt"
It should return the list of file .txt
It's important to search .txt at the end of the line, becouse some file name have "txt" in their name but have other extensions (13 Replies)
Hi all,
grep '\~' b | awk '{print $1","$3}' | sed -e 's/~//g'
Iam using above command for some report...
can this be done using any one of them either sed or awk or grep... (3 Replies)
Hi all,
can any one suggest me the script to grep multiple strings from ps -ef
pls correct the below script . its not working/
i want to print OK if all the below process are running in my solaris system. else i want to print NOT OK.
bash-3.00$ ps -ef | grep blu
lscpusr 48 42 ... (11 Replies)
Hello.
Following recommendations for one of my threads, this is working perfectly :
#!/bin/bash
CNT=$( grep -c -e "some text 1" -e "some text 2" -e "some text 3" "/tmp/log_file.txt" )
Now I need a grep success for some thing like :
#!/bin/bash
CNT=$( grep -c -e "some text_1... (4 Replies)
I've been working on this for 2 days and I'm not getting far. It is time to turn to you guys.
With the data below, I am trying to create a file that looks like this: I'd like to use some form of egrep I think.
AY#box#P04prod_to_contingency s AY#cmd#P04dump_cont_db s AY#cmd#P04get_on_ice_job s... (2 Replies)
All
I have a requirement to search and pick the data as below. Explained with example.
38999|4812 Highway 52 North|Rockville|55901|0196
67541|2800 Dexter Road|Northville|38999|0196
This is pipe separate data. First column represents dealer id and 4th column represents the zip code where... (4 Replies)
Hi
Is it possible to get the below code working.?
cmd="grep 'Name:' |awk -F' ' '{print $2}'|xargs -i basename {}"
echo $cmd
(
rman target / <<EOF1
LIST COPY ;
exit
EOF1
) | `$cmd`
in nutshell I want to be able to preset cmd as depending on script flow it can be... (2 Replies)
I have a content.xls file as given below,
NC_020815.1 1891831 1894692 virb4_A0A0H2X8Z4_ 1 954 1945
NC_020815.1 1883937 1886123 vird4_A0A0P9KA26_ 1 729 1379
NC_020815.1 2976151 2974985 virb10_H8FLU5_Ba 1 393 478
NC_020815.1 2968797 2967745 virb6_A0A0Q5GCZ4 5 398 499... (2 Replies)
Discussion started by: dineshkumarsrk
2 Replies
LEARN ABOUT OPENSOLARIS
regex
regex(1F) FMLI Commands regex(1F)NAME
regex - match patterns against a string
SYNOPSIS
regex [-e] [-v "string"] [pattern template] ...
pattern [template]
DESCRIPTION
The regex command takes a string from the standard input, and a list of pattern / template pairs, and runs regex() to compare the string
against each pattern until there is a match. When a match occurs, regex writes the corresponding template to the standard output and
returns TRUE. The last (or only) pattern does not need a template. If that is the pattern that matches the string, the function simply
returns TRUE. If no match is found, regex returns FALSE.
The argument pattern is a regular expression of the form described in regex(). In most cases, pattern should be enclosed in single quotes
to turn off special meanings of characters. Note that only the final pattern in the list may lack a template.
The argument template may contain the strings $m0 through $m9, which will be expanded to the part of pattern enclosed in ( ... )$0 through
( ... )$9 constructs (see examples below). Note that if you use this feature, you must be sure to enclose template in single quotes so that
FMLI does not expand $m0 through $m9 at parse time. This feature gives regex much of the power of cut(1), paste(1), and grep(1), and some
of the capabilities of sed(1). If there is no template, the default is $m0$m1$m2$m3$m4$m5$m6$m7$m8$m9.
OPTIONS
The following options are supported:
-e Evaluates the corresponding template and writes the result to the standard output.
-v "string" Uses string instead of the standard input to match against patterns.
EXAMPLES
Example 1 Cutting letters out of a string
To cut the 4th through 8th letters out of a string (this example will output strin and return TRUE):
`regex -v "my string is nice" '^.{3}(.{5})$0' '$m0'`
Example 2 Validating input in a form
In a form, to validate input to field 5 as an integer:
valid=`regex -v "$F5" '^[0-9]+$'`
Example 3 Translating an environment variable in a form
In a form, to translate an environment variable which contains one of the numbers 1, 2, 3, 4, 5 to the letters a, b, c, d, e:
value=`regex -v "$VAR1" 1 a 2 b 3 c 4 d 5 e '.*' 'Error'`
Note the use of the pattern '.*' to mean "anything else".
Example 4 Using backquoted expressions
In the example below, all three lines constitute a single backquoted expression. This expression, by itself, could be put in a menu defini-
tion file. Since backquoted expressions are expanded as they are parsed, and output from a backquoted expression (the cat command, in this
example) becomes part of the definition file being parsed, this expression would read /etc/passwd and make a dynamic menu of all the login
ids on the system.
`cat /etc/passwd | regex '^([^:]*)$0.*$' '
name=$m0
action=`message "$m0 is a user"`'`
DIAGNOSTICS
If none of the patterns match, regex returns FALSE, otherwise TRUE.
NOTES
Patterns and templates must often be enclosed in single quotes to turn off the special meanings of characters. Especially if you use the
$m0 through $m9 variables in the template, since FMLI will expand the variables (usually to "") before regex even sees them.
Single characters in character classes (inside []) must be listed before character ranges, otherwise they will not be recognized. For exam-
ple, [a-zA-Z_/] will not find underscores (_) or slashes (/), but [_/a-zA-Z] will.
The regular expressions accepted by regcmp differ slightly from other utilities (that is, sed, grep, awk, ed, and so forth).
regex with the -e option forces subsequent commands to be ignored. In other words, if a backquoted statement appears as follows:
`regex -e ...; command1; command2`
command1 and command2 would never be executed. However, dividing the expression into two:
`regex -e ...``command1; command2`
would yield the desired result.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO awk(1), cut(1), grep(1), paste(1), sed(1), regcmp(3C), attributes(5)SunOS 5.11 12 Jul 1999 regex(1F)