You probably confuse "regexps" with "shell regexps" (aka "file globs"). "Regexp" is what commands like sed, awk, grep, etc. use. The shell (and hence "find" uses only "file globs", which are a lot simpler and less sophisticated.
What you can do is to use "find" to pre-sort the files you are interested in and then filter this output through "grep" or a similar tool using regexps, for instance:
Note the difference between "*\.c" (file glob, read by shell) and the regexp grep works with.
You can also use "find" with an "-exec" clause to send every file name to a regexp-capable program. "Find" will use the return value (=error level) of that program to determine if it should be included in the result set (=printed) or not. This probably will result in a lot more overhead because the external program is called for every single filename instead of once for the pipeline in the above example.
I hope this helps.
bakunin
PS: As you seem to be a bit unsure about the syntax of "find" you might want to read this article where i explained it in some detail.
Hi,
I want to find the files available in a directory /var/user/*/*/data/.
I tried using the command "find /var/user/ -path '*/*/data/ -name '*' -type f" it says find: 0652-017 -path is not a valid option and then i tried using "find /var/user/ -name '*/*/data/*' -type f" but its not... (3 Replies)
I am trying to test to see if the hostname of the computer I'm on starts with ne1dxdb - it can contain any characters after that. I have the following code, but it's not working - it's not falling into the if statement. Any ideas?
boxname="unknown"
function get_hosttype {
... (4 Replies)
I suspect this is commonly done, but haven't found the right combination of search terms to find the answer.
I want to grep for lines in .cpp files that contain only 1 '=' sign in an if statement. e.g.,
if (a = b) -- find this
if (a==b) -- don't find this
My attempt:
egrep... (7 Replies)
I'm trying to math all class references in a C++ file using grep with regular expression. I'm trying to know if a specific include is usuless or not, so I have to know if there is a refence in cpp.
I wrote this RE that searches for a reference from class ABCZ, but unfortunately it isn't working... (0 Replies)
Hi,
in the cobol copy books is there any regular expressions to be used in awk to fetch the length of each columns?
below mentioned are the examples.
Copy Book Sample
01 tablename.
02 group header.
03 col1 s9(10)V99.
03 Col2 s9(10)V9(3).
03 Col3 XXXX
02... (7 Replies)
Hello everyone,
first post here, trying to learn scripting on my own and this forum as been really helpful so far. I made few little scripts working great but I m facing some problems with RE.
I have a bunch of files in many subdirectories called *001.ext *002.ext OR simple *.ext or *01.ext... (7 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)
Hi all
I have a list of file names in array. But this file names are not exact. so i want to search whether a file exists or not using regular expression.
code snippet:
if ;
then
echo "File exists"
else
echo "File does not exits"
fi
over here "*EQST*" should be treated as a regular... (4 Replies)
Hi Gurus,
I need to identify the file with below format:
ABC20110101.DAT
ABCD2011010103.DAT
If I use ABC*\.DAT, it get two file. I want to get file after "ABC' then number, the ".DAT".
I tried
ABC* but it doesn't work.
Thanks in advance. (9 Replies)
I have files:
sum_<INPUT FILENAME>.YYYYMMDDhhmmss.csv
and
sum_details_<INPUT FILENAME>.YYYYMMDDhhmmss.csv
I have no idea, what is input filename, but in the code I would like to catch them in case
I process them in the loop above case statement
for *.${Today}.*.txt... (3 Replies)
Discussion started by: digioleg54
3 Replies
LEARN ABOUT MINIX
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 5.10 12 Jul 1999 regex(1F)