08-01-2009
Regular Expressions as command line paramteters
Use and complete the template provided. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
We have to write a program that uses wget to get pages of a URL and search them for a pattern.
the command for the script should will look like this
> Look4Pattern URL E [L]
URL - url to search
E - string or regular expression to search for (10pts more for regular expression)
L - if not given then search only root level, otherwise recursively search L levels.
3. The attempts at a solution (include all code and scripts):
I have it working fine except when entering a regular expression, if the bar "|" is used, it is interpreted as a pipe instead of an argument, thus if I enter
Look4Pattern
Yahoo! grey|gray 1
I would get an error message
bash: gray: command not found
is there anyway to get around this other than make the user enter regular expressions in quotation marks?
4. School (University) and Course Number:
10 More Discussions You Might Find Interesting
1. Programming
How do I use the regular expressions in c++? (2 Replies)
Discussion started by: szzz
2 Replies
2. Shell Programming and Scripting
How can i create a regular expression which can detect a new line charcter followed by a special character say * and replace these both by a string of zero length?
Eg:
Input File san.txt
hello
hi ... (6 Replies)
Discussion started by: sandeep_hi
6 Replies
3. Shell Programming and Scripting
Hi,
can anyone advise me how to shorten this:
if || ; then
I tried but it dosent seem to work, whats the correct way.
Cheers (4 Replies)
Discussion started by: jack1981
4 Replies
4. UNIX for Advanced & Expert Users
Hi,
below is a piece of code written by my predecessor at work.
I'm kind of a newbie and am trying to figure out all the regular expressions in this piece of code.
It is really a tough time for me to figure out all the regular expressions.
Please shed some light on the regular expressions... (3 Replies)
Discussion started by: ramky79
3 Replies
5. Shell Programming and Scripting
Hi,
I have a file as below,
{####
if file
then
file
else
file
}
print file
i need to fine the count of all the pattern - file, inside the { }
i'm using a grep command as
grep -c \{'*file*'\} fake.sh\
It doesn't gives me any result, i think the problem here is the... (5 Replies)
Discussion started by: divak
5 Replies
6. Shell Programming and Scripting
need a regex that matches when a number has a zero (0) at the end of it
so like
10
20
120
30
330
1000
and so on (6 Replies)
Discussion started by: linuxkid
6 Replies
7. Homework & Coursework Questions
Hi,
I am newbie in shell programming and I need some help.
I had some data and I format it in a file like
dn: uid=aaaaa, dc=exmple, dc=com
cn: bbbb cccc
sn: cccc
telephoneNumber:+30-6543-123456
I have to extract the information aaaaa , bbbb, cccc and the phone number
using awk... (3 Replies)
Discussion started by: pro
3 Replies
8. Shell Programming and Scripting
Hi
Ilove unix and alwyas trying to to learn unix,but i am weak in using regular expressions.can you please give me a littel brief discription that how can i understand them and how to use .your response could lead a great hand in my unix love. (1 Reply)
Discussion started by: manoj attri
1 Replies
9. UNIX for Advanced & Expert Users
Hi All,
Can please let me know what is the difference between the single line mode and multi line mode in regular expresions?
Thanks,
Chidhambaram B (3 Replies)
Discussion started by: chidhu.anu
3 Replies
10. Shell Programming and Scripting
I need to pick a part of string lets stay started with specific character and end with specific character to replace using sed command
the line is like this:my audio book 71-skhdfon1dufgjhgf8.wav'
I want to move the characters beginning with - end before.
I have different files with random... (2 Replies)
Discussion started by: XP_2600
2 Replies
LEARN ABOUT REDHAT
ldap_url
LDAP_URL(3) Library Functions Manual LDAP_URL(3)
NAME
ldap_is_ldap_url, ldap_url_parse, ldap_free_urldesc, ldap_url_search, ldap_url_search_s, ldap_url_search_st - LDAP Uniform Resource Locator
routines
SYNOPSIS
#include <ldap.h>
int ldap_is_ldap_url( url )
char *url;
int ldap_url_parse( url, ludpp )
char *url;
LDAPURLDesc **ludpp;
typedef struct ldap_url_desc {
char * lud_scheme; /* URI scheme */
char lud_host; /* LDAP host to contact */
int lud_port; /* port on host */
char * lud_dn; /* base for search */
char ** lud_attrs; /* list of attributes */
int lud_scope; /* a LDAP_SCOPE_... value */
char * lud_filter; /* LDAP search filter */
char ** lud_exts; /* LDAP extensions */
/* may contain additional fields for internal use */
} LDAPURLDesc;
ldap_free_urldesc( ludp )
LDAPURLDesc *ludp;
int ldap_url_search( ld, url, attrsonly )
LDAP *ld;
char *url;
int attrsonly;
int ldap_url_search_s( ld, url, attrsonly, res )
LDAP *ld;
char *url;
int attrsonly;
LDAPMessage **res;
int ldap_url_search_st( ld, url, attrsonly, timeout, res )
LDAP *ld;
char *url;
int attrsonly;
struct timeval *timeout;
LDAPMessage **res;
DESCRIPTION
These routines support the use of LDAP URLs (Uniform Resource Locators) as detailed in RFC 2255. LDAP URLs look like this:
ldap://hostport/dn[?attrs[?scope[?filter[?exts]]]]
where:
hostport is a host name with an optional ":portnumber"
dn is the search base
attrs is a comma separated list of attributes to request
scope is one of these three strings:
base one sub (default=base)
filter is filter
exts are recognized set of LDAP and/or API extensions.
Example:
ldap://ldap.example.net/dc=example,dc=net?cn,sn?sub?(cn=*)
URLs that are wrapped in angle-brackets and/or preceded by "URL:" are also tolerated. Alternative schemes such as ldaps:// and ldapi://
may be parsed using the below routines as well.
ldap_is_ldap_url() returns a non-zero value if url looks like an LDAP URL (as opposed to some other kind of URL). It can be used as a
quick check for an LDAP URL; the ldap_url_parse() routine should be used if a more thorough check is needed.
ldap_url_parse() breaks down an LDAP URL passed in url into its component pieces. If successful, zero is returned, an LDAP URL description
is allocated, filled in, and ludpp is set to point to it. If an error occurs, a non-zero URL error code is returned.
ldap_free_urldesc() should be called to free an LDAP URL description that was obtained from a call to ldap_url_parse().
ldap_url_search() initiates an asynchronous LDAP search based on the contents of the url string. This routine acts just like
ldap_search(3) except that many search parameters are pulled out of the URL.
ldap_url_search_s() performs a synchronous LDAP search based on the contents of the url string. This routine acts just like
ldap_search_s(3) except that many search parameters are pulled out of the URL.
ldap_url_search_st() performs a synchronous LDAP URL search with a specified timeout. This routine acts just like ldap_search_st(3) except
that many search parameters are pulled out of the URL.
SEE ALSO
ldap(3), ldap_search(3)
The LDAP URL Format, RFC 2255, Tim Howes and Mark Smith, December 1997.
ACKNOWLEDGEMENTS
OpenLDAP is developed and maintained by The OpenLDAP Project (http://www.openldap.org/). OpenLDAP is derived from University of Michigan
LDAP 3.3 Release.
OpenLDAP 2.0.27-Release 17 October 2000 LDAP_URL(3)