10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi guys,
I need a help with a query. Basically i want to know the difference between (0+01)* and ((0+01)*)* . It seems whatever string can be generated by the first RE can also be generated by second and they should essentially be same. Am i missing something? (1 Reply)
Discussion started by: srkmish
1 Replies
2. UNIX for Dummies Questions & Answers
Hello,
I'm trying to rename a bunch of files that were named incorrectly. I know a little about regular expressions but I'm not very good at them.
Here is the image of the file names:
http://i47.tinypic.com/np2gxi.jpg
I'm trying to change the 20111116 at the beginning to 20101116 for all... (2 Replies)
Discussion started by: nastyn8
2 Replies
3. Programming
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)
Discussion started by: jessy83
1 Replies
4. UNIX for Dummies Questions & Answers
I like to loop a list of files which named file1, file2, file3, file4, etc
if I like to loop them all over
for f in file1, file2, file3, file4
do
echo "processing" $f
done
how to use a regular expression to loop file$i instead?
Thank you. (4 Replies)
Discussion started by: ksgreen
4 Replies
5. Shell Programming and Scripting
Hey all! what matching expression might I use to match all characters included in \W, EXCEPT < and > ?
for example:
@tokens=split(/ ???? /,$string);
I've dubiously tried \W but this clips off the first letter of each "token", for some reason ... (2 Replies)
Discussion started by: applefat
2 Replies
6. UNIX for Dummies Questions & Answers
Folks;
I have 3 questions & any help with them would be really appreciated:
If i have a list of directories, for example:
/fs/pas/2007/4/6/2634210/admdat/examin
/fs/pas/2007/4/6/2634210/admdat2/stat
/fs/pas/2007/4/6/2634210/admdat3/data
/fs/pas/2007/4/6/2634210/im_2/0b.dcm
Now; my... (6 Replies)
Discussion started by: Katkota
6 Replies
7. UNIX for Dummies Questions & Answers
anyone knows what does this regular expression match for?
\(3,\).*\1.*\1 (1 Reply)
Discussion started by: metalwarrior
1 Replies
8. Shell Programming and Scripting
hi
i need to wipe out something from giving path i have some thing like that :
pwd | sed 's/.*foo//'
it is working fine when I have path like : /blah/balh1/foo/moo
so it erasing me all that comes before the foo including the foo
but I have problem when I have dir by the name of... (7 Replies)
Discussion started by: umen
7 Replies
9. UNIX for Dummies Questions & Answers
Hi - I am trying to ignore the following items from a list.
lp0
lp11
lp12
lp14
The following code works fine, but I was wondering if there was a tidier way to write the lp regular expression?
egrep -v "lp"
Thanks in advance. (3 Replies)
Discussion started by: Krispy
3 Replies
10. Shell Programming and Scripting
why does * highlight everything in it... shouldn't it only highlight capital letters? (0 Replies)
Discussion started by: brentdeback
0 Replies
RE_COMP(3) BSD Library Functions Manual RE_COMP(3)
NAME
re_comp, re_exec -- regular expression handler
LIBRARY
Compatibility Library (libcompat, -lcompat)
SYNOPSIS
#include <unistd.h>
char *
re_comp(const char *s);
int
re_exec(const char *s);
DESCRIPTION
This interface is made obsolete by regex(3).
The re_comp() function compiles a string into an internal form suitable for pattern matching. The re_exec() function checks the argument
string against the last string passed to re_comp().
The re_comp() function returns 0 if the string s was compiled successfully; otherwise a string containing an error message is returned. If
re_comp() is passed 0 or a null string, it returns without changing the currently compiled regular expression.
The re_exec() function 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 re_comp() and re_exec() may have trailing or embedded newline characters; they are terminated by NULs. The regu-
lar expressions recognized are described in the manual entry for ed(1), given the above difference.
DIAGNOSTICS
The re_exec() function returns -1 for an internal error.
The re_comp() function returns ``no previous regular expression'' or one of the strings generated by regerror(3).
SEE ALSO
ed(1), egrep(1), ex(1), fgrep(1), grep(1), regex(3)
HISTORY
The re_comp() and re_exec() functions appeared in 4.0BSD.
BSD
June 4, 1993 BSD