I have actually noticed two small issues with the suggeted script;
1. an empty lien in the input file will be removed in the output file
2. the more serious issue is that any line that has teh pattern "123" will be completely removed. Example:
got removed in the output file, while it shouldn't.
How can I change teh condition /"(-*[0-9.]+)"/ to also include the " ="?
You aren't giving us enough information:
1. When lines that don't match the format of the lines you said your input file contained in your first message appear, are they just supposed to be copied to the output?
2. If one of these lines appears appears after a line like "name" = "1";and before an associated line like "2" = "";, what is supposed to happen?
3. Will there ever be lines with more than one <equals-sign> character? If so, what is supposed to be done with them?
4. Will there ever be lines with one <equals-sign> character that is not in one of the two forms specified in your first message? If so, what is supposed to be done with them?
I am using GnuWin32 sed and am having trouble with the regexp - i.e., they don't behave the same way as in UNIX (POSIX and and all that). I have a stream of data, e.g.:
11111'222?'22'33?'333'44444'55555'
I want to insert a \n after those apostrophes that are *not* preceded by a ?.
... (2 Replies)
please help:
I want to add 1 space between string and numbers:
input file:
abcd12345
output file:
abcd 1234
The following sed command does not work:
sed 's/\(+\)\(+\)/\1 \2/' file
Any ideas, please
Andy (2 Replies)
Basically it should identify what ever is in between /*< >*/ (tags) and replace dbname ending with (.) with the words in between the tags
i.e.
DELETE FROM /*<workDB>*/epd_test./*<multi>*//*<version>*/epd_tbl1 ALL; into
DELETE FROM... (4 Replies)
Hi all,
I have one question regarding sed regexp (or any regexp in general),
I have some path like this
C:/Abc/def/ghi/jkl in a file file1
Now if i use following code
cat file1 | sed 's#\(.*\)/.*#\1#'
Now it give me following output
C:/Abc/def/ghi, which is fine
But i just... (2 Replies)
Hi,
I am not that good with reg exp and sed. But I was just looking at something the other day and came across a situation.
When I ran the below command:
echo "123 word" | sed 's/*/(&)/'
the op was:
(123) word
But when I ran:
echo "123 word" | sed 's/*/(&)/g'
the o/p was:
(123)... (4 Replies)
Dear all
i have the code which print 1 line of context before and after regexp, with line number
sed -n -e '/regexp/{=;x;1!p;g;$!N;p;D;}' -e h
the code work well but any one can tell me what each letter mean {=;x;1!p;g;$!N;p;D;}
also how i can print 2 line before and onle line after ... (2 Replies)
Hi!
I have a file with multiple lines following this format:
<a href="xxx.aaa_bbb_ccc.yyy">xxx.aaa_bbb_ccc.yyy</a>
The goal is to replace the title (not modifying the href) so the new lines looks like this:
<a href="xxx.aaa_bbb_ccc.yyy">Aaa bbb ccc</a>
The number of underscores in the... (2 Replies)
Dealing with Linux servers
script would be in korn or bash shell syntax
file is /etc/fstab
I want to insert something if regex is matched to all matched lines in the /etc/fstab file and print out entire /etc/fstab file with the changes
example
58.228.111.111:/my/file/system... (5 Replies)
G'day,
Here's a teaser for a sed guru, which I surely am not one, as even my
basic sed skills are rusted from years of not practising ... lol
Ok ... we have a string of digits such as:
632413741610252847552619172459483022433027602515212950543016701812771409213148672112
we want it split... (9 Replies)
OFF 00280456 - 2014|1|2020_STATUS|GROUP_NAME|SUBGROUP_NAME|CLASS_NAME|GROUP_ID|SUBGROUP_ID
I have above header in file. I need to replace 2020_STATUS with STATUS.
2020_STATUS is not always same but the column name will have STATUS all of the time. For instance column name might be 2019_STATUS... (1 Reply)
Discussion started by: jmadhams
1 Replies
LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)