SED and it used with | and grep Post: 47052

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OK, I am trying to become more familiar with grep and sed. I have a file that is storing some records. I am allowing a user to search for a keyword in the file with this: grep -i "$keyword" testFile|sed -n -e 's/^/\ /' -e 's/:/\ /gp' ...

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hello everybody! I have a html file which is not properly formatted meaning that the whole content is in one line. I want to to cut out certain parts of that file. Those parts are between ' #" ' and ' " ' and always start with ' sec_ ' and after the ' sec_ ' any number of characters and ' _...

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HI all, i have a line in a file it contains Code: one;two_1_10;two_2_10;two_3_10;three~ now i need to get the output as Code: one;two_1_abc_10;two_2_abc_10;two_3_abc_10;three~ ( 1 should be replaced with 1_abc for two__abc_10 , and one more thing the number of occurances of...

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I am stranded with a problem. Please solve. How will you remove blank lines from a file using sed and grep? ( blank line contains nothing or only white spaces). I run the below commands of sed and grep but grep isn't giving output as desired. Why? sed '/^*$/d' blank grep -v "^*$" blank...

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Hi, I have a file with reoccurring patterns and I want extract the 3rd line after the match, then delete another pattern from that third line. For example the file is in the following format: Hello Name: Abc Number: 123 Hello Name: FQE Number: 543 This occurs more than 100...

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Hello Everyone! I'm kind of new to parsing and would like extract a partial part of my nmap scan output so I can convert it to csv/excel: My current file has two types of lines like this: Nmap scan report for dns1 (1.1.1.1) Nmap scan report for dns2 (2.2.2.2) Nmap scan report for 3.3.3.3 ...

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Hi , I have a file where i have modifed certain things compared to original file . The difference of the original file and modified file is as follows. # diff mir_lex.c.modified mir_lex.c.orig 3209c3209 < if(yy_current_buffer -> yy_is_our_buffer == 0) { --- >...

LEARN ABOUT PLAN9

lex

LEX(1)							      General Commands Manual							    LEX(1)

NAME

       lex - generator of lexical analysis programs

SYNOPSIS

       lex [ -tvn ] [ file ...	]

DESCRIPTION

       Lex generates programs to be used in simple lexical analysis of text.  The input files (standard input default) contain regular expressions
       to be searched for and actions written in C to be executed when expressions are found.

       A C source program, lex.yy.c is generated.  This program, when run, copies unrecognized portions of the input to the output,  and  executes
       the associated C action for each regular expression that is recognized.

       The options have the following meanings.

       -t     Place the result on the standard output instead of in file lex.yy.c.

       -v     Print a one-line summary of statistics of the generated analyzer.

       -n     Opposite of -v; -n is default.

EXAMPLES

       This program converts upper case to lower, removes blanks at the end of lines, and replaces multiple blanks by single blanks.

       %%
       [A-Z]	 putchar(yytext[0]+'a'-'A');
       [ ]+$
       [ ]+ putchar(' ');

FILES

       lex.yy.c
	      output

       /sys/lib/lex/ncform
	      template

SEE ALSO

       yacc(1), sed(1)
       M. E. Lesk and E. Schmidt, `LEX--Lexical Analyzer Generator', Unix Research System Programmer's Manual, Tenth Edition, Volume 2.

SOURCE

       /sys/src/cmd/lex

BUGS

       Cannot handle UTF.
       The asteroid to kill this dinosaur is still in orbit.

																	    LEX(1)

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LEARN ABOUT PLAN9

lex