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Shell Programming and Scripting
sed and regular expressions problem
Post 302285115 by hjalle on Saturday 7th of February 2009 09:56:28 AM
02-07-2009
sed and regular expressions problem
Hi
Im trying to use sed to change some files which I'll describe here:
I want to use a regular expression to grab the <body> tag from a document. However, the <body> tag can look different so the regular expression used will take care of that and "include" all types of bodies, in example: <body background="green" > will also be replaced. However, that text that goes directly after body, in this case ' background="green" ' needs to be included in the output.
"s/<body[^>]*>/<body(I want the trimmed content here)>CONTENT/g"
So basically the question is how (and if its possible) to add that content to the output line?
<body background="green" > should become <body background="green" >CONTENT
and
<body> should become <body>CONTENT
If you don't understand what I mean, just ask me and I'll try to describe it in another way
Thank you!
Im trying to use sed to change some files which I'll describe here:
I want to use a regular expression to grab the <body> tag from a document. However, the <body> tag can look different so the regular expression used will take care of that and "include" all types of bodies, in example: <body background="green" > will also be replaced. However, that text that goes directly after body, in this case ' background="green" ' needs to be included in the output.
"s/<body[^>]*>/<body(I want the trimmed content here)>CONTENT/g"
So basically the question is how (and if its possible) to add that content to the output line?
<body background="green" > should become <body background="green" >CONTENT
and
<body> should become <body>CONTENT
If you don't understand what I mean, just ask me and I'll try to describe it in another way
Thank you!
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LEARN ABOUT PLAN9
regexp
REGEXP(6) Games Manual REGEXP(6) NAME
regexp - regular expression notation DESCRIPTION
A regular expression specifies a set of strings of characters. A member of this set of strings is said to be matched by the regular expression. In many applications a delimiter character, commonly bounds a regular expression. In the following specification for regular expressions the word `character' means any character (rune) but newline. The syntax for a regular expression e0 is e3: literal | charclass | '.' | '^' | '$' | '(' e0 ')' e2: e3 | e2 REP REP: '*' | '+' | '?' e1: e2 | e1 e2 e0: e1 | e0 '|' e1 A literal is any non-metacharacter, or a metacharacter (one of .*+?[]()|^$), or the delimiter preceded by A charclass is a nonempty string s bracketed [s] (or [^s]); it matches any character in (or not in) s. A negated character class never matches newline. A substring a-b, with a and b in ascending order, stands for the inclusive range of characters between a and b. In s, the metacharacters an initial and the regular expression delimiter must be preceded by a other metacharacters have no special meaning and may appear unescaped. A matches any character. A matches the beginning of a line; matches the end of the line. The REP operators match zero or more (*), one or more (+), zero or one (?), instances respectively of the preceding regular expression e2. A concatenated regular expression, e1e2, matches a match to e1 followed by a match to e2. An alternative regular expression, e0|e1, matches either a match to e0 or a match to e1. A match to any part of a regular expression extends as far as possible without preventing a match to the remainder of the regular expres- sion. SEE ALSO
awk(1), ed(1), sam(1), sed(1), regexp(2) REGEXP(6)