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08-27-2007
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replacing a nul field with text
Ok here's my pickle. I have a file in which every line must be the same length. Each field within the line is a certain length. None of these can be changed. What I need to do is look at a specific field within this file, let's say it starts with character 30 and ends with 50. If this field is empty, I need it to be replaced with a bit of text.
An example. Note that field 3 below in the first line is blank. I need to make it look like line2. Also, it should ignore the line if there is anything at all in the field as in line 2 and 3. Code:
field1field2 field4 field1field2field3 field4 field1field2sometext field4 Any help would be appreciated as I'm horrible with sed. Last edited by DarkHound; 08-27-2007 at 09:41 AM.. Reason: Wanted to fix offsets, apparently the board [code] tags do not use monospaced fonts. |
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