I know regular expressions can be used, but am not able to find the right one. Also are there any built-in functions available that do this?
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I know regular expressions can be used, but am not able to find the right one. Also are there any built-in functions available that do this?
Given:
This regex will pull the pathname:
It looks for a white space character followed by a slash followed by anything. If you don’t have white space in your path names, then you can use the more restrictive:
If you’re sure you’ll always have one or more path components to the names, you can add more restrictions:
And so it goes on. The more you know about what can be valid in the path, the better your chances of matching only the file name. But note that a file name on Unix can contain any character except
/(because it is the delimiter between sections of the path name) and\0, the NUL byte. Everything else – newlines, tabs, controls, etc – is fair game and could be part of a file name. Mercifully, most of them usually aren’t present in file names.Note that relative pathnames are even harder than absolute path names.