Shell globs: Difference between revisions
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Globs, is associated with certain kinds of 'match this pattern'. | Globs, is associated with certain kinds of 'match this pattern'. | ||
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If you have both a fnmatch and glob function: | If you have both a fnmatch and glob function: | ||
* {{search|fnmatch()}} is a "matches a single given string with this pattern" | * {{search|C fnmatch|fnmatch()}} is a "matches a single given string with this pattern" | ||
:: (probably nothing related to the filesystem unless you do it yourself) | :: (probably nothing related to the filesystem unless you do it yourself) | ||
* glob() is likely to | * {{search|C glob|glob()}} is likely to read directory entries from your filesystem and returns ''all'' matching filenames | ||
:: apparently fnmatch() is ''used'' in the glob() implementation | :: apparently fnmatch() is ''used'' in the glob() implementation | ||
Latest revision as of 00:32, 21 April 2024
Globs, is associated with certain kinds of 'match this pattern'.
- also called shell globs, because they are mainly seen in command lines
Compare with regular expressions, which are more powerful (but still single-string) ways of expressing patterns.
Shell globs match fairly simple patterns. you can only use:
- ? meaning one character of anything, and
- * meaning any amount of characters of anything
- ...anything except the directory separateor, / {{(or presumably \ if imitated in windows)}}
- [chars] meaning any one of the characters in this set
- can also be used to match a literal ? or *
- [!chars] meaning anything other than the characters in this set
- I've seen [^chars] manage the same, though this isn't quite standard [1]
If you have both a fnmatch and glob function:
- fnmatch() is a "matches a single given string with this pattern"
- (probably nothing related to the filesystem unless you do it yourself)
- glob() is likely to read directory entries from your filesystem and returns all matching filenames
- apparently fnmatch() is used in the glob() implementation