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basename is a standard UNIX computer program. When basename is given a pathname, it will delete any prefix up to the last slash (
'/') character and return the result. basename is described in the Single UNIX Specification and is primarily used in shell scripts.
The Single UNIX Specification specification for basename is.
basename string [suffix]
- A pathname
- If specified, basename will also delete the suffix.
basename will retrieve the last name from a pathname ignoring any trailing slashes
$ basename /home/jsmith/base.wiki base.wiki
$ basename /home/jsmith/ jsmith
$ basename / /
basename can also be used to remove the end of the base name, but not the complete base name
$ basename /home/jsmith/base.wiki .wiki base
$ basename /home/jsmith/base.wiki ki base.wi
$ basename /home/jsmith/base.wiki base.wiki base.wiki
Since basename accepts only one operand, its usage within the inner loop of shell scripts can be detrimental to performance. Consider
while read file; do basename "$file" ; done < ''some-input''
The above excerpt would cause a separate process invocation for each line of input. For this reason, shell substitution is typically used instead
Note that this handles trailing slashes differently than basename.
- The Single UNIX® Specification, Issue 7 from The Open Group : return non-directory portion of a pathname – Commands & Utilities Reference,