basename (1plan9)

basename [ -d ] string [ suffix ]

Basename deletes any prefix ending in slash (/) and the suffix, if present in string, from string, and prints the result on the standard output.

The -d option instead prints the directory component, that is, string up to but not including the final slash. If the string contains no slash, a period and newline are printed.

\*9/src/cmd/basename.c