basename, dirname —
return filename or directory portion of pathname
basename deletes any prefix ending with the last slash
‘/’ character present in
string, and a suffix, if given.
The resulting filename is written to the standard output. A non-existent
suffix is ignored.
dirname deletes the filename portion,
beginning with the last slash ‘/’
character to the end of string, and writes the result
to the standard output.
Both the basename and dirname
utilities exit 0 on success, and >0 if an error occurs.
The following line sets the shell variable FOO to
/usr/bin.
FOO=`dirname
/usr/bin/trail`
The basename and dirname
utilities conform to IEEE Std 1003.2-1992
(“POSIX.2”).