dirname prints all but the final slash-delimited component of each name. Slashes on either side of the final component are also removed. If the string contains no slash, dirname prints ‘.’ (meaning the current directory). Synopsis:
dirname [option] name...
name need not be a file name, but if it is, this operation effectively lists the directory that contains the final component, including the case when the final component is itself a directory.
Together, basename and dirname are designed such that if ‘ls "$name"’ succeeds, then the command sequence ‘cd "$(dirname "$name")"; ls "$(basename "$name")"’ will, too. This works for everything except file names containing a trailing newline.
POSIX allows the implementation to define the results if name is ‘//’. With GNU dirname, the result is ‘//’ on platforms where // is distinct from /, and ‘/’ on platforms where there is no difference.
The program accepts the following option. Also see Common options.
An exit status of zero indicates success, and a nonzero value indicates failure.
# Output "/usr/bin". dirname /usr/bin/sort dirname /usr/bin//.// # Output "dir1" followed by "dir2" dirname dir1/str dir2/str # Output ".". dirname stdio.h