dirname: Strip last file name component
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,
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.
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
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.
Output a zero byte (ASCII NUL) at the end of each line, rather than a newline. This option enables other programs to parse the output even when that output would contain data with embedded newlines.
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