|DIRNAME(3)||Library Functions Manual||DIRNAME(3)|
dirname — extract
the directory portion of a pathname
function is the converse of
basename(3); it returns a pointer to
the parent directory of the pathname pointed to by
path. Any trailing ‘/’ characters are
not counted as part of the directory name. If path is
a null pointer, the empty string, or contains no ‘/’
dirname() returns a pointer to the
string ".", signifying the current directory.
On successful completion,
returns a pointer to the parent directory of path.
dirname() fails, a null pointer is
returned and the global variable errno is set to
indicate the error.
The following error codes may be set in errno:
dirname() function conforms to the
X/Open System Interfaces option of the IEEE Std 1003.1-2008
dirname() function first appeared in
Todd C. Miller
dirname() returns a pointer to internal
static storage space that will be overwritten by subsequent calls.
Other vendor implementations of
may modify the contents of the string passed to
dirname(); this should be taken into account when
writing code which calls this function if portability is desired.
|October 20, 2020||OpenBSD-current|