DIRNAME(3) Library Functions Manual DIRNAME(3)
dirname -- report the parent directory name of a file pathname
Standard C Library (libc, -lc)
The dirname() function takes a pointer to a character string that
contains a pathname, path, and returns a pointer to a string that is a
pathname of the parent directory of path. Trailing `/' characters in
path are not counted as part of the path.
If path does not contain a `/', then dirname() returns a pointer to the
If path is a null pointer or points to an empty string, dirname() returns
a pointer to the string ``.''.
The dirname() function returns a pointer to a string that is the parent
directory of path.
o X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'')
o IEEE Std 1003.1-2001 (``POSIX.1'')
If the length of the result is longer than PATH_MAX bytes (including the
terminating nul), the result will be truncated.
The dirname() function returns a pointer to static storage that may be
overwritten by subsequent calls to dirname(). This is not strictly a
bug; it is explicitly allowed by IEEE Std 1003.1-2001 (``POSIX.1'').
NetBSD 6.1.5 May 10, 2008 NetBSD 6.1.5