53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/* dirname - return directory part of PATH.
|
|
Copyright (C) 1996 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <libgen.h>
|
|
#include <string.h>
|
|
|
|
|
|
char *
|
|
dirname (char *path)
|
|
{
|
|
static const char dot[] = ".";
|
|
char *last_slash;
|
|
|
|
/* Find last '/'. */
|
|
last_slash = path != NULL ? strrchr (path, '/') : NULL;
|
|
|
|
if (last_slash == path)
|
|
/* The last slash is the first character in the string. We have to
|
|
return "/". */
|
|
++last_slash;
|
|
else if (last_slash != NULL && last_slash[1] == '\0')
|
|
/* The '/' is the last character, we have to look further. */
|
|
last_slash = memchr (path, last_slash - path, '/');
|
|
|
|
if (last_slash != NULL)
|
|
/* Terminate the path. */
|
|
last_slash[0] = '\0';
|
|
else
|
|
/* This assignment is ill-designed but the XPG specs require to
|
|
return a string containing "." in any case no directory part is
|
|
found and so a static and constant string is required. */
|
|
path = (char *) dot;
|
|
|
|
return path;
|
|
}
|