dirname(3G) dirname(3G)
NAME
dirname - report the parent directory name of a file path name
SYNOPSIS
cc [flag . . . ] file . . . -lgen [library] . . .
#include <libgen.h>
char *dirname(char *path);
DESCRIPTION
Given a pointer to a null-terminated character string that
contains a file system path name, dirname returns a pointer to
a static constant string that is the parent directory of that
file. In doing this, it sometimes places a null byte in the
path name after the next to last element, so the content of
path must be disposable. Trailing ``/'' characters in the
path are not counted as part of the path.
If path or *path is zero, a pointer to a static constant ``.''
is returned.
dirname and basename together yield a complete path name.
dirname (path) is the directory where basename (path) is
found.
Examples
A simple file name and the strings ``.'' and ``..'' all have
``.'' as their return value.
Input string Output pointer
_____________________________
/usr/lib /usr
/usr/ /
usr .
/ /
. .
.. .
The following code reads a path name, changes directory to the
appropriate directory [see chdir(2)], and opens the file.
char path[100], *pathcopy;
int fd;
gets (path);
pathcopy = strdup (path);
chdir (dirname (pathcopy) );
fd = open (basename (path), O_RDONLY);
Copyright 1994 Novell, Inc. Page 1
dirname(3G) dirname(3G)
REFERENCES
basename(1), basename(3G), chdir(2)
Copyright 1994 Novell, Inc. Page 2