PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (consult the corresponding Linux  manual  page  for  details  of
       Linux behavior), or the interface may not be implemented on Linux.

NAME

       basename — return the last component of a pathname

SYNOPSIS

       #include <libgen.h>

       char *basename(char *path);

DESCRIPTION

       The basename() function shall take the pathname pointed to by path and return a pointer to
       the final component of the pathname, deleting any trailing '/' characters.

       If the string pointed to by path consists entirely of the '/' character, basename()  shall
       return  a pointer to the string "/".  If the string pointed to by path is exactly "//", it
       is implementation-defined whether '/' or "//" is returned.

       If path is a null pointer or points to an empty string, basename() shall return a  pointer
       to the string ".".

       The basename() function may modify the string pointed to by path, and may return a pointer
       to internal storage. The returned pointer might be invalidated or  the  storage  might  be
       overwritten by a subsequent call to basename().

       The basename() function need not be thread-safe.

RETURN VALUE

       The basename() function shall return a pointer to the final component of path.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

   Using basename()
       The  following program fragment returns a pointer to the value lib, which is the base name
       of /usr/lib.

           #include <libgen.h>
           ...
           char *name = "/usr/lib";
           char *base;

           base = basename(name);
           ...

   Sample Input and Output Strings for basename()
       In the following table, the input string is the value pointed to by path, and  the  output
       string is the return value of the basename() function.

                                    ┌───────────────┬───────────────┐
                                    │ Input String  │ Output String │
                                    ├───────────────┼───────────────┤
                                    │"/usr/lib"     │ "lib"         │
                                    │"/usr/"        │ "usr"         │
                                    │"/"            │ "/"           │
                                    │"///"          │ "/"           │
                                    │"//usr//lib//" │ "lib"         │
                                    └───────────────┴───────────────┘

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       dirname()

       The Base Definitions volume of POSIX.1‐2008, <libgen.h>

       The Shell and Utilities volume of POSIX.1‐2008, basename

COPYRIGHT

       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2013 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX),  The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc  and  The  Open  Group.   (This  is
       POSIX.1-2008  with  the  2013  Technical  Corrigendum  1  applied.)  In  the  event of any
       discrepancy between this version and the original IEEE and The Open  Group  Standard,  the
       original  IEEE  and The Open Group Standard is the referee document. The original Standard
       can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most  likely  to  have
       been  introduced  during  the conversion of the source files to man page format. To report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .