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 .