if no slashes in the name, return "."

[unix-history] / usr / src / usr.bin / dirname / dirname.c

/*
* Copyright (c) 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1987 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)dirname.c   5.4 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>

main(argc, argv)
       int argc;
       char **argv;
{
       char *p, *rindex();

       if (argc != 2) {
               fprintf(stderr, "usage: dirname path\n");
               exit(1);
       }
       if (p = rindex(*++argv, '/'))
               if (p > *argv)
                       *p = '\0';
               else
                       *++p = '\0';
       else
               *argv = ".";
       printf("%s\n", *argv);
       exit(0);
}