make output line buffered if selecting only some of the entries

[unix-history] / usr / src / usr.bin / basename / basename.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[] = "@(#)basename.c  4.6 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>

main(argc, argv)
       int argc;
       char **argv;
{
       register char *p, *t;
       char *base;

       if (argc < 2 || argc > 3) {
               fprintf(stderr, "usage: basename string [suffix]\n");
               exit(1);
       }
       for (p = base = *++argv; *p;)
               if (*p++ == '/')
                       base = p;
       if (argc == 3) {
               for (t = *++argv; *t; ++t);
               do {
                       if (t == *argv) {
                               *p = '\0';
                               break;
                       }
               } while (p >= base && *--t == *--p);
       }
       printf("%s\n", base);
       exit(0);
}