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Annotation of src/usr.bin/basename/basename.c, Revision 1.9

1.9     ! deraadt     1: /*     $OpenBSD: basename.c,v 1.8 2005/04/12 06:43:44 otto Exp $       */
1.1       deraadt     2: /*     $NetBSD: basename.c,v 1.9 1995/09/02 05:29:46 jtc Exp $ */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991, 1993, 1994
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
1.5       millert    16:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  */
                     32:
1.7       otto       33: #include <err.h>
                     34: #include <libgen.h>
1.1       deraadt    35: #include <stdio.h>
                     36: #include <stdlib.h>
                     37: #include <string.h>
                     38: #include <locale.h>
                     39: #include <unistd.h>
                     40:
1.4       millert    41: void usage(void);
1.1       deraadt    42:
                     43: int
1.6       deraadt    44: main(int argc, char *argv[])
1.1       deraadt    45: {
1.7       otto       46:        int ch;
1.1       deraadt    47:        char *p;
                     48:
                     49:        setlocale(LC_ALL, "");
                     50:
1.7       otto       51:        while ((ch = getopt(argc, argv, "")) != -1) {
                     52:                switch (ch) {
                     53:                default:
                     54:                        usage();
1.1       deraadt    55:                }
                     56:        }
1.7       otto       57:        argc -= optind;
                     58:        argv += optind;
1.1       deraadt    59:
1.7       otto       60:        if (argc != 1 && argc != 2)
                     61:                usage();
1.1       deraadt    62:
1.8       otto       63:        if (**argv == '\0') {
                     64:                (void)puts("");
                     65:                exit(0);
                     66:        }
1.7       otto       67:        p = basename(*argv);
                     68:        if (p == NULL)
                     69:                err(1, "%s", *argv);
1.1       deraadt    70:        /*
1.7       otto       71:         * If the suffix operand is present, is not identical to the
                     72:         * characters remaining in string, and is identical to a suffix
                     73:         * of the characters remaining in string, the suffix suffix
                     74:         * shall be removed from string.
1.1       deraadt    75:         */
                     76:        if (*++argv) {
1.7       otto       77:                size_t suffixlen, stringlen, off;
1.1       deraadt    78:
                     79:                suffixlen = strlen(*argv);
                     80:                stringlen = strlen(p);
                     81:
                     82:                if (suffixlen < stringlen) {
                     83:                        off = stringlen - suffixlen;
                     84:                        if (!strcmp(p + off, *argv))
                     85:                                p[off] = '\0';
                     86:                }
                     87:        }
1.3       millert    88:        (void)puts(p);
1.1       deraadt    89:        exit(0);
                     90: }
                     91:
1.7       otto       92: extern char *__progname;
1.1       deraadt    93: void
1.6       deraadt    94: usage(void)
1.1       deraadt    95: {
                     96:
1.7       otto       97:        (void)fprintf(stderr, "usage: %s string [suffix]\n", __progname);
1.1       deraadt    98:        exit(1);
                     99: }