cmd/basename/basename.c

	basename.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static void output(char *);
static void usage(void);

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

    (void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
    (void) textdomain(TEXT_DOMAIN);

    if (argc == 1)
        output(".");

    if (strcmp(argv[1], "--") == 0) {
        argv++;
        argc--;
    }

    if (argc == 1)
        output(".");

    if (argc > 3)
        usage();

    string = argv[1];
    suffix = (argc == 2) ? NULL : argv[2];

    if (*string == '\0')
        output(".");

    /* remove trailing slashes */
    p = string + strlen(string) -1;
    while ((p >= string) && (*p == '/'))
        *p-- = '\0';

    if (*string == '\0')
        output("/");

    /* skip to one past last slash */
    if ((p = strrchr(string, '/')) != NULL)
        string = p + 1;

    /*
     * if a suffix is present and is not the same as the remaining
     * string and is identical to the last characters in the remaining
     * string, remove those characters from the string.
     */
    if (suffix != NULL)
        if (strcmp(string, suffix) != NULL) {
            p = string + strlen(string) - strlen(suffix);
            if (strcmp(p, suffix) == NULL)
                *p = '\0';
        }

    output(string);
    return (0);
}

static void
output(char *string)
{
    (void) printf("%s\n", string);
    exit(0);
}

static void usage(void)
{
    (void) fprintf(stderr,
        gettext("Usage: basename string [ suffix ]\n"));
    exit(1);
}