dirname.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 80 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  POSIX dirname utility
*               Splits directory component out of a pathname
*
****************************************************************************/


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

#include "misc.h"
#include "getopt.h"
#include "argvrx.h"
#include "argvenv.h"

char *OptEnvVar="dirname";

static const char *usageMsg[] = {
    "Usage: dirname [-?] [@env] pathname",
    "\tenv                : environment variable to expand",
    "\tpathname           : filename from which to split directory component",
    "\tOptions: -?        : display this message",
    NULL
};

void main( int argc, char **argv )
{
    char        *dir, *drive;
    unsigned     len;

    argv = ExpandEnv( &argc, argv );
    GetOpt( &argc, argv, "", usageMsg );

    if( argc != 2 ) {
        Die( "%s\n", usageMsg[0] );
    } else {
        len    = strlen( argv[1] );

        dir    = (char *) malloc( len * sizeof( char ) );
        drive  = (char *) malloc( len * sizeof( char ) );

        _splitpath( argv[1], drive, dir, NULL, NULL );

        if( *dir == '\0'  &&  *drive == '\0' ) {
            fprintf( stdout, ".\\\n" );
        } else {
            fprintf( stdout, "%s%s\n", drive, dir );
        }

        free( dir );
        free( drive );
    }
}