attrib的c源代码.txt

This program is free software you can redistribute it and/or modify it under the terms of the GNU Ge

/* 
*  attrib - Change file attributes 
* 
*  Copyright (C) 1994  Troy Rollo <[e-mail]> 
* 
*  This program is free software; you can redistribute it and/or modify 
*  it under the terms of the GNU General Public License as published by 
*  the Free Software Foundation; either version 2 of the License, or 
*  (at your option) any later version. 
* 
*  This program is distributed in the hope that it will be useful, 
*  but WITHOUT ANY WARRANTY; without even the implied warranty of 
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
*  GNU General Public License for more details. 
* 
*  You should have received a copy of the GNU General Public License 
*  along with this program; if not, write to the Free Software 
*  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
*/ 

#include <stdio.h> 
#include <stddef.h> 
#include <string.h> 
#include <sys/stat.h> 
#include <errno.h> 
#include <stdlib.h> 
#include <io.h> 
#include <dir.h> 
#include <dos.h> 

static char * 
expand_wildcards(char *s) 
{ 
        static  struct find_t info; 
        char wildcard[80]; 
        static char directory[256]; 
        static char filename[256]; 
        unsigned attrib; 
        char *c1, *c2; 

        if (s) 
        { 
                strcpy(wildcard, s); 
                strcpy(directory, wildcard); 
                if ((c1 = strrchr(directory, ’/’)) != 0 || 
                    (c2 = strrchr(directory, ’\\’)) != 0) 
                { 
                        if (c1 > c2) 
                                c1[1] = ’\0’; 
                        else 
                                c2[1] = ’\0’; 
                } 
                else 
                        directory[0] = ’\0’; 
                if (! strchr(wildcard, ’.’)) 
                        strcat(wildcard, &quot;*.*&quot;); 
                attrib = _A_HIDDEN | _A_HIDDEN | _A_ARCH | _A_NORMAL | _A_SUBDIR | _A_RDONLY; 
                if (_dos_findfirst(wildcard, attrib, &amp;info) != 0) 
                        return NULL; 
                while (!strcmp(info.name, &quot;.&quot;) || !strcmp(info.name, &quot;..&quot;)) 
                        if (_dos_findnext(&amp;info)) 
                                return NULL; 
        } 
        else 
        { 
                if (_dos_findnext(&amp;info) != 0) 
                        return NULL; 
        } 
        strcpy(filename, directory); 
        strcat(filename, info.name); 
        return filename; 
} 

int 
main(  int    argc, 
        char    **argv) 
{ 
        char    *pchFile; 
        int    on = 0; 
        int    off = 0; 
        int    turn_on; 
        unsigned value; 

        while (--argc) 
        { 
                argv++; 
                if (**argv == ’-’ || 
                    **argv == ’+’) 
                { 
                        while (**argv) 
                        { 
                                switch(**argv) 
                                { 
                                case ’+’: 
                                        turn_on = 1; 
                                        value = 0; 
                                        break; 

                                case ’-’: 
                                        turn_on = 0; 
                                        value = 0; 
                                        break; 

                                case ’r’: 
                                case ’R’: 
                                        value = _A_RDONLY; 
                                        break; 

                                case ’a’: 
                                case ’A’: 
                                        value = _A_ARCH; 
                                        break; 

                                case ’s’: 
                                case ’S’: 
                                        value = _A_SYSTEM; 
                                        break; 

                                case ’h’: 
                                case ’H’: 
                                        value = _A_HIDDEN; 
                                        break; 
                                        
                                default: 
                                        fprintf(stderr, &quot;Usage: attrib [{+-}{ahrs}] file ...\n&quot;); 
                                        return 1; 
                                } 
                                if (turn_on) 
                                { 
                                        on |= value; 
                                        off &amp;= ~value; 
                                } 
                                else 
                                { 
                                        off |= value; 
                                        on &amp;= ~value; 
                                } 
                                ++*argv; 
                        } 
                } 
                else 
                { 
                        for (pchFile = expand_wildcards(*argv); 
                            pchFile; 
                            pchFile = expand_wildcards(0)) 
                        { 
                                if (_dos_getfileattr(pchFile, &amp;value)) 
                                { 
                                        fprintf(stderr, &quot;%s: %s\n&quot;, pchFile, sys_errlist[errno]); 
                                        return 1; 
                                } 
                                value &amp;= ~off; 
                                value |= on; 
                                if (_dos_setfileattr(pchFile, value)) 
                                { 
                                        fprintf(stderr, &quot;%s: %s\n&quot;, pchFile, sys_errlist[errno]); 
                                        return 1; 
                                } 
                        } 
                } 
        } 
        return 0; 
}