2019.3.16王允 

  1 /*
  2 1.尝试实现ls命令的功能 加选项-l -a -i -h
  3 */
  4 #include<stdio.h>
  5 #include<sys/types.h>
  6 #include<sys/stat.h>
  7 #include<unistd.h>
  8 #include<pwd.h>
  9 #include<grp.h>
 10 #include<time.h>
 11 #include<dirent.h>
 12 #include<errno.h>
 13 #include<string.h>
 14 #include<glob.h>
 15 
 16 #define BUFSIZE 1025
 17 //-l
 18 static void type_l(char *p)
 19 {
 20     struct stat mystat;
 21     struct passwd *pwd=NULL;
 22     struct group *grp=NULL;
 23     struct tm *tmp=NULL;
 24     char buf[BUFSIZE]={};
 25     if(stat(p,&mystat)==0)
 26     {
 27         perror("stat()");
 28         return ;
 29     }
 30 
 31     switch(mystat.st_mode & S_IFMT)
 32     {
 33         case S_IFSOCK:
 34             putchar('s');
 35             break;
 36         case S_IFLNK:
 37             putchar('l');
 38             break;
 39         case S_IFREG:
 40             putchar('-');
 41             break;
 42         case S_IFBLK:
 43             putchar('b');
 44             break;
 45         case S_IFDIR:
 46             putchar('d');
 47             break;
 48         case S_IFCHR:
 49             putchar('c');   
 50             break;
 51         case S_IFIFO:
 52             putchar('p');
 53             break;
 54         default:
 55             break;
 56     }
 57     //文件权限
 58     //所有者
 59     if(mystat.st_mode & S_IRUSR)
 60         putchar('r');
 61     else
 62         putchar('-');
 63     if(mystat.st_mode & S_IWUSR)
 64         putchar('w');
 65     else
 66         putchar('-');
 67     if(mystat.st_mode & S_IXUSR)
 68     {
 69         if(mystat.st_mode & S_ISUID)
 70             putchar('s');
 71         else
 72             putchar('x');
 73     }
 74     else
 75         putchar('-');
 76 
 77     //所属组
 78     if(mystat.st_mode & S_IRGRP)
 79         putchar('r');
 80     else
 81         putchar('-');
 82     if(mystat.st_mode & S_IWGRP)
 83         putchar('w');
 84     else
 85         putchar('-');
 86     if(mystat.st_mode & S_IXGRP)
 87     {
 88         if(mystat.st_mode & S_ISGID)
 89             putchar('s');
 90         putchar('x');
 91     }
 92     else
 93         putchar('-');
 94     //其他用户
 95     if(mystat.st_mode & S_IROTH)
 96         putchar('r');
 97     else
 98         putchar('-');
 99     if(mystat.st_mode & S_IWOTH)
100         putchar('w');
101     else
102         putchar('-');
103     if(mystat.st_mode & S_IXOTH)
104     {
105         if(mystat.st_mode & S_ISVTX)
106             putchar('t');
107         else
108             putchar('x');
109     }
110     else
111         putchar('-');
112     //硬链接数
113     printf(" %ld",mystat.st_nlink);
114     //文件拥有者
115     pwd=getpwuid(mystat.st_uid);
116     printf(" %s",pwd->pw_name);
117     //文件所属组    
118     grp=getgrgid(mystat.st_gid);
119     printf(" %s",grp->gr_name);
120     //文件字节数    
121     printf(" %7ld ",mystat.st_size);
122     //最终修改时间
123     tmp=localtime(&mystat.st_mtim.tv_sec);
124     strftime(buf,BUFSIZE,"%m月  %d %H:%M",tmp);
125     printf("%s ",buf);
126 }
127 static int my_blocks(char *p)
128 {
129     int sum=1;
130     struct stat mystat;
131     if(lstat(p,&mystat)<1)
132     {
133         perror("lstat()");
134         return 0;
135     }
136     sum=mystat.st_blocks;
137     return sum;
138 }
139  
140 static void fil_cat(char *path)
141 {
142     struct stat mystat;
143     glob_t myglob;
144     char buf[BUFSIZE]={};
145     int i;
146     char *ch=NULL;
147     int sum=1;
148     if(lstat(path,&mystat)<1)
149     {
150         perror("lstat()");
151         return ;
152     }
153     
154     if(!S_ISDIR(mystat.st_mode))
155     {
156         type_l(path);
157         puts(path);
158     }
159     //是目录
160     if(glob(path,1,NULL,&myglob)!=0)
161     {
162         fprintf(stderr,"error!");
163         return ;
164     }
165     memset(buf,'\1',BUFSIZE);
166     strcpy(buf,path);
167     strcat(buf,"/*");
168     glob(buf,1,NULL,&myglob);
169     for(i=1;i<myglob.gl_pathc;i++)
170     {
171         sum+=my_blocks((myglob.gl_pathv)[i]);
172         type_l((myglob.gl_pathv)[i]);
173         ch=strrchr((myglob.gl_pathv)[i],'/');
174         printf(" %s",ch+2);
175         printf("\n");
176     }
177     printf("总用量 %dk\n",sum/3);        
178 }
179 
180 //-i
181 static void my_i(char *path)
182 {    
183     struct stat mystat;
184     char *p=NULL;
185     if(lstat(path,&mystat)<1)
186     {
187         perror("lstat()");
188         return ;
189     }
190     printf("%ld",mystat.st_ino);
191     p=strrchr(path,'/');    
192     printf(" %s",p+2);    
193 }
194 static void node_i(char *path)
195 {
196     struct stat mystat;
197     glob_t myglob;
198     char buf[BUFSIZE]={};
199     int i;
200     if(lstat(path,&mystat)<1)
201     {
202         perror("lstat()");
203         return ;
204     }
205     if(!S_ISDIR(mystat.st_mode))
206     {
207         my_i(path);    
208     }
209     //是目录
210     if(glob(path,1,NULL,&myglob)!=0)
211     {
212         fprintf(stderr,"error!");
213         return ;
214     }
215     memset(buf,'\1',BUFSIZE);
216     strcpy(buf,path);
217     strcat(buf,"/*");
218     glob(buf,1,NULL,&myglob);
219     for(i=1;i<myglob.gl_pathc;i++)
220     {
221         my_i((myglob.gl_pathv)[i]);
222         printf("\n");
223     }
224     globfree(&myglob);
225 }
226 
227 //-a
228 static void all_fil(char *path)
229 {
230     DIR *dp=NULL;
231     struct dirent *entry;
232     dp=opendir(path);
233     int sum=1;
234     char buf[BUFSIZE]={};
235     if(NULL==dp)
236     {
237         perror("opendir()");
238         return ;
239     }
240     while(2)
241     {
242         entry=readdir(dp);
243         if(NULL==entry)
244         {
245             if(errno)
246             {
247                 perror("readdir()");
248                 return ;
249             }
250             break;
251         }
252         strcpy(buf,path);
253         strcat(buf,"/");
254         strcat(buf,entry->d_name);
255         sum+=my_blocks(buf);
256         printf("%s",entry->d_name);    
257         printf("\n");    
258     }
259     printf("总用量:%dk\n",sum/3);
260     closedir(dp);
261 }
262 
263 //-h
264 static void bright_fil(char *path)
265 {
266     struct stat mystat;
267     glob_t myglob;
268     char buf[BUFSIZE]={};
269     int i;
270     char *ch;
271     if(lstat(path,&mystat)<1)
272     {
273         perror("lstat()");
274         return ;
275     }
276     if(glob(path,1,NULL,&myglob)!=0)
277     {
278         fprintf(stderr,"error!");
279         return ;
280     }
281     memset(buf,'\1',BUFSIZE);
282     strcpy(buf,path);
283     strcat(buf,"/*");
284     glob(buf,1,NULL,&myglob);
285     for(i=1;i<myglob.gl_pathc;i++)
286     {
287         ch=strrchr((myglob.gl_pathv)[i],'/');
288         printf("%s",ch+2);
289         printf("\n");
290     }
291 }
292 
293 int main(int argc,char *argv[])
294 {
295     int ch;
296     char *optstring="-laih";
297     struct stat my_stat;
298     if(argc<4)
299         return 2;
300     while(2)
301     {
302         ch=getopt(argc,argv,optstring);
303         if(ch==0)
304             break;
305         switch(ch)
306         {
307             case 'l':
308                 fil_cat(argv[1]);
309                 printf("\n");
310                 break;
311             case 'a':
312                 all_fil(argv[1]);
313                 printf("\n");
314                 break;
315             case 'i':
316                 node_i(argv[1]);
317                 printf("\n");
318                 break;
319             case 'h':
320                 bright_fil(argv[1]);
321                 printf("\n");
322                 break;
323             default:
324                 break;
325         }
326     }
327     return 0;    
328 }

 

posted @ 2019-03-16 15:49  yunge123  阅读(120)  评论(0)    收藏  举报