王志颖_myls功能实现

  1 #include<stdio.h>
  2 #include<unistd.h>
  3 #include<sys/stat.h>
  4 #include<sys/types.h>
  5 #include<time.h>
  6 #include<pwd.h>
  7 #include<grp.h>
  8 #include<glob.h>
  9 #include<string.h>
 10 #include<errno.h>
 11 #include<dirent.h>
 12 #define BUFSIZE 1024
 13 int _myls_l(char *p);
 14 int is_d(char *p)
 15 {
 16     char buf[BUFSIZE] = {};
 17     struct stat mystat;
 18     int ch;
 19     char *chr = NULL;
 20     int sum = 0;
 21     glob_t glb;
 22     struct stat block;
 23     ch = lstat(p,&mystat);
 24     if(ch == -1)
 25     {
 26         perror("lstat()");
 27         return -1;
 28     }
 29     if(S_ISDIR(mystat.st_mode))
 30     {
 31         strcpy(buf,p);
 32         strcat(buf,"/*");
 33         glob(buf,0,NULL,&glb);
 34         if(glob(buf,0,NULL,&glb) != 0)
 35         {
 36             fprintf(stderr,"glob() is failed");
 37             return -1;
 38         }
 39         for(int i = 0;i < glb.gl_pathc;i++)
 40         {
 41             _myls_l((glb.gl_pathv)[i]);
 42             chr = strrchr((glb.gl_pathv)[i],'/');
 43             printf(" %s\n",chr+1);
 44             lstat(glb.gl_pathv[i],&block);
 45             if(lstat(glb.gl_pathv[i],&block) == -1)
 46             {
 47                 perror("lstat()");
 48                 return -1;
 49             }
 50             sum += block.st_blocks; 
 51         }
 52         
 53         globfree(&glb);
 54         printf("总用量 %d \n",sum/2);
 55     }
 56     else
 57     {
 58         _myls_l(p);
 59         printf("\n");
 60     }
 61     return 1;
 62 }
 63 
 64 int _myls_l(char *p)
 65 {
 66     struct group *grp = NULL;
 67     struct tm *tim = NULL;
 68     char buf[BUFSIZE] = {};
 69     struct passwd *pwd = NULL;
 70     struct stat tp;
 71     int ch;
 72     ch = lstat(p,&tp);
 73     if(ch == -1)
 74     {
 75         perror("lstat()");
 76         return -1;
 77     }
 78     //文件类型
 79     switch(tp.st_mode & S_IFMT)
 80     {
 81         case S_IFSOCK:
 82             printf("s");
 83             break;
 84         case S_IFLNK:
 85             printf("l");
 86             break;
 87         case S_IFREG:
 88             printf("-");
 89             break;
 90         case S_IFBLK:
 91             printf("b");
 92             break;
 93         case S_IFDIR:
 94             printf("d");
 95             break;
 96         default:
 97             break;
 98     }
 99     //权限
100     if(tp.st_mode & S_IRUSR)
101         printf("r");
102     else
103         printf("-");
104     if(tp.st_mode & S_IWUSR)
105         printf("w");
106     else
107         printf("-");
108     if(tp.st_mode & S_IXUSR)
109     {
110         if(tp.st_mode & S_ISUID)
111             printf("s");
112         else
113             printf("x");
114     }
115     else 
116         printf("-");
117     if(tp.st_mode & S_IRGRP)
118         printf("r");
119     else
120         printf("-");
121     if(tp.st_mode & S_IWGRP)
122         printf("r");
123     else
124         printf("-");
125     if(tp.st_mode & S_IXGRP)
126     {
127         if(tp.st_mode & S_ISGID)
128             printf("s");
129         else
130             printf("x");
131     }
132     else
133         printf("-");
134     if(tp.st_mode & S_IROTH)
135         printf("r");
136     else
137         printf("-");
138     if(tp.st_mode & S_IWOTH)
139         printf("w");
140     else
141         printf("-");
142     if(tp.st_mode & S_IXOTH)
143     {
144         if(tp.st_mode & S_ISVTX)
145             printf("t");
146         else
147             printf("x");
148     }
149     else
150         printf("-");
151 //硬链接
152     printf(" %ld",tp.st_nlink);
153 
154     //拥有者
155     pwd = getpwuid(tp.st_uid);
156     printf(" %s",pwd->pw_name);
157     
158     //所属组
159     grp = getgrgid(tp.st_gid);
160     printf(" %s",grp->gr_name);
161     printf(" %ld",tp.st_size);    
162     
163     //时间
164     tim = localtime(&tp.st_mtim.tv_sec);
165     strftime(buf,BUFSIZE,"%m月  %d %H:%M",tim);
166     printf(" %s",buf);
167 
168 
169 }
170 
171 int _inode(char *p)
172 {
173     struct stat id;
174     lstat(p,&id);
175     if(lstat(p,&id) == -1)
176     {
177         perror("lstat()");
178         return -1;
179     }
180     printf(" %ld",id.st_ino);
181     return 1;
182 }
183 int _isd_ino(char *p)
184 {
185     char buf[BUFSIZE] = {};
186     struct stat mystat;
187     int ch;
188     char *chr;
189     glob_t glb;
190     ch = lstat(p,&mystat);
191     if(ch == -1)
192     {
193         perror("lstat()");
194         return -1;
195     }
196     if(S_ISDIR(mystat.st_mode))
197     {
198         strcpy(buf,p);
199         strcat(buf,"/*");
200         glob(buf,0,NULL,&glb);
201         if(glob(buf,0,NULL,&glb) !=  0)
202         {
203             fprintf(stderr,"glob() is failed");
204             return -1;
205         }
206         for(int i = 0;i < glb.gl_pathc; i++)
207         {
208             _inode((glb.gl_pathv)[i]);
209             chr = strrchr((glb.gl_pathv)[i],'/');
210             printf(" %s",chr+1);
211             printf("\n");
212         }
213         globfree(&glb);
214     }
215     else
216     {
217         _inode(p);
218         printf(" %s\n",p);
219     }
220     return 1;
221 }
222 
223 int myls_h(char *p)
224 {
225     struct stat mystat;
226     int ch;
227     char buf[BUFSIZE] = {};
228     glob_t glb;
229     char *chr = NULL;
230     ch = lstat(p,&mystat);
231     if(ch == -1)
232     {
233         perror("lstat()");
234         return -1;
235     }
236     if(S_ISDIR(mystat.st_mode))
237     {
238         strcpy(buf,p);
239         strcat(buf,"/*");
240         glob(buf,0,NULL,&glb);
241         if(glob(buf,0,NULL,&glb) != 0 )    
242         {
243             fprintf(stderr,"glob() is failed");
244             return -1;
245         }    
246         for(int i = 0;i < glb.gl_pathc;i++)
247         {
248             chr = strrchr((glb.gl_pathv)[i],'/');
249             printf("%s\n",chr+1);
250         }
251         globfree(&glb);
252     }
253     return 1;
254 }
255 
256 int myls_a(char *p)
257 {
258     DIR *dp = NULL;
259     struct dirent *entry = NULL;    
260     dp = opendir(p);
261     if(dp == NULL)
262     {
263         perror("opendir()");
264         return -1;
265     }
266     while(1)
267     {
268         entry = readdir(dp);
269         if(entry == NULL)
270         {
271             if(errno)
272             {
273                 closedir(dp);
274                 return -1;
275             }
276             break;
277         }
278         printf("%s",entry->d_name);
279         printf("\n");
280     }
281     closedir(dp);
282     return 1;
283 }
284 int main(int argc,char *argv[])
285 {
286     int ch;
287     int n;
288     char *optstring = "li:h:a:";
289     if(argc < 3)
290         return 1;
291     n = argc;
292     //printf("%d\n",n);
293     while(1)
294     {
295         ch = getopt(argc,argv,optstring);
296         if(ch == -1)
297             break;
298         switch(ch)
299         {
300             case 'a':
301                 myls_a(argv[n-1]);
302                 break;
303             case 'h':
304                 myls_h(argv[n-1]);
305                 break;
306             case 'l':
307                 is_d(argv[n-1]);
308             //    _myls_l(is_d(argv[2]));
309                 break;
310             case 'i':
311                 _isd_ino(argv[n-1]);
312                 break;
313             //case 'l':
314             //    is_d(argv[2]);
315             //    _isd_ino(argv[2]);
316             //    break;    
317             case '?':
318                 printf("i do not know");
319                 break;
320             case 1:
321                 printf("%s\n",argv[optind -1]);
322                 break;
323             default:
324                 break;
325         }
326     }
327     return 0;
328 }