1 #include <stdio.h>
2 #include <sys/types.h>
3 #include <sys/stat.h>
4 #include <unistd.h>
5 #include <pwd.h>
6 #include <grp.h>
7 #include <time.h>
8 #include <errno.h>
9 #include <dirent.h>
10 #include <string.h>
11 #include <stdlib.h>
12
13 int llstat(char *p);
14 int astat(char *p);
15 int istat(char *p);
16 int hstat(char *p);
17 static int nums;
18
19 int main(int argc, char **argv)
20 {
21 int c;
22 char *optstring = "-laih";
23 if(argc < 3)
24 return 1;
25 while (1){
26 c = getopt(argc, argv, optstring);
27 if(c == -1)
28 break;
29 switch(c){
30 case 'l': llstat(argv[2]);break;
31 case 'a': astat(argv[2]);break;
32 case 'i': istat(argv[2]);break;
33 case 'h': hstat(argv[2]);break;
34 // case '1': printf("非选项参数\n");break;
35 case '?': printf("?\n");break;
36 default : break;
37 }
38 }
39 return 0;
40
41 }
42
43 //-l
44 //文件名->路径
45 static char *buf_cat(const char *p, const char *name)
46 {
47 char *bufcat = malloc(1024);
48 memset(bufcat,'\0',1024);
49 strcpy(bufcat,p);
50 strcat(bufcat,"/");
51 strcat(bufcat,name);
52 return bufcat;
53 }
54 // 判断是否为隐藏文件
55 static int is_i(const char *p)
56 {
57 if(*p == '.')
58 return 1;
59 else
60 return 0;
61 }
62
63 int l_llstat(const char *p, const char *name)
64 {
65 struct stat mystat;
66 struct passwd *pwd = NULL;
67 struct group *grp = NULL;
68 struct tm *tmp = NULL;
69 char *buf=NULL;
70
71 buf = buf_cat(p,name);
72 if(lstat(buf,&mystat) == -1){
73 perror("stat()");
74 return 1;
75 }
76 if(is_i(name) == 0){
77 nums+=mystat.st_blocks/2;
78
79 //类型
80 switch(mystat.st_mode & S_IFMT){
81 case S_IFSOCK : putchar('s');break;
82 case S_IFLNK : putchar('l');break;
83 case S_IFREG : putchar('-');break;
84 case S_IFBLK : putchar('b');break;
85 case S_IFDIR : putchar('d');break;
86 case S_IFCHR : putchar('c');break;
87 case S_IFIFO : putchar('p');break;
88 default: break;
89 }
90 //权限
91 if(mystat.st_mode & S_IRUSR)
92 putchar('r');
93 else
94 putchar('-');
95 if(mystat.st_mode & S_IWUSR)
96 putchar('w');
97 else
98 putchar('-');
99 if(mystat.st_mode & S_IXUSR){
100 if(mystat.st_mode & S_ISUID)
101 putchar('s');
102 else
103 putchar('x');
104 }
105 else
106 putchar('-');
107
108 if(mystat.st_mode & S_IRGRP)
109 putchar('r');
110 else
111 putchar('-');
112 if(mystat.st_mode & S_IWGRP)
113 putchar('w');
114 else
115 putchar('-');
116 if(mystat.st_mode & S_IXGRP){
117 if(mystat.st_mode & S_ISGID)
118 putchar('s');
119 else
120 putchar('x');
121 }
122 else
123 putchar('-');
124
125 if(mystat.st_mode & S_IROTH)
126 putchar('r');
127 else
128 putchar('-');
129 if(mystat.st_mode & S_IWOTH)
130 putchar('w');
131 else
132 putchar('-');
133 if(mystat.st_mode & S_IXOTH){
134 if(mystat.st_mode & S_ISVTX)
135 putchar('t');
136 else
137 putchar('x');
138 }
139 else
140 putchar('-');
141 //硬链接
142 printf(" %ld ", mystat.st_nlink);
143 //文件拥有者名
144 pwd = getpwuid(mystat.st_uid);
145 printf("%s ", pwd->pw_name);
146 //文件所有组
147 grp = getgrgid(mystat.st_gid);
148 printf("%s ",grp->gr_name);
149 //总字节个数
150 printf("%5ld ", mystat.st_size);
151 //获取文件时间
152 tmp = localtime(&mystat.st_mtim.tv_sec);
153 strftime(buf, 1024, "%m月 %d %H:%M", tmp);
154 printf("%s ", buf);
155 //文件名
156 printf("%s\n", name);
157 }
158 return 0;
159 }
160
161 int llstat(char *p)
162 {
163 DIR *dp = NULL;
164 struct dirent *entry = NULL;
165 char buf[1024] = {};
166 struct stat mystat1;
167 if(lstat(p,&mystat1) == -1){
168 perror("stat()");
169 return 1;
170 }
171 if(S_ISREG(mystat1.st_mode)){
172 l_llstat(".", p);
173 }else{
174 dp = opendir(p);
175 if(dp == NULL){
176 perror("opendir()");
177 return 1;
178 }
179
180 while(1){
181 entry = readdir(dp);
182 if(NULL == entry){
183 if(errno){
184 perror("readdir()");
185 closedir(dp);
186 return 1;
187 }
188 break;
189 }
190 l_llstat(p, entry->d_name);
191 }
192 printf("总用量：%d\n", nums);
193 closedir(dp);
194 } return 0;
195
196 }
197
198
199
200 // a
201
202 int a_llstat(const char *p, const char *name)
203 {
204 struct stat mystat;
205 char *buf=NULL;
206
207 buf = buf_cat(p,name);
208 if(lstat(buf,&mystat) == -1){
209 perror("stat()");
210 return 1;
211 }
212 //文件名
213 printf("%s ", name);
214 return 0;
215 }
216
217 int astat(char *p)
218 {
219 struct stat mystat2;
220 struct dirent *entry = NULL;
221 DIR *dp = NULL;
222 if(lstat(p,&mystat2) == -1){
223 perror("stat()");
224 return 1;
225 }
226
227 if(S_ISREG(mystat2.st_mode)){
228 printf("%s ", p);
229 }
230 dp= opendir(p);
231 if(dp == NULL){
232 perror("opendir()");
233 return 1;
234 }
235
236 while(1){
237 entry = readdir(dp);
238 if(NULL == entry){
239 if(errno){
240 perror("readdir()");
241 closedir(dp);
242 return 1;
243 }
244 break;
245 }
246 a_llstat(p, entry->d_name);
247 }
248
249 closedir(dp);
250 printf("\n");
251 return 0;
252
253 }
254
255 // i
256
257 int i_llstat(const char *p, const char *name)
258 {
259 struct stat mystat;
260 char *buf=NULL;
261
262 buf = buf_cat(p,name);
263 if(lstat(buf,&mystat) == -1){
264 perror("stat()");
265 return 1;
266 }
267 printf("%ld ",mystat.st_ino);
268 //文件名
269 printf("%s ", name);
270 return 0;
271 }
272
273 int istat(char *p)
274 {
275 struct stat mystat2;
276 struct dirent *entry = NULL;
277 DIR *dp = NULL;
278 if(lstat(p,&mystat2) == -1){
279 perror("stat()");
280 return 1;
281 }
282
283 if(S_ISREG(mystat2.st_mode)){
284 if(is_i(p))
285 return 1;
286 printf("%ld ",mystat2.st_ino);
287 printf("%s ", p);
288 }
289 else{
290 dp= opendir(p);
291 if(dp == NULL){
292 perror("opendir()");
293 return 1;
294 }
295
296 while(1){
297 entry = readdir(dp);
298 if(NULL == entry){
299 if(errno){
300 perror("readdir()");
301 closedir(dp);
302 return 1;
303 }
304 break;
305 }
306 if(is_i(entry->d_name))
307 continue;
308 i_llstat(p, entry->d_name);
309 }
310 }
311 closedir(dp);
312 printf("\n");
313 return 0;
314 }
315
316 //h
317 int hstat(char *p)
318 {
319 struct stat mystat2;
320 struct dirent *entry = NULL;
321 DIR *dp = NULL;
322 if(lstat(p,&mystat2) == -1){
323 perror("stat()");
324 return 1;
325 }
326
327 if(!((mystat2.st_mode & S_IFMT) == S_IFDIR)){
328 if(!is_i(p)){
329 printf("%s\n", p);
330 return 1;
331 }
332 } else{
333
334 dp= opendir(p);
335 if(dp == NULL){
336 perror("opendir()");
337 return 1;
338 }
339
340 while(1){
341 entry = readdir(dp);
342 if(NULL == entry){
343 if(errno){
344 perror("readdir()");
345 closedir(dp);
346 return 1;
347 }
348 break;
349 }
350 if(is_i(entry->d_name) == 0)
351 printf("%s ", entry->d_name);
352 }
353 closedir(dp);
354 }
355 printf("\n");
356 return 0;
357 }
