Ubuntu下实现ls -l:i:a:h:

getopt.c

不同的选项参数调用不同的函数：

  1 #include<stdio.h>                                                                                                            
  2 #include<unistd.h>
  3 #include"stat.h"
  4 int main(int argc,char *argv[])
  5 {
  6     char *optstring="-l:i:a:h:";
  7     int c;
  8     while(1)
  9     {
 10         c=getopt(argc,argv,optstring);
 11         if(c==-1)
 12             break;
 13         switch(c)
 14         {
 15             case 'l':
 16                 listl(optarg);
 17                 break;
 18             case 'i':
 19                 listi(optarg);
 20                 break;
 21             case 'a':
 22                 lista(optarg);
 23                 break;
 24             case 'h':
 25                 listh(optarg);
 26                 break;
 27             case 'r':
 28                 printf("识别到可选参数的选项-e\n");
 29                 if(optarg !=NULL)
 30                     printf("参数:%s\n",optarg);
 31                 break;
 32             case '?':
 33                 printf("不认识此选项%s\n",argv[optind-1]);
 34                 break;
 35             case 1:

 36                 printf("非选项参数%s\n",argv[optind-1]);
 37                 break;
 38             default :
 39                 break;
 40         }
 41     }
 42 }                                                                      

 

stat.c

四个选项功能函数实现：

  1 #include"stat.h"                                                                                                                                                                                                                                                                                                               
  2 void listl(char *path)
  3 {
  4     struct stat pstat;
  5     glob_t pglob;
  6     char buf[BUFFSIZE]={};
  7     if(lstat(path,&pstat)<0)
  8     {
  9         perror("lstat()");
 10         return;
 11     }
 12     if(!S_ISDIR(pstat.st_mode))
 13     {
 14         statjudge(path);
 15         return;
 16     }
 17     strcpy(buf,path);
 18     strcat(buf,"/*");
 19     glob(buf,0,NULL,&pglob);
 20 //  memset(buf,'\0',BUFFSIZE);
 21     for(int i=0;i<pglob.gl_pathc;i++)
 22     {
 23         statjudge((pglob.gl_pathv)[i]);
 24     }
 25     globfree(&pglob);
 26 
 27 
 28 
 29 }
 30 void listi(char *path)
 31 {
 32     struct stat pstat;
 33     glob_t pglob;
 34     char buf[BUFFSIZE]={};
 35     if(lstat(path,&pstat)<0)
 36     {
 37         perror("lstat()");
 38         return;
 39     }
 40     if(!S_ISDIR(pstat.st_mode))
 41     {
 42         printf("%ld  %s\n",pstat.st_ino,path);
 43         return;
 44     }
 45     strcpy(buf,path);
 46     strcat(buf,"/*");
 47     glob(buf,0,NULL,&pglob);
 48 //  memset(buf,'\0',BUFFSIZE);
 49     for(int i=0;i<pglob.gl_pathc;i++)
 50     {
 51         if(lstat(((pglob.gl_pathv)[i]),&pstat)<0)
 52         {
 53             perror("lstat()");
 54             return;
 55         }
 56         char *o=strrchr((pglob.gl_pathv)[i],'/');
 57         printf("%ld  %s\n",pstat.st_ino,++o);
 58 
 59     }
 60     globfree(&pglob);
 61 }
 62 void lista(char *path)
 63 {
 64     struct stat pstat;
 65     glob_t pglob;
 66     char buf[BUFFSIZE]={};
 67     if(lstat(path,&pstat)<0)
 68     {
 69         perror("lstat()");
 70         return;
 71     }
 72     if(!S_ISDIR(pstat.st_mode))
 73     {
 74         printf("%s  ",path);
 75         return;
 76     }
 77     DIR *dp=opendir(path);
 78     struct dirent *rd=NULL;
 79     while(1)
 80     {
 81         rd=readdir(dp);
 82         if(rd==NULL)
 83         {
 84             if(errno)
 85             {
 86                 perror("readdir()");
 87                 closedir(dp);
 88                 return;
 89             }
 90             break;
 91         }
 92         printf("%s  ",rd->d_name);
 93 
 94     }
 95     closedir(dp);
 96     printf("\n");
 97     return;
 98 }
 99 void listh(char *path)
100 {
101     struct stat pstat;
102 //  char *p=NULL;
103     glob_t pglob;
104     char buf[BUFFSIZE]={};
                                                                                                                                                                                                                                                                        

105     if(lstat(path,&pstat)<0)
106     {
107         perror("lstat()");
108         return;
109     }
110     if(!S_ISDIR(pstat.st_mode))
111     {
112         printf("%s  ",path);
113         return;
114     }
115     DIR *dp=opendir(path);
116     struct dirent *rd=NULL;
117     while(1)
118     {
119         rd=readdir(dp);
120         if(rd==NULL)
121         {
122             if(errno)
123             {
124                 perror("readdir()");
125                 closedir(dp);
126                 return;
127             }
128             break;
129         }
130         if((rd->d_name)[0]=='.')
131             continue;
132         printf("%s  ",rd->d_name);
133         
134     }
135     closedir(dp);
136     printf("\n");
137 
138     
139 
140 }
141 void statjudge(char *path)
142 {
143     
144     struct stat mystat;
145     if(stat(path,&mystat)==-1)
146     {
147         perror("stat()");
148         return ;
149     }
150     switch(mystat.st_mode & S_IFMT)

151     {
152         case S_IFSOCK:
153             printf("s");
154             break;
155         case S_IFLNK:
156             printf("l");
157             break;
158         case S_IFREG:
159             printf("-");
160             break;
161         case S_IFBLK:
162             printf("b");
163             break;
164         case S_IFDIR:
165             printf("d");
166             break;
167         case S_IFCHR:
168             printf("c");
169             break;
170         case S_IFIFO:
171             printf("p");
172             break;
173         fefault :
174             break;
175     }
176 //  printf("\n");
177     if(mystat.st_mode & S_IRUSR)
178         putchar('r');
179     else
180         putchar('-');
181     if(mystat.st_mode & S_IWUSR)
182         putchar('w');
183     else
184         putchar('-');
185     if(mystat.st_mode & S_IXUSR)
186         if(mystat.st_mode & S_ISUID)
187             putchar('s');
188         else
189             putchar('x');
190     else
191         putchar('-');
192     if(mystat.st_mode & S_IRGRP)
193         putchar('r');
194     else
195         putchar('-');
196     if(mystat.st_mode & S_IWGRP)
197         putchar('w');
198     else
199         putchar('-');         

200     if(mystat.st_mode & S_IXGRP)
201         if(mystat.st_mode & S_ISGID)
202             putchar('s');
203         else
204         putchar('x');
205     else
206         putchar('-');
207     if(mystat.st_mode & S_IROTH)
208         putchar('r');
209     else
210         putchar('-');
211     if(mystat.st_mode & S_IWOTH)
212         putchar('w');
213     else
214         putchar('-');
215     if(mystat.st_mode & S_IXOTH)
216         if(mystat.st_mode & S_ISVTX)
217             putchar('t');
218         else
219         putchar('x');
220     else
221         putchar('-');
222       
223     printf(" %ld",mystat.st_nlink);
224 
225     struct passwd *pwd=NULL;//文件拥有者
226     pwd = getpwuid(mystat.st_uid);
227     printf(" %s ",pwd->pw_name);
228 
229     struct group *grp=NULL;//文件所属组
230     grp=getgrgid(mystat.st_gid);
231     printf(" %s ",grp->gr_name);
232 
233     printf(" %ld ",mystat.st_size);//总字节个数
234 
235 
236 
237     //获取文件时间　atime mtime ctime
238     struct tm *tmp=NULL;
239     tmp=localtime(&mystat.st_mtim.tv_sec);
240     //if error
241     char buf[BUFSIZE]={};
242     strftime(buf,BUFSIZE,"%m月 %d   %H:%M ",tmp);
243     printf("%s ",buf);

245     //文件名
246     char *p=strrchr(path,'/');
247     printf("%s ",++p);
248 
249     putchar('\n');
250     return ;
251 }                          

stat.h

  1 #ifndef __STAT_H_                                                                                                                                                                    
  2 #define __STAT_H_
  3 #include<stdio.h>
  4 #include<sys/types.h>
  5 #include<sys/stat.h>
  6 #include<unistd.h>
  7 #include<pwd.h>
  8 #include<grp.h>
  9 #include<errno.h>
 10 #include<time.h>
 11 #include<dirent.h>
 12 #include<glob.h>
 13 #include<string.h>
 14 #define BUFSIZE 100
 15 #define BUFFSIZE 1024
 16 
 17 void statjudge(char *path);
 18 void listl(char *path);
 19 void listi(char *path);
 20 void lista(char *path);
 21 void listh(char *path);
 22 
 23 
 24 #endif

makefile:

  1 main : getopt.o stat.o                                                                                                                                                               
  2     gcc getopt.o stat.o -o main
  3 clean :
  4     rm -rf *.o main

运行结果：

.　当前目录

zj@zj-pc:~/4.dir/3-13.c/homework1$ ./main -l .
-rw-rw-r-- 1 zj  zj  695 03月 15   15:57  getopt.c 
-rw-rw-r-- 1 zj  zj  2656 03月 15   15:57  getopt.o 
-rwxrwxr-x 1 zj  zj  14112 03月 15   15:57  main 
-rw-rw-r-- 1 root  zj  78 03月 14   22:12  makefile 
-rw-rw-r-- 1 zj  zj  3865 03月 15   12:17  stat.c 
-rw-rw-r-- 1 root  zj  414 03月 15   11:57  stat.h 
-rw-rw-r-- 1 zj  zj  7536 03月 15   15:57  stat.o

zj@zj-pc:~/4.dir/3-13.c/homework1$ ./main -i .
131948  getopt.c
131381  getopt.o
131951  main
132187  makefile
131957  stat.c
132121  stat.h
131950  stat.o

zj@zj-pc:~/4.dir/3-13.c/homework1$ ./main -a .
getopt.o  .  makefile  stat.c  main  stat.o  stat.h  ..  getopt.c  
zj@zj-pc:~/4.dir/3-13.c/homework1$ ./main -h .
getopt.o  makefile  stat.c  main  stat.o  stat.h  getopt.c