下实现lsl功能c程序

1、程序截图#include<stdio.h>#include<sys/types.h>#include<unistd.h>#include<sys/stat.h>#include<time.h>#include<pwd.h>#include<grp.h>#include<dirent.h>#include<stdlib.h>void display_file(char *filename);void display_dir(char *dirname);int main(int argc,

2、char *argv) struct stat buf; if(argc < 2) printf("usage:%s filen",argv0); return 0; if(lstat(argv1,&buf)= -1) perror("stat"); return -1; if(S_ISDIR(buf.st_mode)/判断是否是文件夹 display_dir(argv1); else display_file(argv1);/不是文件夹情况 return 0;void display_dir(char *dirname) DIR *dp;

3、 struct dirent *filename; char dirfilename100=0; int i=0; dp=opendir(dirname); if(dp = NULL) perror("opendtr"); while(filename=readdir(dp)!=NULL) if(strcmp(".",filename->d_name)=0|strcmp(".",filename->d_name)=0) continue; sprintf(dirfilename,"%s/%s",dirn

4、ame,filename->d_name);/把文件夹中的文件名以字符串型式写到数组中 display_file(dirfilename);/调用文件函数 closedir(dp);void display_file(char *filename) int i=8; struct stat buf; struct tm *p; if(lstat(filename,&buf)=-1) perror("stat"); /return -1; switch(buf.st_mode & 0170000) case S_IFLNK: printf("l

5、");break; case S_IFREG: printf("-");break; case S_IFBLK: printf("b");break; case S_IFDIR: printf("d");break; case S_IFCHR: printf("c");break; case S_IFIFO: printf("i");break; case S_IFSOCK: printf("s");break; for(i=8;i>=0;i-) if(buf

6、.st_mode & (1<<i) switch(i%3) case 0:printf("x");break; case 1:printf("w");break; case 2:printf("r");break; else printf("-"); p=localtime(&buf.st_mtime); printf(" %d %s %s %ld %d-%02d-%02d %02d:%02d ", buf.st_nlink, getpwuid(buf.st_uid)->pw_name, getgrgid(buf.st_gid)->gr_name, buf.st_size, p->tm_year+1900,p->t