【操作系统】实验6

操作系统】实验6"/>

【操作系统】实验6

【操作系统】实验6-仿写Linux下的ls-s命令(转载)

#include<iostream>
#include<dirent.h>
#include<sys/stat.h>
#include<string.h>//memcmp()
#include<grp.h>//getgrgid
#include<unistd.h>//getcwd
#include<pwd.h>//getpwuid
#include<cstdio>
using namespace std;int ls(char *dirpath);
int ls_l(char *dirpath);char filename[100][255];
int filenum = 0;int main(int args,char* argv[]) {cout<<"180511315刘东旭"<<endl;char dir[255];getcwd(dir,255);if( args > 1){ls_l(dir);}else{ls(dir);}return 0;
}
int ls(char *dirpath){DIR *dir;struct dirent *file;struct stat info;if(!(dir = opendir(dirpath))){cout<<"fail to read"<<dirpath;return -1;}while((file = readdir(dir))!= NULL){if(strncmp(file->d_name, ".", 1) == 0)continue;stat(file->d_name,&info);cout<<file->d_name<<endl;}cout<<endl;closedir(dir);return 1;
}
void power(int mode, char str[]){strcpy(str, "----------");if (S_ISDIR(mode)) str[0] = 'd';if (S_ISCHR(mode)) str[0] = 'c';if (S_ISBLK(mode)) str[0] = 'b';if ((mode & S_IRUSR)) str[1] = 'r';if ((mode & S_IWUSR)) str[2] = 'w';if ((mode & S_IXUSR)) str[3] = 'x';if ((mode & S_IRGRP)) str[4] = 'r';if ((mode & S_IWGRP)) str[5] = 'w';if ((mode & S_IXGRP)) str[6] = 'x';if ((mode & S_IROTH)) str[7] = 'r';if ((mode & S_IWOTH)) str[8] = 'w';if ((mode & S_IXOTH)) str[9] = 'x';
}
int ls_l(char *dirpath){DIR *dir;struct dirent *file;struct stat info;if(!(dir = opendir(dirpath))){cout<<"fail to read"<<dirpath;return -1;}struct passwd *userinfo;struct group *groupinfo;while((file = readdir(dir))!= NULL){if(strncmp(file->d_name, ".", 1) == 0)continue;strcpy(filename[filenum++],file->d_name);stat(file->d_name,&info); userinfo = getpwuid(info.st_uid);groupinfo = getgrgid(info.st_gid);char pw[11];power(info.st_mode,pw);cout<<pw<<" " <<info.st_nlink<<" "<< userinfo->pw_name<<" "<<groupinfo->gr_name<<" "<<info.st_size<<" ";printf(" %.12s", 4 + ctime(&info.st_mtime));cout<<" "<<file->d_name;cout<<endl;}closedir(dir);return 1;
}

转载自：

(如有侵权，请联系我删除)