实现linux ls-l,实现linux ls -l的功能（简易模仿欢迎指正粗糙勿喷）

#include

char* file_time(time_t t,char* str)

{

struct tm* it = localtime(&t);

sprintf(str,"%4d-%02d-%02d %02d:%02d:%02d",it->tm_year+1900,it->tm_mon+1,it->tm_mday,it->tm_hour,it->tm_min,it->tm_sec);

return str;

}

char* file_mode(mode_t m,char* str)

{

if(S_ISREG(m))

str[0] = '-';

else if(S_ISDIR(m))

str[0] = 'd';

else if(S_ISCHR(m))

str[0] = 'c';

else if(S_ISBLK(m))

str[0] = 'b';

else if(S_ISFIFO(m))

str[0] = 'q';

else if(S_ISLNK(m))

str[0] = 'l';

else if(S_ISSOCK(m))

str[0] = 's';

else

str[0] = '?';

str[1] = '\0';

strcat(str,S_IRUSR&m?"r":"-");

strcat(str,S_IWUSR&m?"w":"-");

strcat(str,S_IXUSR&m?"x":"-");

strcat(str,S_IRGRP&m?"r":"-");

strcat(str,S_IWGRP&m?"w":"-");

strcat(str,S_IXGRP&m?"x":"-");

strcat(str,S_IROTH&m?"r":"-");

strcat(str,S_IWOTH&m?"w":"-");

strcat(str,S_IXOTH&m?"x":"-");

return str;

}

int main()

{

DIR* dp = opendir(".");

if(NULL == dp)

{

perror("opendir");

return -1;

}

struct dirent* de = readdir(dp);

struct stat buf = {};

char str[50] = {};

for(de; NULL!=de;de=readdir(dp))

{

stat(de->d_name,&buf);

printf("%s ",file_mode(buf.st_mode,str));

printf("zhizhen ");

printf("%s ",file_time(buf.st_mtime,str));

printf("%s\n",de->d_name);

}

标签：de,strcat,else,tm,指正,ls,str,linux,include

来源： https://blog.csdn.net/weixin_44916364/article/details/97486942