linux下实现ls -al的效果

#include <func.h>

int main(int argc,char*argv[])
{
    ARGS_CHECK(argc,2);//参数检错
    DIR *dp=opendir(argv[1]);
    ERROR_CHECK(dp,NULL,"opendir");
    if(strcmp(argv[1],".")!=0){
        chdir(argv[1]);
    }

    struct stat pstat;
    struct dirent *pdirent;
    struct tm*ptm;

    while((pdirent=readdir(dp))!=NULL){
        char type[11]={0};//记录文件类型和权限
        //先记录类型
        switch(pdirent->d_type){
        case DT_BLK:type[0]='b';
                    break;
        case DT_CHR:type[0]='c';
                    break;
        case DT_REG:type[0]='-';
                    break;
        case DT_DIR:type[0]='d';
                    break;
        case DT_LNK:type[0]='l';
        }

        int ret =stat(pdirent->d_name,&pstat);
        ERROR_CHECK(ret,-1,"stat");

        //记录权限
        int mode=pstat.st_mode;
        int k=9;
        for(int i=0;i<3;i++){
            for(int j=0;j<3;j++){
                if((mode&1)&&(k>0)){
                    switch(j){
                    case 0:type[k--]='x';
                           break;
                    case 1:type[k--]='w';
                           break;
                    case 2:type[k--]='r';
                           break;
                    }
                }
                else{
                    type[k--]='-';
                }
                mode>>=1;
            }
        }

        //记录时间
        ptm=gmtime(&pstat.st_mtime);

        printf("%s %ld %s %s %5ld %d月 %3d %2d:%2d %s\n",type,pstat.st_nlink,
               getpwuid(pstat.st_uid)->pw_name,getgrgid(pstat.st_gid)->gr_name,
               pstat.st_size,ptm->tm_mon+1,ptm->tm_mday,(8+ptm->tm_hour)%24,ptm->tm_min,
               pdirent->d_name);
    }
    return 0;
}