// An example showing how to use stat and 
// extract information about the file type
// and access permissions

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

int main(int argc, char* argv[]){ 
    struct stat s; 
    if( argc < 2){
        fprintf(stderr,"Usage...\n");
        return 1;
    } 
    //man 2 stat for system call
    //man 3 stat for struct
    if(stat(argv[1],&s) < 0){
        perror("");
        return 1;
    }
    printf("size: %ld\n", s.st_size );
    
    printf("mode %u %o\n",s.st_mode, s.st_mode);
      
    //man 7 inode for more details                    
    if (s.st_mode & S_IRUSR){
        printf("Owner can read\n");
    } else {
        printf("Owner can't read\n");
    }

    if (s.st_mode & S_IXOTH){
        printf("Others can execute\n");
    } else {
        printf("Others can't execute\n");
    }
    
    if(S_ISREG(s.st_mode)){
        printf("This is a regular file\n");
    } else {
        printf("This is not a regular file\n");
    }
    
    if(S_ISDIR(s.st_mode)){
        printf("This is a dir\n");
    } else {
        printf("This is not a dir\n");
    }
    
    if(S_ISLNK(s.st_mode)){
        printf("This is a symbolic link\n");
    } else {
        printf("This is not a symbolic link\n");
    }
    
   
    return 0;
}