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  1. #include <iostream>
  2. #include <sys/types.h>
  3. #include <sys/stat.h>
  4.  
  5. char const * sperm(__mode_t mode) {
  6.     static char local_buff[16] = {0};
  7.     int i = 0;
  8.     // user permissions
  9.     if ((mode & S_IRUSR) == S_IRUSR) local_buff[i] = 'r';
  10.     else local_buff[i] = '-';
  11.     i++;
  12.     if ((mode & S_IWUSR) == S_IWUSR) local_buff[i] = 'w';
  13.     else local_buff[i] = '-';
  14.     i++;
  15.     if ((mode & S_IXUSR) == S_IXUSR) local_buff[i] = 'x';
  16.     else local_buff[i] = '-';
  17.     i++;
  18.     // group permissions
  19.     if ((mode & S_IRGRP) == S_IRGRP) local_buff[i] = 'r';
  20.     else local_buff[i] = '-';
  21.     i++;
  22.     if ((mode & S_IWGRP) == S_IWGRP) local_buff[i] = 'w';
  23.     else local_buff[i] = '-';
  24.     i++;
  25.     if ((mode & S_IXGRP) == S_IXGRP) local_buff[i] = 'x';
  26.     else local_buff[i] = '-';
  27.     i++;
  28.     // other permissions
  29.     if ((mode & S_IROTH) == S_IROTH) local_buff[i] = 'r';
  30.     else local_buff[i] = '-';
  31.     i++;
  32.     if ((mode & S_IWOTH) == S_IWOTH) local_buff[i] = 'w';
  33.     else local_buff[i] = '-';
  34.     i++;
  35.     if ((mode & S_IXOTH) == S_IXOTH) local_buff[i] = 'x';
  36.     else local_buff[i] = '-';
  37.     i++;
  38.     return local_buff;
  39. }
  40. int main(int argc, char ** argv)
  41. {
  42.     std::cout<<sperm(S_IRUSR | S_IXUSR | S_IWGRP | S_IROTH)<<std::endl;
  43.     std::cout<<sperm(S_IRUSR)<<std::endl;
  44.     std::cout<<sperm(S_IRUSR | S_IRGRP | S_IWOTH | S_IROTH)<<std::endl;
  45.     return 0;
  46. }
Success #stdin #stdout 0.01s 2724KB
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Standard input is empty
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r-x-w-r--
r--------
r--r--rw-
https://ideone.com/C9USp
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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