myfind/display_perm/display_perm.c


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#include <stdio.h>
#include <sys/stat.h>

int main(int argc, char **argv)
{
    if (argc != 2)
        return 2;

    struct stat s;
    stat(argv[1], &s);

    // User
    printf("%d",
           ((s.st_mode & S_IRUSR) != 0) * 4 + ((s.st_mode & S_IWUSR) != 0) * 2
               + ((s.st_mode & S_IXUSR) != 0));
    printf("%d",
           ((s.st_mode & S_IRGRP) != 0) * 4 + ((s.st_mode & S_IWGRP) != 0) * 2
               + ((s.st_mode & S_IXGRP) != 0));
    printf("%d",
           ((s.st_mode & S_IROTH) != 0) * 4 + ((s.st_mode & S_IWOTH) != 0) * 2
               + ((s.st_mode & S_IXOTH) != 0));
    printf("\n");

    return 0;
}