displaying file permissions

I am having some troubles in displaying the file permissions for a file!!! ...At the moment, all it does is display the integer format for file permissions, as all i am doing is:

Code:

printf("%d", fileattrib.st_mode);

which outputs the following (along with a few other lines of output code)

Code:

list of contents for: cwd
33261   1 root     root         15343 Fri Nov 25 11:34:48 2005 myls
33188   1 root     root          7735 Fri Nov 25 11:34:43 2005 myls.c
33188   1 root     root          7131 Fri Nov 25 10:15:49 2005 myls.c~
16877   2 root     root          4096 Fri Nov 25 11:31:09 2005 test1

I need to find out how to format it so that it outputs the following for the file permissions: (output from the propper ls command using -l switch)

Code:

total 36
-rwxr-xr-x    1 root     root        15343 Nov 25 11:34 myls
-rw-r--r--    1 root     root         7735 Nov 25 11:34 myls.c
-rw-r--r--    1 root     root         7131 Nov 25 10:15 myls.c~
drwxr-xr-x    2 root     root         4096 Nov 25 11:31 test1

Anyone know how to do this??? ...i have looked around on the net, some people say to use sperm, but this wont compile, so i am stuck!!!! Cheers, matt.

Take the value of "myls" permission, it's 33261. Now convert it to octal, the value is 100755.
It's a lot easier to understand that way. Hint:

Code:

7 = 111 in binary - rwx
5 = 101 in binary - r-x
5 = 101 in binary - r-x

ah ha!!!! thankyou very very very much!!!! ...now i understand how it becomes 755!!!! cheers

Found another way that works...

Code:

struct stat fileattrib;
int fileMode;       

        /* print a leading dash as start of file/directory permissions */
        printf("-");
        fileMode = fileattrib.st_mode;
        /* Check owner permissions */
        if ((fileMode & S_IRUSR) && (fileMode & S_IREAD))
          printf("r");
        else
          printf("-");
        if ((fileMode & S_IWUSR) && (fileMode & S_IWRITE)) 
          printf("w");
        else
          printf("-");
        if ((fileMode & S_IXUSR) && (fileMode & S_IEXEC))
          printf("x");
        else
          printf("-");
        /* Check group permissions */
        if ((fileMode & S_IRGRP) && (fileMode & S_IREAD))
          printf("r");
        else
          printf("-");
        if ((fileMode & S_IWGRP) && (fileMode & S_IWRITE))
          printf("w");
        else
          printf("-");
        if ((fileMode & S_IXGRP) && (fileMode & S_IEXEC))
          printf("x");
        else
          printf("-");
        /* check other user permissions */
        if ((fileMode & S_IROTH) && (fileMode & S_IREAD))
          printf("r");
        else
          printf("-");
        if ((fileMode & S_IWOTH) && (fileMode & S_IWRITE))
          printf("w");
        else
          printf("-");
        if ((fileMode & S_IXOTH) && (fileMode & S_IEXEC))
          /* because this is the last permission, leave 3 blank spaces after print */
          printf("x   ");

DONE! I will stick to this because its my own code, and it works well enough for me!!!!!

You probably want an else on the last if.

LOL ...Just missed out the copy bit of the last:

Code:

else
  printf("-   );