As for the sprintf line, this session under the debugger shows you how the $mode value (coming from stat($file)[2]) might be converted: 

  DB<1>  @c = stat "data.txt";

  DB<2> x @c
0  1946693715
1  6473924464489865
2  33261
3  1
4  1001
5  513
6  0
7  64
8  1375303088
9  1375303088
10  1375303088
11  65536
12  1
  DB<3>  $mode = $c[2];

  DB<4>  printf "%04o", $mode ;
100755
  DB<5>  printf "%04o", $mode & 07777;
0755

[download]

BTW, my "data.txt" does indeed have the 0755 permissions:

$ ls -l data.txt
-rwxr-xr-x 1 Laurent None    64 31 juil. 22:38 data.txt

[download]

In the Unix file permission system, "rwxr-xr-x" is the same as the 0755 octal value.

In reply to Re: What does ">>" do? (And other stat questions) by Laurent_R
in thread What does ">>" do? (And other stat questions) by three18ti

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