lib/permstring.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4    Copyright (C) 2001 by Martin Pool <mbp@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "rsync.h"
  22
  23 /**
  24  * Produce a string representation of Unix mode bits like that used by
  25  * ls(1).
  26  *
  27  * @param buf buffer of at least 11 characters
  28  **/
  29 void permstring(char *perms,
  30                 int mode)
  31 {
  32         static const char *perm_map = "rwxrwxrwx";
  33         int i;
  34
  35         strcpy(perms, "----------");
  36
  37         for (i=0;i<9;i++) {
  38                 if (mode & (1<<i)) perms[9-i] = perm_map[8-i];
  39         }
  40
  41         /* Handle setuid/sticky bits.  You might think the indices are
  42          * off by one, but remember there's a type char at the
  43          * start.  */
  44         if (mode & S_ISUID)
  45                 perms[3] = (mode & S_IXUSR) ? 's' : 'S';
  46
  47         if (mode & S_ISGID)
  48                 perms[6] = (mode & S_IXGRP) ? 's' : 'S';
  49
  50 #ifdef S_ISVTX
  51         if (mode & S_ISVTX)
  52                 perms[9] = (mode & S_IXOTH) ? 't' : 'T';
  53 #endif
  54
  55         if (S_ISLNK(mode)) perms[0] = 'l';
  56         if (S_ISDIR(mode)) perms[0] = 'd';
  57         if (S_ISBLK(mode)) perms[0] = 'b';
  58         if (S_ISCHR(mode)) perms[0] = 'c';
  59         if (S_ISSOCK(mode)) perms[0] = 's';
  60         if (S_ISFIFO(mode)) perms[0] = 'p';
  61 }
  62
  63