lib/e2p/getflags.c

   1 /*
   2  * getflags.c           - Get a file flags on an ext2 file system
   3  *
   4  * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
   5  *                           Laboratoire MASI, Institut Blaise Pascal
   6  *                           Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  * %Begin-Header%
   9  * This file may be redistributed under the terms of the GNU Library
  10  * General Public License, version 2.
  11  * %End-Header%
  12  */
  13
  14 /*
  15  * History:
  16  * 93/10/30     - Creation
  17  */
  18
  19 #include "config.h"
  20 #if HAVE_ERRNO_H
  21 #include <errno.h>
  22 #endif
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #if HAVE_EXT2_IOCTLS
  26 #include <sys/ioctl.h>
  27 #endif
  28
  29 #include "e2p.h"
  30
  31 int getflags (int fd, unsigned long * flags)
  32 {
  33         struct stat buf;
  34 #if HAVE_STAT_FLAGS
  35
  36         if (fstat (fd, &buf) == -1)
  37                 return -1;
  38
  39         *flags = 0;
  40 #ifdef UF_IMMUTABLE
  41         if (buf.st_flags & UF_IMMUTABLE)
  42                 *flags |= EXT2_IMMUTABLE_FL;
  43 #endif
  44 #ifdef UF_APPEND
  45         if (buf.st_flags & UF_APPEND)
  46                 *flags |= EXT2_APPEND_FL;
  47 #endif
  48 #ifdef UF_NODUMP
  49         if (buf.st_flags & UF_NODUMP)
  50                 *flags |= EXT2_NODUMP_FL;
  51 #endif
  52
  53         return 0;
  54 #else
  55 #if HAVE_EXT2_IOCTLS
  56         int r, f;
  57
  58         if (!fstat(fd, &buf) &&
  59             !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode))
  60                 goto notsupp;
  61         r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
  62         *flags = f;
  63
  64         return r;
  65 notsupp:
  66 #endif /* HAVE_EXT2_IOCTLS */
  67 #endif
  68         errno = EOPNOTSUPP;
  69         return -1;
  70 }