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 #if HAVE_ERRNO_H
  20 #include <errno.h>
  21 #endif
  22 #include <sys/types.h>
  23 #include <sys/stat.h>
  24 #if HAVE_EXT2_IOCTLS
  25 #include <sys/ioctl.h>
  26 #endif
  27
  28 #include "e2p.h"
  29
  30 int getflags (int fd, unsigned long * flags)
  31 {
  32         struct stat buf;
  33 #if HAVE_STAT_FLAGS
  34
  35         if (fstat (fd, &buf) == -1)
  36                 return -1;
  37
  38         *flags = 0;
  39 #ifdef UF_IMMUTABLE
  40         if (buf.st_flags & UF_IMMUTABLE)
  41                 *flags |= EXT2_IMMUTABLE_FL;
  42 #endif
  43 #ifdef UF_APPEND
  44         if (buf.st_flags & UF_APPEND)
  45                 *flags |= EXT2_APPEND_FL;
  46 #endif
  47 #ifdef UF_NODUMP
  48         if (buf.st_flags & UF_NODUMP)
  49                 *flags |= EXT2_NODUMP_FL;
  50 #endif
  51
  52         return 0;
  53 #else
  54 #if HAVE_EXT2_IOCTLS
  55         int r, f;
  56
  57         if (!fstat(fd, &buf) &&
  58             !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode))
  59                 goto notsupp;
  60         r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
  61         *flags = f;
  62
  63         return r;
  64 notsupp:
  65 #endif /* HAVE_EXT2_IOCTLS */
  66 #endif
  67         errno = EOPNOTSUPP;
  68         return -1;
  69 }