lib/tst_is_cwd.c

   1 /*
   2  * Michal Simek <monstr@monstr.eu>, 2009-08-03 - ramfs
   3  * Kumar Gala <galak@kernel.crashing.org>, 2007-11-14 - nfs
   4  * Ricky Ng-Adam <rngadam@yahoo.com>, 2005-01-01 - tmpfs
   5  *
   6  * DESCRIPTION
   7  *      Check if current directory is on a tmpfs/nfs/ramfs filesystem
   8  *      If current directory is tmpfs/nfs/ramfs, return 1
   9  *      If current directory is NOT tmpfs/nfs/ramfs, return 0
  10  */
  11
  12 #include <sys/vfs.h>
  13
  14 #define TMPFS_MAGIC 0x01021994 /* man 2 statfs */
  15 int tst_is_cwd_tmpfs(void)
  16 {
  17         struct statfs sf;
  18         statfs(".", &sf);
  19
  20         /* Verify that the file is not on a tmpfs (in-memory) filesystem */
  21         return sf.f_type == TMPFS_MAGIC ? 1 : 0;
  22 }
  23
  24 #define NFS_MAGIC 0x6969 /* man 2 statfs */
  25 int tst_is_cwd_nfs(void)
  26 {
  27         struct statfs sf;
  28         statfs(".", &sf);
  29
  30         /* Verify that the file is not on a nfs filesystem */
  31         return sf.f_type == NFS_MAGIC ? 1 : 0;
  32 }
  33
  34 #define RAMFS_MAGIC 0x858458f6
  35 int tst_is_cwd_ramfs(void)
  36 {
  37         struct statfs sf;
  38         statfs(".", &sf);
  39
  40         /* Verify that the file is not on a ramfs (in-memory) filesystem */
  41         return sf.f_type == RAMFS_MAGIC ? 1 : 0;
  42 }