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nagios-plugins  1.4.16
Classes | Functions
fsusage.h File Reference
#include <stdint.h>
#include <stdbool.h>
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Classes

struct  fs_usage

Functions

int get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)

Class Documentation

struct fs_usage

Definition at line 27 of file fsusage.h.

Class Members
uintmax_t fsu_bavail
bool fsu_bavail_top_bit_set
uintmax_t fsu_bfree
uintmax_t fsu_blocks
uintmax_t fsu_blocksize
uintmax_t fsu_ffree
uintmax_t fsu_files

Function Documentation

int get_fs_usage ( char const file,
char const disk,
struct fs_usage fsp 
)

Definition at line 95 of file fsusage.c.

{
#if defined STAT_STATVFS                /* POSIX */

  struct statvfs fsd;

  if (statvfs (file, &fsd) < 0)
    return -1;

  /* f_frsize isn't guaranteed to be supported.  */
  fsp->fsu_blocksize = (fsd.f_frsize
                        ? PROPAGATE_ALL_ONES (fsd.f_frsize)
                        : PROPAGATE_ALL_ONES (fsd.f_bsize));

#elif defined STAT_STATFS2_FS_DATA      /* Ultrix */

  struct fs_data fsd;

  if (statfs (file, &fsd) != 1)
    return -1;

  fsp->fsu_blocksize = 1024;
  fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.fd_req.btot);
  fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.fd_req.bfree);
  fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.fd_req.bfreen);
  fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.fd_req.bfreen) != 0;
  fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.fd_req.gtot);
  fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.fd_req.gfree);

#elif defined STAT_READ_FILSYS          /* SVR2 */
# ifndef SUPERBOFF
#  define SUPERBOFF (SUPERB * 512)
# endif

  struct filsys fsd;
  int fd;

  if (! disk)
    {
      errno = 0;
      return -1;
    }

  fd = open (disk, O_RDONLY);
  if (fd < 0)
    return -1;
  lseek (fd, (off_t) SUPERBOFF, 0);
  if (full_read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
    {
      close (fd);
      return -1;
    }
  close (fd);

  fsp->fsu_blocksize = (fsd.s_type == Fs2b ? 1024 : 512);
  fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.s_fsize);
  fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.s_tfree);
  fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.s_tfree);
  fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.s_tfree) != 0;
  fsp->fsu_files = (fsd.s_isize == -1
                    ? UINTMAX_MAX
                    : (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1));
  fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.s_tinode);

#elif defined STAT_STATFS3_OSF1

  struct statfs fsd;

  if (statfs (file, &fsd, sizeof (struct statfs)) != 0)
    return -1;

  fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize);

#elif defined STAT_STATFS2_BSIZE        /* 4.3BSD, SunOS 4, HP-UX, AIX */

  struct statfs fsd;

  if (statfs (file, &fsd) < 0)
    return -1;

  fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize);

# ifdef STATFS_TRUNCATES_BLOCK_COUNTS

  /* In SunOS 4.1.2, 4.1.3, and 4.1.3_U1, the block counts in the
     struct statfs are truncated to 2GB.  These conditions detect that
     truncation, presumably without botching the 4.1.1 case, in which
     the values are not truncated.  The correct counts are stored in
     undocumented spare fields.  */
  if (fsd.f_blocks == 0x7fffffff / fsd.f_bsize && fsd.f_spare[0] > 0)
    {
      fsd.f_blocks = fsd.f_spare[0];
      fsd.f_bfree = fsd.f_spare[1];
      fsd.f_bavail = fsd.f_spare[2];
    }
# endif /* STATFS_TRUNCATES_BLOCK_COUNTS */

#elif defined STAT_STATFS2_FSIZE        /* 4.4BSD */

  struct statfs fsd;

  if (statfs (file, &fsd) < 0)
    return -1;

  fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize);

#elif defined STAT_STATFS4              /* SVR3, Dynix, Irix, AIX */

# if !_AIX && !defined _SEQUENT_ && !defined DOLPHIN
#  define f_bavail f_bfree
# endif

  struct statfs fsd;

  if (statfs (file, &fsd, sizeof fsd, 0) < 0)
    return -1;

  /* Empirically, the block counts on most SVR3 and SVR3-derived
     systems seem to always be in terms of 512-byte blocks,
     no matter what value f_bsize has.  */
# if _AIX || defined _CRAY
   fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize);
# else
   fsp->fsu_blocksize = 512;
# endif

#endif

#if (defined STAT_STATVFS \
     || (!defined STAT_STATFS2_FS_DATA && !defined STAT_READ_FILSYS))

  fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.f_blocks);
  fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.f_bfree);
  fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.f_bavail);
  fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.f_bavail) != 0;
  fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.f_files);
  fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.f_ffree);

#endif

  (void) disk;  /* avoid argument-unused warning */
  return 0;
}

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